The Wealth Delta Tax: Corporate Architecture
Wealth Delta Tax, wealth taxation, corporate taxation, corporate wealth taxation, listed companies, beneficial ownership, shareholder attribution, unrealised equity gains, corporate reporting, intermediary pass-through, foreign ownership, tax incidence, corporate tax transition
Revision History
| Revision | Date | Details |
|---|---|---|
| 0.01 | 26 June 2026 | First Draft |
| 1.00 | 15 August 2026 | Published to website |
| 1.01 | 20 August 2026 | Updated section 5 for clarity |
| 1.02 | 20 September 2026 | Crosslinks added: §6.3 three-instrument SWF overview now points to (VAL §13) for sovereign liquidity facility; §6.4 extended with (GOV.B §H) pointer for Custodian mandate extension; §9.5 calibration register now cites (GOV.B §H.5) for the five corporate facility parameters and (CORP.A §B.2.8) for \(\tau_h\) ramp parameters |
Abstract
The WDT taxes annual changes in individual net worth. For listed companies with dispersed ownership, attributing appreciation to individual shareholders at scale is not practically achievable. Existing instruments, including corporate income tax, capital gains tax, and dividend taxation, do not capture retained, unrealised appreciation as it accrues. This paper designs the corporate collection mechanism that closes the resulting coverage gap.
The mechanism applies to listed companies only. Private companies present a valuation problem rather than an attribution problem and remain within individual WDT assessment under the companion valuation paper. For listed companies, the corporation calculates an annual market capitalisation delta, pays a provisional levy into a settlement account, and issues delta statements to registered shareholders. Native WDT shareholders settle individually and claim credits within a fixed one-year reconciliation window. The gap between the provisional rate and each shareholder’s marginal rate is recovered automatically through individual settlement.
Ownership is divided into three tranches. Native shareholders receive hard legal credits. Identified intermediaries, including brokers, custodians, and pooled funds, are assessed at the entry-level rate at the company level; where they can identify and attribute their underlying beneficiaries, downstream pass-through to individual reconciliation is available. Unidentified beneficial ownership bears a higher final charge. The operative test throughout is whether a continuous attribution chain exists from the registered holder to the underlying economic beneficiary.
The paper also settles corporate lifecycle rules for IPO transitions, mergers, and share buybacks; closes the double-counting question for derivative and synthetic exposure; establishes that loss years generate no corporate levy; and records four previously open questions as resolved, including the derivatives double-counting risk and the treatment of voluntary below-threshold participation. Rate calibration and the corporate instrument’s long-run relationship to corporate income tax remain open.
Glossary
Assessment date: The fixed annual date on which a listed corporation measures its market capitalisation delta for WDT purposes.
Assessment year: The twelve-month period ending on the assessment date.
Attribution test: The operative test applied to every tranche-two holder: whether the intermediary can identify and attribute its underlying beneficiaries to a degree sufficient to support individual WDT reconciliation. Attributability, not entity type, determines treatment.
Corporate delta: The raw change in a listed company’s market capitalisation from one assessment date to the next. This is the tax base for the provisional levy.
Credit: The amount released against a native shareholder’s individual WDT liability on confirmed settlement within the reconciliation window. Equal to \(\tau_{prov}\) multiplied by the shareholder’s allocated corporate delta. A hard legal claim against the company, not contingent on adequate provisioning.
Native shareholder: An individual within scope of individual WDT assessment as a domestic taxpayer.
Provisional levy: The amount the corporation pays into the settlement account on the assessment date: \(\tau_{prov}\) multiplied by the corporate delta, where \(\tau_{prov}\) is at least \(\tau_0\). The corporation sets the rate; it bears the shortfall risk of its own choice.
Reconciliation window: The one-year period from the assessment date within which native shareholders must settle their individual WDT for that year and register their credit claim. Fixed for all native shareholders regardless of their individual rolling assessment window length.
Settlement account: The dedicated account into which the provisional levy is paid and from which credits are released. Closes for each assessment year one year after the assessment date.
\(\tau_0\): The individual WDT entry-level effective rate. The floor for the corporate provisional levy and the rate applied as a provisional final charge to identified intermediaries at the company level.
\(\tau_h\): The higher unresolved rate applied as a final charge to unidentified beneficial ownership at the company level, and to unattributable positions within an intermediary’s own book. Unlike \(\tau_{prov}\), \(\tau_h\) is a final liability with no downstream reconciliation. Its calibration range is [deterrence floor, \(\tau_m\)]: the floor is set by the deterrence condition net of the refund-forfeiture effect (permanently unattributed positions forfeit access to the symmetric loss-refund mechanism, partially substituting for rate-based deterrence); the ceiling is \(\tau_m\) on revenue-recovery grounds. Legal proportionality does not compress this range materially from above: any beneficial owner who contests \(\tau_h\) must first establish standing by identifying themselves, which is itself an attribution event dissolving \(\tau_h\)’s application. The exit from \(\tau_h\) is always within the claimant’s own control. The Governing Council holds discretion within [deterrence floor, \(\tau_m\)] as a statutory parameter; corporations have no discretion over it. See (CORP.A §B.2) for the full derivation.
Tranche: One of three ownership categories for the provisional levy. Tranche one covers native shareholders; tranche two covers identified intermediaries; tranche three covers unidentified beneficial owners.
1. Introduction
For large listed companies, individual WDT assessment is impractical: ownership is dispersed across foreign holders, institutional pools, and below-threshold shareholders. Appreciation is observable in aggregate; it cannot be attributed at scale. This paper designs the corporate collection mechanism that closes that gap.
The corporate levy is a collection mechanism, not a tax on corporate wealth. The company is the settlement point because its delta is mechanically observable and it is a durable regulated entity.
