If HMRC has issued a penalty for late filing or late payment, it may be possible to appeal.
That will depend on why the deadline was missed and whether your circumstances meet HMRC’s reasonable excuse rules. Some appeals are accepted. Others are rejected because the explanation is too vague or does not meet the criteria.
This guide explains when an appeal may be worth making and what HMRC will usually expect to see.
If you have not yet dealt with the return itself, read our guide on what happens if you miss the tax return deadline first.
Can You Appeal an HMRC Penalty?
Yes. HMRC allows appeals against certain penalties, including:
late filing penalties
late payment penalties
some penalties linked to errors or compliance issues
The fact that a penalty has been issued does not always mean it is final.
What Counts as a Reasonable Excuse?
This is the main point HMRC will look at.
A reasonable excuse is usually something that stopped you meeting your tax obligation despite taking reasonable care. It generally needs to be outside your control, and you must act without unnecessary delay once the issue has been resolved.
Possible examples may include:
serious illness
bereavement close to the deadline
unexpected hospital treatment
service issues that prevented submission
What HMRC does not usually accept includes:
forgetting the deadline
being too busy
lack of funds on its own
not understanding the rules
Each case turns on its facts, so the detail matters.
Should You Appeal Before Paying?
That depends on the situation.
In some cases, it still makes sense to pay first if further interest is building, then deal with the appeal separately. In others, the priority is to review the penalty notice and prepare the appeal within the deadline.
The key point is not to ignore the notice. Check what type of penalty has been charged and when the appeal deadline expires.
How Do You Appeal an HMRC Penalty?
An appeal can usually be made online or by post, depending on the type of penalty and how HMRC issued it.
You will normally need to explain:
what happened
why it prevented you from filing or paying on time
what steps you took once the problem had passed
Supporting evidence can also help, especially where illness, system issues, or unexpected events are involved.
How Long Do You Have to Appeal?
In most cases, you should appeal within 30 days of the penalty notice.
If that deadline is missed, HMRC may still consider a late appeal in limited circumstances, but it becomes more difficult. It is always better to review the penalty as early as possible.
What Makes an Appeal Stronger?
A stronger appeal is usually one that is:
specific
factual
supported by evidence where possible
clearly linked to the missed obligation
General explanations are less likely to succeed. HMRC will want to understand exactly what prevented compliance and what happened afterwards.
Need Help with an HMRC Penalty Appeal?
If you have received a penalty and are not sure whether you have grounds to appeal, Platinum Accountancy Services can help review the position.
We can assess whether a reasonable excuse is likely to apply, help prepare the appeal properly, and support you with the wider Self Assessment issue if needed. Contact Platinum Accountancy Services for practical advice.
Share this post: