UK Answers

How We Check Our Figures

People use our calculators for decisions about their pay, tax and homes, so accuracy matters more than anything else. This page explains how we keep our figures right. Last updated 8 October 2026.

Where our figures come from

  • Official sources first. Tax rates, thresholds and statutory payments come from GOV.UK, the Scottish and Welsh revenue authorities and the energy regulator Ofgem. Each page names its sources and links to them.
  • No guesses. If we cannot verify a figure from an official source, we either leave it out or say clearly that it is an estimate. For example, appliance running costs use typical consumption and say so.
  • Rules we are unsure about are flagged. Where law is under review, such as future State Pension ages, the page says so.

How we check the maths

  • Every calculator is tested against hand-worked examples before it is published, and the tests run again whenever a rate changes.
  • Pages that show the same figure, such as a tax rate, take it from a single source in our code, so the numbers on different pages cannot drift apart.
  • We check every internal link, page title and structured-data block automatically.

How often we update

  • Every April: we re-verify all tax, National Insurance, minimum wage and statutory payment figures for the new tax year.
  • Every quarter: we update the energy price cap when Ofgem announces it.
  • When the rules change: after a Budget or Government announcement, we update the affected pages.

Each page shows the date its figures were last checked.

Advertising and independence

UK Answers is funded by advertising. Advertisers have no say over our figures, and adverts are always labelled and kept separate from our content. We do not accept payment to change what a calculator says.

Corrections

If you think a figure is wrong, contact us with the page and the figure you expected. We check every report against the official source and correct confirmed errors promptly.

See also the terms and disclaimer and the full list of UK tax rates and allowances for 2026/27.