About Cash Maths

Cash Maths is a small independent site that builds free calculators for everyday UK money questions: what you take home, what a house purchase will cost in stamp duty, and what a loan really costs.

How we work

• We show our workings. Every calculator lists the rates and assumptions behind its answer, with the tax year.
• We check the source. Figures are checked against GOV.UK and other official publications, and each page shows when it was last reviewed.
• We keep your data private. Calculators run entirely in your browser. What you type is not sent to us.
• We are upfront about money. The site may carry advertising and affiliate links. Where it does, they are labelled, and they never change the results.

What we are not

Cash Maths is not a financial adviser, tax adviser or lender, and it is not authorised or regulated by the Financial Conduct Authority. Our calculators give estimates for general information. For advice on your own circumstances, speak to a qualified professional.

Spotted a mistake?

Tax rules change. If a figure looks out of date or wrong, please tell us and we will review it.