The mechanism applies to listed companies across three ownership tranches. Native WDT shareholders settle individually and claim corporate credits. Identified intermediaries pay \(\tau_0\) at the company level; downstream pass-through is available where they can identify and attribute their underlying beneficiaries, and a final charge applies where they cannot. Unidentified beneficial owners are assessed at \(\tau_h\). The operative question for the middle tranche is whether a continuous attribution chain exists from the registered holder to the underlying economic beneficiary. Where that chain breaks, treatment follows the level at which attribution fails. Private companies present a valuation problem rather than an attribution problem and remain within individual WDT assessment under (VAL).
The paper proceeds as follows. (CORP §2) establishes why existing instruments are insufficient. (CORP §3) derives the corporate instrument from the WDT’s individual-centred logic. (CORP §4) establishes the listed/private distinction and, in (CORP §4.1), sets out design rules for IPOs, mergers, buybacks, thin trading, suspension and delisting, and dual-class share structures. (CORP §5) specifies the levy in full: calculation, provisional levy, credit release, intermediary pass-through, and final settlement.(CORP §6) describes the corporate equity settlement facility available as an alternative to cash settlement of the provisional levy. (CORP §7) states the attribution test for institutional ownership. (CORP §8) addresses derivatives and synthetic exposure.
2. Why Existing Corporate Tax Systems Are Insufficient
Existing corporate tax systems measure income flows or realisation events. None capture unrealised, retained appreciation as it accrues, which is the WDT’s tax base (WP §3.1).
The gap between taxable income and Haig-Simons income, which includes all changes in net worth realised or not, is administrative in origin (Haig, 1921; Simons, 1938). Shakow (1986) made the theoretical case for direct annual taxation of unrealised gains but left the valuation problem for illiquid assets unresolved. Auerbach (1991) retrospective capital gains tax approximates accrual taxation mathematically but remains conditioned on a realisation event. Batchelder & Kamin (2019) conclude that loss treatment remains unresolved as a design matter across this literature.
Corporate income tax falls on accounting profit in the period it arises. A company can appreciate substantially in value while reporting modest or negative earnings. Capital gains tax links taxation to a later realisation event. Dividend taxation captures only distributed value. In each case, no recognition occurs until a distribution, sale, or accounting event surfaces the appreciation.
The corporate instrument requires a WDT-specific collection mechanism operating through existing corporate infrastructure, including share registers, market valuation data, and reporting systems. No new corporate institution is required.
Corporate income tax and dividend taxation create distortions qualitatively worse than capital gains tax, because they operate on declared profit rather than observable wealth change. Declared profit is an accounting construct with enormous discretion. Transfer pricing, IP location strategies, thin capitalisation and intragroup debt arrangements, and the retained-earnings bias created by double taxation of distributed profit all consume real resources while producing no economic value. Share buybacks over dividends emerge as a rate-arbitrage strategy under dividend taxation. The only serious argument for corporate income tax as a system is collection security: it taxes corporate-level accumulation before wealth reaches identifiable individuals, providing a revenue floor where individual attribution is incomplete. That is a collection argument, not an efficiency argument, and it is the same argument the corporate delta levy makes on a different and better tax base.
The WDT corporate levy sidesteps these distortions because its tax base is annual market capitalisation change, not declared profit. Transfer pricing becomes irrelevant: where profits sit within a corporate group does not affect what the market values the listed parent at. Income-to-capital conversion becomes irrelevant: the delta mechanism does not distinguish income from capital. The debt preference partially dissolves: debt affects the delta symmetrically as a liability on both sides of the net worth calculation. The avoidance architecture that has accumulated around the current system collapses not because each structure is identified and targeted, but because the conditions that make those structures function are removed at the base.
2.1 Existing Administrative Analogues
The closest existing administrative infrastructure to the WDT corporate mechanism is securities withholding. Dividend withholding tax, securities settlement systems, beneficial ownership reporting, and nominee arrangements are standard components of financial market infrastructure in developed jurisdictions. A company acting as collection agent, remitting a levy on a defined base and issuing statements to registered shareholders, is an institutional role tax administrators already operate.
The structural parallel is direct. Under dividend withholding, a company pays a levy on distributions and registered shareholders receive credit statements proportional to their holdings. Foreign and ineligible holders receive nothing back because no individual claim exists to credit against, so the levy on their tranche is a final charge. Where shares are held through nominees, the existing withholding infrastructure already operates a layered settlement chain. The WDT corporate mechanism inherits this chain. The tax base is market capitalisation movement rather than distributions; the settlement channel is otherwise unchanged. Weisbach (2000) examined selective mark-to-market treatment of financial assets through existing infrastructure; the WDT corporate mechanism follows a similar institutional logic while resolving the illiquid-asset problem through individual assessment rather than exclusion.
3. The Individual-Centred Logic and Its Limits
The WDT assesses individuals. Individual assessment captures corporate-linked appreciation directly where ownership is simple and concentrated. That link breaks down with dispersed listed ownership. The corporate instrument exists to close this attribution gap. Its scope is limited to cases where individual attribution is impractical; it does not treat corporations as independently taxable subjects.
This scope determines the instrument’s asymmetry. Individual WDT is symmetric: losses generate refunds because the loss falls on a person. A corporate loss does not represent a loss of individual welfare at the corporate level; shareholders experiencing losses are covered through their own individual WDT assessments. The corporate instrument’s treatment of loss years (CORP §5.5) follows directly from this.
4. The Listed/Private Distinction
Listed and private companies present different problems. Listed companies create an attribution problem: market capitalisation on a fixed annual date gives a clean tax base, but ownership is dispersed. Private companies create a valuation problem: ownership is concentrated but market prices are unavailable. The corporate instrument applies to listed companies only. Private companies are handled through individual WDT assessment under (VAL).
| Listed | Private | |
|---|---|---|
| Delta | Observable market cap | Self-declaration; see (VAL) |
| Attribution | Dispersed, foreign, institutional | Concentrated |
| Mechanism | Corporate withholding levy (CORP §5) | Individual WDT assessment |
| Corporate instrument | Required | Not required |
4.1 Corporate Lifecycle Events
Three categories of corporate transformation require settled design rules in addition to steady-state conditions.
