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payroll-taxAnswered

Why does a wrong UK tax code usually come from stale information rather than from HMRC randomly choosing numbers?

DP
Daniel Price
June 11, 2026 3,377 views 1 answer
UKtax codePAYEHMRC

Workers in the UK often look at a surprising tax code and assume HMRC has made an arbitrary mistake that payroll somehow has to live with. Please explain why wrong codes usually come from missing or outdated facts, why the online update route matters, and why the correction can still take a little time to appear on the payslip.

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