Have you received a letter from HMRC’s Fraud Investigation Service?
HMRC’s Fraud Investigation Service (FIS) conducts civil and criminal investigations across all areas of tax, and is staffed by many of HMRC’s most able and experienced investigators.
The unit was part of the former HM Inland Revenue and consisted of investigators who conducted civil and criminal investigations. With the formation of HMRC, the civil and criminal investigations teams were split into two distinct units (Criminal Investigations and Special Civil Investigations). These units were remerged in 2015 to create FIS. As a result of HMRC’s failure to undertake successful prosecutions where there was evidence of fraud or deliberate behaviour or dishonest conduct involving large sums of money.
For Civil Investigations, the main areas FIS is well known for are enquiries conducted under:
- Code of Practice 8 - which involves bespoke tax avoidance and/or where COP9 is not considered appropriate.
- Code of Practice 9 - where fraud or deliberate behaviour or dishonesty is suspected and may involve a large amount of tax.
Regardless of which Code of Practice is issued, it is a potentially serious issue for FIS to be involved and appropriate specialist professional advice is highly recommended.
HMRC’s COP9 leaflet strongly recommends a person seeks independent professional advice.
FIS has since increased staff numbers and expanded its remit in response to areas that HMRC believes to be experiencing large losses of tax take and now includes:
- The Labour Providers Team
- Insolvency Team
- VAT fraud Team
- Inland Detection (fuel duty, alcohol and tobacco duty)
- R&D Team
Our Tax Investigations and Dispute Resolution team includes a number of former HMRC FIS investigators with extensive experience of handling FIS investigations, in both HMRC and private practice.
Get in touch with one of our tax investigations experts today for a free, confidential consultation.

