UK Tax Codes Explained 2026/27

Understanding UK tax codes. What your tax code means and how it affects your take-home pay in 2026/27.

Common UK Tax Codes

• 1257L — Standard code for 2026/27. You receive the full £12,570 personal allowance.
• BR — All income taxed at 20% basic rate (often used for a second job).
• D0 — All income taxed at 40% higher rate (second income source).
• K — You owe tax, so your effective allowance is negative.
• M / N — Marriage Allowance transferred to/from a spouse.
• W1 / M1 — Emergency tax codes applied on a non-cumulative basis.

Contact HMRC or check your Personal Tax Account if you think your tax code is wrong.