Specialist UK tax advice for London individuals, landlords, directors and businesses

HMRC penalty appeal accountant London

HMRC Appeals and Penalties support for tax disputes, reasonable excuse and penalty reductions.

Tax Accountant London helps individuals, landlords, company directors, employers, VAT-registered businesses and companies appeal HMRC penalties, challenge tax decisions, review reasonable excuse, prepare reasonable care arguments, respond to penalty notices and deal with HMRC reviews or tribunal routes.

Penalty appeals Reasonable excuse Reasonable care Late filing penalties HMRC review support
Do not appeal with a weak one-line explanation.

A penalty appeal should explain the facts, dates, evidence, tax obligation, HMRC notice, reasonable excuse or reasonable care position and why the penalty should be cancelled, reduced, suspended or reviewed.

01 Check the deadline

We review the penalty notice, appeal date, HMRC decision and whether a late appeal needs explanation.

02 Build the evidence

Appeals should be supported by records, timeline, correspondence, medical evidence or system evidence where relevant.

03 Challenge the penalty

We prepare reasonable excuse, reasonable care, behaviour, suspension, review or tribunal arguments.

HMRC appeals and penalties support

HMRC penalties should be checked against the law, facts, dates and evidence before payment or appeal.

HMRC penalties can arise from late tax returns, late payment, inaccuracies, failure to notify, VAT late submissions, PAYE issues, Corporation Tax filing failures, Self Assessment problems, careless errors, deliberate behaviour allegations or missed appeal deadlines.

A strong appeal is not just a request for sympathy. It should identify the legal basis, the facts, what stopped compliance, what steps were taken, what records exist, whether reasonable care was taken and whether HMRC has applied the penalty correctly.

Who needs HMRC penalty appeal advice

Penalty appeal support for taxpayers, landlords, companies, employers and VAT-registered businesses.

Penalty disputes can become expensive when the wrong appeal route is used, deadlines are missed or HMRC’s behaviour classification is accepted without challenge.

01

Individuals and Self Assessment taxpayers

Late filing penalties, late payment penalties, payments on account issues, reasonable excuse and tax return appeal support.

02

Landlords and property owners

Penalties linked to undeclared rental income, late returns, discovery assessments, disclosure behaviour and HMRC letters.

03

Companies and directors

Corporation Tax penalties, CT600 filing failures, director loan issues, company inaccuracies and behaviour disputes.

04

Employers and VAT businesses

PAYE, CIS, VAT late submission, VAT late payment, employer compliance penalties and records-based appeals.

HMRC penalty notice review

The penalty notice should be checked before an appeal is filed.

HMRC penalty notices can include different appeal routes, deadlines and consequences. The first step is to identify what penalty has been issued, what tax it relates to, whether the penalty is valid and what evidence is available.

Penalty type

Late filing, late payment, inaccuracy, failure to notify, VAT, PAYE, CIS or Corporation Tax penalties need different arguments.

Appeal deadline

Most penalty appeals are time-sensitive. If the deadline has passed, a late appeal explanation may be needed.

HMRC calculation

The penalty amount, tax year, tax at stake, surcharge, points or percentage should be checked for accuracy.

Tax return or payment status

Some appeals may be weakened if the return remains outstanding or the underlying tax position is unclear.

Evidence available

Medical records, HMRC letters, software evidence, adviser correspondence, bank evidence and timelines can be important.

Best route

The correct route may be direct appeal, HMRC review, suspension request, amendment, disclosure or tribunal appeal.

Reasonable excuse appeal

A reasonable excuse appeal needs facts, dates and evidence.

Reasonable excuse arguments may apply where something prevented the taxpayer from meeting a tax obligation despite taking reasonable care. The explanation should show what happened, when it happened, how it affected compliance and what was done once the issue ended.

Serious illness or personal crisis

Medical evidence, hospital records, bereavement details or serious personal circumstances may support an appeal.

HMRC or system issues

Government Gateway access, HMRC delays, filing service issues or incorrect HMRC information may be relevant.

Adviser or third-party issues

Reliance on an adviser is not always enough, but adviser correspondence and steps taken may still matter.

Action after the excuse ended

HMRC usually expects the taxpayer to put matters right promptly once the reason for delay no longer applies.

Common HMRC penalties we review

Different penalties need different technical and evidence-based arguments.

The right appeal depends on the penalty type. A late filing penalty may depend on reasonable excuse. An inaccuracy penalty may depend on reasonable care and behaviour. A VAT penalty may depend on the penalty point or late payment rules.

Self Assessment late filing penalties

Appeals for missed tax return deadlines, daily penalties, six-month penalties and twelve-month penalties.

Self Assessment late payment penalties

Appeals and mitigation where tax was paid late due to reasonable excuse, dispute, payment allocation or hardship issues.

Corporation Tax penalties

Company Tax Return late filing penalties, repeated failure penalties and reasonable excuse arguments.

VAT penalties

VAT late submission points, VAT late payment penalties, repayment checks and VAT compliance penalty disputes.

PAYE, CIS and employer penalties

RTI filing penalties, CIS penalties, P11D issues, PAYE payment penalties and employer compliance penalties.

Failure to notify penalties

Penalties where HMRC says the taxpayer failed to tell HMRC about a tax liability at the right time.

Inaccuracy penalties and reasonable care

For incorrect returns, the key issue is often behaviour, not just the tax amount.

HMRC may charge inaccuracy penalties where a return or document is wrong and tax has been understated. The penalty position can depend on reasonable care, careless behaviour, deliberate behaviour, concealment, disclosure timing and the quality of cooperation.

Reasonable care

If the taxpayer took reasonable care but the return was still wrong, a penalty may not be due.

