Free Tools

Practical UK calculators we built to answer the questions clients ask us most — about tax bills, take-home pay and whether earning more actually leaves you better off. Free, no sign-up.

UK Self Assessment

TaxShock

Estimate your Self Assessment bill, understand payments on account, and stop the January tax shock.

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Effective tax rates

Household Income Strategy

Model salary, overtime, pension and childcare across both adults to find the smartest way to earn more and keep more.

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Frequently Asked Questions

Answers to the questions UK founders ask us most.