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HMRC Penalty Appeal Solicitors

An HMRC penalty notice is not the final word. Late filing, late payment, and inaccuracy penalties can all be reduced or cancelled — if the appeal is made correctly, on the right grounds, and within the deadline.

HMRC issues penalties for a wide range of compliance failures — late filing of tax returns, late payment of tax, inaccuracies in returns, failure to notify HMRC of a liability, and failure to comply with information notices. The penalty regimes are complex and the grounds for appeal are technical. The most important are "reasonable excuse" (a genuinely unforeseeable or unavoidable event that prevented compliance), "special circumstances" (a special reduction in the penalty rate), and procedural defects in the penalty notice. A solicitor will assess the penalty, identify the grounds of appeal, and pursue the appeal through the HMRC review process and the First-tier Tax Tribunal.

Late filing & late payment penalties Inaccuracy & failure-to-notify penalties Reasonable excuse appeals Free initial consultation

HMRC Penalties — Types & Grounds of Appeal

HMRC penalty types and how each can be appealed — the legal framework for reducing or cancelling penalties.

Every type of HMRC penalty has specific statutory grounds of appeal — the taxpayer must show either a reasonable excuse, special circumstances, or a procedural defect in the penalty notice. A solicitor will identify the most compelling grounds and pursue the appeal.

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Late filing penalties — self-assessment, corporation tax, PAYE

Self-assessment late filing penalties begin at £100 for a return filed up to 3 months late, rising to £10 per day (up to £900) for returns 3 months to 6 months late, with further penalties of £300 or 5% of the tax at 6 and 12 months. Corporation tax returns and PAYE returns have equivalent penalty structures. The most common ground of appeal is reasonable excuse — an unforeseeable or unavoidable event that prevented the taxpayer from filing on time. HMRC's approved list of excuses includes serious illness or bereavement of the person responsible, IT system failures, and postal failures. A solicitor will assess the circumstances, draft the appeal, and represent the taxpayer at the First-tier Tribunal where HMRC refuses the excuse.

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Late payment penalties and interest

HMRC charges late payment penalties where tax is not paid by the due date. The rates vary by tax type — for self-assessment, a 5% penalty on tax unpaid for more than 30 days, with further 5% charges at 6 and 12 months. HMRC also charges late payment interest (currently at the Bank of England base rate plus 2.5%). The new points-based penalty regime (for income tax self-assessment and VAT) accumulates penalty points for repeated failures, with a fixed penalty triggered at the threshold. A solicitor will assess whether a reasonable excuse applies, draft the penalty appeal, and challenge both the principal penalty and the interest where HMRC has calculated it incorrectly or where it is disproportionate to the circumstances.

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Inaccuracy penalties — challenging HMRC's behaviour classification

Inaccuracy penalties under Schedule 24 Finance Act 2007 apply where a return contains an inaccuracy that leads to a loss of tax. The penalty rate depends on the behaviour category — careless inaccuracy (0–30%), deliberate inaccuracy (20–70%), and deliberate and concealed (30–100%). The rates are reduced for prompted and unprompted disclosure. HMRC's classification of the behaviour significantly affects the penalty — characterising an inaccuracy as "deliberate" rather than "careless" can triple the penalty. A solicitor will challenge HMRC's behaviour classification, present the evidence that the inaccuracy was careless rather than deliberate, and demonstrate the quality of the disclosure — maximising the reduction in the penalty rate.

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Failure to notify penalties — challenging the start date and the behaviour

Failure to notify HMRC of a new liability — a new source of income, a capital gain, or a new business activity that creates a tax obligation — is penalised under Schedule 41 Finance Act 2008. The penalty rate ranges from 10% (careless, prompted) to 100% (deliberate and concealed, no disclosure) of the potential lost revenue. The penalty period runs from the date the taxpayer should have notified to the date they did. A solicitor will challenge the period start date (establishing when the obligation to notify arose), challenge the behaviour classification, and demonstrate the quality of the voluntary disclosure to maximise the penalty reduction. Where the taxpayer did not know of the obligation to notify, a solicitor will present the case that the failure was not careless.

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Special circumstances — requesting a reduction in the penalty rate

HMRC has a discretion to reduce a penalty to a lower amount (or nil) where "special circumstances" exist — circumstances that are not already reflected in the standard penalty mitigation (reasonable excuse and quality of disclosure) and that make the standard penalty amount "inappropriate". Special circumstances are deliberately undefined — HMRC applies them rarely and narrowly. Examples from case law include: where the inaccuracy arose from highly technical and contested legal uncertainty; where the taxpayer is seriously ill and personally unable to manage compliance; or where the penalty bears no reasonable relationship to the compliance failure. A solicitor will identify whether special circumstances arguments are available and present them compellingly in the appeal.

