2026/27 Tax Year
What Tax Code Should I Be On?
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By Rasika F.
Updated July 2026 • PayToolkit
Quick Answer
Most people with one job and no other income should be on 1257L, which gives the standard £12,570 tax-free Personal Allowance. If your code looks different, it may still be correct — but it's worth checking against your actual circumstances.
The Standard Code: 1257L
1257L reflects the standard £12,570 Personal Allowance for 2026/27. The number (1257) represents the allowance divided by 10, and the letter L means you're entitled to the standard tax-free allowance with no adjustments.
What the Letters Mean
- L — standard tax-free Personal Allowance
- BR — all income taxed at the basic rate (20%), no allowance applied — common on a second job
- D0 — all income taxed at the higher rate (40%)
- D1 — all income taxed at the additional rate (45%)
- K — used when deductions (like benefits in kind or previous underpayments) exceed your allowance
- M / N — Marriage Allowance received or transferred
- 0T — no allowance given, often a temporary code pending more information
Signs Your Code Might Be Wrong
- Your take-home pay changed noticeably with no change in salary
- You started a new job and are still on an emergency code weeks later
- You have a company benefit (car, medical insurance) that isn't reflected
- You've had more than one job or a change in circumstances HMRC may not know about
How to Fix an Incorrect Code
Check your code using your online Personal Tax Account or the HMRC app, compare it to your circumstances, and contact HMRC if it looks wrong. HMRC will issue a correction to your employer, and any tax overpaid is usually refunded automatically through payroll or as a rebate.
Frequently Asked Questions
What is the standard tax code for 2026/27?
1257L for most people with one job and no other income or deductions.
How do I know if my tax code is wrong?
Signs include an unexplained change in take-home pay, an unfamiliar code, or staying on an emergency code too long after starting a job.
What does an emergency tax code look like?
Usually 1257L W1, 1257L M1, or 1257L X — the standard allowance applied on a non-cumulative basis.
How do I fix an incorrect tax code?
Contact HMRC via your Personal Tax Account, the HMRC app, or by phone. They'll issue a corrected code and refund any overpaid tax.
Can my employer change my tax code?
No — only HMRC can issue or change a tax code. Employers just apply whatever code HMRC provides.