Self Assessment Scams: How to Spot and Avoid Fake HMRC Messages

Self Assessment scams are a growing concern for UK taxpayers, particularly around Self Assessment deadlines when people are more likely to expect communication from HMRC. Fraudsters often send convincing emails, text messages or phone calls pretending to be from HMRC, attempting to steal personal information, banking details or money.

This Self Assessment scam warning guide explains how HMRC Self Assessment scams work, the most common types of fraudulent messages, how to identify Fake HMRC emails and messages, what HMRC will and will not ask for, and what steps you should take if you receive suspicious contact.

Why Self Assessment Scams Increase Around Tax Deadlines

Self Assessment deadlines create an opportunity for criminals because taxpayers are already thinking about tax returns, payments and possible refunds. Fraudsters use this timing to make fake messages appear more believable. This period also tends to coincide with genuine HMRC correspondence about return errors or queries, so it’s worth knowing the common Self Assessment mistakes to avoid, which can help you recognise legitimate HMRC contact rather than mistaking it for a scam, or vice versa. Our fuller list of the 10 biggest mistakes people make in Self-Assessments covers the specific errors that most often prompt a genuine follow-up from HMRC.

Common scam messages may claim that:

• You are due a tax refund.
• You have unpaid tax that requires immediate payment.
• Your HMRC account has been suspended.
• Your personal details need to be confirmed.
• You could face penalties or legal action unless you respond quickly.

These messages are designed to create urgency and encourage people to act without checking whether the communication is genuine.

Common HMRC Self Assessment Scams to Watch Out For

HMRC Self Assessment scams usually follow a small number of common patterns. Understanding these approaches can help you identify suspicious contact before taking action.

Fake Tax Refund Messages

One of the most common HMRC tax scams involves fraudsters claiming that you are entitled to a tax refund. The message may ask you to provide bank details, card information or personal information so that the refund can supposedly be processed.

HMRC does not ask taxpayers to provide confidential banking details through unexpected emails or text messages.

Fake Payment Demands

Some scammers pretend to be HMRC and claim that you have unpaid tax that must be paid immediately. These messages may include threats of arrest, legal action or additional penalties if payment is not made. Genuine unpaid tax does accrue interest over time you can check the current rules on late tax payment interest but HMRC will never pressure you into paying through urgent links or unusual payment methods to avoid it.

HMRC will not demand immediate payment through suspicious links, gift cards, cryptocurrency payments or unusual payment methods.

Fake Account Security Messages

Another common scam involves messages claiming that your HMRC account has been compromised or suspended. The fraudster may provide a link asking you to verify your identity or update your account details.

These links often lead to fake websites designed to collect your Government Gateway login details.

How Fake HMRC Emails and Messages Usually Appear

Fake HMRC emails and messages can look professional and may include HMRC logos, official-looking reference numbers and realistic wording. However, there are usually warning signs that indicate the message may not be genuine.

Scams commonly arrive through:

• Email messages containing links or attachments.
• Text messages requesting urgent action.
• Phone calls claiming to be from HMRC representatives.
• Messages directing you to websites that look similar to GOV.UK.

How to Identify Genuine HMRC Contact

Knowing how HMRC communicates can help you avoid Self Assessment scams.

HMRC will not:

• Ask for your full password, PIN or banking security details by email or text.
• Ask you to transfer money urgently to secure your account.
• Threaten immediate arrest through a message.
• Ask you to click suspicious links to receive a refund.

If you receive unexpected contact claiming to be from HMRC, do not use the links or phone numbers provided in the message. Instead, access your HMRC online account directly through the official GOV.UK website.

What Should You Do If You Receive a Suspicious HMRC Message?

If you receive a message that appears to be an HMRC scam, avoid responding immediately and follow these steps:

1. Do not click links or open attachments.
2. Do not provide personal, banking or login information.
3. Check your HMRC online account separately.
4. Report suspicious messages to HMRC.
5. Delete the message once it has been reported.

How to Report HMRC Tax Scams

If you receive suspected HMRC tax scams, you can report them to HMRC so they can investigate and help prevent others from becoming victims.

• Suspicious emails can be forwarded to HMRC’s phishing reporting service.
• Suspicious text messages can be reported using HMRC’s text reporting service.
• Fraud resulting in financial loss should be reported to Action Fraud.

Reporting scams helps HMRC identify fraudulent campaigns and remove malicious websites or communication channels where possible.

Why Staying Alert Against Self Assessment Scams Matters

Criminals often rely on urgency and fear to pressure taxpayers into making quick decisions. This is why remaining cautious is particularly important during busy Self Assessment periods.

Taking a few extra moments to verify unexpected communication can help protect your personal information, financial details and HMRC account.

HMRC Guidance on Tax Scams

HMRC provides guidance on recognising, avoiding and reporting suspicious messages relating to tax. Reviewing the latest guidance can help taxpayers understand current scam methods and the warning signs to look out for.

Have You Received a Suspicious Self Assessment Message?

If you are unsure whether a message claiming to be from HMRC is genuine, avoid responding until you have verified it through official channels. Reporting suspicious contact can help protect both yourself and other taxpayers from similar scams.

At CIGMA Accounting, we help individuals and businesses understand their tax responsibilities, respond appropriately to HMRC communications and identify potential issues before they become larger problems. Our guide to personal tax in the UK also explains the wider HMRC obligations individuals may need to manage alongside Self Assessment. Our team supports clients across London, including Fulham Broadway and surrounding areas such as Munster Village and Fulham Reach, with practical tax guidance and compliance support.

Self Assessment Scams Case Study

Michael, a self-employed graphic designer, visited our Wimbledon office after receiving a text message claiming he was due a large tax refund. The message looked genuine, included HMRC branding and urged him to click a link immediately to confirm his bank details. Unsure whether it was legitimate, he decided to seek advice before responding.

We explained that Self Assessment scams often increase around tax return deadlines because fraudsters know taxpayers are expecting communication from HMRC. We showed Michael how to identify fake HMRC emails and messages, including unexpected refund offers, urgent payment demands, suspicious website links and requests for passwords or banking information. We also reminded him that HMRC will never ask for sensitive security details by text message or email.

During the conversation, Michael mentioned he had recently submitted his Self Assessment return and was waiting to hear from HMRC. We explained that the safest approach is to check any updates by signing in directly to his HMRC Personal Tax Account through the official GOV.UK website rather than following links in unexpected messages. This simple habit greatly reduces the risk of becoming a victim of phishing scams.

By the end of the meeting, Michael understood that recognising HMRC Self Assessment scams is just as important as filing an accurate tax return. Staying alert, verifying communications through official channels and protecting Government Gateway credentials can help safeguard both personal information and tax records.

Final Thoughts on Self Assessment Scam Warning

Being aware of Self Assessment scams is one of the best ways to protect yourself from fraud. Genuine HMRC communication follows specific processes, and unexpected requests for passwords, banking details or urgent payments should always be treated with caution.

Understanding common HMRC Self Assessment scams and knowing how to identify Fake HMRC emails and messages can help you stay safe while managing your tax affairs.