Sumer Northern Ireland
Sumer Northern Ireland is a Belfast-based chartered accountancy and business advisory practice, part of Sumer Group, serving SMEs across Northern Ireland with audit, tax, corporate finance, forensic, restructuring, and engineering-led R&D and Patent Box tax relief services.
- Company typePrivate
- Founded1996
- HeadquartersBelfast, United Kingdom
- Headcount51–100
- GTM typeB2B
- OfferingServices
What Sumer Northern Ireland does
Sumer Northern Ireland is a Belfast-headquartered chartered accountancy and business advisory practice serving small and medium-sized enterprises across Northern Ireland. The firm traces its history to the Belfast office of ASM Chartered Accountants, established around 1996, and was rebranded Sumer Northern Ireland in June 2024 when that office joined Sumer Group Holdings Limited, becoming the group's first Northern Ireland hub within a Top 15 UK accountancy practice of approximately 2,400 professionals. Following the merger, headcount grew roughly 20% to 120 by November 2024 and to approximately 130 by November 2025, with a stated ambition to add a further 100 staff over the subsequent three years. The firm is led by Managing Director Brian Clerkin alongside ten directors and a partner group.
Sumer NI operates as a full-service practice across eight interconnected service lines: audit and accounting, corporate finance, forensic accounting, hotels/tourism/leisure advisory, internal audit, restructuring and insolvency, R&D/Patent Box/land remediation tax relief, and tax. The principal technical differentiator is the Innovation Tax Relief team, staffed by engineers with domain expertise in aerospace, pharmaceutical, bio-medical science, microbiology and chemical/mechanical engineering, which is positioned to lead Sumer Group's R&D claims delivery across the entire UK. The practice holds ISO 9001 and ISO/IEC 27001 certifications and maintains long-standing collaborative relationships with Tourism NI and the NI Tourism Alliance, anchored by its 25-year Annual Hotel Survey.
The revenue model is professional services fee-for-engagement, with senior personnel involved across all client work and pricing typically structured around multi-year mandates. The firm explicitly does not undertake listed company engagements, concentrating instead on the Northern Ireland SME economy across sectors including haulage, hospitality, technology, manufacturing, energy and not-for-profit, with growing exposure to foreign direct investment clients through the wider Sumer Group network.
Sumer Northern Ireland firmographics
Firmographics- Name
- Sumer Northern Ireland
- Legal name
- Sumer Group Holdings Limited
- Website
- https://sumerni.co.uk
- Company type
- Private
- Founded year
- 1996
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Sumer Northern Ireland is a Belfast-based chartered accountancy and business advisory practice, part of Sumer Group, serving SMEs across Northern Ireland with audit, tax, corporate finance, forensic, restructuring, and engineering-led R&D and Patent Box tax relief services.
- Ownership category
- akta.pro rank
Where Sumer Northern Ireland is headquartered
LocationHeadquarters
- HQ city
- Belfast
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
Sumer Northern Ireland business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Others
Revenue model
- Audit and Accounting Services: Statutory audit, internal audit, and accounting services for SMEs, hospitality, manufacturing, technology and not-for-profit sectors
- Tax Advisory Services: Corporate tax compliance, personal tax, R&D tax relief, Patent Box and land remediation tax relief services
- Corporate Finance: M&A advisory, transaction support, and financial consulting for mid-market transactions
- Forensic Accounting: Loss of earnings quantification, pensions assessment, personal injury and medical negligence claims assistance
- Restructuring and Insolvency: Formal insolvency appointments and court appointments under applicable legislation
- Innovation Tax Relief Services: R&D and Patent Box claims preparation and submission, currently leading Sumer Group's UK-wide R&D services delivery
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Full-service accountancy offering with senior-led engagement |
Go-to-market motion3 records
Distribution channels2 records
Marketing channels9 records
Sumer Northern Ireland product offering
Product offeringCore offering
Sumer Northern Ireland provides comprehensive accountancy, audit, tax advisory, corporate finance, forensic accounting, restructuring/insolvency, and innovation tax relief services to SMEs across Northern Ireland. The firm operates across eight interconnected service disciplines, with a specialist engineering-led Innovation Tax Relief team that leads Sumer Group's UK-wide R&D claims delivery. It serves clients across public, private, and not-for-profit sectors with senior personnel directly engaged on all client work.
Product overview
Sumer Northern Ireland is a full-service accountancy and business advisory practice serving SMEs across Northern Ireland. The firm operates as a unified service offering across eight interconnected disciplines: Audit and Accounting, Corporate Finance, Forensic Accounting, Hotels/Tourism/Leisure Consultancy, Internal Audit, Restructuring and Insolvency, R&D/Patent Box Tax Relief, and Tax Services. The Innovation Tax Relief team, distinguished by its team of engineers with technical industry experience, leads the Sumer Group's R&D services across the UK. Following the firm's 2024 merger with the Sumer Group, the practice has expanded to approximately 130 staff while maintaining its client-centric, holistic approach with senior involvement on all engagements.
Differentiator
Problem solved
Functional benefit
Products and services
- Audit and Accounting
Quantifiable outcome
- R&D claims submitted for Northern Ireland totalled 1,305 for 2023/24 tax year, down 22% from 1,670 in 2022/23
- +3 more outcomes
Companies that use Sumer Northern Ireland
Customer profileNamed customers2 records
Segments6 records
Ideal customer profiles5 records
Sumer Northern Ireland technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature2 records
Sumer Northern Ireland partnerships and signals
Strategic signalPartnerships
13 partnerships are on record, tiered core and minor.
- Sumer GroupcoreParent company relationship. The Belfast office of ASM Chartered Accountants joined the Sumer Group in June 2024 to become Sumer Northern Ireland, serving as the group's first Northern Ireland hub and part of one of the UK's leading mid-market accountancy practices.
