Nations Tax Calculator: take-home pay with a receipt attached

Field notes

The calculator applies country-specific rules to a salary and exposes the arithmetic line by line. The United Kingdom example separates income tax from National Insurance, accounts for personal-allowance tapering, and identifies five underlying rules with source documents and read dates. Its comparison uses each jurisdiction's published average full-time wage in local currency rather than converting salaries, and labels income-tax-only models separately. The site also indexes 69 records, including 13 jurisdiction pages, 10 guides, six rules, and two corrections.