If you've received a penalty from HMRC for filing your tax return late or paying your Self Assessment tax after the deadline, you may be able to appeal — especially if you have a reasonable excuse. Acting quickly and providing clear evidence can make all the difference.

 

When Can You Appeal?

You can appeal a penalty if:

• You filed your tax return late

• You paid your tax bill late

• You were issued a penalty but believe you didn’t need to file a return

• You believe the penalty was issued in error

You must submit your appeal within 30 days of the date on the penalty notice.

 

How to Appeal

There are two main ways to appeal:

1. Online – Use HMRC’s Self Assessment appeal tool for late filing or late payment penalties

2. By post – Complete and send form SA370 (for individuals) or SA371 (for partnerships) to HMRC at:
   Self Assessment, HM Revenue and Customs, BX9 1AS

You’ll need:

• The date the penalty was issued

• The date you filed your return or paid your tax

• A clear explanation of your reasonable excuse

🔹 What Counts as a Reasonable Excuse?

 

HMRC accepts appeals for reasons such as:

• Serious illness or hospitalisation

• Bereavement of a close relative

• Fire, flood, or theft affecting your records

• Technical issues with HMRC’s online services

• Postal delays or missing correspondence

• Other exceptional circumstances beyond your control

You should provide supporting evidence where possible — such as medical notes, screenshots, or correspondence.

 

What Doesn’t Count?

HMRC is unlikely to accept excuses like:

• Forgetting the deadline

• Not understanding the rules

• Relying on someone else to file for you

• Losing your login details

• Not receiving your activation code in time

 

What Happens Next?

• HMRC will review your appeal and respond, usually within a few weeks

• If your appeal is accepted, the penalty will be cancelled or refunded

• If rejected, you can request a review or escalate to a tax tribunal

💡 If you pay the penalty while appealing and your appeal is successful, HMRC will refund the amount with interest.

 

Need Help Appealing a Penalty?

Appealing a penalty can be stressful — especially if you're unsure what counts as a valid excuse or how to present your case. We specialise in crafting clear, compliant appeals that give you the best chance of success.

✅ Professional support
✅ Tailored appeal letters
✅ Fast turnaround

Contact us today and let us help you challenge unfair penalties with confidence.

• Email info@accounted4tax.co.uk

• Phone/WhatsApp +447563811938