Poundsum is a free collection of UK money calculators and guides. We built it because simple questions, like what a job pays per hour or how much tax comes off a pay rise, are often answered with out-of-date figures or results that hide how they were worked out.
What we do
- Build calculators for UK pay, tax, mortgages, pensions and family money.
- Use only official figures from GOV.UK, HMRC, Revenue Scotland, the Welsh Revenue Authority and the Bank of England.
- Explain every calculation in plain English, with worked examples you can check by hand.
How we check our figures
Before a calculator goes live, we test it against worked examples from official guidance. We review every page at the start of each tax year on 6 April, when minimum wage rates change on 1 April, and whenever the government announces a change. Each page shows when it was last checked.
Your privacy
Our calculators run in your browser. The numbers you enter are not sent to us or stored. You can read more in our privacy policy.
Spotted a mistake?
We fix errors quickly. If something looks wrong, please contact us with the page and the figures you used, and we will check it and reply.
Important
Our tools give estimates for general information. They are not financial, tax or legal advice. Read the full disclaimer.