Over 11.5 million people met the 31 January 2025 self-assessment deadline, but 1.1 million taxpayers missed it. If you're one of them, expect a £100 penalty. Learn about late fees and HMRC’s payment plan options to avoid further charges.

There are an estimated 1.1 million taxpayers that missed the deadline. Are you among those that missed the 31 January 2025 filing deadline for your 2023-24 self-assessment returns?

If you have missed the filing deadline then you will usually be charged a £100 fixed penalty if your return is up to 3 months late, regardless of whether you owed tax or not. If you do not file and pay before 1 May 2025 then you will face further penalties unless you have arranged to pay with HMRC.

If you are unable to pay your tax bill, there is an option to set up an online time to pay payment plan to spread the cost of tax due on 31 January 2025 for up to 12 months. This option is available for debts up to £30,000 and the payment plan needs to be set up no later than 60 days after the due date of a debt.

If you owe self-assessment tax payments of over £30,000 or need longer than 12 months to pay in full, you can still apply to set up a time to pay arrangement with HMRC, but this cannot be done using the online service.