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GovMath.

DWP & HMRC rules · 2025/26

UK family & benefits calculators, in plain English

Estimate what you can claim from DWP and HMRC. No jargon, just plain answers.

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15 calculators

Benefits in plain English

The benefits system has dozens of rules, taper rates and earnings disregards. Our calculators strip away the jargon and show you roughly what you can claim — and what happens when your circumstances change.

These are estimates. For an official figure, you’ll need to apply through GOV.UK — but use these tools to check whether it’s worth your time first.