IPO transition. Before listing, private company appreciation is assessed through individual WDT, with shareholders self-declaring relevant company value under (VAL). At listing, the IPO valuation becomes the opening basis for the corporate instrument. The corporate delta begins from the IPO valuation minus the previously declared private-company WDT basis. Pre-IPO appreciation remains within individual WDT assessment; post-IPO appreciation enters the corporate mechanism. Any gap between the declared private basis and the IPO price enters the individual’s delta in the year of listing through the ordinary delta mechanism.
Mergers and share-for-share exchanges. The surviving company inherits the combined WDT basis, accumulated corporate delta history, unresolved ownership treatment, and available corporate tax credits. The merger itself does not create a new taxable delta. After the merger, the new corporate delta is the current value of the surviving company minus the inherited combined WDT basis.
A share-for-share exchange is a realisation event at the individual level: appreciation in the acquired company’s shares up to the exchange enters each shareholder’s individual WDT delta, and the received shares in the surviving company establish a new basis at exchange value. Where consideration is mixed cash and shares, the cash portion is a clean realisation and the share portion follows the exchange-value basis rule. A premium above either company’s standalone value is treated as additional wealth received at the exchange date and enters the relevant shareholder’s individual delta for that assessment year.
Corporate restructuring does not reset the WDT base.
Share buybacks. A buyback is an ownership restructuring event. The company does not recognise a new corporate delta solely because shares are repurchased. Treasury shares are excluded from economic ownership allocation. Remaining shareholders’ ownership percentages increase, and individual WDT liabilities adjust through changed net worth. Corporate provisional payments and shareholder credits continue unchanged. Shareholders receiving cash in buybacks have those proceeds enter their individual WDT delta through ordinary assessment.
Thinly traded listed companies. The corporate delta mechanism assumes a continuously traded public market capitalisation set by transactions between parties with no shared interest in any particular valuation outcome. Below a liquidity threshold, this assumption does not hold: infrequent trading produces a market cap figure that is either stale or manipulable around the assessment date through small-volume transactions. Where a nominally listed company falls below that threshold, it is reclassified to professional valuation under Route B (VAL §4.2) of the VAL framework rather than assessed through the corporate delta mechanism. The liquidity threshold is a Governing Council calibration parameter under the Tier 1 process, informed by Phase One data on price volatility and assessment-date trading volumes relative to outstanding float.
Suspended and delisted companies. Suspension or delisting mid-year is a corporate position closure event of the same structural type as an individual taxpayer’s exit from the WDT: the assessment position closes, the final delta is calculated to the last reliable traded price, and the running account is settled. The general position closure framework in (CLOSE) applies directly and requires no separate corporate rule. Relisting following suspension or delisting reopens the corporate position from an IPO basis at the relisting price, following the IPO transition rules above.
Dual-class share structures. Where a company has multiple share classes with different economic entitlements, delta is allocated to each class proportionally to its economic entitlement per share, not its voting rights. Delta statements must specify the per-class economic entitlement ratio used for allocation, so that each registered shareholder can verify the figure attributed to their holding.
5. The Listed Company Corporate Delta Levy
5.1 The Mechanism in One Place
The corporate delta levy is escrow, not a tax. A listed company measures its annual market-capitalisation change, pays a provisional amount into a settlement account, and issues statements to registered shareholders showing each one’s proportional allocation. That provisional payment is held on behalf of individual WDT taxpayers whose liabilities will be assessed elsewhere, at their own marginal rates, through their own annual returns. Changing the provisional rate changes nothing about any reconciling shareholder’s final bill. It changes only the size of the subsequent correction flows.
Three things can happen to any given share of the corporate delta, depending on whether the ownership behind it is attributable and whether settlement follows:
Tranche one — native shareholders. The provisional amount operates as a credit against a confirmed individual WDT settlement. Where settlement is confirmed, the credit is released and the provisional amount exits the settlement account. Where it is not — death, emigration, insolvency, inaction — the provisional amount already held is the state’s only recovery. This is what floors the provisional rate at \(\tau_0\): not a revenue target, but a collection-security minimum.
Tranche two — identified intermediaries. The company knows who the registered holder is but not who sits behind it. The intermediary pays \(\tau_0\) at the company level. Whether that resolves toward individual pass-through or a company-level final charge depends on the attribution test: can the intermediary identify and attribute its underlying beneficiaries to a degree sufficient to support individual WDT reconciliation? Where yes, the intermediary runs its own downstream reconciliation directly with the tax authority. Where no, \(\tau_0\) is final at the company level.
Tranche three — unidentified beneficial ownership. No owner can be established at any level. These positions bear \(\tau_h\) as a final charge. \(\tau_h\) is not a higher version of \(\tau_{prov}\); it is a different instrument operating on a different calibration logic. Its range is [deterrence floor, \(\tau_m\)], where the floor is set by the condition that permanent opacity must be economically irrational net of the refund-forfeiture effect, and the ceiling is \(\tau_m\) on revenue-recovery grounds. Legal proportionality does not compress this range from above: mounting a challenge to \(\tau_h\) requires establishing standing as beneficial owner, which is itself an attribution event triggering reclassification and dissolving \(\tau_h\)’s application. The exit from \(\tau_h\) is always within the claimant’s own control. The Governing Council sets \(\tau_h\) as a statutory parameter; the corporation has no discretion over it. The full derivation is in (CORP.A §B.2).
