Received an HMRC Penalty? You Might Not Have to Pay It.

If you’ve received a penalty notice from HMRC, you’re not alone—and more importantly, you may not have to pay it. Many individuals and businesses settle these fines without knowing they have the right to appeal.

At AB & CO Accounting & Tax Services limited, we help clients challenge HMRC penalties successfully every week. Here’s how you can do it—and how we can support you.

Step 1: Understand Why You Received the Penalty

Before you appeal, identify the reason behind the penalty. Common causes include:

  • Late filing of your self-assessment tax return
  • Late payment of tax
  • Inaccurate information or errors on your return

Knowing exactly what triggered the penalty is essential—it helps you build a stronger case.

Step 2: Don’t Wait—Time Is Limited

You usually have 30 days from the date on the penalty notice to lodge an appeal. Delaying could result in extra fines or the appeal being rejected. Book call with us:

Step 3: Get Your Tax Affairs in Order First

Before submitting your appeal, make sure your tax return has been filed and any outstanding payments are either settled or under a payment plan.

HMRC is much more likely to consider your appeal if you’re currently compliant. Speak to us if you want your tax returns completed for you accurately to give you a better chance of being considered.

Step 4: Write a Strong Appeal Letter

A well-written appeal letter can make all the difference. Include:

  • Your full name and address
  • Your Unique Taxpayer Reference (UTR)
  • Penalty reference number(s)
  • A clear explanation of why you believe the penalty is unfair
  • A professional, respectful tone throughout

Not sure what to say? We can draft the entire appeal on your behalf. Contact us today.

Step 5: Include Evidence That Supports Your Case

Back up your explanation with solid evidence. This could be:

  • Doctor’s notes or hospital records
  • Evidence of a technical issue (screenshots, emails, call logs)
  • Letters showing bereavement or other serious circumstances

HMRC responds to facts—not feelings. Evidence is your best tool.

Step 6: Submit Your Appeal the Right Way

You can submit your appeal either:

  • Online through your HMRC account
  • By post using Form SA370

Once submitted, HMRC usually responds within 30–45 days.

Need Help Appealing a Penalty? Let’s Talk

Appealing an HMRC penalty can be confusing—but it doesn’t have to be. At AB & CO Accounting & Tax Services limited, we’ve helped countless clients reduce or remove penalties by preparing clear, evidence-based appeals that HMRC takes seriously.

Free Initial Consultation
Expert Tax Advice
Appeals Handled for You from Start to Finish

Contact us today or book a free call to find out if your penalty can be cancelled.