Answers · UK 2025/26

How do I check if my tax code is correct after a pay rise?

A standard cumulative tax code such as 1257L automatically applies correctly to a pay rise without needing any manual update, since your Personal Allowance is simply spread across the year regardless of how much you earn. Check your payslip shows the expected code, use HMRC's online tax checker or personal tax account to confirm your estimated annual income and code are accurate, and query anything that looks wrong promptly.

Last updated: 3 July 2026Last reviewed: 3 July 2026How we verify

Full answer

For most people on a standard cumulative tax code, such as 1257L, a pay rise does not require your tax code to change at all -- the code simply represents your annual tax-free Personal Allowance, and the cumulative PAYE system automatically calculates the correct tax on each payment based on your total taxable pay so far in the year, adjusting smoothly as your salary increases. However, there are a few situations where it is worth double-checking your code after a pay rise. First, confirm your tax code on your latest payslip still shows the code you expect (1257L for most basic-rate and lower higher-rate taxpayers in 2026/27), rather than an emergency, BR, D0 or other non-standard code that may have been applied in error. Second, if your pay rise takes your total income above £100,000, your Personal Allowance should begin tapering, and HMRC may issue you a revised, lower numerical code (such as 757L or similar, depending on the exact reduction) once they become aware of your new higher salary, usually based on information your employer submits through Real Time Information (RTI) each pay period -- if this has not happened and you expect to cross £100,000, you may need to proactively update your estimated income via your personal tax account to avoid a large underpayment being collected later. Third, if a pay rise pushes you into or further through the higher-rate band, this does not require a code change either, since the cumulative system handles multiple tax bands automatically -- but it is worth checking your payslip year-to-date figures periodically to confirm the maths looks right, and using HMRC's online "check your Income Tax" tool if anything seems off.