| Ownership category | Tranche | Rate at company level | Resolution |
|---|---|---|---|
| Native shareholder, on register at assessment date | 1 | \(\tau_{prov}\) | Credit released on confirmed individual settlement; lapses on non-claim; lapsed amount refunded to corporation |
| Native shareholder who voluntarily waives credit | 1 | \(\tau_{prov}\) | Credit lapses by election; provisioned amount refunded to corporation at window close |
| Native shareholder, sold before assessment date | 1 | \(\tau_{prov}\) on proportional share | Credit released on confirmed individual settlement matched via sale |
| Identified intermediary passing the attribution test | 2 | \(\tau_0\) | Intermediary runs own reconciliation with tax authority; claims back \(\tau_0\) on below-threshold clients; native shareholders settle individually; unattributable remainder bears \(\tau_h\) at intermediary level |
| Identified holder failing the attribution test | 2 | \(\tau_0\), final at one-year close | None |
| Foreign entity — beneficial owner identified | 2 | \(\tau_c\) | Foreign beneficial owner established but outside individual WDT reconciliation. Bears \(\tau_c\) as a final charge. \(\tau_f\) (by diplomatic agreement) may modify treatment downward. See (CORP.A §F.1). |
| Foreign entity — beneficial owner unidentified | 2 | \(\tau_f\) on unattributed portion | Set by bilateral diplomatic agreement; defaults to \(\tau_h\) where no agreement exists. |
| Unidentified beneficial owner | 3 | \(\tau_h\), final at one-year close | None |
Individual progressivity is fully preserved wherever attribution succeeds. A native shareholder pays WDT at their own marginal rate on their total net worth delta, including the corporate allocation. The gap between what the corporation provisioned and what the shareholder’s marginal rate produces flows automatically through individual settlement. Progressive assessment is not compromised by a flat provisional rate; the two operate on separate tracks.
5.2 Annual Cycle: Measurement and Reporting
On the assessment date, the corporation calculates the corporate delta — the change in market capitalisation from the prior assessment date. Within sixty days it issues delta statements to all registered shareholders showing each holder’s proportional allocation based on holdings at the assessment date. The delta statement is a statutory reporting document. Each native WDT shareholder includes their allocated amount in their annual WDT return.
On the same assessment date, the corporation pays the provisional levy into the settlement account at a rate of at least \(\tau_0\), chosen by the corporation and disclosed publicly. The settlement account holds this amount separately until the one-year reconciliation window closes.
The provisional levy is ordinarily paid in cash. Any listed company may instead use the corporate equity settlement facility in (CORP §6), transferring shares to the SWF in lieu of cash. Both routes discharge the provisional obligation on the same terms.
The corporation’s rate-setting choice is a governance signal. Provisioning at \(\tau_0\) signals low uncertainty about the ownership population: minimal non-reconciling holders and minimal unattributable positions. A substantially higher rate signals the reverse. The corporation bears the cash-flow risk of its own choice: underprovisioning against tranche-one hard legal credits creates a shortfall obligation payable from treasury before the window closes; overprovisioning produces a refund at the close.
The corporation’s rate-setting decision also implicates a shareholder-level tension the mechanism does not resolve. Native shareholders with high marginal WDT rates have a direct financial incentive to push \(\tau_{prov}\) upward: a larger provisional payment means a larger credit offset against their individual liability, improving their personal cash flow in the assessment year. The corporation bears the cost — higher provisioning reduces retained earnings available for reinvestment and may dampen growth, which feeds into a smaller delta in future years. A controlling shareholder who is also a high-bracket WDT taxpayer therefore faces a conflict between their personal tax position and the long-run corporate value on which their future WDT base depends. The mechanism does not resolve this tension; it leaves it to ordinary corporate governance, subject to the transparency that the public disclosure requirement provides. The disclosure requirement matters here precisely because it allows minority shareholders, analysts, and the tax authority to distinguish a rate reflecting genuine uncertainty about ownership composition from one reflecting a controlling shareholder’s personal rate optimisation.
5.3 Tranche Outcomes During the Year
Tranche one. When a native shareholder settles their individual WDT for the assessment year within the one-year window, the tax authority confirms settlement and releases the credit. The shareholder pays WDT at their own marginal rate on their full net worth delta including the corporate allocation; the corporation’s provisional payment offsets that liability proportionally. A shareholder who elects not to claim does not reduce their WDT liability — they pay in full without the credit offset — and the provisioned amount returns to the corporation as an overprovision refund at the window close.
A shareholder on a multi-year rolling assessment window must still claim each year’s corporate credit within that year’s one-year window. The rolling window governs when total accumulated WDT is settled; it does not extend the deadline for registering corporate credits. A lapsed credit does not reduce the eventual rolling settlement.
For shareholders who sell before the assessment date, their gain enters their individual WDT delta through the sale rather than through a delta statement. They do not appear on the register at assessment date. They claim their corporate credit in the same way as any other native shareholder — by settling their individual WDT for the relevant year within the standard one-year window — and the tax authority matches the corporate component of their gain to the relevant company at that point. Credits do not transfer at the point of sale; they are generated by settlement of a specific wealth event, not by ownership of the shares themselves.
Tranche two. An identified intermediary pays \(\tau_0\) at the company level. Whether that resolves to pass-through or a final charge turns entirely on the attribution test established in (CORP §7): can this intermediary identify and attribute its underlying beneficiaries sufficiently to support individual WDT reconciliation?
Where it can, the intermediary submits a reconciliation return to the tax authority within the same one-year window, showing three populations within its book: below-threshold clients confirmed through registration, against whom the intermediary claims back the \(\tau_0\) paid on their shares; above-threshold native WDT shareholders who settle individually, triggering credit release through the normal tranche-one mechanism; and unattributable positions within the book, against which \(\tau_h\) applies as a final charge at the intermediary level. The intermediary may set its own provisional rate and bears full shortfall risk at each level of the chain. Its provisional rate and the basis for it are required public disclosures.
Where the intermediary cannot pass the attribution test, \(\tau_0\) is final at the company level. No downstream recovery mechanism exists.
This architecture is self-sorting. Below-threshold clients who register voluntarily allow the intermediary to claim back \(\tau_0\) on their shares. Unregistered clients sit in the intermediary’s unattributable remainder and cost the intermediary \(\tau_h\) rather than nothing. The intermediary therefore has a direct financial incentive to encourage registration, which in turn progressively clears legitimately below-threshold shareholders from the tranche-three population. What remains in tranche three after this sorting process consists primarily of positions that have declined attribution at every level available to them — opaque offshore vehicles, bearer arrangements, structures designed to conceal ownership — which is why \(\tau_h\) at that level is defensible.
