Self Assessment scam warning

HM Revenue & Customs (HMRC) is reminding Self Assessment customers to be alert to potential scams and fraudsters.

HMRC is calling on Self Assessment customers to remain vigilant as scam attempts continue. Scammers often impersonate HMRC, offering fake refunds or demanding urgent payments to steal personal and banking information. They may say it’s safe to share personal details. It’s not.

Never share secure information

Passwords, usernames, and access codes are private, and customers should never share them, even with someone they trust or who helps them with their taxes.

File your tax return early

Filing early can also help customers spot scams more easily, as those who have already submitted their tax return are less likely to be caught off guard by scam attempts closer to the Self Assessment 31 January 2026 deadline.

How to spot a Self Assessment scam

HMRC will never:

• leave voicemails threatening legal action or arrest
• ask for personal or financial information via text message or email
• contact customers by email, text, or phone to inform them about a refund or ask them to claim one. 

Anyone due a refund can claim it securely via their HMRC online account or via the free HMRC app.

What to do if you suspect a Self Assessment scam

An unexpected contact claiming to be from HMRC should be viewed as suspicious. Take your time and check HMRC's scam advice on how to identify tax scam phone calls, emails, and text messages.

You can report any suspicious communications to HMRC by:

• forwarding emails to phishing@hmrc.gov.uk
• reporting tax scam phone calls to HMRC
• forwarding suspicious texts claiming to be from HMRC to 60599

File your Self Assessment tax return

If you need to file a Self Assessment tax return for the 2024 to 2025 tax year, you must do so and pay the tax you owe by the deadline of midnight on Saturday 31 January 2026.

File your Self Assessment tax return and pay your tax bill by 31 January 2026.

First published 21 August 2025