What does tax code 1257L mean?

Tax code 1257L is used by your employer or pension provider to calculate how much Income Tax to deduct from each payslip. Earn £12,570 tax-free.

How HMRC decides your tax code

HMRC assigns your tax code based on the information they hold: your forecast income, any taxable benefits (company car, private healthcare), Marriage Allowance transfers, and any tax you've under- or over-paid in previous years. If your circumstances change — a pay rise, a new job, a benefit added or removed — HMRC will issue a revised code, usually as a P2 "PAYE Coding Notice" letter or online via your Personal Tax Account.

What to do if you think 1257L is wrong

Tax codes are surprisingly often wrong, especially after a job change or when a second income starts. If you suspect the code on your payslip doesn't match your situation:

1. Log in to your Personal Tax Account on gov.uk to see the code HMRC currently has on file.
2. Cross-check it against the official tax code list.
3. If it's wrong, update the relevant details in your Personal Tax Account or call HMRC on 0300 200 3300. Resolution usually takes 1–4 weeks.
4. Once HMRC issues the correct code, your employer will use it on your next pay run, and any overpaid tax from the current tax year is refunded through PAYE automatically.

See what you actually take home

The tax code only tells you how the Personal Allowance is being applied. To see the bottom-line monthly take-home for your salary, use the calculator — it accepts every UK tax code, plus student loans, pensions, bonuses, and Scottish bands.

Other common UK tax codes

This is a general explanation of how UK tax codes work for the 2026/27 tax year. Your individual code may include suffixes (W1/M1/X for emergency codes), prefixes for Scotland (S) or Wales (C), or adjustments for benefits in kind. Always check your latest P2 from HMRC for the authoritative version of your code.