
August 1st, 2026
Tax Dispute Resolution
Tax Disputes | HMRC Negotiations
An individual taxpayer received a substantial assessment from HMRC which they believed was fundamentally flawed.
HMRC had conducted an enquiry into the taxpayer's affairs and had reached conclusions that the taxpayer considered to be incorrect both legally and factually.
The assessment sought to recover a substantial sum in tax, interest, and penalties.
The stakes were high. If HMRC's position was accepted, the taxpayer faced a life-changing tax bill. But challenging HMRC requires careful strategy and thorough preparation.
We were instructed to review the position and advise on the best way forward. Our initial analysis identified several weaknesses in HMRC's position:
Legal Interpretation: HMRC had applied a particular statutory provision in a way that we considered to be incorrect. The provision was ambiguous, and HMRC's interpretation was only one of several possible readings.
Factual Basis: HMRC's assessment was based on certain assumptions about the facts that were not supported by the evidence. There was documentation that contradicted HMRC's version of events.
Procedural Issues: There were questions about whether HMRC had followed the correct procedures in issuing the assessment and whether the time limits for assessment had been properly observed.
Penalties: HMRC had imposed penalties on the basis of "carelessness," but the taxpayer had taken professional advice and had no reason to believe their return was incorrect.
We prepared detailed representations to HMRC addressing each of these issues. The representations ran to over thirty pages and exhibited substantial supporting documentation.
We adopted a structured approach, setting out the legal framework, the facts as we understood them, and the reasons why HMRC's position was incorrect. We were firm but professional, avoiding unnecessary confrontation while being clear about the weaknesses in HMRC's case.
We also set out our client's position on penalties, arguing that no penalty was due because the taxpayer had taken reasonable care and had a reasonable excuse for any error.
The representations were submitted to HMRC, and we entered into a period of correspondence and negotiation. HMRC initially maintained their position, but we persisted in challenging their analysis. Eventually, HMRC agreed to review the matter further.
Outcome
Comprehensive representations submitted challenging HMRC's assessment on legal, factual, and procedural grounds.
Matter remains under discussion with HMRC, with our client's position significantly strengthened.
This case study is based on a real client matter. All identifying details have been removed or changed to protect client confidentiality.