Free UK tax calculators for real decisions

WeCalculate helps you estimate the numbers people actually search for — the £100k tax trap, trading allowance for Vinted sellers, payments on account, HICBC, VAT, dividends, Scotland vs rUK, CGT deadlines, MTD and pension annual allowance.

Not tax advice. Figures are estimates using published HMRC / GOV.UK rates for tax year 2026/27. Always check GOV.UK or a qualified adviser before filing or paying.

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Why these tools exist

Most people do not need a full tax engine. They need a clear answer to one awkward question: “Am I in the £100k trap?”, “Should I claim the trading allowance?”, “How big will January’s Self Assessment payment be?” WeCalculate focuses on those long-tail questions with transparent maths and links to official sources.

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