United Kingdom how-to guides

Researched walkthroughs for United Kingdom forms and slips. Open United Kingdom take-home.

Tax code

UK tax codes explained

What your PAYE tax code means — 1257L, BR, 0T, Scottish/Welsh letters, and emergency W1/M1/X — plus where to find it and how it affects take-home.

Tax code

How to check your tax code

Where to see your UK tax code (HMRC online, app, payslip, notice), how to check Income Tax for 2026–27, and what to do if it looks wrong — official GOV.UK links only.

P11D

What is a P11D?

What a P11D is, when employers report benefits in kind to HMRC, how payrolling changes things, and how to get your copy — employee explainer with GOV.UK links.