Keith Bull

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Services

Audit

Advisory

Our progressive thinkers offer services to help create, protect and transform value today, so you have opportunity to thrive tomorrow.

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Aviation Advisory
Our dedicated Aviation Advisory team bring best-in-class expertise across modelling, lease management, financial accounting and transaction execution as well as technical services completed by certified engineers.
Business Risk Services
Our Business Risk Services team leverage our risk, internal audit and technology subject matter expertise to critically assess your governance, risk and internal control mechanisms, thus helping you to better manage risk and enable more informed decision making.
Consulting
Whatever your business needs, our Consulting team can help you to move forward and identify and implement major transformations efficiently and effortlessly.
Financial Accounting and Advisory Services (FAAS)
As organisations expand into new markets or undertake functional financial transformations, the challenges faced by their accounting and finance teams become more complex. The Financial Accounting and Advisory Services (FAAS) team at Grant Thornton is a multi-disciplinary team that designs and implements creative solutions to address these complexities.
Fintech
Our Fintech team will be offering you an opportunity to sit with our experienced consultants to discuss your challenges.
Forensic Accounting
Organisations may undergo some type of dispute or internal investigation during their lifetime. Our Forensic Accounting team can seek evidence that can make the difference between finding the truth or being left in the dark.
Risk Advisory
Our Risk Advisory team delivers innovative solutions and strategic insights for the Financial Services sector, addressing disruptive forces, regulatory changes, and emerging trends to enhance risk management and foster competitive advantage.
Sustainability Desk
We recognise that businesses are operating at different levels of maturity when it comes to sustainability, and pride ourselves on working with our clients to develop bespoke solutions to their exact needs.

Audit

Our services can strengthen your business and stakeholders' confidence. You'll receive professionally verified results and insights that help you grow.

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Tax

Expert-led tax advisory and compliance services for individuals and businesses in the Isle of Man, delivering practical, proactive and efficient solutions.

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Company tax
Our experienced corporate tax advisors work closely with your business to ensure full compliance and optimal efficiency. By understanding your commercial operations, we identify opportunities to manage liabilities, reduce risk, and strengthen your financial position through tailored tax planning and advice.
Global mobility
Our integrated approach brings together specialists from tax, payroll and people advisory to simplify global mobility management. We help you navigate expatriate and international tax obligations while ensuring compliance and supporting your people through relocation.
Indirect tax advisory and compliance
Transactional taxes such as VAT and customs can quickly become major financial exposures. Our Indirect Tax team helps you manage risk, ensure compliance across jurisdictions, and identify opportunities to streamline processes—protecting cash flow while maintaining transparency with tax authorities.
International tax
Operating internationally introduces complex tax considerations. We collaborate across our global network to design efficient, compliant structures that align with your operational footprint and strategic priorities—delivering confidence and clarity across borders.
Private client
Our Private Client team supports you through every stage of your personal financial journey. From residency and domicile planning to succession and wealth transfer, we help you minimise the impact of taxes such as income, capital gains and inheritance tax, ensuring your wealth is protected for future generations.

Experience

Keith joined Grant Thornton Isle of Man as Head of Tax in August 2025. He began his career with Grant Thornton UK in 2002, where he completed his training and became a member of the Chartered Institute of Taxation.

Keith took the strong technical foundation provided by training at GTUK and moved into industry, gaining valuable commercial insight during 17 years working in global financial services and technology led firms.

During his time as an in-house advisor, Keith worked in FTSE100 and FTSE250 financial services groups as well as high-growth fintechs, leading in-house tax functions, managing audit and compliance cycles across multiple jurisdictions, and advising on a wide range of tax matters.

Service experience

Corporate income tax
Personal tax
Transfer pricing
VAT
Employment taxes
Managing tax authority enquiries

Qualifications

Member of the Chartered Institute of Taxation (since 2006)

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Keith Bull

Associate Director - Head of Tax

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Keith Bull

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