A tax code tells your employer how much tax to take. Gov.uk explains common codes.
If it looks wrong
Check with HMRC. A wrong code can mean you pay too much or too little.
Sources
Last checked 22 Oct 2026. Rules change, so confirm on gov.uk.
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General information only. This page does not say whether you qualify for anything, and rules change, so check the linked gov.uk pages. For advice on your own case, use an IAA-registered adviser or a solicitor.