Derren Hayden Joseph, Managing PartnerHeadquartered in Singapore, HTJ. Tax specializes in U.S. cross border tax compliance, and international tax planning. Founded in 1980, the firm operates as part of Moores Rowland International (MRI), a global professional services network with roots dating back to 1866. This allows HTJ.Tax to combine specialized U.S. cross border tax expertise with regional advisory capabilities in key APAC markets and a broader international network.
The network provides access to coordinated support across tax, accounting, audit, corporate secretarial, compliance, cybersecurity, digital forensics and advisory services, all aligned with international standards. Its multicultural and multilingual professionals work across time zones and jurisdictions, helping HTJ.Tax avoid the gaps that can arise from isolated advice, whether in treaty interpretation, local compliance, language nuance, or continuity of service.
“International tax planning cannot be approached from a single-country perspective,” says Derren Hayden Joseph, Managing Partner at HTJ.Tax and Chair of the Tax Working Group at Moores Rowland International (MRI). “Effective outcomes require qualified professionals in multiple jurisdictions working together to create solutions that reflect the realities of an increasingly interconnected world.”
For businesses entering or expanding within the US-Asia corridor, early structural decisions can determine how smoothly they operate later. Entity formation, complex compliance requirements, transfer pricing policies and local reporting obligations influence tax optimization strategy, and commercial flexibility.
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International tax planning cannot be approached from a single-country perspective. Effective outcomes require qualified professionals in multiple jurisdictions working together to create solutions that reflect the realities of an increasingly interconnected world.
HTJ.Tax treats tax optimization and corporate structuring as one integrated strategy for businesses operating in the U.S. and Asia. Combining U.S. tax expertise with MRI’s local market capabilities, helps clients design tax-efficient, legally defensible holding and operating structures aligned with their business goals. It also provides accounting outsourcing and coordinated compliance support so those structures function effectively in day-to-day operations.
Guiding Individuals Through Residency and Wealth Decisions
For individuals, HTJ.Tax services include pre-migration tax planning, asset protection and estate planning. The goal is to help clients plan their residency, wealth and compliance obligations together instead of handling each decision separately.
For U.S. citizens and green card holders abroad, this includes managing continuing U.S. reporting obligations alongside the tax rules of the country where they live, invest or operate.
HTJ.Tax’s approach is reflected in an indicative scenario involving a U.S. citizen in the UK who is building an AI business and planning to spend more time in Singapore. He must navigate tax obligations in multiple jurisdictions while also considering how residency, business ownership, income flows and a future exit could affect his overall tax position.
For families without U.S. tax exposure, HTJ.Tax can use a broader range of legal, cross-border trust structures to strengthen asset protection and ensure appropriate visibility to relevant tax authorities.
Keeping Strategies Current as Rules Evolve
Cross-border tax planning does not end once a structure is created or a relocation is completed. Legislative reforms, regulatory developments and treaty interpretations can change the assumptions behind earlier decisions.
HTJ.Tax supports clients through ongoing education, proactive communication and periodic strategy refinement. Feedback from clients, recurring advisory discussions and regulatory monitoring help shape its service delivery and educational resources. Continuous engagement keeps clients informed of regulatory changes before they affect existing structures, filing positions or expansion plans.
As international mobility and commerce continue to blur traditional tax boundaries, HTJ.Tax helps clients turn cross-border complexity into structures that support growth, protect wealth and remain resilient over time.
