Numbiqo makes useful calculations free and easy to understand. Our first collection covers UK tax, money, everyday maths, business and dates.
How our calculators work
Every tool has a formula, a worked example and clear assumptions. Calculations run in your browser; the values you enter are not sent to our servers. Financial estimates use full precision internally, with rounding at display.
UK rate information
UK tax tools use published official guidance for 2026/27, checked on 23 September 2026. Each tool links to its sources. Numbiqo is independent and is not affiliated with HMRC or any government body.
What a result can tell you
Results help you explore a scenario. They are not quotes, lending decisions, payroll records or personalised financial advice. Always read the assumptions on the calculator page.
Keeping results dependable
The project includes automated calculation tests covering examples, important thresholds, invalid inputs and zero-interest cases. Tax rules and personal circumstances can still change the right answer. Check the official source before acting on a tax estimate.