Can You Reduce or Appeal HMRC Penalties?

Who this guide is for

This guide is for individuals, sole traders, landlords and limited company directors who have received an HMRC penalty or late filing notice.

It is especially useful if the penalty relates to Self Assessment, VAT, PAYE, Corporation Tax or missed HMRC submissions.

Why penalties happen

HMRC penalties can arise for several reasons, including:

• late tax returns
• late payments
• inaccurate returns
• missing VAT returns
• payroll reporting failures
• failure to keep records
• not responding to HMRC requests

The penalty rules vary depending on the tax.

Check the penalty notice

Before appealing, read the notice carefully.

Check:

• which tax it relates to
• the date of the notice
• the amount of the penalty
• the reason HMRC gives
• the appeal deadline
• whether interest is also being charged
• what action HMRC expects

You need to understand the penalty before deciding how to respond.

What is a reasonable excuse?

A reasonable excuse is a reason HMRC may accept for missing a deadline or failing to meet an obligation.

What counts depends on the facts. Serious illness, bereavement, system issues or unexpected events may be relevant, but simply forgetting or being busy is usually weak.

Evidence matters. If you appeal, you should explain what happened, why it prevented compliance and what you did to fix the issue.

Appeals and time limits

You usually have 30 days from the penalty date to appeal or contact HMRC.

If you miss the appeal deadline, you may need to explain why the appeal itself is late.

Different taxes have different appeal routes, so use the process shown on the penalty notice or official GOV.UK guidance.

File or pay even if you appeal

Appealing a penalty does not always remove the need to file the missing return or pay tax owed.

If a return is still outstanding, file it as soon as possible. If tax is due and you cannot pay, contact HMRC early about payment options.

Common mistakes

A common mistake is appealing emotionally without evidence.

Another mistake is focusing only on the penalty and forgetting to file the missing return.

Some people also appeal after the deadline without explaining why the appeal is late.

Finally, business owners sometimes ignore smaller penalties and allow them to escalate.

What to do next

If you receive a penalty:

1. Read the notice carefully.
2. Note the appeal deadline.
3. Check whether HMRC's facts are correct.
4. File any missing returns.
5. Gather evidence for any reasonable excuse.
6. Appeal through the correct route if appropriate.
7. Ask an accountant if the position is unclear.