1257M tax code
Standard personal allowance plus 10% Marriage Allowance transferred from a partner (total ~£13,830).
Approx. personal allowance equivalent: £13,830 per year
What this code means in practice
This code corresponds to roughly £13,830 of tax-free pay per year.
Your partner has transferred 10% of their unused Personal Allowance to you under Marriage Allowance.
Check your take-home pay
Enter code 1257M in our tax code checker or model a full salary with our salary calculator. Compare the result with your payslip to spot overpayment early.
Related reading
Frequently asked questions
What does tax code 1257M mean?
Standard personal allowance plus 10% Marriage Allowance transferred from a partner (total ~£13,830).
Is 1257M an emergency tax code?
1257M is not flagged as an emergency code in our database, but you should still verify it matches your circumstances in HMRC's Personal Tax Account.
How do I change my tax code?
Update your employment details in your Personal Tax Account at gov.uk, give your employer a P45 when changing jobs, or call HMRC on 0300 200 3300. Your employer applies the new code once HMRC issues it.
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.