What Happens If You Don’t Submit Your Tax Return?

If you are required to file a Self Assessment tax return but miss the deadline, HMRC may charge penalties even if you have no tax to pay. The initial late filing penalty is £100, and additional penalties can apply if the return remains outstanding.

Interest will also be charged on any unpaid tax, and further late payment penalties may be added depending on how long the tax remains unpaid. The longer the delay, the higher the total amount you may owe.

If you believe you no longer need to submit a tax return, you should inform HMRC as soon as possible rather than simply ignoring the filing deadline.

Submitting your tax return on time helps you avoid unnecessary penalties, interest, and stress.