Guides
Clear explanations that go with our tools.
Finance & Tax
How compound interest works
Why interest on interest makes balances grow faster over time, with the formula and a worked example.
4 October 2026Read guide
CalculatorsHow to calculate percentages
The four percentage calculations you will actually use, with formulas and worked examples.
4 October 2026Read guide
Finance & TaxHow VAT works in the UK
A plain-English explanation of UK VAT: the three rates, how to add and remove VAT, and where to check the official rules.
4 October 2026Read guide