What Happens if You Submit Your Self Assessment Late?
Table of Content
What are Self Assessment Deadlines?
What HMRC Does When You Miss the Deadline?
Late Payment Penalties and Interest Charges
What Happens If You Owe No Tax?
Payments on Account and the July Deadline
What to Do If You Cannot Pay Your Tax Bill?
Reasonable Excuses and Penalty Appeals
How to Avoid Submitting Late in the Future
30 Seconds Summary
- HMRC automatically fines you if your Self Assessment is late. This happens even if you don’t owe any tax.
- Late filing and late payment penalties increase the longer you wait, and interest is added to the unpaid tax.
- If you cannot pay your tax bill, you can arrange a Time to Pay plan with HMRC to avoid extra fines.
Many people think that submitting their Self Assessment late is not a big problem. They believe they can fix it later without any real trouble. In reality, HMRC does not see it this way. When a deadline is missed, penalties start right away, and they are applied automatically. There is no warning and no waiting time.
The biggest issue is that these penalties do not stay small. They increase the longer you wait, and interest is added to any unpaid tax. This means a small delay can turn into a large bill over time. Many people only realise this when the letters from HMRC start arriving. This is why it is important to take Self Assessment deadlines seriously.
If you want to avoid unnecessary penalties, contact FincSol Accountancy today!
What are Self Assessment Deadlines?
Knowing about the deadlines is necessary to avoid penalties. If you submit a paper tax return, the deadline is 31 October following the end of the tax year. For online submissions, the deadline is midnight on 31 January. This same 31 January deadline also applies to paying any tax you owe for that year.
There is also an important deadline on 31 July, which applies to payments on account. These are advance payments towards the next tax year and often catch people by surprise. Missing this deadline can result in additional penalties and interest, even if your January payment was made on time.
Get in touch with FincSol Accountancy today! We help you manage deadlines so nothing is missed.
What HMRC Does When You Miss the Deadline?
As soon as the Self Assessment deadline passes, HMRC takes action automatically. If your return is not submitted by midnight on 31 January, a £100 late filing penalty is issued. This happens even if you intended to submit the return shortly after the deadline or believed you owed no tax.
HMRC does not check your circumstances before issuing the penalty. The system applies the fine automatically, and it remains in place unless you successfully appeal. Many taxpayers assume they will receive a reminder or warning, but HMRC is not required to provide one.
Late Filing Penalties
|
How Late the Return Is |
Penalty Description |
|
Immediately after the deadline |
Fixed penalty of £100, even if no tax is owed |
|
3 months late |
Daily penalty of £10 per day for up to 90 days (up to £900) |
|
6 months late |
Additional penalty of £300 or 5% of tax owed (whichever is higher) |
|
12 months late |
Additional penalty of £300 or 5% of tax owed (whichever is higher) |
Late Payment Penalties and Interest Charges
|
How Late Is the Payment? |
Penalty Description |
|
30 days late |
5% of the unpaid tax, plus interest from the day after the deadline |
|
6 months late |
Additional 5% of the unpaid tax, plus ongoing interest |
|
12 months late |
Further, 5% of the unpaid tax, plus ongoing interest |
FincSol Accountancy can help you plan payments to avoid these extra costs.
What Happens If You Owe No Tax?
A common misunderstanding is that no tax due means no penalty. This is not true. If you are registered for Self Assessment or HMRC has asked you to submit a return, you must do so even if your tax liability is zero. If you don’t submit your self-assessment, you will still face late filing penalties.
This situation often occurs when income drops or stops, but HMRC is not notified. If you believe you no longer need to file a tax return, you must inform HMRC in advance. Failing to meet the requirement will result in penalties.
Get an instant quote today and make your tax filing easy with FincSol Accountancy.
Payments on Account and the July Deadline
Payments on account are advance payments towards the next tax year and apply when your tax bill exceeds £1,000. HMRC usually requires two payments, each equal to 50% of the previous year’s tax bill. The first payment is due on 31 January, and the second is due on 31 July.
