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Email: contact@taxcodecalc.co.uk. A person reads every message.

A rate or a rule looks out of date

Tell us the page and the figure and, if you have it, the link to the GOV.UK or HMRC page that says otherwise. Rates change each April and after each Budget; we read the source again, correct the parameter file and date the change.

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contact@taxcodecalc.co.uk

Updated on .

Tax codes 2026, read on HMRC’s payroll specification, GOV.UK and the rates for employers, last checked on