Wage1131N Tax Code — What It Means
Marriage Allowance: you have transferred a tenth of your Personal Allowance to your partner, so your tax-free amount is smaller than the standard code.
How 1131N changes your pay on a £30,000 salary
| Code | Income tax / year | Per month | Take-home / month* |
|---|---|---|---|
| Standard 1257L | £3,486 | £291 | £2,210 |
| 1131N | £3,738 | £312 | £2,189 |
*Take-home per month here reflects income tax only; National Insurance and any student loan or pension are separate.
Why you might have the 1131N code
- You earn below the Personal Allowance and gave part of it to your higher-earning partner.
- You applied for Marriage Allowance as the lower-earning partner.
- HMRC reduced your allowance to reflect the transfer to your partner.
How to fix a wrong code
If you no longer want to transfer your allowance, or your circumstances change, you can cancel Marriage Allowance through HMRC.
Related codes: 1383M · 1257L · S1257L · All tax codes
General information, not advice. Estimates assume the standard 1257L tax code and typical circumstances; your payslip may differ by a pound or two because HMRC payroll software truncates at each step. Verify with HMRC or an accountant for any decision. WageReckon stores no salary data - the calculators run in your browser.
Rates for the 2026-27 tax year, current as of 24 July 2026. Source: HMRC (gov.uk). Contains public sector information licensed under the Open Government Licence v3.0. Source: HMRC / gov.uk. See how we calculate.