-
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.
-
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.
Grant Thornton Isle of Man appoints new Head of Tax
Isle of Man, 17 Oct, 2025 - Grant Thornton Isle of Man has further strengthened its leadership team with the appointment of Keith Bull as Head of Tax. The appointment marks a significant step in enhancing the firm’s expertise and broadening the depth of its client services.
Keith began his career with the Grant Thornton in London where he trained across corporate, personal, and employment taxes before qualifying as a member of the Chartered Institute of Taxation in 2006. Since then, he has amassed more than 17 years’ senior in-house experience across the global financial services and fintech sectors, including roles with FTSE100 and FTSE250-listed businesses as well as high-growth, entrepreneurial firms.
Throughout his career, Keith has led in-house tax functions, overseen multi-jurisdictional audit and compliance cycles, and advised on complex matters including international structuring, transfer pricing, VAT, employment taxes, and tax authority enquiries. His unique combination of technical expertise and commercial insight positions him to add significant value to both the firm and its clients.
His appointment comes at a critical moment for the Island. With global reforms such as the OECD’s Pillar 2 global minimum tax reshaping the way businesses structure and manage their tax affairs, the demand for high-level, forward-looking advice has never been greater. Keith’s extensive experience in navigating cross-border tax complexity ensures that Grant Thornton is well placed to support clients through these changes while continuing to champion the Isle of Man as an attractive and competitive business location.
Keith Bull commented:
“It’s great to be back at Grant Thornton. I have joined the Isle of Man office at a very exciting time when we are starting to really leverage the wider Grant Thornton platform. We already had a fantastic tax team here and I believe my 17+ years of industry experience adds a new dimension, bringing a fresh perspective and valuable insight for our clients. The Island is a very special place to build a career and a life, and I’m looking forward to contributing to both the business community and the wider community here.”
Simon Nicholas, Managing Director of Grant Thornton Isle of Man, added:
“We are pleased to welcome Keith back to Grant Thornton. His extensive experience across global financial services and fintech businesses will be a huge asset to our clients and to our team.
Keith’s appointment demonstrates our continued commitment to growth and our determination to deliver the very best in tax expertise, as we broaden our reach and strengthen our position in the market. It also reinforces our belief in the Isle of Man as a fantastic place to do business, and we are proud to continue promoting the Island as a centre of excellence for financial and professional services.”
-
![Simon Nicholas]()
Simon Nicholas Simon is an audit and advisory partner and the Head of Practice at Grant Thornton's Isle of Man office. He has over 25 years of experience working with financial services clients, as well as clients in the technology and gaming sectors, and advising governments.View Profile -
![Keith Bull]()
Keith Bull Head of Tax in the Isle of Man, Keith specialises in corporate, personal and international tax, with deep expertise in financial services and fintech.View Profile
