Fake HMRC National Insurance Suspension Scam
Criminals call UK residents impersonating HMRC officers, claiming their National Insurance number has been suspended due to suspicious activity and that immediate payment is required to reinstate it. HMRC cannot suspend National Insurance numbers and never demands payment by phone to resolve such issues.
Part of: Fake Social Security Scams
Last reviewed: 7 June 2026
In the UK, the National Insurance number functions similarly to the Social Security number in the US — it is a permanent personal tax identifier used throughout a person's working life. Scammers adapted the 'suspended government number' script from the US to the UK, replacing SSN with NI number and the SSA with HMRC.
The scam works by exploiting the authority of HMRC combined with the panic of learning that a core identity document has been 'compromised.' Victims are told that criminal activity has been linked to their NI number and that unless they take immediate action — often including payment of a 'security bond' — the number will be suspended and their benefits and tax position will be frozen.
HMRC is explicit in its public guidance: it does not call to say a National Insurance number has been suspended, it does not threaten immediate legal action in unsolicited cold calls, and it does not accept payment by gift card, wire transfer, or cryptocurrency.
How this scam works on the HMRC brand
A robocall or live caller claims to be from 'HMRC National Insurance Investigations' and states that the victim's NI number was linked to financial crimes. They instruct the victim to call back on a given number or stay on the line while a 'case file' is prepared, then demand payment to 'secure' or 'reinstate' the NI number.
Some callers claim to work with the National Crime Agency (NCA) or HMRC Fraud Investigation Service (FIS), naming real UK law enforcement bodies to add authority. Real NCA and FIS investigations do not begin with cold calls demanding gift card payment.
Email variants claim an 'HMRC National Insurance Review' has been initiated and include a link to a fake HMRC portal requesting NI number, date of birth, and banking information.
Common red flags
- Caller claims your National Insurance number has been suspended or flagged
- Immediate payment or gift card purchase demanded to restore the NI number
- Caller references the NCA or HMRC FIS but cannot provide verifiable case details
- No prior written correspondence from HMRC about any issue
- Urgency: 'NI number suspended within 24 hours unless action taken'
- Email link goes to a non-gov.uk domain
- Caller insists you must not hang up or call anyone else while the 'case is live'
How to protect yourself
- Hang up and independently call HMRC on 0300 200 3300 to check your actual status
- Know that NI numbers cannot be suspended — any caller claiming this is running a scam
- Log in to your Personal Tax Account at gov.uk to verify your NI and tax position
- Forward suspicious HMRC emails to [email protected]
- Report the call to Action Fraud
How to report it
- Report to Action Fraud at actionfraud.police.uk or 0300 123 2040
- Forward phishing emails to [email protected]
- Report suspicious texts to 60599
- Report to the NCSC at report.ncsc.gov.uk
- If money was paid, contact your bank and report to Action Fraud immediately
Frequently asked questions
Can HMRC suspend a National Insurance number?
No. National Insurance numbers are permanent identifiers and cannot be suspended. Any caller claiming otherwise is fraudulent.
Does HMRC work with the NCA on National Insurance fraud?
HMRC and the NCA do collaborate on serious cases, but not through cold calls demanding gift card payment. Real investigations follow established legal processes with formal written communication.
What should I do if I gave personal details to the caller?
Report to Action Fraud, contact HMRC on 0300 200 3300 to flag potential misuse of your NI number, and monitor your tax account and bank accounts for unusual activity.