When is the deadline for Self Assessment tax returns?

31 January 2024 – 4 Minute Read

HMRC tax forms and calculator

Do you earn untaxed income? If so, you must complete a Self Assessment tax return every year. But when exactly is the deadline for the 2022 to 2023 tax year?

In the UK, more than 10 million people file tax returns each year. A large portion of that group leaves dealing with it all to the last minute. This can cause all sorts of problems, so it’s best to think ahead.

Whether you’re filing yourself or you’ve hired an accountant, you need to know all the key tax year dates. The most important of these is the final deadline for Self Assessment tax returns – but this date can change depending on your circumstances.

Who needs to submit a tax return?

If you fit any of these profiles during the previous tax year, start preparing now.

  • You were self-employed as a sole trader and earned in excess of £1000.
  • You earned more than £100,000.
  • You earned untaxed income (tips, commission, rental income, and so on).

There are many other situations where you might need to file a Self Assessment tax return – so keeping up with rule changes is a must.

When do tax years start and end?

Every tax year is 12 months long, but they don’t start in January and end in December, as you might expect.

Instead, tax years run from 6 April to 5 April. Accordingly, the 2022 to 2023 tax year ran from 6 April 2022 to 5 April 2023.

This has been the standard format since the 19th century, so don’t expect it to change anytime soon.

When is the Self Assessment tax return deadline?

There are actually several deadlines that you should know if you need to file a tax return for the 2022 to 2023 tax year.

Registering for Self Assessment

If you have never filed a Self Assessment tax return before (or if you did not submit one for the previous tax year), you’ll need to let HM Revenue and Customs (HMRC) know that you will be.

The deadline for this is 5 October 2023 .

Submitting a paper tax return

Most people do their tax returns online, but if you plan on submitting a paper tax return, the deadline changes.

You must file any paper tax returns by 31 October 2023 .

Tax returns using PAYE

If you are both employed and self-employed, it might be possible to pay any further taxes you owe via PAYE.

If that’s what you’d prefer, you must file your return by 30 December 2023 .

Submitting an online return

This is the date that applies to most people.

If you are submitting an online tax return, you must complete it by 31 January 2024 .

When is the deadline for paying the tax you owe?

Some people are surprised to learn that the deadline for paying your taxes is the same as the online Self Assessment deadline – 31 January 2024 .

This is just one reason why it’s good to get your return filed well before this date rolls around.

Most people also pay their National Insurance at the same time. There are several ways to pay, including weekly and monthly payments. And if you’re struggling to come up with the money on time, HMRC can help .

There are some specific situations where the payment deadline is different. If your circumstances are more complex, you might consider getting help from a local accountant.

What happens if you miss the deadline?

If you forget about these important deadlines, you might end up paying a fine for your trouble.

When you file your return up to three months late, you can expect to pay a £100 fine. The longer you fail to pay, the larger the fine becomes.

They’ll also charge you interest on any late payments.

How to make sure you file your tax return on time

When you file your returns too slowly – or don’t do them at all – you pay increasingly steep penalties. Besides hurting your bank balance, this also causes lots of stress.

Here are a few simple tips for keeping ahead of problems:

  • Start early

The earlier you start dealing with your taxes, the easier it will be. You’ll have more time to gather information and complete the return.

  • Keep good records

You’ll find returns simpler if you keep clear records of your income and expenses from throughout the past tax year. If it’s too late for the most recent year, bear this in mind for the future.

  • Get help (if you need it)

If you’re struggling with filing your return, there’s nothing wrong with getting professional help. Finding an accountant who can handle your taxes makes it a much less stressful experience.

Act now by preparing for tax season

You might dread dealing with your tax return, but it doesn’t have to be painful. If you prepare ahead of time and keep an eye on the important filing dates, everything should go smoothly.

Remember, if you’d prefer for someone else to handle your taxes, you have options. Chartered accountants can tackle any Self Assessment return with ease.

Make choosing a quality accounting service simple – browse the top accountants near you today.