Last reviewed: July 2026 · Updated for the 2026/27 tax year
PayToolkit's calculators and guides are researched and written using official HMRC guidance, legislation, and published rate tables. Key calculators — including IR35, Corporation Tax, Director Salary vs Dividend, and Sole Trader Tax — are reviewed by a CIMA-qualified accountant working in UK practice, so the underlying logic has been checked by someone with a professional accounting qualification, not just built from rate tables alone.
We prioritise the calculations and questions UK taxpayers search for most — from take-home pay and Self Assessment to inheritance tax and stamp duty — and build tools that give a fast, accurate estimate without requiring a signup or a spreadsheet.
If a rate, threshold, or explanation is found to be inaccurate or out of date, we correct it as soon as possible after verification. See Methodology for our update process, or contact us to flag an issue.
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