How to Appeal an HMRC Decision: Your Guide to the Tax Tribunal

To appeal an HMRC decision, you must notify the First-tier Tribunal (Tax Chamber) within the strict statutory deadlines. This independent judicial body will review your tax dispute afresh. There is no filing fee to submit an appeal, and you have the right to represent yourself throughout the proceedings.

Key Takeaways: Crucial Rules for Your HMRC Appeal

Before starting your tax dispute, you must understand the vital procedural rules that govern the First-tier Tribunal. Small administrative errors can lead to your case being struck out before it is ever heard by a judge.

• Strict 30-day deadline: You must generally appeal within 30 days of the date on your HMRC decision or statutory review conclusion letter.
• Zero tribunal filing fees: There is no cost to file your notice of appeal with the First-tier Tribunal (Tax Chamber).
• Different pathways apply: Direct and indirect taxes use completely different legal routes to reach the tribunal.
• Risk of strike-outs: Filing your appeal via the wrong pathway or on the wrong day can result in an immediate strike-out of your case.

How do I appeal to the First-tier Tax Tribunal?

You appeal to the First-tier Tribunal by submitting a formal notice of appeal online or by post, explaining what HMRC got wrong. The First-tier Tribunal (Tax Chamber) is an independent judicial body that resolves tax disputes between taxpayers and HMRC. It is entirely separate from HM Revenue and Customs, ensuring an unbiased hearing.

You do not need to pay any court fees to submit your appeal. Furthermore, there is no requirement to hire a solicitor or a tax advisor, as the tribunal allows for complete self-representation. This makes the system accessible for individuals and small businesses alike.

Direct vs. Indirect Taxes: Which route applies to your appeal?

The pathway to the tribunal depends entirely on whether your dispute involves direct taxes or indirect taxes. You must follow the precise statutory route to avoid your case being struck out immediately by the tribunal judge.

For direct taxes, you must lodge a written appeal with HMRC first under section 31A of the Taxes Management Act 1970. Only after this step can you notify the tribunal under section 49D of the Taxes Management Act 1970. In contrast, section 83G of the Value Added Tax Act 1994 allows you to appeal indirect taxes directly to the tribunal.

The strictness of these pathways was highlighted in the case of Curtis v HMRC [2025] UKFTT 1605 (TC). In this case, the tribunal struck out the appeals because the paperwork arrived on the same day HMRC received the initial appeal, meaning HMRC had not yet had the opportunity to review it. Additionally, indirect tax appeals may require you to pay the disputed VAT or customs bill before the tribunal will hear your case.

Should you accept an HMRC statutory review?

An HMRC statutory review is an optional internal process where a different HMRC officer reviews the original decision. It offers a cost-effective and quick way to resolve a dispute without the formality of a full tribunal hearing.

If you choose to accept an HMRC review offer, you must wait for it to conclude before notifying the tribunal. Under section 49G of the Taxes Management Act 1970, you then have a strict 30-day window from the date of the review conclusion letter to appeal to the tribunal.

You must be careful not to ignore a review offer. Under section 49C(4) of the Taxes Management Act 1970, if HMRC offers a review and you fail to accept it or notify the tribunal within 30 days, your appeal is legally deemed settled in HMRC's favour permanently.

When is the deadline to appeal to the Tax Tribunal?

The standard deadline to appeal to the tribunal is 30 days from the date printed on your HMRC decision letter. This 30-day limit begins on the date of the letter itself, not on the day you received it in the post.

If you miss this timeline, you must ask the tribunal for special permission to make a late appeal. You will need to provide a valid, objective explanation for the delay, such as a serious illness or a major postal disruption. The tribunal judge has sole discretion over whether to accept a late application.

Step-by-step: How to submit your appeal online, by post, or email

Submitting your appeal requires following specific practical steps and using the correct official contact details. This process must be completed carefully to ensure all documents are received safely.

1. Go online to the official portal at appeal-tax-tribunal.service.gov.uk to complete the digital appeal form.
2. If you prefer physical filing, download Form T240 from the GOV.UK website.
3. Prepare your supporting documents, which must include your original HMRC decision letter and any statutory review conclusion letters.
4. Email your completed Form T240 and attachments to hmcts.taxappeals@justice.gov.uk.
5. Alternatively, post your physical documents to: First-tier Tribunal (Tax Chamber), PO Box 16972, Birmingham, B16 6TZ.
6. If you have queries about the process, call the tribunal helpline on 0300 303 5857 (open Monday to Friday, 9am to 4pm).

What must you include in your notice of appeal?

Under Rule 20(2) of the Tribunal Procedure Rules 2009, your notice of appeal must contain specific information to be valid. Omitting key details can delay your case or lead to it being rejected.

Your notice must include your name, contact details, the contact details of any representative, and the specific details of the HMRC decision. You must clearly state the outcome you expect the tribunal to deliver. Finally, you must outline your clear grounds of appeal with supporting evidence.

Your grounds of appeal must state exactly why HMRC's decision is incorrect. Solid grounds of appeal typically fall into the following categories:

• Factual errors: Showing that HMRC used incorrect figures, dates, or calculations.
• Legal errors: Showing that HMRC applied the tax legislation incorrectly or misinterpreted a statutory test.
• Disproportionate penalty: Arguing that a penalty is unfair or calculated incorrectly based on the circumstances.
• Reasonable excuse: Demonstrating a valid, unforeseen reason for a missed deadline, such as illness or bereavement.

What powers does the First-tier Tribunal have?

The First-tier Tribunal acts as an independent arbitrator with specific legal powers to resolve your tax dispute. The tribunal can quash HMRC's decision completely, vary the decision by reducing assessments or penalties, or substitute its own decision in place of HMRC's original choice.

The burden of proof generally lies with the taxpayer. This means you must present sufficient evidence to prove your grounds of appeal are correct. However, for specific penalty assessments or allegations of fraud, the burden of proof shifts to HMRC to prove their case.

Will I have to pay legal costs in the Tax Tribunal?

The First-tier Tribunal operates a general 'no-cost' rule for most standard cases. This means that each party pays their own legal costs, and you will not have to pay HMRC's costs if you lose.

The tribunal can make an exception and award costs if one party acts unreasonably during the proceedings. In cases classified as 'Complex', a loser-pays regime automatically applies unless you choose to opt out in writing within 28 days of receiving the categorisation notice.

What happens if you lose your First-tier Tribunal case?

If you lose your case, you can apply for permission to appeal to the Upper Tribunal. You must submit this application within 56 days of receiving the First-tier Tribunal's full written decision.

Your appeal to the Upper Tribunal must be based on a point of law, meaning the First-tier Tribunal made a legal error in its decision. You cannot appeal simply because you disagree with the factual findings. Be aware that the Upper Tribunal operates a formal loser-pays costs regime.