Missed The Tax Return Deadline? Don’t Bury Your Head In The Sand…

The clock has finally ticked over 23:59 on 31st January. Some spent the arrival of February with their Self Assessment tax return submitted far in advance. Others were exhausted after rushing to file it. And a…

5 Minute Read

Last Updated: 8th February 2024

The clock has finally ticked over 23:59 on 31st January. Some spent the arrival of February with their Self Assessment tax return submitted far in advance. Others were exhausted after rushing to file it. And a few will have missed the deadline entirely.

If you’re in the latter group, don’t be tempted to bury your head in the sand. Nothing is gained with avoidance – in fact, any tax anxiety will just last longer. Here, we offer some guidance on how to deal with the situation.

Know the rules regarding penalties

Even a submission that’s a millisecond late results in a £100 penalty. And this isn’t the only one. If you continue to delay filing your tax return, after 90 days HMRC move on to the second phase of penalisation: a £10 per day fine.

This stage lasts for a maximum of 90 days. After this, there is either a £300 penalty, or you’ll be fined 5% of the amount of tax owed – whichever is the greatest. If your Self Assessment still isn’t submitted by the time the next deadline comes around, this penalty will then be applied again.

The due date for paying any tax owed is also 31st January. There is a 30-day period after this date where you can pay it without any further penalty. Once this time period passes, you will be fined 5% interest on the amount due.

If you have a reason for not submitting your tax return on time, then you may be able to avoid a penalty. Just make sure it’s an acceptable explanation, rather than an unbelievable excuse. Also, be aware that the late payment penalty system is due to change.

Speed up the filing process

Many procrastinate when it comes to the Self Assessment because they believe it takes a considerable amount of time. But this isn’t the case at all – it can actually be done in minutes if you’re thoroughly organised.

Know the documents you’ll require, and gather them together before you begin the process. Having to continuously search for them will likely frustrate you, especially as HMRC signs you out of their online system after a certain time period.

You can also make submission swift by employing tax return software. This offers a variety of features that will get you to grips with how tax works, allowing you to spend the least amount of time possible on your Self Assessment.

Ensure you choose the right tax software

If you decide to use Self Assessment software, then make sure that you select tools that make the process as easy as possible. Ideally, it will have full functionality – providing you with the ability to capture expenses on your smartphone or even submit your tax return on this same device, for example.

Tax-saving suggestions are another fantastic feature – you’ll not need to figure out if you could reduce your liability, the software will tell you. Great tools also allow you to simply enter your data, and then do the sums for you in real time, adjusting the amount of tax due at any time of year.

Whilst you can’t turn back time to meet this year’s tax return deadline, you can ensure you meet next year’s by inputting your information throughout the coming 12 months. When the upcoming due date approaches, you’ll be able to quickly click submit, rather than experience stress.

GoSimpleTax has all the functionality you could ask for. Register for a free 14-day trial to sample the software. If it works for you, then you can sign up for an annual subscription to take advantage of every feature available.

Trusted by over 20,000 subscribers

You don't need to be an expert to complete your self assessment tax return.

Find Out More

Blog content is for information purposes and over time may become outdated, although we do strive to keep it current. It's written to help you understand your Tax's and is not to be relied upon as professional accounting, tax and legal advice due to differences in everyone's circumstances. For additional help please contact our support team or HMRC.

5 Excellent Reasons to Choose Us

Discover how to make tax returns a doddle...

Find out more

Do summer businesses pay tax?

07 Jun 2024

Summer’s here and the time is right for – making hay while the sun (hopefully) shines. This year perhaps you’re among the very many…

Top ten vehicle-related expenses sole traders can claim

05 Jun 2024

Many sole traders couldn’t run their business without having a vehicle. Tradespeople couldn’t travel to customers’ homes or premises, many businesses couldn’t pick up…

Non-domicile tax rules: what will change from April 2025?

02 May 2024

In March 2024, Jeremy Hunt announced in his spring budget speech that the government would scrap the UK’s current non-dom tax regime and replace…

How GoSimpleTax Works


Simply register for free with your full name and email address.

Select Your Income

Select the income you receive and follow the hints and tips for potential tax savings.

Validate Your Information

Validate your personal information and submit directly to HMRC to get confirmation in just seconds.


Work Anywhere, With Any Device

Gone are the days of fretting over a calculator surrounded by scraps of paper at the eleventh hour.

GoSimpleTax’s tax return software uses the information you upload in real time to calculate your income and expenditure, working out the tax you owe and sending you helpful notifications when there’s the possibility of a mistake.

Start your free trial

"The software is intuitive and proved very easy to navigate. I found the whole process refreshingly simple. I saved a lot of money too!"

Steve J.

Ordained Presbyter

"Easy to use and value for money. Everything you need to do your tax."

Gordon J.

Self Employed

"It fills in all the forms and sends them to the Inland Revenue. Not expensive either. Takes the stress out of doing your tax return online."

Ross G.

Team Rector

5 reasons to use GoSimpleTax >