HMRC has published guidance on “Ten things a promoter of tax avoidance schemes won’t always tell you”

1. Most schemes don’t work
2. It could cost you more than you bargained for
3. You may have significant legal fees to pay
4. You could face criminal conviction
5. You could face publicity as a tax avoider
6. Your scheme is never HMRC approved
7. You could be marked out as a high-risk taxpayer
8. HMRC is likely to beat your scheme in court
9. The risk is normally all your own
10. You’ll have to pay the tax up front anyway