👇https://t.co/EJ2kO5v6cr pic.twitter.com/YqtoR3Pa93 — HM Revenue & Customs (@HMRCgovuk) September 29, 2025What's an HMRC tax code? The most common HMRC tax code is 1257L, which is based on the Personal Tax Allowance of £12,570 - this is the amount you can earn before you need to pay tax. How to check your tax code your tax codeYou can find your tax code:by checking your tax code for the current year online - you’ll need to sign in to or create an online account on gov.ukon the HMRC appon your payslipon a ‘Tax Code Notice’ letter from HMRC, if you get oneWondering if you’re paying the right Income Tax? #TaxCheck👉🏻 https://t.co/NHooSq9Flk pic.twitter.com/fJVSZmKvjm — Barter Durgan (@BarterDurgan) September 12, 2025If you check your tax code online or in the HMRC app, you can also:find your tax code for previous tax yearssign up for paperless notifications - this means HMRC will email you when your tax code changesCheck what your tax code meansYou can use the HMRC tax code checker to find out:what the numbers and letters in your tax code meanhow much tax you will paywhat you may need to do nextWhat the numbers mean in your HMRC tax codeThe numbers in your tax code tell your employer or pension provider how much tax-free income you get in that tax year. HMRC will contact your employer to correct your tax code and you will get any money you overpaid in tax in your next payslip.