Datgodiwch eich cod treth DU — canfyddwch beth mae'n ei olygu, pa Lwfans Personol mae'n ei roi i chi, ac a yw'n ymddangos yn gywir.
Find your tax code on your payslip, P60, or P45.
Rhowch eich cod treth
Dewch o hyd i'ch cod treth ar eich slip cyflog diweddaraf, P60, neu P45. Rhif 4-digid fel arfer wedi'i ddilyn gan lythyren, fel 1257L.
Gweler yr esboniad llawn
Mae'r gwiriwr yn datgodio eich cod, yn dangos eich Lwfans Personol effeithiol, ac yn esbonio pam efallai bod gennych y cod hwn.
Gwiriwch a yw'n ymddangos yn gywir
Os yw eich amgylchiadau yn awgrymu cod gwahanol, mae'r gwiriwr yn nodi problemau posibl ac yn cysylltu â manylion cyswllt HMRC.
Drawing income from more than one pension at the same time often triggers an emergency tax code on the second and later pensions. How to fix it, and claim back any overpaid tax, in 2026/27.
What actually happens to your P45, P60 and P11D when you change jobs partway through the tax year, and how to make sure your new employer applies the right tax code from day one in 2026/27.
A BR tax code on your second job isn't necessarily wrong, but it isn't always right either. How Personal Allowance splitting across two employments actually works in 2026/27.
Disclaimer: All results are estimates for guidance only and do not constitute financial, tax or legal advice. Always consult a qualified professional.