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Procedural defects — challenging the validity of the penalty notice

A penalty notice must meet specific statutory requirements to be valid — it must be issued by an authorised HMRC officer, must specify the period and the nature of the failure, must set out the amount of the penalty and the calculation basis, and must notify the taxpayer of the right of appeal. Where a penalty notice is defective — issued out of time, for the wrong period, by an unauthorised officer, or based on an incorrect calculation — it can be challenged on procedural grounds. A solicitor will review the penalty notice against the statutory requirements, identify any procedural defect, and challenge the notice on those grounds — in addition to pursuing any substantive reasonable excuse or special circumstances arguments.

How It Works

Many HMRC penalty appeals succeed — particularly where the taxpayer had a genuine reason for the failure and can present it effectively. A solicitor identifies whether the grounds are available and pursues the appeal if they are.

A solicitor will review the penalty notice, identify the strongest available grounds of appeal, draft and submit the appeal, manage the HMRC internal review process, and represent the taxpayer at the First-tier Tax Tribunal where HMRC refuses to cancel or reduce the penalty.

Submit Your Request
1

Tell us about the penalty and the circumstances

Describe the type of penalty, the amount, the tax year, and the reason the return was filed late, the payment was late, or the return contained an inaccuracy.

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Solicitor assesses the grounds and advises on prospects

A penalty appeal specialist reviews the penalty notice and the circumstances, assesses the available grounds of appeal, and advises on the prospects of success and the most effective route to cancellation or reduction.

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Free initial consultation

You receive clear advice on whether the penalty can be reduced or cancelled — at no cost and no obligation.

Free Initial Consultation

A penalty accepted without appeal is a penalty paid. A solicitor tells you whether the appeal is worth making — and makes it if it is.

Get specialist HMRC penalty appeal advice — and find out whether your penalty can be reduced or cancelled on appeal.

Appeal My HMRC Penalty

Common Questions

HMRC penalty appeals — what people ask us.

What is a reasonable excuse for a late tax return?

A reasonable excuse is an event that prevented the taxpayer from filing on time — an event that is genuinely unforeseeable or unavoidable, and that the taxpayer could not reasonably have prepared for. HMRC's guidance identifies the following as potentially reasonable excuses: serious or life-threatening illness of the person responsible for filing; the death of a close relative shortly before the filing date; an unexpected hospital stay; a fire, flood, or theft that destroyed the tax records; serious postal failures; and HMRC IT system failures. Events that are generally not accepted include: forgetting to file; not receiving the notice (the taxpayer is expected to know the filing date); using an agent who failed to file; and financial difficulties (cash flow problems are not a reasonable excuse for late payment).

How do I appeal an HMRC penalty?

The appeal must be notified to HMRC within 30 days of the penalty notice — either by requesting an HMRC internal review or by notifying a direct appeal to the First-tier Tax Tribunal. An HMRC internal review is conducted by an HMRC officer not involved in the original decision and takes approximately 45 days. If the review upholds the penalty, the taxpayer has 30 days from the review conclusion to notify a First-tier Tribunal appeal. A solicitor will manage the appeal from the initial notification through to the tribunal hearing — drafting the grounds of appeal, managing the evidence, and presenting the case at the hearing. Acting early is important — allowing the 30-day deadline to pass without appealing means the penalty becomes final.

Can I appeal if HMRC says I don't have a reasonable excuse?

Yes — if HMRC refuses the reasonable excuse argument in the internal review, the taxpayer can appeal to the First-tier Tax Tribunal. The tribunal makes its own finding of fact on whether the circumstances constitute a reasonable excuse — it is not reviewing the reasonableness of HMRC's decision; it is deciding the issue afresh. The tribunal regularly accepts reasonable excuse arguments that HMRC has rejected in the review stage — particularly where the evidence of the excuse is compelling and the taxpayer's subsequent compliance (filing the return promptly after the obstacle was removed) is good. A solicitor will prepare the case for the tribunal, ensuring the evidence is presented as effectively as possible.

HMRC says my return inaccuracy was "deliberate". Can I challenge the classification?

Yes — the behaviour classification is itself a matter that can be appealed to the First-tier Tribunal. The tribunal will make its own finding on whether the behaviour was careless, deliberate, or deliberate and concealed — based on the evidence. HMRC bears the burden of proving a higher behaviour category (deliberate or deliberate and concealed) on the balance of probabilities. A solicitor will review HMRC's evidence for the higher behaviour classification, identify weaknesses in HMRC's case, and present the evidence that the inaccuracy was careless rather than deliberate — significantly reducing the penalty rate if the appeal on classification succeeds.

Is there a time limit for paying a penalty while an appeal is pending?

Where a penalty appeal has been notified to the First-tier Tribunal, the taxpayer can apply to postpone payment of the penalty pending the outcome of the appeal. The tribunal will grant a postponement application where there are reasonable grounds for the appeal — a low bar. Without a postponement, HMRC can pursue enforcement action (collecting the penalty by direct debit, attachment of earnings, or distraint) even while the appeal is pending. A solicitor will make the postponement application promptly after notifying the appeal, preventing HMRC from taking enforcement action while the case is before the tribunal.

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