Grant Thornton

What Grant Thornton does

Grant Thornton (Ireland, Northern Ireland, Isle of Man, Gibraltar, and Bermuda) is the Irish member firm of Grant Thornton International Ltd (GTIL), a top-6 global accounting and advisory network. The firm provides three core service lines: Audit and Assurance (FRC-registered for Public Interest Companies), Tax (corporate, international, employer/payroll, indirect, and private client), and Advisory (consulting, corporate finance and deal advisory, forensic accounting, restructuring, and business risk). It serves large corporates, FTSE and listed companies, financial services firms, mid-market growth companies, high-net-worth individuals, and government/public sector clients across eight offices and 150+ markets globally via the GTIL network.

The firm's technology stack is built around professional service delivery rather than software products, with notable technology-enabled capabilities in AI-based eDisclosure and document review (deployed at scale across engagements exceeding 250 million documents), digital forensics, cyber response, and forensic data analytics. These capabilities are operationalized through the forensic and investigation sub-practices rather than sold as standalone products. The firm also holds approved-supplier status on the UK Crown Commercial Service RM6336 eDisclosure framework, providing direct access to UK government work.

The firm operates on a partner-led professional services engagement model. Revenue is generated through quote-based fees for audit, tax, and advisory engagements, with no public pricing. Go-to-market is direct enterprise relationship management by partners and directors, complemented by content marketing (insights, factsheets, Budget analysis, NI M&A Outlook, Deals Digest), events, sponsorships, and PR. Revenue streams are diversified across Audit and Assurance, Tax Advisory and Compliance, Advisory Services, and eDisclosure/Document Review. Following the January 2025 reorganization into an Alternative Practice Structure, Grant Thornton Holdings Limited was acquired by Grant Thornton Advisors LLC (US), with audit and non-audit services delivered under separate licensed entities.

Name

Grant Thornton

Legal name

Grant Thornton (NI) LLP and Grant Thornton Advisors (NI) LLP

Website

https://grantthorntonni.com

Company type

Private

Founded year

1899

Operating status

Operating

Headcount range

101–250 employees

Short description

Grant Thornton Ireland is a top-6 global accounting network's Irish member firm, delivering audit, tax, and advisory services to large corporates, listed entities, financial services firms, mid-market companies, HNW individuals, and government clients across 8 offices and 150+ markets.

Ownership category

akta.pro rank

Headquarters

HQ city

Belfast

HQ country

United Kingdom

HQ region

Europe

Offices8 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Audit and Assurance Services: Statutory audits, audit and assurance services for publicly listed companies and private entities. The firm is registered with the Financial Reporting Council (FRC) to undertake audit work for Public Interest Companies (PIE).
2. Tax Advisory and Compliance: Corporate tax, employer solutions and payroll, indirect tax compliance and advisory, international tax, and private client compliance and advisory services. Revenue in tax department has increased seven-fold in eight years.
3. Advisory Services: Business risk services, consulting (including CFO advisory, digital solutions, HR and people solutions, M&A solutions, regulatory and policy solutions, strategy and economic advisory, sustainability solutions, workforce solutions), corporate finance and deal advisory, and forensic services including restructuring.
4. eDisclosure and Document Review: Electronic discovery and litigation support services to government agencies and public sector organisations through Crown Commercial Service framework

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Grant Thornton provides audit and assurance, tax, and advisory services to corporate clients, financial institutions, public interest entities, and high-net-worth individuals. The firm delivers statutory and FRC-registered audits, corporate and international tax advisory, corporate finance and M&A deal advisory, forensic accounting, restructuring, and consulting services across multiple jurisdictions including Ireland, Northern Ireland, Isle of Man, Gibraltar, and Bermuda, with access to a global member-firm network spanning 150+ markets.

Product overview

Grant Thornton offers a comprehensive suite of professional services organized around three core pillars: Advisory, Audit and Assurance, and Tax Services. The Advisory practice provides specialized consulting services including business risk management, cyber security with incident response capabilities, financial crime prevention, CFO advisory, digital solutions, M&A solutions, strategy and economic advisory, sustainability solutions, and forensic services (covering asset tracing, digital forensics, eDiscovery, fraud investigations, and forensic data analytics). The Corporate Finance and Deal Advisory sub-service offers full lifecycle support from business sales and acquisitions through due diligence, valuations, financial modelling, and capital raising. The Tax Services division encompasses corporate tax, employer solutions and payroll, indirect tax, international tax with transfer pricing expertise, and private client services. All services are delivered by professional advisors across multiple jurisdictions including Ireland, Northern Ireland, Isle of Man, Gibraltar, and Bermuda.

