Not every tax investigation is the same. Understanding which type HMRC has opened can help you plan the right response.
🟩 Aspect Enquiry (Limited Scope)
- HMRC checks one specific part of your returnExample: VAT claim, rental income, expenses
- Typical timeline: 3–12 months
- Often resolved quickly with clear evidence
Good news: Early support usually keeps it simple and inexpensive.
🟥 Full Enquiry (Wide Scope)
- HMRC checks your entire tax position
- Can extend to multiple years and linked businesses
- Typical timeline: 12–36+ months
- Higher risk of penalties and Tribunal action
These cases require professional tax investigation help UK from the start.
⚠ When HMRC Suspects Fraud — COP9
- Fraud Investigation Service becomes involved
- You may be offered the Contractual Disclosure Facility (CDF)
- Legal privilege with a solicitor becomes essential
This is serious — don’t handle it alone.


