Self-assessment Tax Return and Payment Deadline (for online returns)

January 31st is the deadline for self-assessment tax returns - if you’re completing an online tax return.

You’ll need to be completing a self-assessment tax return if you generated self-employed income for the last tax year (i.e. April 2023-April 2024).

If you started self-employment between April 6th 2023 and April 5th 2024, you’ll need to submit your first self-assessment tax return online by January 31st 2025.

Late filing and late payment can result in penalties, so it’s essential to keep these dates in your diary and be prepared ahead of the deadlines.

You can file your tax return at any time after the end of the tax year, and before the deadline - and it is sensible to get it completed and filed as early as possible.

If you’re unsure of how to complete your tax return, or this is the first time you’ve completed one, you may want to seek help from an accountant, or use an online service such as Crunch or Freeagent.

Most people will be completing their tax returns online. HMRC is slowly moving towards all self-assessment tax returns having to be submitted online as part of “Making Tax Digital”, and you’ll be required to submit your tax return online in the coming years.