Bonus tax
UK tax glossary · Last reviewed: April 2026
Bonuses are not taxed at a special flat rate by default — your employer uses your tax code. Large bonuses in one month can temporarily push effective deductions higher.
HMRC reconciles cumulative position over the year; overpayment may be refunded later.
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TaxHelper provides general information based on published HMRC rates and guidance. It is not regulated financial or tax advice. For decisions involving significant sums, complex circumstances, or if you are unsure, speak to a qualified accountant or HMRC directly.