Estimate HMRC penalties and interest for a late Self Assessment return and payment.
Penalties stack as time passes. The timeline below shows how the total grows the longer you wait - file and pay as soon as you can.
Penalty milestones
Estimate for individual Self Assessment. Daily penalties, interest and special cases vary - check gov.uk. Not advice.
Estimated penalties & interest
on top of of tax owed
What this costs you
extra to pay
on top of your tax
Wait until you cross the next milestone and this estimate rises to .
File and pay as soon as possible - penalties and interest keep growing.
Estimated extra cost (penalties and interest) for of tax owed, at each lateness stage.
| Lateness | Filing | Payment | Interest | Extra total |
|---|---|---|---|---|
Your current selection is highlighted. Figures are estimates and assume the tax stays unpaid throughout each stage.
| Scenario | Penalties + interest | Total to pay | |
|---|---|---|---|
Self Assessment Penalty Calculator by TaxFly — free UK tax calculators