Tranche three. No action during the year. \(\tau_h\) attaches at assessment date and is settled at the one-year close as described in (CORP §5.4) below.
5.4 Year-End Settlement
The settlement account closes one year after the assessment date, at which point the provisional levy at \(\tau_{prov}\) is converted into final outcomes across all three tranches.
Tranche-one credits claimed progressively during the year have already been released against confirmed individual settlements. The remaining tranche-one balance — provisioned at \(\tau_{prov}\) against shareholders who lapsed by inaction or waived by election — is refunded to the corporation. This does not extinguish the underlying WDT liability of a shareholder who failed to claim; they remain liable through individual assessment for the full delta including the uncredited corporate allocation.
Tranche-two holders settle at two distinct levels.
At the company level, the corporation pays \(\tau_{0}\) on the intermediary’s registered tranche and is done. This is true regardless of what the intermediary can or cannot see within its own book. The company’s settlement account closes at \(\tau_{0}\) for all identified intermediaries and carries no further exposure to downstream attribution outcomes.
At the intermediary level, the intermediary runs its own separate assessment against its own book. It pays \(\tau_{0}\) on each portion it can identify — whether those are individual beneficial owners, below-threshold registered clients, or further sub-intermediaries — and \(\tau_{h}\) on whatever portion it cannot attribute. Where the intermediary’s entire book is unattributable, it pays \(\tau_{h}\) on the full delta allocated to it by the company. Where it can attribute some portion, it pays \(\tau_{0}\) on that portion and \(\tau_{h}\) on the remainder. Greater attributability always reduces total cost, since \(\tau_{h}\) > \(\tau_{0}\); the incentive to identify runs in the right direction at every level of the chain.
The same logic applies recursively down the chain. A sub-intermediary identified by the first intermediary runs the same \(\tau_{0}\)/\(\tau_{h}\) split against its own book. The chain terminates when it reaches either an individually-assessable native WDT taxpayer — who settles through their own personal return — or a position that cannot be attributed further, which bears \(\tau_{h}\) at that level.
Tranche-three positions are assessed a final charge at \(\tau_{h}\). Any excess provisioned is refunded; any shortfall is a top-up obligation on the corporation payable before the account closes.
5.5 Loss Years
When market capitalisation falls, the corporation pays no levy and receives no refund. Shareholders whose total net worth delta is negative receive individual WDT refunds through personal assessment. The corporate instrument is uninvolved. Loss-sharing operates between the state and individual taxpayers, not through the corporate mechanism.
This follows directly from the individual-centred logic in (CORP §3): a corporate loss is not a loss of individual welfare at the corporate level. Corporations do not experience losses in any humanly meaningful sense. Shareholders experiencing losses are covered through their own assessments. Corporations may make private arrangements with shareholders regarding credits and refund years; such arrangements do not affect WDT liability or the levy calculation.
5.6 Residual Imperfections
Assessment date gaming. A shareholder could sell before the assessment date and repurchase afterwards to avoid appearing on the register. For non-native holders outside the individual WDT system this is a real gap: the revenue at stake is proportional to the appreciation on their tranche during the period of absence. The gap is bounded by trade scale, gap length, and carrying cost, and is present in any annual measurement system. It is accepted as an imperfection rather than closed by a rule that would impose continuous tracking costs disproportionate to the revenue. Derivatives and synthetic exposure raise related but distinct questions, addressed in (CORP §8).
Partial-year attribution. A buyer who purchases shares after a sale and holds through the assessment date receives a delta statement based on the company’s full-year delta, not just appreciation during their ownership period. The resulting minor overpayment is bounded by trade size and the length of the mismatched period; correcting it would require transaction-level tracking of every registered position against specific holding dates at administrative cost disproportionate to the revenue at stake. The overpayment resolves naturally across years as holding periods lengthen.
6. The Corporate Equity Settlement Facility
6.1 Purpose and Scope
The provisional levy creates a cash obligation for listed companies in every year their market capitalisation rises. For most listed companies this presents no difficulty: market appreciation and cash generation move broadly together over time, even if not in the same year. For companies whose market capitalisation has risen substantially because markets are pricing expected future earnings, but whose operations are not yet cash-generative, the cash obligation can be structurally misaligned with available liquidity. Such a company is not insolvent; it may have significant balance sheet assets. The problem is the timing mismatch between a tax base measured in market value and a settlement obligation requiring cash.
The facility resolves this mismatch. As an alternative to cash settlement, any listed company may transfer shares to the SWF at market price. The SWF issues a loan to the company equal to the levy amount, secured against those transferred shares. The company repays from future cash flows at its own pace, subject to the parameters established in this section. The company retains a right to repurchase the transferred shares at market price at any point before the maximum holding period expires.
The facility is optional throughout. The choice between cash settlement and the facility is a corporate treasury decision; both routes discharge the provisional levy obligation on the same terms. A company’s take-up of the facility, and the aggregate take-up rate across the assessment universe, are Phase One observables that bear on the relationship between market appreciation and corporate cash generation across the population.
6.2 Mechanism
On the assessment date, a company electing to use the facility notifies the Administrator and the SWF Custodian simultaneously. The company transfers shares to the SWF at the volume-weighted average market price over a defined pre-assessment window, the length of which is a Governing Council calibration parameter. The SWF Custodian issues a loan to the company for the amount of the provisional levy. The transferred shares are held by the SWF as security for the loan.
The company repays the loan at its own pace subject to a minimum annual repayment schedule, the rate of which is a Governing Council calibration parameter. Interest accrues at a rate set by the Governing Council; the rate is published in advance and applies uniformly to all facility users in the relevant assessment cycle. Partial repayment reduces the loan outstanding proportionally; partial share release follows pro-rata on repayment.
The company may repurchase the transferred shares at market price at any point: it pays the Custodian the current market value of the shares to be repurchased, the loan outstanding reduces by that amount, and the shares transfer back. There is no penalty for early repurchase. Where the market price at repurchase is below the transfer price, the company pays the lower current market value; the SWF absorbs the difference against the collateral value, which reduces accordingly. A margin call mechanism applies if the collateral value falls below a defined percentage of the outstanding loan; the margin call threshold is a Governing Council calibration parameter. On a margin call, the company may either contribute additional shares at current market price, repay a portion of the loan in cash, or allow the Custodian to sell a portion of the held shares into the market at market price to reduce the loan to within the threshold.