Missing the July payment can result in late-payment penalties and interest, even if everything else is paid on time. This often causes financial strain, particularly for new self-employed individuals who are unfamiliar with the system.
How Penalties Grow Over Time?
Penalties can escalate faster than many people expect. For example, someone who owes £2,000 in tax and submits their return more than a year late could face £1,600 in late filing penalties alone. Late payment penalties and interest would be added to this amount.
This means the total cost of being late can be close to, or even higher than, the original tax bill.
What to Do If You Cannot Pay Your Tax Bill?
If you cannot pay your tax bill in full, the worst thing you can do is ignore it and hope it will go away. Many people feel stressed or worried when they see a large tax bill, but HMRC has options to help. One of these options is a Time to Pay arrangement, which lets you break your outstanding amount into smaller monthly payments that are easier to manage.
It is important to understand that interest will still be added while you are paying, but setting up a payment plan can help stop extra penalties from adding up.
To arrange this, you need to contact HMRC and explain your situation. They will usually ask about your income, regular costs, and how much you can afford to pay each month. This can feel uncomfortable or confusing, especially if you are already under financial pressure, but speaking to them early is always better than waiting. The longer you delay, the more charges can be added, and the harder it can be to fix the situation.
FincSol Accountancy can help you set up Time to Pay arrangements correctly and negotiate with HMRC on your behalf.
Reasonable Excuses and Penalty Appeals
HMRC can remove a penalty if you are able to show that you had a genuine reason for missing the deadline. This usually applies when something serious and unexpected happens that was outside your control. For example, a serious illness, the death of a close family member, or a major event such as a fire or flood may be accepted if it stopped you from filing your tax return on time. HMRC looks at each situation on its own, and they will normally ask for proof to support what you say.
It is also important to know what HMRC will not accept as a reasonable excuse. Being busy with work, forgetting the deadline, or depending on someone else to file the return for you are not seen as valid reasons.
If you want to appeal a penalty, you must do so within 30 days of receiving the penalty notice.
How to Avoid Submitting Late in the Future
If you want to avoid penalties in the futures, you need to be prepared:
- Keep your records updated all year:
Try to record your income, expenses, and any receipts throughout the year. When you do this, filing your Self Assessment becomes much easier. You won’t have to rush at the last minute, and the risk of mistakes is much lower.
- File your return early:
You should always file your Self Assessment a few weeks before the deadline, so you have time to check everything carefully.
- Get professional help:
Getting help from an accountant can make a huge difference. They can keep track of deadlines for you, send reminders when needed, and make sure your return is prepared correctly.
- Plan your payments:
If you owe tax, think about how you will pay it in advance; this can help you avoid late payment penalties and interest.
- Know the rules and deadlines:
Take some time to understand what HMRC expects and when things are due. When you're aware of the deadlines, you won’t have to deal with any last-minute surprises, which reduces the chances of missing out on anything that is important.
FincSol Accountancy will help you prepare and submit your taxes on time.
Over to You
Missing the Self Assessment deadline can create more problems than most people realise. The fines, interest, and extra charges can grow quickly, and the stress of dealing with HMRC only makes it worse. Many of these problems happen because people wait too long or aren’t sure how to handle their tax return.
The good news is that most issues can be avoided with a little planning!
Contact FincSol Accountancy today and take control of your Self Assessment before penalties start to build.
Learn more about Self-Assessment Tax Returns here!
FAQs
Q: What happens if I submit my Self Assessment late?
A: If you submit your self-assessment late, you will receive an automatic £100 fine, after which HMRC will wait for three months. If the return is still not filed, daily penalties and interest will add up.
Q: Do I get fined if I owe no tax?
A: Yes, even if you don’t owe any tax, you may still face penalties if you haven’t notified HMRC on time.
Q: Can I appeal a late filing penalty?
A: Yes, if you have a reasonable excuse, for example, a serious illness, the death of a close family member, or a major event such as a fire or flood that stopped you from filing your tax return on time, you can submit your appeal within 30 days.