Mayo Law Blur

Business and corporate law

Practical legal counsel for the work that keeps your business moving.

Whether you're incorporating, negotiating contracts, closing a deal, protecting IP, or navigating a cross-border matter, Mayo Law's business lawyer Toronto team helps founders, SMEs, and growing companies handle the legal side without slowing down the business.

5 star reviews

Credentials and experience

Mayo Law Blur

How we can help

The legal work that comes up at every stage — from incorporation to your next deal.

Most businesses don't need just one kind of lawyer. They need someone who can incorporate the company, draft the agreements, handle the deals, protect the IP, and step in as outside counsel when the harder questions come up. We do all of it.

Mayo Law works with founders, startups, small and mid-sized businesses, and established companies on the everyday corporate work that keeps the business running and the higher-stakes matters that shape what comes next. We act as transactional counsel for specific deals, as fractional general counsel for ongoing legal needs, and as cross-border counsel when your business has reach into the United States and beyond.

Mayo Law Blur

Who we work with

From first incorporation to the next round and beyond.

Startups and founders

Incorporation, founder agreements, equity splits, fundraising paperwork, IP protection, and the early-stage legal work that sets the foundation for everything that comes next.

Small and mid-sized businesses

Contracts, employment matters, compliance, IP, and ongoing counsel — without the cost of a full in-house legal team.

Growing and established companies

M&A, corporate restructuring, complex contracts, cross-border deals, and fractional general counsel for legal work that doesn't fit a single transaction.

Mayo Law Blur

Why choose us?

Supporting global ambitions so you can grow with confidence.

01

Proven track record

We’ve helped businesses navigate complex regulatory and legal challenges, providing practical solutions and strategic guidance to protect their operations and support growth.

02

Personalized attention

We believe in building strong relationships with our clients, offering tailored legal strategies to meet your unique needs.

03

Expertise you can trust

With years of experience and deep knowledge of the complex legal landscape surrounding cross-border business, we are dedicated to your growth in global markets.

Mayo Law Blur

About us

We’ve handled 200+ cases with 10+ years of international business experience.

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Mayo Law Blur

Client success

“Joseph explained every step of the legal process in a clear and straightforward manner. I always felt informed and at ease. His professionalism and dedication gave me confidence that my case was in the right hands. I highly recommend his services to anyone seeking legal assistance.”

“Working with Joseph Mayo was a fantastic experience. He is incredibly knowledgeable and efficient, helping me with important files that needed quick submission. His expertise and dedication were evident, and he guided me through the process in record time. I’m grateful for his prompt and thorough assistance. Highly recommended for anyone needing legal expertise!”

“Joseph’s the kind of lawyer who actually listens. I never felt like just a file on his desk—he really took the time to understand me and what I was going through. It made the whole experience a lot less stressful. I’m honestly so glad I found him.”

Questions & Answers

What does an international business lawyer do?

An international business lawyer advises companies operating across borders on the legal layer of their cross-jurisdictional work — including contracts that span multiple legal systems, mergers and acquisitions involving foreign parties, intellectual property protection in multiple countries, corporate structuring to optimize tax and regulatory treatment, import and export compliance, foreign market entry, and disputes that span more than one jurisdiction. The role is part legal advisor, part strategic counsel, and part coordinator across local counsel in each relevant country.

Yes, and this is the core of our international business practice. Because Mayo Law is licensed in both Ontario and New York, US-Canada cross-border work happens inside one firm — corporate structuring, contracts, M&A, immigration coordination for relocated executives, real estate for US-based property holdings, tax planning coordination, and compliance programs across the two jurisdictions. Most clients come to us specifically because they want to avoid the duplicate-firm, two-time-zone coordination cost.

Establishing a US presence involves several layers: choosing the right entity type (typically a Delaware C-corp or LLC, sometimes a state-specific entity), state-of-registration analysis, EIN registration with the IRS, opening US bank accounts and payment infrastructure, structuring the parent-subsidiary relationship to optimize tax treatment (transfer pricing, treaty benefits, withholding), employment law compliance for US-based hires, immigration strategy for relocated executives, and ongoing corporate maintenance. Each layer has Canadian-side implications that should be planned together rather than sequentially.

IP protection is fundamentally jurisdiction-specific — a Canadian trademark does not protect you in the U.S. or in the EU. International IP strategy typically involves national or regional filings (CIPO in Canada, USPTO in the United States), use of international treaties like the Madrid Protocol for trademarks and the Patent Cooperation Treaty for patents, contractual protections in distribution and licensing agreements, and enforcement strategy when infringement is discovered. We help clients identify which countries warrant filings based on actual or planned commercial activity, and coordinate with foreign IP counsel where needed.

Cross-border M&A involves a buyer and target located in different countries — for example, a Canadian acquirer buying a US-based business, or vice versa. The added complexity comes from multi-jurisdictional regulatory approval (Investment Canada Act review on the Canadian side, CFIUS review for sensitive US sectors), foreign tax structuring of the deal, currency and FX considerations, employment law differences in transitioning employees, IP transfer mechanics, and post-closing integration across two corporate systems. We coordinate the legal side of these transactions for buyers and sellers.

Trade compliance covers a broad range of cross-border concerns — including USMCA rules of origin, harmonized tariff schedule classification, country-of-origin marking requirements, export controls (ITAR and EAR in the US, the Export and Import Permits Act in Canada), and sanctions compliance (OFAC, Canadian autonomous sanctions). The risk of getting this wrong includes import seizure, retroactive duties, and criminal liability for sanctions violations. We work with clients to build trade compliance programs and respond to specific shipments and audits.

Yes. International contracts involve specific drafting considerations that domestic agreements often don’t — choice of governing law, choice of forum or arbitration, language of the contract, currency of payment, force majeure provisions that account for cross-border events, IP licensing terms that work in multiple jurisdictions, and compliance with both parties’ local regulatory requirements. We draft and review distribution agreements, supply contracts, licensing agreements, joint venture agreements, and other cross-border commercial documents.

Cross-border work typically requires coordination across two firms — one in each country — with handoffs, duplicate intake, and gaps in strategy. Mayo Law operates on both sides of the border under the same firm: Mayo Law PC in Ontario and Joseph Mayo PLLC in New York. The Canadian and US legal pieces of a transaction or matter happen inside one team rather than across three firms, which reduces friction, cost, and the risk of strategic mismatches between counsel.

Mayo Law Blur

Get in touch

Take your business beyond borders—strategically and securely.

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