Careless behaviour

Careless behaviour means a failure to take reasonable care and can lead to a lower category of inaccuracy penalty.

Deliberate behaviour

Deliberate behaviour is more serious and should not be accepted without reviewing the evidence and facts.

Deliberate and concealed

Concealment can significantly increase penalties where HMRC says steps were taken to hide the inaccuracy.

How we build an HMRC penalty appeal

The appeal should be structured around the law, evidence and HMRC’s decision.

Penalty appeals often fail because they are too brief, emotional or unsupported. A strong appeal should explain the legal ground, factual timeline, evidence and why HMRC’s penalty should be cancelled or reduced.

Facts Timeline of events

We set out what happened, when it happened, who was involved and how it affected filing, payment or reporting.

Evidence Documents and records

We gather HMRC letters, medical evidence, adviser correspondence, filing attempts, software records and tax documents.

Law Appeal basis

We identify reasonable excuse, reasonable care, penalty validity, special circumstances, suspension or review grounds.

Outcome Cancellation or reduction

We ask HMRC to cancel, reduce, suspend or review the penalty where the evidence and law support that outcome.

HMRC review and tribunal appeal route

If HMRC refuses the appeal, the case may need review or tribunal consideration.

Where HMRC rejects an appeal, the taxpayer may be offered an HMRC review or may be able to appeal to the tax tribunal. The decision should be made after reviewing the strength of evidence, tax at stake, costs, deadlines and risk.

HMRC internal review

An independent HMRC officer can review the decision, evidence, appeal grounds and penalty position.

Tax tribunal appeal

Where appropriate, the dispute may be taken to the First-tier Tribunal for an independent decision.

Late appeal application

If the appeal deadline has been missed, the reason for lateness and merits of the case need to be addressed.

Settlement discussion

Some disputes may be resolved by agreement, revised penalty calculation or alternative HMRC handling.

Documents needed for HMRC penalty appeals

The appeal should be supported by evidence, not just explanation.

HMRC penalty papers

Penalty notice, date of issue, appeal deadline, HMRC calculations, statements, assessments and previous letters.

Tax return and payment records

Filed returns, submission receipts, payment records, bank evidence, Government Gateway records and HMRC account history.

Evidence for appeal

Medical evidence, bereavement documents, adviser emails, software screenshots, HMRC delay evidence and filing attempts.

Background timeline

What happened, why the deadline was missed or return was wrong, when the issue ended and what action was taken.

Appeals and penalties process

A structured route from HMRC penalty notice to appeal, review or closure.

1 Review the penalty notice

We identify the penalty type, tax year, deadline, appeal route, tax involved and HMRC decision.

2 Assess facts and evidence

We build a timeline and review documents, records, reasonable excuse and reasonable care evidence.

3 Prepare the appeal

We draft the appeal, supporting explanation, evidence schedule and penalty cancellation or reduction request.

4 Deal with HMRC response

We assist with HMRC questions, review decisions, revised penalties, tribunal route and closure.

Appeals and penalties fees

Fees depend on the penalty type, evidence, deadline and HMRC route.

We quote before work starts. A simple late filing appeal is different from an inaccuracy penalty, failure to notify penalty, deliberate behaviour dispute, HMRC review or tribunal matter.

Initial penalty review from £250 + VAT

For reviewing the penalty notice, appeal deadline, penalty type and likely next steps.

Penalty appeal preparation from £500 + VAT

For preparing a structured HMRC appeal with evidence, explanation and appeal grounds.

Complex appeal or review quoted after review

For inaccuracy penalties, behaviour disputes, failure to notify, HMRC review or tribunal-related work.

Appeals and Penalties FAQs

Common questions about HMRC penalty appeals, reasonable excuse, reasonable care and tribunal routes.

Can I appeal an HMRC penalty?

Yes, many HMRC penalties can be appealed if there is a valid reason, such as reasonable excuse, reasonable care, incorrect HMRC calculation, invalid penalty, special circumstances or a dispute about behaviour.

How long do I have to appeal an HMRC penalty?

You usually have 30 days from the date of the penalty notice to appeal or contact HMRC. If the deadline has passed, you may need to explain why the appeal is late.

What is a reasonable excuse?

A reasonable excuse is something that prevented you from meeting a tax obligation despite taking reasonable care. The facts, evidence, timing and action taken after the issue ended are important.

What is reasonable care?

Reasonable care is relevant where a return or document was inaccurate. If you took reasonable care to get the tax right, HMRC may not be able to charge an inaccuracy penalty.

Can HMRC cancel a late filing penalty?

HMRC may cancel a late filing penalty where a valid reasonable excuse applies or where the penalty has not been correctly charged. The appeal should be supported by evidence.

Can HMRC reduce an inaccuracy penalty?

Yes, penalties can sometimes be reduced depending on behaviour, disclosure quality, cooperation, special circumstances and whether HMRC’s behaviour classification is correct.

What if HMRC says the error was deliberate?

You should not accept a deliberate behaviour classification without reviewing the evidence. Deliberate behaviour carries higher penalties and can affect HMRC’s approach to the wider case.

What happens if HMRC rejects my appeal?

You may be able to request an HMRC review or appeal to the First-tier Tribunal, depending on the decision and deadlines. The strength of evidence and cost should be reviewed first.

Should I pay the penalty while appealing?

In some cases, paying may reduce interest risk if the appeal fails. The decision depends on the penalty type, cashflow, appeal merits and HMRC position.

Can you deal with HMRC on my behalf?

Once authorised and engaged, we can assist with penalty review, appeal drafting, evidence preparation, HMRC correspondence, review requests and tribunal route assessment within the agreed scope.