What to Do If Your HMRC Penalty Appeal Is Rejected

You appealed an HMRC penalty. HMRC rejected the appeal. The letter explaining the decision feels final. It is not. Two formal escalation routes are available after a rejection, both with realistic prospects of overturning the original decision, and both available within fixed time windows that you cannot afford to miss.

Why a Rejection Is Not the End of the Appeal

HMRC penalty appeals are reviewed by individual caseworkers who process hundreds of appeals a month. The decision you receive is the judgement of one person looking at one file under time pressure. Appeals fail at this stage for reasons that are often correctable: thin evidence, ambiguous timelines, framing that did not engage with the legal test directly. Many of these issues are fixable with a different presentation, which is exactly what the escalation routes allow.

The published statistics from HM Courts and Tribunals Service show that a meaningful proportion of penalty appeals reaching the First-tier Tribunal succeed in whole or part. The rate varies year to year and category to category, but across most categories of penalty appeal it sits well above the threshold where escalation is worth the effort.

Route One: HMRC Internal Review

Internal review is a fresh look at your appeal by a different HMRC caseworker, usually in a different team. The original decision is not protected. It can be reversed entirely, partially, or upheld. Internal reviews are free and the process is straightforward.

1. 1Within 30 days of the rejection letter, write to HMRC requesting an internal review. The contact address is on the rejection letter itself.
2. 2In the request, summarise the original grounds, identify what you believe the original caseworker overlooked or misread, and provide any additional evidence that supports the appeal.
3. 3HMRC has 45 days to respond, extendable to 75 by agreement. During the review, enforcement on the appealed penalty pauses.
4. 4The reviewer either upholds the original decision, reverses it, or substitutes a different outcome. You receive a written conclusion explaining the reasoning.

Route Two: First-tier Tax Tribunal

The First-tier Tribunal (Tax Chamber) is a genuinely independent court. HMRC has no influence over its decisions. Tribunal judges apply the same legal test that HMRC applies, but they apply it freshly, on the evidence in front of them, with no obligation to defer to HMRC's original conclusion.

Tribunal hearings are formal but accessible to unrepresented parties. Many penalty appeals are decided on paper without an oral hearing, which means the appellant submits written evidence and arguments and the judge issues a decision based on the file alone. Where an oral hearing is held, it is informal by court standards: judges often help unrepresented appellants frame their case.

1. 1Within 30 days of the most recent HMRC rejection (initial or post-review), file a Notice of Appeal with the Tribunal using form T240. Available at gov.uk/tax-tribunal.
2. 2Pay the tribunal fee or apply for a fee remission. Penalty cases attract a "Default Paper" or "Basic" fee depending on value, both modest.
3. 3HMRC files its formal Statement of Case responding to your grounds, usually within 60 days.
4. 4The case is allocated to a track: Default Paper for simpler cases (decided on paper), Basic for cases warranting a short hearing, Standard for complex cases.
5. 5The tribunal issues a decision, either after the paper review or after the hearing. Decisions are published.

How to Choose Between Internal Review and Tribunal

For most rejections, internal review is the right first step. It is free, it is fast, and a meaningful proportion of original rejections are reversed at this stage. If the review also rejects, escalating to tribunal is the next move. Going straight to tribunal without first taking the internal review is rarely the optimal sequence.

The exception is where the rejection turns on a clear point of legal principle that HMRC is applying systematically (and incorrectly). In those cases an internal review by a colleague is unlikely to break the pattern, and tribunal is the route that delivers an independent ruling. This is rare and usually applies to corporate or specialist appeals rather than standard Self Assessment cases.

What Changes the Outcome on Escalation

Escalation succeeds where the original appeal failed for procedural or framing reasons rather than substantive ones. The most common improvements specialists make at the review or tribunal stage:

• Specific dates replacing approximate periods. Tribunals are unforgiving of vagueness.
• Explicit engagement with each leg of the three-part test, point by point.
• Additional evidence that addresses the original caseworker's stated reasons for rejection.
• A clear answer to the post-recovery delay question, which trips up most rejected appeals.
• Reframing where the original cited an HMRC-rejected category (such as "too busy") that should have been recast as a sub-element of an accepted category.

Common Questions About Escalating Rejections

Can I switch tracks once I have started?

You can escalate from internal review to tribunal if the review goes against you. You cannot use the tribunal track to revisit something you have already lost at tribunal except on points of law via the Upper Tribunal.

Will going to tribunal trigger an HMRC investigation?

No. Tribunal appeals are routine and HMRC does not treat appellants any differently from anyone else.

Do I need a lawyer for the tribunal?

No. You can represent yourself or be represented by a tax agent or accountant. Many simpler cases are decided on paper and never have a hearing.

What if I missed the 30-day window after rejection?

You can still apply, but you will first need to justify the delay before the substantive case is heard. The longer the delay, the higher the bar. A specialist who handles late tribunal applications knows the framing that works.