About SoloCalc
SoloCalc builds simple, transparent calculators for people who work for themselves in the UK. Every tool is free to use without an account.
Where our figures come from
Rates and thresholds are taken from HMRC and GOV.UK publications and stored per tax year, so each figure can be checked. Where a future year's figure hasn't been confirmed, we say so on the page.
Tax figures last reviewed: 23 October 2026.
Limits of our estimates
Our calculators give estimates for planning. They don't know your full circumstances and are not tax, accounting or financial advice. For decisions that matter, speak to a qualified accountant or check with HMRC.