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, which also connects to HMRC to file your VAT and Self Assessment returns directly under Making Tax Digital.

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 2026/27 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.