| Type of behaviour | Unprompted disclosure | Prompted by HMRC |
| Reasonable care | No penalty | No penalty |
| Careless | 0% to 30% | 15% to 30% |
| Deliberate | 20% to 70% | 35% to 70% |
| Deliberate and concealed | 30% to 100% | 50% to 100% |
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