Sean Bannister, Head of Tax, leads a uniquely multidisciplinary team of tax advisers, accountants, and barristers, combining contentious and non-contentious tax expertise.

He advises high-net-worth individuals, entrepreneurs, trustees and family offices on complex UK and international tax matters, empowering clients to anticipate and manage risk whilst achieving their long-term personal and business objectives, protecting their wealth. Sean provides practical, commercially focused advice, which enables the successful delivery of robust solutions that stand up to scrutiny and support wider growth goals.

Sean’s practice spans private wealth and private capital structuring, succession planning, international tax matters, compliance, and disclosure, as well as HMRC enquiries, investigations, and disputes. He is particularly valued for guiding clients through sensitive and high-stakes situations, delivering clear, pragmatic solutions that provide certainty and confidence where tax considerations intersect with broader commercial, reputational, and succession priorities. His expertise is regularly sought by family offices, wealth managers, accountants, and other professional advisers supporting clients with complex tax issues.

Expertise
Tax Tax Advisory Services Tax Compliance Tax Disputes
Credentials
Recommended in the Citywealth Top 50 Tax Professional List 2025
Named as one of eprivateclient’s 50 Most Influential (2024)
Named in the Citywealth Global Top 100 Tax Professionals List 2023
Named in the Citywealth Leaders List
Top Recommended in Spear’s 500 2024
Winner of Wealth & Finance INTL – Best for Tax Dispute Resolution – UK
Chartered Tax Advisor
EXPERIENCE
Sean’s experience includes:
Advised on a non-UK life assurance policy holding over $100 million in overseas fund interests.
Restructured a non-UK trust owning a Central London residential property portfolio.
Planned the UK exit to Monaco for a non-dom individual ahead of deemed domicile changes.
Established a non-UK trust pre-April 2017 for a client approaching deemed domicile status.
Led a mixed fund cleanse for a non-dom repatriating funds to the UK.
Structured Business Investment Relief for a finance professional investing in a UK venture.
Advised on the sale of a UK business to maximise Entrepreneurs Relief and non-dom benefits.
Navigated the relevant loan regime for a non-UK collateral-backed property acquisition in London.