HaysMac
HaysMac is a London-headquartered chartered accountancy firm founded in 2001, providing audit, tax, advisory, transaction, outsourcing, and US/UK cross-border tax services to UK entrepreneurs, high-net-worth individuals, and over 800 charities across twelve specialised sectors.
- Company typePrivate
- Founded2001
- HeadquartersLondon, United Kingdom
- Headcount501–1,000
- GTM typeB2B
- OfferingServices
What HaysMac does
HaysMac LLP is a London-headquartered chartered accountancy firm founded in 2001, delivering audit, tax, advisory, outsourcing, risk assurance, company secretarial, and transaction services. The firm rebranded from haysmacintyre to HaysMac in 2024 and celebrated its 25th anniversary in January 2026. With a headcount of 501-1,000 staff, it operates as a privately held limited liability partnership with no parent company or external private equity ownership disclosed. Three wholly owned subsidiaries — HaysMac Corporate Finance Limited, Ely Place Administration Services Limited, and HaysMac IT Consultants Limited — support the operating structure, alongside the recently acquired Green Square corporate finance brand (May 2026) and Moore DM US tax team (February 2026).
The firm operates a partner-led advisory model with deep sector specialisation across twelve verticals: charities and social purpose, education, financial services, FinTech, hospitality, life sciences, media/marketing/advertising, professional institutes and membership bodies, property, retail and eCommerce, sports and leisure, and technology. It serves three primary client segments — entrepreneurs and private businesses, high-net-worth individuals and families, and charities and social-purpose organisations (over 800 UK and international charity clients) — plus secondary segments in financial services, education, private equity, and equity capital markets. Services are organised as core practices (Audit, Tax, Outsourcing, Risk Assurance & Advisory, Transaction Services, Company Secretarial) with Tax further decomposed into Business Tax, Private Client Tax, Employer Solutions, Employment Tax, Inheritance Tax, R&D Tax Relief, Share Schemes, Strategic Tax Support, Tax Disputes, VAT, and a recently added US Tax Services line.
Revenue is generated entirely on a professional-services, quote-based engagement model with fees set per scope, complexity, and client requirements; no subscription or productised pricing is disclosed. GTM motion is enterprise field sales conducted via direct partner-led relationships, supported by thought leadership content marketing, email newsletters segmented by practice area, sector events (including the Premier Sports Network partnership), and a LinkedIn-led organic presence. The firm holds GDPR compliance and Authorised Corporate Service Provider (ACSP) status and operates from a single London office at 10 Queen Street Place while serving UK and EMEA clients, with growing international reach into US/UK cross-border tax.
HaysMac firmographics
Firmographics- Name
- HaysMac
- Legal name
- HaysMac LLP
- Website
- https://haysmac.com
- Company type
- Private
- Founded year
- 2001
- Operating status
- Operating
- Headcount range
- 501–1,000 employees
- Short description
- HaysMac is a London-headquartered chartered accountancy firm founded in 2001, providing audit, tax, advisory, transaction, outsourcing, and US/UK cross-border tax services to UK entrepreneurs, high-net-worth individuals, and over 800 charities across twelve specialised sectors.
- Ownership category
- akta.pro rank
Where HaysMac is headquartered
LocationHeadquarters
- HQ city
- London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
HaysMac business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure
Revenue model
- Audit and Assurance Services: Statutory audits, voluntary audits, assurance reviews, USAID audits, and employer covenant reviews for clients across various sectors.
- Tax Advisory Services: Business tax, employer solutions, employment tax, inheritance tax, private client tax, R&D tax relief, share schemes, strategic tax support, tax disputes and resolutions, and VAT services.
- Transaction Services: Corporate finance advisory, M&A due diligence, transaction advisory, and reporting accountant services for IPOs on LSE AIM.
- Outsourcing Services: Accounting outsourcing, company secretarial, and business support services.
- Risk Assurance and Advisory: Internal audit, governance reviews, risk management, and control assessments.
Go-to-market motion1 record
Distribution channels2 records
Marketing channels6 records
HaysMac product offering
Product offeringCore offering
HaysMac is a UK chartered accountancy firm delivering audit, tax, transaction, outsourcing, risk assurance and corporate finance advisory services to businesses, charities, not-for-profit organisations and private clients. Services are organised by sector (charities, education, hospitality, technology, financial services, media, FinTech, property, sports, life sciences, retail/eCommerce, professional institutes) and by market (entrepreneurs/private businesses, equity capital markets, international, private equity, private wealth), with partner-led delivery from its London office.
Product overview
HaysMac is an award-winning chartered accountancy, tax, and advisory firm offering a unified portfolio of professional services. The core offering comprises Audit, Tax (with multiple sub-services including Business Tax, Private Client Tax, Employer Solutions, Employment Tax, Inheritance Tax, R&D Tax Relief, Share Schemes, Strategic Tax Support, Tax Disputes & Resolutions, and VAT), Outsourcing, Risk Assurance & Advisory Services, Transaction Services, Company Secretarial, and Green Square Corporate Finance (an acquired specialist M&A advisory brand). Services are delivered across sector specialisms including Charities, Education, Financial Services, FinTech, Hospitality, Life Sciences, Media/Marketing/Advertising, Property, Retail & eCommerce, Sports & Leisure, Technology, and Social Purpose organisations.
Differentiator
Problem solved
Functional benefit
Brands
- Green Square Corporate Finance: Corporate finance advisory service specializing in M&A transactions for marketing, media, and technology sectors
Products and services
- Audit Statutory and voluntary audit services for businesses, charities and not-for-profit organisations with sector-specific expertise spanning charity audit, USAID audits, employer covenant reviews, assurance reviews and AIM-listed company audits.
