Expand Beyond Boundaries.
Succeed Across Borders.
We provide expert international tax strategies and global accounting solutions to help businesses cut costs, increase revenue, and confidently scale across borders.
Building a Global Business can be complex.
GTSU simplifies international tax complexities and provides expert guidance and tailored solutions to help businesses and expats minimize liabilities, maximize growth, and achieve financial success across borders.
Offshore Accounting & Tax Services
Streamline your financial operations and minimize your global tax burden with our comprehensive offshore accounting services, designed with international tax laws in mind.
International Tax Planning
Navigate the complexities of international tax laws with our expert guidance. We'll help you develop a tax-efficient strategy for your global business or personal finances.
Business Expansion & Structuring
Expand your business globally with confidence. We'll advise you on the most tax-efficient structures and strategies for international growth, ensuring it aligns with your long-term business goals.
Why Choose GTSU™
Expertise
Our team of seasoned professionals possesses deep knowledge of international tax laws and regulations.
Personalized Solutions
We tailor our strategies to your unique needs and goals, ensuring optimal results.
Global Reach
We have experience working with clients in various countries and understand the nuances of different tax systems.
Proven Results
We have a track record of helping clients achieve significant tax savings and financial success.
THE GTSU™ ADVANTAGE
Why Businesses and Expats Choose Us
GTSU™
Others
Specialized in International Tax Law
Offshore Accounting Expertise
Cost-effective Solutions
Dedicated Account Managers
Personalized, Tailored Strategies
Proactive Tax Planning
Global Reach and Understanding of Various Tax Systems
Secure, Cloud-based Client System
Transparency and Ethical Practices
Experience with Diverse Business Structures and Industries
Focus on Business Growth and Long-term Success
THE GTSU™ ADVANTAGE
Why Businesses and Expats Choose Us
GTSU™
Others
Specialized in International Tax Law
Offshore Accounting Expertise
Cost-effective Solutions
Dedicated Account Managers
Personalized, Tailored Strategies
Proactive Tax Planning
Global Reach and Understanding of Various Tax Systems
Secure, Cloud-based Client System
Transparency and Ethical Practices
Experience with Diverse Business Structures and Industries
Focus on Business Growth and Long-term Success
What Our Clients Say
"Michael Mertz, CPA, eMBA, and his team successfully tackled a tough situation in Hong Kong, where I am inappropriately paying taxes in HK, and was told that a refund wasn't possible. But through their efforts, a refund of over $50,000 was secured."
Josh D.
Hong Kong
"They are really proactive, accommodating and a pleasure to work with. It really gives me the peace of mind to know that I entrusted this work to the right company. He is an important partner in my business."
Jeff L.
Thailand
"Searching for a competent and professional tax service has always been difficult for me in Asia. It was extremely important that I catch up on my taxes and I feel relieved that we are nearing a conclusion of what had previously been difficult and time-intensive to accomplish."
Chris M.
Asia
"The process from NDA’s to Engagement Letter to Skype consultation to a in person meeting in Tokyo was very smooth and easy. I would recommend to use him for your US tax prep and any other tax-related or accounting questions. "
Rob P.
Tokyo
"Michael Mertz, CPA, eMBA, and his team successfully tackled a tough situation in Hong Kong, where I am inappropriately paying taxes in HK, and was told that a refund wasn't possible. But through their efforts, a refund of over $50,000 was secured."
Josh D.
Hong Kong
"They are really proactive, accommodating and a pleasure to work with. It really gives me the peace of mind to know that I entrusted this work to the right company. He is an important partner in my business."
Jeff L.
Thailand
"Searching for a competent and professional tax service has always been difficult for me in Asia. It was extremely important that I catch up on my taxes and I feel relieved that we are nearing a conclusion of what had previously been difficult and time-intensive to accomplish."
Chris M.
Asia
"The process from NDA’s to Engagement Letter to Skype consultation to a in person meeting in Tokyo was very smooth and easy. I would recommend to use him for your US tax prep and any other tax-related or accounting questions. "
Rob P.
Tokyo
Meet the Experts
Michael A. Mertz, CPA, EMBA
Co-Founder
Chase D. Morris
Co-Founder
Anne Cachero-Aglasi, CPA
Co-Founder
Expand Beyond Boundaries.
Succeed Across Borders.
Contact