After the maximum holding period, if the loan has not been fully repaid, the SWF sells the remaining held shares into the market at market price. Proceeds settle the outstanding loan first; any surplus returns to the company. The maximum holding period is a Governing Council calibration parameter; it must be long enough to accommodate the realistic cash generation timeline of the companies the facility is designed to serve, but short enough that the SWF does not accumulate permanent strategic equity stakes in individual listed companies.
6.3 Relationship to the SWF
Shares transferred through the facility are held in a distinct named portfolio within the SWF, separate from the SRR’s low-correlation asset base and separate from any Route C equity positions accumulated through individual WDT settlement. This portfolio has its own risk parameters and mandate specifications. The annual stewardship statement published by the Custodian reports the corporate equity portfolio separately, including the aggregate loan book outstanding, the collateral value, the margin call position, and any sales made during the year on account of mandatory maximum-period expiry or margin calls.
The SWF’s balance sheet position is naturally countercyclical to the facility’s demand. Companies produce large positive deltas and face liquidity constraints during periods of rapid market appreciation, in which the SWF is also accumulating assets most quickly through the normal levy collection cycle. The SWF therefore accumulates corporate equity facility positions during exactly the periods when its overall asset position is strongest. In bear years, when the SWF’s net levy income falls or turns negative and its refund obligations rise, the facility’s existing positions are in rundown: companies that have recovered their cash generation are repaying loans and repurchasing shares, reducing the facility’s outstanding exposure. This countercyclical property is structural, not a consequence of active SWF investment management.
The facility is operationally distinct from the SWF’s bridging facility for individual taxpayers, established in (GOV.B §E.3). The bridging facility is a bond structure that decouples an individual’s physical departure from settlement of their personal WDT position; the corporate equity facility is a secured lending arrangement that decouples a company’s assessment-date obligation from its cash generation cycle. Both resolve timing mismatches between obligation and liquidity, but they operate through different instruments and are held in separate SWF portfolios. The third SWF credit instrument — the sovereign liquidity facility for individual taxpayers facing a WDT liability without ready cash on any cash-settled route — is in (VAL §13). All three instruments are described together in (VAL §13)’s three-instrument overview.
6.4 Governing Council Calibration Parameters
The following quantities are settled in kind but open in value, deferred to Phase One calibration under the Tier 1 process: the pre-assessment volume-weighted average window length used to set the transfer price; the loan interest rate; the minimum annual repayment schedule; the margin call threshold as a percentage of outstanding loan; and the maximum holding period. Each constrains one dimension of the facility’s design without determining it. The Governing Council holds discretion within the constraint each parameter imposes, informed by Phase One take-up data and the SWF Custodian’s assessment of the corporate equity portfolio’s risk position across assessment cycles. The Custodian’s mandate extension required to administer the corporate equity portfolio — distinct from the SRR and LRR mandates — is specified in (GOV.B §H), which sets out the portfolio’s separate risk parameters, the stewardship statement requirements, and the Custodian’s authority over mandatory-period-expiry sales and margin call execution.
7. Institutional Ownership
Every identified holder that holds shares on behalf of, or in a manner indirectly affecting, persons other than itself falls within tranche two of (CORP §5). The corporate instrument applies a single attribution test to all such holders: can the intermediary identify and attribute its underlying beneficiaries to a degree that supports individual WDT reconciliation? Where it can, downstream pass-through is available on the terms set out in (CORP §5). Where it cannot, either because the underlying claim is not a proportional, individually-assessable interest in specific shares, or because the intermediary lacks the information to identify who holds what, \(\tau_0\) is final at the company level.
Attributability, not entity type, is the operative category. A broker with full KYC on an identified client book sits at the pass-through end of the spectrum. A foreign sovereign wealth fund, which sits outside the individual WDT system entirely, sits at the final-charge end. Most cases in between are resolved by asking what the intermediary’s claim actually is: a direct legal interest in specific shares on behalf of named persons, or a pooled, contingent, or institutional claim with no such interest.
Defined contribution pension schemes sit closest to the pass-through boundary. A DC member’s account balance tracks fund NAV closely enough that the fund could calculate a proportional share of the corporate delta attributable to each member. The exclusion of DC schemes from reconciliation is a policy boundary, not a principled failure of the attribution test: extending reconciliation to scheme memberships numbering in the tens of millions, the overwhelming majority of whom are below the WDT threshold and whose credits would lapse unclaimed, creates administrative infrastructure disproportionate to the revenue at stake. This position should be revisited if Phase Two materially lowers the WDT threshold and brings a non-trivial share of DC membership above it.
Where the attribution chain breaks at a foreign entity, the applicable rate is not \(\tau_0\) but \(\tau_f\), set by bilateral or multilateral diplomatic agreement between the WDT jurisdiction and the foreign entity’s home jurisdiction. Any portion the foreign entity can attribute to a named beneficial owner bears \(\tau_c\) as a final charge; the unattributed residue bears \(\tau_f\). See (CORP.A §F.1) for \(\tau_c\) calibration and its role as an ownership-composition parameter. Where no agreement exists, \(\tau_f\) defaults to \(\tau_h\). The WDT does not set \(\tau_f\); it receives it as a diplomatic input. The mechanism’s recommendation, developed in (CORP.A §F), is that \(\tau_f\) vary on two factors: the home jurisdiction’s attribution cooperation, and the individual company’s own attribution percentage. Complete attribution is the exit from \(\tau_f\) exposure, as it is from every other elevated rate in the corporate instrument.
