Income Tax and PAYE Guides
Income tax is charged on earnings from employment and self-employment. PAYE is how most employees pay it through payroll. These guides cover the personal allowance, tax codes, marriage allowance, self-employment and Self Assessment for 2026-27.
- Self Assessment Deadline UK 2027: Every Date and Penalty
Self Assessment deadlines for 2026-27: paper return 31 October 2026, online 31 January 2027, and every penalty explained.
- UK Tax Codes Explained: 1257L, BR, K, M, NT and Suffixes
What every UK tax code means, from 1257L to K codes and emergency codes, and how to fix a wrong one.
- Marriage Allowance UK: Claim £252 and Backdate 4 Years
How to transfer £1,260 of personal allowance, save up to £252 a year, and backdate a Marriage Allowance claim.
- Personal Tax Account UK
What the HMRC personal tax account does, how to sign in, and what you can check and change.
- Personal Allowance UK 2026-27: £12,570 Tax-Free
The UK personal allowance is £12,570 for 2026-27. How it works, the £100,000 taper, and marriage allowance.
- Self-Employed Tax UK: What You Pay and When
Income tax and Class 4 National Insurance for the self-employed in 2026-27, plus deadlines and allowable expenses.