Free tools
Calculators for the self-employed
Free UK calculators for sole traders, freelancers and contractors — no signup needed. Built by the team behind FTrak.
HMRC Mileage Calculator
Work out your business mileage allowance at official HMRC rates for cars, motorcycles and bicycles.
Self-Assessment Tax Calculator
Estimate your Income Tax and National Insurance as a sole trader for the 2025/26 tax year.
Day Rate Take-Home Calculator
Turn a contract day rate into estimated annual and monthly take-home pay after tax.
VAT Calculator
Add or remove VAT at 20%, 5% or 0% and see net, VAT and gross figures instantly.