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Sector Focus
We specialise in the investment management industry offering audit, assurance, tax and corporate recovery and liquidation services.
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Personal Tax Services
There are many tax rules that can affect you personally and therefore which will have an impact on your personal wealth.
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QI Compliance
Qualified Intermediaries (QI) have to take action now to perform a Certification to the Internal Revenue Service (IRS).
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Download our tax brochures
The tax teams at Grant Thornton aim to provide the Channel Islands with a premier tax advisory service both to private clients and the business community including the investment management industry.
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Jersey Tax Return
A secure sign in page to file Jersey Tax Returns through the Grant Thornton tax portal.
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ESG
ESG can either be seen as a risk management tool or an opportunity, either way it is imperative to your business, whatever your size and whether you are listed or not.
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Professional Services
Business and accounting support for professional services
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Finance Industry
We work with a broad range of clients and their financial stakeholders, from entrepreneurs in the early days to fast growing and established businesses to public companies competing in global markets.
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Local Businesses
Businesses come in many shapes and sizes – from innovative start-ups to long-established local businesses. But however large or small your business, the chances are you face similar challenges.
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Corporate Insolvency
Our corporate investigation, Guernsey liquidation and recovery teams focus on identifying and resolving issues affecting profitability, protecting enterprise value and facilitating a full recovery where possible.
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Corporate Simplification
Redundant corporate entities can over complicate group structures and waste thousands of pounds in unnecessary costs each year. 46% of the c.15,500 companies controlled by the FTSE100 are dormant and it is estimated that the average cost of administering dormant companies is between £3,500 and £5,000 per company, per year.
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Debt Advisory
Our Debt Advisory team provides commercial and financial debt advice to corporate entities and public sector bodies in a range of sectors. Our engagements include advice on stand-alone transactions and solutions or as part of an integrated business plan, in both the project and corporate arenas.
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Exit Strategy Services
We offer a tailored methodology designed to enable a company to be reviewed in a group context to assess ways to maximise its value.
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Financial Restructuring
For companies challenged by under-performance we work with management teams, shareholders, lenders and other stakeholders to implement financial restructuring solutions creating a stable platform for business turnaround.
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Strategic performance reviews
Strategic performance reviews analyse the key drivers of performance improvement. Our specialists utilise a framework to evaluate financial and operational options and to identify solutions for businesses and their stakeholders.
Grant Thornton Channel Islands joins multinational platform
CHICAGO and JERSEY, October 3, 2025 – Grant Thornton Channel Islands has completed a transaction that makes it part of the Grant Thornton Advisors multinational platform — which was established in January 2025 with the support of an investor group led by New Mountain Capital.
The deal underscores the platform’s seamless connectivity and capabilities across the Americas, Europe and the Middle East, building on the recently announced platform acquisitions of Grant Thornton member firms in Ireland, France, the United Arab Emirates, Spain, the Netherlands, Switzerland/ Liechtenstein, Belgium, the Cayman Islands and Luxembourg.
The platform also includes Auxis, a pioneer in outsourcing and business modernization services, and Stax, which specializes in commercial due diligence and value creation.
The platform, and its 270 professionals in the Channel Islands, now delivers a singular client experience that includes enhanced solutions and capabilities, backed by powerful technologies and a distinctive cross-border culture.
It remains part of the Grant Thornton International Limited network, which comprises member firms in more than 150 markets worldwide.
The transaction was originally announced in June of 2025.