- ADS (Aerospace, Defence and Security)minorCorporate membership for business networking and industry representation
- CBI (Confederation of British Industry)minorCorporate membership for business advocacy and policy engagement
- Institute of Directors (IoD)minorCorporate membership for director development and business leadership resources
- Belfast Chamber of CommerceminorCorporate membership for local business networking and chamber events
- Northern Ireland Chamber of CommerceminorCorporate membership for regional business representation and networking
- Women in BusinessminorCorporate membership supporting women in business and professional development
- Tourism NIcoreLong-standing partnership through Sumer NI's Annual Hotel Survey (now in its 25th year), with Tourism NI CEO John McGrillen participating in survey launches and providing industry commentary
- NI Tourism AlliancecoreCollaboration with NI Tourism Alliance CEO Dr Joanne Stuart OBE on hotel sector survey findings and industry advocacy for sustainable tourism growth
- Visit BelfastminorCorporate membership supporting tourism promotion and Belfast destination marketing
- Linen Quarter BIDminorBusiness Improvement District membership for Belfast city centre regeneration
- NI Hospitality AssociationminorIndustry association membership for hospitality sector representation
- CO3 (Chief Officers 3rd Sector)minorMembership supporting third sector organisations and charity sector engagement
Scale indicators10 records
Recent moves7 records
Expansion highlights5 records
Sumer Northern Ireland competitors and assessment
Company assessmentDirect peers
- Mazars Northern Ireland: Mazars' Belfast office delivers audit, tax, and advisory services to mid-market and SME clients in Northern Ireland, providing direct head-to-head competition with Sumer NI across multiple service lines.
- Grant Thornton Northern Ireland: Grant Thornton's Belfast office offers audit, tax, and advisory services to mid-market clients in NI, directly competing with Sumer NI for SME and mid-market engagements across the same sectors.
- Crowe UK: Crowe UK operates a Northern Ireland presence as a Top 10 UK accountancy network, providing audit, tax, and advisory services to SME and mid-market clients in direct competition with Sumer NI.
- RSM Northern Ireland: RSM operates a Northern Ireland presence providing audit, tax, and consulting services to mid-market businesses, directly overlapping with Sumer NI's core SME service offering.
- BDO Northern Ireland: BDO's Belfast office provides audit, tax, and advisory services to Northern Ireland SMEs and corporates, directly competing with Sumer NI in the regional mid-market segment and for the same graduate and experienced-hire talent pool.
- ASM Chartered Accountants: ASM Chartered Accountants retains offices in Magherafelt, Dungannon, Newry, and Dundalk following the sale of its Belfast office to Sumer Group in June 2024, continuing as a direct regional competitor in Northern Ireland accountancy services.
Broad incumbents
- EY Northern Ireland: EY's Belfast office is a Big 4 firm providing assurance, tax, and advisory services; competes with Sumer NI for larger corporate, FDI, and innovation/R&D tax engagements in the Northern Ireland market.
- PwC Northern Ireland: PwC's Belfast office is a Big 4 firm offering assurance, tax, and consulting services; competes with Sumer NI for larger enterprise, FDI, and public-sector audit engagements in Northern Ireland.
- Deloitte Northern Ireland: Deloitte's Belfast office is a Big 4 firm with a full suite of audit, tax, and consulting services; competes with Sumer NI primarily for larger enterprise and FDI clients as well as for top graduate and experienced hires in the same NI talent pool.
- KPMG Northern Ireland: KPMG's Belfast office is a Big 4 firm offering audit, tax, and advisory services across Northern Ireland; competes with Sumer NI for enterprise and FDI mandates as well as senior professional hires, particularly in audit and tax.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
Sumer Northern Ireland social profiles
Digital presenceSumer Northern Ireland compliance and trust
Trust signalCompliance2 records
Sumer Northern Ireland financial estimates
Financial estimateRevenue estimate
Valuation estimate
Sumer Northern Ireland leadership team
Management profileNumber of profiles
Profiles9 records
Sumer Northern Ireland funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Sumer Northern Ireland M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Sumer Northern Ireland
What does Sumer Northern Ireland do?
Sumer Northern Ireland provides comprehensive accountancy, audit, tax advisory, corporate finance, forensic accounting, restructuring/insolvency, and innovation tax relief services to SMEs across Northern Ireland. The firm operates across eight interconnected service disciplines, with a specialist engineering-led Innovation Tax Relief team that leads Sumer Group's UK-wide R&D claims delivery. It serves clients across public, private, and not-for-profit sectors with senior personnel directly engaged on all client work.
Is Sumer Northern Ireland a public or private company?
Sumer Northern Ireland is a private company. It is classified as corporate owned and is currently operating.
When was Sumer Northern Ireland founded?
Sumer Northern Ireland was founded in 1996. It employs 51 to 100 people.
Where is Sumer Northern Ireland based?
Sumer Northern Ireland is headquartered in Belfast, United Kingdom, in the Europe region.
How does Sumer Northern Ireland make money?
Six revenue lines are on record. Audit and Accounting Services are the primary driver. The others are tax Advisory Services, corporate Finance, forensic Accounting, restructuring and Insolvency and innovation Tax Relief Services.
Who are Sumer Northern Ireland's main competitors?
Direct peers on record are Mazars Northern Ireland, Grant Thornton Northern Ireland, Crowe UK, RSM Northern Ireland, BDO Northern Ireland and ASM Chartered Accountants. Broad incumbents are EY Northern Ireland, PwC Northern Ireland, Deloitte Northern Ireland and KPMG Northern Ireland.
Does Sumer Northern Ireland have an API?
No public API is recorded for Sumer Northern Ireland.