- Tax Full spectrum tax advisory and compliance services including business tax, employer solutions, employment tax, inheritance tax, private client tax, R&D tax relief, share schemes, strategic tax support, tax disputes and resolutions, and VAT services.
- Transaction Services Due diligence, transaction support, M&A advisory and reporting accountant services for mergers, acquisitions, disposals and IPOs on the LSE AIM market.
- Outsourcing Comprehensive outsourcing services including accounting function management and business support for clients seeking external finance function delivery.
- Risk Assurance & Advisory Services Internal audit, governance reviews, risk management and control assessments for organisations across sectors.
- Company Secretarial Statutory compliance, Companies House filings, corporate restructures and registered office services for UK companies.
- Green Square Corporate Finance Specialist corporate finance advisory focused on M&A transactions, with cross-border transaction expertise across marketing, media and technology sectors.
- US Tax Services US tax compliance services for US nationals and high-net-worth individuals living in the UK, delivered from London via the acquired Moore DM US tax team.
- Private Client Tax Tax planning and compliance for high-net-worth individuals, families, entrepreneurs, business owners, private equity executives, professional sportspeople and family offices, including inheritance tax, trusts and complex UK and international tax matters.
Quantifiable outcome
- More than 800 UK and international charities and social purpose organisations served
- +3 more outcomes
Companies that use HaysMac
Customer profileNamed customers4 records
Segments8 records
Ideal customer profiles4 records
HaysMac technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
HaysMac partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Premier Sports NetworkminorHaysMac has renewed its partnership with Premier Sports Network, participating in sports industry events and providing advisory services to the sports sector.
Scale indicators2 records
Recent moves6 records
Expansion highlights5 records
HaysMac competitors and assessment
Company assessmentDirect peers
- Grant Thornton UK: Grant Thornton UK is a leading mid-tier accounting and advisory firm serving mid-market, private equity-backed and listed companies. Overlap with HaysMac is strongest in audit, transaction services and equity capital markets for owner-led businesses.
- Crowe UK: Crowe UK is a mid-tier chartered accountancy firm with particular strength in the charity and not-for-profit sector, directly mirroring HaysMac's flagship vertical. It also offers audit, tax and advisory services to owner-managed businesses, making it a very close peer.
- Saffery Champness: Saffery Champness is a UK mid-tier firm with strong private client, landed estates and not-for-profit practices. It competes directly with HaysMac in private wealth, charities and owner-managed business audit and tax.
- RSM UK: RSM UK is a mid-tier audit, tax and consulting firm with strong sector specialisation in owner-managed businesses, financial services and not-for-profits. It competes head-to-head with HaysMac in charity audit and mid-market advisory.
- BDO UK: BDO UK is a mid-tier chartered accountancy firm providing audit, tax and advisory services to mid-market and owner-managed businesses. It directly competes with HaysMac across virtually all service lines and sector verticals, including charities, financial services and private equity.
- PKF Smith Cooper: PKF Smith Cooper is a UK mid-tier chartered accountancy offering audit, tax and advisory to owner-managed and mid-market businesses. Comparable to HaysMac in size and target client base, especially in the Midlands and East of England.
- Mazars UK: Mazars UK is a mid-tier audit, tax and advisory firm serving SMEs, large corporates and not-for-profits. Direct competitor to HaysMac across audit, tax compliance and transaction services for mid-market clients.
- Moore Kingston Smith: Moore Kingston Smith is a UK mid-tier accountancy firm with a strong charity, not-for-profit and private client practice. Closely comparable to HaysMac in size, sector mix and partner-led service model.
- MHA (Baker Tilly): MHA is a UK top-15 accountancy group offering audit, tax, advisory and outsourcing services to mid-market clients. It overlaps with HaysMac in owner-managed businesses, financial services and the not-for-profit sector.
Broad incumbents
- Forvis Mazars: Forvis Mazars is the international top-10 audit and advisory network behind Mazars UK. It competes with HaysMac across larger audit, tax and transaction mandates and provides the global platform that mid-tier peers like HaysMac do not have at scale.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
HaysMac social profiles
Digital presenceHaysMac compliance and trust
Trust signalCompliance2 records
HaysMac financial estimates
Financial estimateRevenue estimate
Valuation estimate
HaysMac leadership team
Management profileNumber of profiles
Profiles26 records
HaysMac subsidiaries and ownership
Company hierarchySubsidiaries4 records
HaysMac funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
HaysMac M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about HaysMac
What does HaysMac do?
HaysMac is a UK chartered accountancy firm delivering audit, tax, transaction, outsourcing, risk assurance and corporate finance advisory services to businesses, charities, not-for-profit organisations and private clients. Services are organised by sector (charities, education, hospitality, technology, financial services, media, FinTech, property, sports, life sciences, retail/eCommerce, professional institutes) and by market (entrepreneurs/private businesses, equity capital markets, international, private equity, private wealth), with partner-led delivery from its London office.
Is HaysMac a public or private company?
HaysMac is a private company. It is classified as management employee owned and is currently operating.
When was HaysMac founded?
HaysMac was founded in 2001. It employs 501 to 1,000 people.
Where is HaysMac based?
HaysMac is headquartered in London, United Kingdom, in the Europe region.
How does HaysMac make money?
Five revenue lines are on record. Audit and Assurance Services are the primary driver. The others are tax Advisory Services, transaction Services, outsourcing Services and risk Assurance and Advisory.
Who are HaysMac's main competitors?
Direct peers on record are Grant Thornton UK, Crowe UK, Saffery Champness, RSM UK, BDO UK, PKF Smith Cooper, Mazars UK, Moore Kingston Smith and MHA (Baker Tilly). Forvis Mazars is listed as a broad incumbent.
Does HaysMac have an API?
No public API is recorded for HaysMac.