Skip to main content
Free interactive tool

HMRC Letter Decoder

Got a letter from HMRC and not sure what it actually means? Search by code (P800, P2, SA250…) or topic and get a plain-English explanation, the deadline that matters, and the exact next step.

Search HMRC letters

Reality check: HMRC sometimes sends letters that look like demands but are routine notifications. The only authoritative source for whether you owe tax is your HMRC personal tax account at gov.uk/personal-tax-account. Never act on a letter you can’t reconcile with the account.

Spotting fake "HMRC" letters and texts

HMRC scams are extremely common. A real HMRC letter:

Report suspicious HMRC contact: forward emails to phishing@hmrc.gov.uk; forward texts to 60599. Full guidance: gov.uk — report HMRC scams.