WDT — Interactive Calculators

Computational tools for exploring the Wealth Delta Tax mechanism. All calculators load their model code directly from the research codebase. Parameters are read from WDT_Params.toml. No server-side computation — all model code runs locally via Pyodide. The first load takes around 10 seconds to initialise the runtime; subsequent calculations are fast.

Individual

Taxpayer Calculator

Simulate the WDT tax profile for a single taxpayer under Route C (equity-transfer mechanism). Set starting wealth, growth rate or historical return series, holding period, and declaration ratio α. The honest-declaration baseline (α = 1) is always shown alongside your chosen scenario.

National

Revenue Calculator

Aggregate WDT revenue across the full UK taxable wealth distribution — 10 wealth brackets, four return tiers, UK equity series 1947–2019. Set rate parameters, growth scenario, and SWF sizing. Modelled revenue is shown alongside current UK tax receipts for direct comparison.

Welfare

Labour Dividend Calculator

Purchasing power gain for a given salary under a mature WDT. Models full labour tax displacement (income tax and employee NICs removed from the payslip), VAT displacement, and SWF energy bill reduction. Employer NICs saving shown separately. 2025/26 tax rates; VAT and energy figures are illustrative and adjustable.