Differentiator

Problem solved

Functional benefit

Products and services

• Advisory Services Comprehensive advisory services encompassing business risk management, consulting (CFO advisory, digital, HR and people, M&A, regulatory and policy, strategy and economic, sustainability, workforce solutions), corporate finance and deal advisory, forensic accounting, and restructuring to help clients navigate complex business challenges.
• Audit and Assurance Independent statutory audits and assurance services for clients across various sectors, including FTSE-listed companies and Public Interest Companies, provided under Financial Reporting Council (FRC) registration.
• Tax Services Full suite of tax services including corporate tax compliance and advisory, employer solutions and payroll, indirect tax compliance and advisory, international tax including transfer pricing, and private client compliance and advisory for high-net-worth individuals and family businesses.
• eDisclosure and Document Review Market-leading AI-based electronic discovery and litigation support service for government agencies and public sector organisations, capable of handling complex matters including engagements with over 250 million documents across five continents, delivered through the Crown Commercial Service framework.
• Restructuring and Recovery Restructuring, recovery, reorganisation, and formal insolvency administration services for corporates and lenders, including acting as Joint Administrator on major cases such as the Rushmere Shopping Centre/Retail Park for Central Craigavon Limited.
• Corporate Finance and Deal Advisory Full spectrum of corporate finance services including selling and buying businesses, due diligence, valuations, financial modelling, raising debt and equity, energy and infrastructure advisory, and real estate advisory, recognized as Northern Ireland's leading corporate finance adviser in 2023.

Quantifiable outcome

• Revenue increased sevenfold in Belfast office over 8 years
• +3 more outcomes

Named customers5 records

Segments5 records

Ideal customer profiles6 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Grant Thornton International Limited (GTIL)coreStrategic or Co-development PartnerGTIL is the not-for-profit, non-practicing, international umbrella membership entity organized as a private company limited by guarantee. GTIL is one of the world's leading organizations of independently owned and managed accounting and consulting firms. Grant Thornton Ireland is a full member firm of GTIL.

Scale indicators12 records

Recent moves6 records

Expansion highlights6 records

Regional players

• Baker Tilly Ireland: Mid-tier accounting network present in Ireland; offers audit, tax, and advisory services with comparable mid-market positioning but smaller scale than Grant Thornton.
• Crowe Ireland: Top-tier accounting and advisory network with Irish operations; competes primarily in the mid-market audit, tax, and corporate finance space.

Broad incumbents

• PwC Ireland: Big Four firm with substantial Ireland and Northern Ireland presence offering audit, tax, and advisory services; directly comparable to Grant Thornton in target segments and service mix.
• KPMG Ireland: Big Four firm with full-service audit, tax, and advisory practices in Ireland and Northern Ireland; the closest direct competitor on regulated audit, corporate tax, and deal advisory work.
• Deloitte Ireland: One of the Big Four audit, tax, and advisory firms operating across Ireland and Northern Ireland, providing direct competition for Grant Thornton across all three service lines and especially in large-cap audit and consulting.
• EY Ireland: Big Four audit, tax, and advisory firm with a large Dublin and Belfast footprint; competes with Grant Thornton for FTSE, PIE audit, and large corporate tax mandates across the island of Ireland.

Direct peers

• RSM Ireland: Global mid-tier audit, tax, and consulting network with operations across Ireland and Northern Ireland; comparable in scale, mid-market focus, and three-pillar service structure.
• Mazars Ireland: International mid-tier audit, tax, and advisory firm with operations in Ireland; directly comparable in client profile (mid-market corporates, listed entities, private clients) and service offering.
• BDO Ireland: Mid-tier accounting and advisory network with strong Ireland and Northern Ireland presence; the closest direct peer in target client (mid-market) and service mix (audit, tax, advisory).

Emerging players

• Moore Global: International accounting and advisory network with member firms in Ireland; positioned at the mid-market tier with comparable audit, tax, and consulting offerings.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/grant-thornton
• Xx.com/grantthorntonni

Revenue estimate

Valuation estimate

Number of profiles

Profiles17 records

Subsidiaries5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Grant Thornton