Expert guidance. Trusted resolutions.

Tax investigations and disputes demand clear thinking, specialist expertise, and early, strategic action. Whether it’s a voluntary disclosure, a complex COP9 investigation, or an enquiry into an individual, company or trust, we bring deep technical insight and a calm, decisive approach to every case.

Tax investigations are not just part of what we do—they’re part of who we are. Trident Tax was founded in 2009 with a clear vision: to combine technical excellence with trusted, personal relationships in the handling of complex and sensitive tax matters. From the outset, the firm was shaped by deep experience in HMRC and the private sector, particularly in serious fraud and high-level investigations, including advising clients during the Liechtenstein Disclosure Facility era.

Today, that legacy continues through a senior team of investigation specialists—many of whom have trained and practised within HMRC and the Big Four. Together, they bring decades of experience and insight to every aspect of tax enquiries, disclosures, and contentious matters.

We help by:

Resolving investigations – Handling HMRC enquiries involving individuals, companies, and trusts. From COP8 and COP9 to complex technical disputes, we manage every stage with precision and discretion.

Securing immunity through COP9 – Supporting clients under the Contractual Disclosure Facility, where full cooperation can protect against prosecution. Early advice is crucial.

Managing voluntary disclosures – Guiding clients through unprompted or prompted disclosures, minimising penalties while ensuring accuracy and compliance.

Unwinding historic tax avoidance – Advising on the resolution of legacy tax avoidance schemes, including settlement negotiations, reputational protection, and future-proofing client structures.

Safeguarding value and reputation – Designing defence strategies to manage risk, reduce liabilities, and communicate effectively with HMRC—all while preserving client confidentiality.

We advise private individuals, family offices, trustees, entrepreneurs, and corporates on all aspects of HMRC engagement—proactive or reactive. Whether your issue is historic or newly emerging, we provide the clarity, discretion and expertise needed to resolve it.