U.S. Expat is your trusted guide to life abroad — starting in Portugal and growing with you. We provide clear, practical information and access to expert partners across immigration, tax, lifestyle, and financial planning. Whether you’re preparing to move or already building a life overseas, we understand how overwhelming it can be to find reliable support across borders. That’s why we created a single destination where U.S. expats can find the guidance, tools, and local insight they need to move confidently, settle smoothly, and plan for the future — even if it leads back home.
James M. Cassidy, CPA
James M. Cassidy, CPA
Jim Cassidy, CPA (New York), is a Certified Public Accountant with more than 30 years of experience providing U.S. and international individual tax consulting and compliance services to internationally mobile executives, high-net-worth individuals, investors, and athletes and entertainers. His practice focuses on complex cross-border matters, including international tax planning, compliance, and cross-border pension and retirement planning.
Jim has spent the majority of his career with leading global public accounting firms and has lived and worked internationally, including several years in Mexico City and Toronto, where he advised clients on both local and U.S. tax matters. This firsthand international experience informs his practical, risk-aware approach to advising globally connected individuals and families.
Jim previously served as Chairman of the International Tax Committee of the New York State Society of Certified Public Accountants, is a Member of the AICPA, and currently serves as Treasurer of the U.S.–Mexico Chamber of Commerce in New York.
Resources
Expat Wealth Planning: Focus On A Tax-Smart Asset
For expatriate clients, wealth planning can feel like a balancing act across multiple borders. Tax laws differ, reporting requirements overlap, and investments that work well in one country can create complications in another. That’s why many globally mobile families can benefit from a powerful but often overlooked solution: permanent life insurance.
Ownership Of A Qrops - A Practical Guide For Meeting Your U.S. Tax Compliance Obligations
This memorandum is intended for U.S. members of the STM Malta Pension Plan, a Qualifying Recognized Overseas Pension Scheme (QROPS) established under Maltese law.
U.S. Expats In Portugal - Put More Money Back In Your Hands With A Smarter Tax Strategy
If you’re a U.S. citizen or permanent resident (“green-card” holder), small business owner or a high-earning professional living in Portugal, smart tax planning can help you keep more of what you earn, on both sides of the Atlantic.