The attribution test is binary in its settled steady-state form: an intermediary either can attribute its underlying beneficiaries sufficiently to support individual WDT reconciliation, or it cannot. Whether a phased on-ramp during Phase One, under which intermediaries demonstrating improving attribution capability receive partial pass-through treatment proportional to the attributed share of their book, would accelerate uptake is a question only Phase One evidence can answer. If Phase One data supports it, the Governing Council may adopt such a transitional mechanism as a calibration parameter. By Phase Two the binary test applies in full, and no graduated treatment persists.
(CORP.A §C) classifies specific entity types against the attribution test. (CORP.A §E) extends the attribution analysis to non-corporate instruments, including charitable vehicles, special purpose vehicles, trusts, family limited partnerships, life insurance wrappers, and carried interest structures, demonstrating that the attribution test and delta mechanic produce the correct outcome for each without requiring a special regime.
8. Synthetic Exposure and Derivatives
A derivative position stands in a different relationship to the company than a share does. Three tiers of claim apply: legal ownership (the registered shareholder); beneficial ownership (the disclosed economic owner reachable through attribution); and economic exposure through derivatives, a contractual claim on price movement carrying no underlying share ownership. The corporate levy’s reconciliation mechanism reaches the first two tiers. It does not reach the third.
An option, swap, or other derivative referencing a company’s shares is an agreement between counterparties. The derivative holder’s claim runs against the counterparty. The company is the reference point for the contract, not a party to it. A call option buyer who gains £10 million has a claim against the option seller for £10 million, not a claim on £10 million of the company’s market capitalisation.
This separates the corporate delta levy from individual WDT assessment of a derivative holder. The corporate levy taxes the company’s market cap delta, reconciled against the liabilities of registered and disclosed shareholders. Individual WDT assessment of a derivative holder taxes a different legal claim: the gain or loss on a contract with a separate counterparty, arising from the same underlying price movement but resting on a different relationship. These are two distinct legal claims; the two instruments do not tax the same claim twice.
The exclusion of derivative holders from reconciliation is distinct from the attribution test applied to intermediaries in (CORP §7). An institution failing that test is excluded because the human claim behind its holding is too diffuse or contingent to reconcile against an individual liability, despite the institution holding real shares. A derivative holder has no position at the corporate level at all; the attribution test does not apply.
The treatment is uniform across instrument type. A swap, forward, short position, or structured note referencing the company’s price all carry claims running between counterparties.
| Position | Nature of claim | Reconciles against corporate levy? |
|---|---|---|
| Registered shareholder | Ownership of the company | Yes, proportional to holding |
| Disclosed beneficial owner | Ownership of the company | Yes, once disclosed |
| Derivative holder (long) | Contract with counterparty | No |
| Derivative counterparty (short) | Contract with counterparty | No |
Where a derivative counterparty is itself a taxable entity, typically a bank or institution running a derivatives book, any resulting gain or loss is treated under the ordinary WDT rules applicable to that entity.
Two items remain. Valuation methodology for derivative positions for individual WDT purposes, particularly where no liquid secondary market exists, is assigned to (VAL) (VAL §14.3). The disclosure problem for counterparties held through opaque OTC structures is the same disclosure and information-exchange problem that applies to unidentified beneficial ownership generally, handled through the tranche structure in (CORP §5) and not resolvable unilaterally.
The double-counting risk previously flagged in (VAL) is closed by this analysis. A derivative holder has no position in the corporate levy’s reconciliation ledger; no double-count can arise.
9. Limitations and Required Further Work
9.1 Formal modelling gaps
No items in this section. The rate calibration frameworks in (CORP.A §B) are complete at the analytical level; what remains is Phase One data and Governing Council decisions. Design questions for the corporate instrument are resolved at the conceptual level; what remains is calibration and legal analysis.
9.2 Phase One empirical unknowns
Whether the corporate instrument displaces corporate income tax outright in the long run is contingent on Phase One data about attribution rates, reconciliation rates, and the instrument’s interaction with existing corporate tax infrastructure.
Whether a phased on-ramp for the attribution test during Phase One, partial pass-through treatment proportional to attributed book share, would accelerate intermediary uptake is also Phase One contingent. The binary test applies in full by Phase Two.
The three observables required to calibrate \(\tau_0\) against a standing rule are: non-reconciliation rate by wealth band; distribution of non-reconciliation by reason (death, emigration, insolvency, administrative inaction); and average revenue shortfall per event by wealth band. These are available within the first one to two assessment cycles. The Governing Council should use them to convert the initial \(\tau_0\) calibration into a standing data-driven rule (CORP.A §B.1).
The attribution trend data required to calibrate \(\tau_h\) within [deterrence floor, \(\tau_m\)] is slower-moving and requires three to five assessment cycles before meaningful trends emerge. The three observables are: attribution test pass and fail rates by entity type; tranche-three share of listed corporate ownership over time; and composition of tranche-three positions by type (structural impossibility versus apparent deliberate choice). These feed \(\tau_h\) calibration under (CORP.A §B.2).
The intermediary-level provisioning floor — whether a lower floor than \(\tau_0\) should be formalised for intermediaries with demonstrably low residual unattributable populations — is Phase One contingent; whether the efficiency gain justifies the additional calibration complexity is a question Phase One data will begin to answer.
9.3 Jurisdiction-specific legal and implementation work
The interaction of the corporate delta levy with existing corporate income tax during the transition period requires jurisdiction-specific legal analysis. The question is not formally deferred to (SCOPE) because Phase One data will partially inform it before dedicated legal work begins; it sits at the boundary between Phase One evidence and legal analysis rather than cleanly in either.
9.4 Structural and irreducible limits of the design
The corporate instrument is a pragmatic departure from the WDT’s individual-centred moral logic, justified on coverage grounds. For large listed companies with dispersed ownership across foreign holders, institutional pools, and below-threshold retail shareholders, individual-level attribution at scale is not achievable. The instrument is a collection mechanism, not a tax on corporations as taxable subjects. Its necessity is not in dispute; its departure from the foundational moral axiom should be stated plainly rather than papered over.
