International
A truly global reach through MSI Global Alliance.
At HaysMac, we don’t just work internationally - we’re built for it.
As a co-founder and co-owner of MSI Global Alliance, we’re part of a powerful global infrastructure of more than 250 independent legal and accounting firms across 100+ countries. Together, that’s over 19,000 lawyers and accountants on the ground around the world, ready to support ambitious, internationally active businesses.
What does that mean for you? Seamless global support, delivered through a single, trusted UK contact. Whether you’re expanding overseas, managing cross-border tax issues, coordinating international audits, or handling complex regulatory challenges, we can quickly connect you with trusted local experts who already work closely with us.
We’re at the heart of the alliance, with three HaysMac partners sitting on the MSI board helping to shape its strategy. The relationships we have with member firms are real and long-standing, built on years of collaborating on shared clients and solving international challenges together.
MSI member firms are highly respected, English-speaking, full-service practices in their local markets. Like us, they believe in partner-led advice, commercial thinking, and delivering real value. That shared mindset makes cross-border work smoother, faster and more effective.
With over $2.2bn of combined revenue, we are ranked as the eighth largest professional services alliance in the world. MSI gives our clients the confidence that wherever business takes them, we have the right people there.
If you’re operating internationally – or planning to – we can introduce you to trusted MSI firms across Europe, North America and beyond, providing on-the-ground expertise and local insight exactly where you need it.
Why HaysMac?
Tax, audit, structuring, and transactions for both inbound and outbound companies
Growing your international footprint is a significant milestone, and it requires a partner with the expertise to match your ambitions. Businesses often partner with HaysMac when they reach a certain scale and need a firm with the services and expertise to support their growing international presence.
Through strategic recruitment, we have assembled a team that offers valuable experience in working for large international clients, and always with the personable service that our firm is known for.
We take pride in offering the comprehensive capabilities of a large accounting firm while maintaining the personalised service that is our hallmark. We bring a depth of knowledge and a commitment to your success that sets us apart.
We offer global audits for leading businesses that are headquartered in the UK and have significant interests overseas, and for international organisations that own important assets and businesses in the UK. We have strong experience working as group auditor or as a component auditor of a wider group.
Our sector specialism naturally lends itself to expertise in international markets
At HaysMac, we are well-equipped with specialist sector teams, equipped with the knowledge needed to help your business excel, offering insights that go beyond numbers. We are able to anticipate challenges and spot opportunities that are unique to your field.
Fast-growing clients in the creative, media, marketing, technology, fintech and retail sectors typically look to ‘go global’ early in their growth journey – often expanding into the US, Asia (via Singapore, Malaysia and Hong Kong), mainland Europe and the Middle East. We are adept at advising on their progress and guiding them through international expansion, M&A or global audits.
For businesses expanding into Europe and beyond, our VAT specialists support inbound trading from day one, advising on VAT registration requirements, supply-chain structuring and compliance, so growth is commercially efficient as well as compliant.
Our experts in tax structuring help UK clients – especially in the technology sector – achieve a seamless ‘Delaware Flip’ that will turbocharge their growth into lucrative US markets. We also assist fast-growth businesses in expanding their global presence through dual listings on the London Stock Exchange, alongside other global stock markets.
MSI Global Alliance gives clients access to local firms worldwide
Our advantage in international markets stems from our ownership of MSI Global Alliance (MSI), a leading international association of 250 local accountancy and law firms across more than 100 countries, that was co-founded by HaysMac, with firms hand-picked for being the best at what they do.
MSI in numbers
As a leading international accounting firm, we deliver comprehensive solutions for even the most complex accountancy and tax challenges. Whether you require international tax planning, multi-jurisdictional compliance, or seamless financial services, HaysMac can provide help, with our vast pool of specialised knowledge, tailored for every client.Our scale and influence are a testament to our success:
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8th largest professional alliance globally
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Active in 100+ countries
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$2bn revenue globally
Tax jurisdictions
For clients in the property and financial services sectors, we are accustomed to working with tax jurisdictions such as Jersey, Guernsey, the Cayman Islands and the British Virgin Islands (BVI). We are also experienced in helping private clients navigate the complex non-dom rules in the UK.
A trusted partner
Co-founder and co-owner of MSI Global Alliance
MSI is one of the world's leading international associations of independent legal and accounting firms providing access to a wide network of professional advisers to assist you wherever your business activities take you.
It’s rare to find expertise at every level of an accountancy firm. We like being a bit different at HaysMac. Meet the team member who’s ready to talk shop.
Meet our team
Melanie Pittas
Senior Financial Services Partner
Andrew Barford
Partner
Jon Dawson
Partner, Head of Sectors & Markets
Key contact
Explore how our services can help you
Whether you're ready to start a conversation or simply have a question, we're here to help. We invite you to contact us today to learn how our collective strength can help you navigate your unique financial needs.
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