Missed the Self Assessment Deadline? What to Do Next
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Missed the Self Assessment Deadline? What to Do Next
If you’ve missed the Self Assessment deadline, don’t worry — this is a common issue and it can usually be fixed. The key is to take action as soon as possible to reduce penalties and interest.
This guide explains what happens if your tax return is late and how to deal with it.
What Is the Self Assessment Deadline?
In the UK, the main deadlines are:
- 31 January – online Self Assessment tax return and tax payment deadline
- 31 October – paper tax return deadline
If HMRC does not receive your return by 31 January, late filing penalties normally apply automatically.
What Happens If You Miss the Self Assessment Deadline?
If your Self Assessment tax return is late, HMRC may charge:
- A £100 late filing penalty
- Additional daily penalties if the return remains outstanding
- Interest on any unpaid tax
These penalties apply even if you have no tax to pay.
Missed the Deadline? What Should You Do Now?
Submit Your Tax Return As Soon As Possible
Filing the return quickly helps stop further penalties from building up.
Pay What You Can
If you can’t pay the full tax bill, paying part of it reduces interest.
Don’t Ignore HMRC Letters
Ignoring HMRC reminders can lead to higher penalties and enforcement action. Dealing with it early gives you more options.
Can Penalties Be Reduced or Cancelled?
In some cases, HMRC may reduce penalties if you had a reasonable excuse, such as illness or unexpected personal circumstances. Each case is reviewed individually.
How We Can Help
If you’ve missed the Self Assessment deadline, we can:
- Prepare and submit your tax return quickly
- Deal with HMRC on your behalf
- Review penalties and appeals
Our aim is to make the process simple and take the stress off you.
Need Help With a Missed Self Assessment Deadline?
The sooner you act, the easier it is to resolve.
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