The pool-average rate alternative — anchoring the corporate rate to the average effective WDT rate across a company’s actual shareholder pool — has been considered and rejected. It would give companies an incentive to shape ownership composition to minimise their rate and would require estimating an average effective rate for a dispersed, partly anonymous shareholder base, approaching the attribution problem the corporate mechanism exists to avoid. The flat-floor-with-individual-progressivity structure is the settled design.
Loss years generate no corporate levy and no corporate refund. The asymmetry is principled: corporations do not experience losses in any humanly meaningful sense. Shareholders experiencing losses are covered through their own individual WDT assessments. This last claim holds for native shareholders and identified intermediaries who pass the attribution test — precisely the populations who have individual WDT positions through which losses are recognised. It does not extend to tranche-three positions. Beneficial owners who have structured their holdings to be unattributable have no individual WDT assessment position for that holding; they have voluntarily placed themselves outside the attribution chain. The \(\tau_h\) charge on the unattributed share is paid by the company against that fraction of its ownership — it is not a substitute for individual assessment of an identified person, but the company-level consequence of unattributable ownership. A beneficial owner who denies the ownership to avoid attribution cannot subsequently claim the refund entitlement that attribution would have conferred. The asymmetry for tranche-three positions is therefore not a departure from the individual-centred axiom but a consequence of it: the axiom protects identified individuals, and a beneficial owner who has removed themselves from identification has removed themselves from its protection.
DC pension scheme exclusion from reconciliation is a policy boundary, not a principled failure of the attribution test. Extending reconciliation to memberships numbering in the tens of millions, the overwhelming majority of whom are below threshold and whose credits would lapse unclaimed, creates administrative infrastructure disproportionate to the revenue at stake. This position should be revisited if Phase Two materially lowers the threshold.
International opacity — assets held in jurisdictions outside existing information-exchange frameworks — cannot be reached by the domestic corporate mechanism. Exit taxation architecture and international coordination provide partial responses; complete coverage is not achievable under current international arrangements.
Threshold-based fragmentation, wealth distributed across multiple individuals none of whom individually exceeds the exemption threshold, falls outside the WDT’s scope by design. The threshold exists on administrative-cost grounds and on the moral judgment about differential capacity to bear bad years established in MF. The WDT does not attempt to reach below it regardless of how sub-threshold wealth is distributed.
9.5 Governing Council calibration parameters
\(\tau_{prov}\)’s exact floor is settled in kind (collection-security against reconciliation failure) but not in value. Exact calibration is a Governing Council parameter under the Tier 1 process, informed by Phase One non-reconciliation rate data. (CORP.A §B.1) provides the full derivation and the standing-rule structure for Phase One review.
\(\tau_h\)’s calibration within [deterrence floor, \(\tau_m\)] is a Governing Council parameter under the Tier 1 process, informed by Phase One attribution trend data. (CORP.A §B.2) provides the full derivation. The Governing Council holds discretion within the range. The ramp structure within (CORP.A §B.2) introduces two additional parameters: the transition window length over which \(\tau_h\) rises toward the ceiling, and the specific observable threshold at which each step in the schedule fires. Both are Governing Council decisions informed by Phase One aggregate tranche-three share data. The joint-calibration constraint established in (CORP.A §B.2) means the Governing Council must also determine the CIT and dividend displacement schedule as a co-designed parameter: the ramp pace and the offset pace are not independently optimisable without creating the arbitrage the ramp is designed to close.
Attribution test on-ramp mechanics during Phase One, if adopted, are a Governing Council calibration parameter. The binary test applies in full by Phase Two regardless.
The intermediary floor level, all rate calibration items for \(\tau_0\) and \(\tau_h\), are Governing Council parameters under the Tier 1 process. (CORP.A §B.1) to (CORP.A §B.3) provide the analytical foundations.
The corporate equity settlement facility introduces a cluster of additional calibration parameters: the pre-assessment volume-weighted average window used to set the transfer price; the loan interest rate; the minimum annual repayment schedule; the margin call threshold; and the maximum holding period before mandatory sale. All are Governing Council parameters under the Tier 1 process, informed by Phase One take-up data and the Custodian’s assessment of the corporate equity portfolio’s risk position across assessment cycles. These five parameters are listed as Tier 1 items in the master calibration register at (GOV.B §H.5), alongside the \(\tau_h\) ramp parameters derived in (CORP.A §B.2.8). The liquidity threshold below which a nominally listed company routes to Route B professional valuation rather than the corporate delta mechanism is also a Governing Council parameter, informed by Phase One data on price volatility and assessment-date trading volumes.
10. Conclusion
The corporate instrument closes the attribution gap that individual WDT assessment cannot reach. For large listed companies with dispersed ownership, appreciation is observable in aggregate but cannot be attributed to individual shareholders at scale. Existing instruments do not reach it. The mechanism designed here does.
Listed companies calculate an annual market capitalisation delta, pay a provisional levy across three ownership tranches, and issue delta statements to registered shareholders. Native WDT shareholders settle individually and claim credits. Identified intermediaries pay \(\tau_0\) at the company level and, where they pass the attribution test, run downstream reconciliation directly with the tax authority. Unattributable positions within an intermediary’s book bear \(\tau_h\) as a final charge. Unidentified beneficial ownership bears \(\tau_h\) at the company level. Loss years generate no corporate levy; shareholders experiencing losses are covered through their own individual WDT assessments. Private companies remain entirely within individual assessment.
A native shareholder who conceals ownership behind a nominee forfeits the corporate credit but not the individual WDT liability, because the two obligations run on separate legal tracks. DC pension scheme exclusion is a policy boundary, not a failure of the attribution test. Derivative holders have no position in the corporate levy’s reconciliation ledger; no double-count arises. Below-threshold retail shareholders may opt in at \(\tau_0\) under the lifetime contribution envelope provisions in (WP §3.4). Thinly traded listed companies route to Route B professional valuation below the liquidity threshold rather than the corporate delta mechanism. Suspension and delisting are corporate position closure events handled by the general framework in (CLOSE) without a separate corporate rule. Delta in dual-class structures is allocated by economic entitlement per share class, not by voting rights.