By Mowery & Schoenfeld
Author: Ricardo Aramburo Williams, International Tax Principal
For non-U.S. executives, relocating to the United States, whether for business or personal reasons, represents a meaningful opportunity, but also significant tax complexity. From compensation structuring and asset reporting to potential exit taxes in the home jurisdiction, the scope of considerations can be substantial. Taking steps early to coordinate with experienced cross-border advisors helps manage both pre- and post-move implications effectively.
Substantial Presence Test
The first question is a matter of whether U.S. tax residency is an option. This determination is often governed by the substantial presence test, which is met if the executive is physically present in the United States for:
- 31 days during the current tax year, and
- 183 days during the current year and the two preceding years, calculated using a weighted formula (all days in the current year, 1/3 of days in the first preceding year, and 1/6 of days in the second preceding year).
Meeting this test generally results in U.S. tax residency, subjecting the executive to U.S. taxation on worldwide income.
In cases where an executive may be considered a tax resident in both the United States and their home country, applicable income tax treaties often provide “tiebreaker” rules. These rules assess factors such as permanent home, center of vital interests, habitual abode, and nationality to determine primary residency.
Dual residency and tiebreaker rules
Executives from countries that have income tax treaties with the U.S. can sometimes be considered residents of both nations simultaneously, known as dual residency. To address this issue, most of these treaties include “tiebreaker” rules that establish which taxing jurisdiction has primary residency status for tax purposes. These rules generally consider factors including permanent home, center of vital interests (read: where their personal and economic ties are strongest), habitual abode (read: where they actually live), and nationality. These tests can create a space for the individual to “overrule” the general substantial presence test rule.
Worldwide Taxation vs. Territorial Taxation
The U.S. follows a worldwide taxation system, in contrast to the territorial regimes common in many other jurisdictions. As a result, all residents’ income, regardless of source, is subject to U.S. federal income tax. This includes employment income, investment returns, rental income, and gains from the disposition of non-U.S. assets.
For executives transitioning from territorial systems, this shift can materially affect both tax exposure and planning strategies. The timing of income recognition, compensation structuring, and asset dispositions should be evaluated carefully in advance of relocation.
Importantly, U.S. tax compliance obligations extend beyond income. U.S. residents are required to report certain foreign financial accounts and assets annually, including interests in foreign bank accounts, investment portfolios, and other financial holdings. Non-compliance carries significant penalties, making proactive planning essential.
Reporting foreign income and assets
U.S. tax residents must report income from foreign sources, including wages, interest, dividends, capital gains, rental income, and even certain retirement plans. Reporting rules also apply to foreign bank accounts and financial assets, with a series of forms that should be completed with income tax returns. A good international tax advisor can ensure you’re not only paying the proper amount of tax (and not more), but also complying with the complex system of reporting rules, avoiding costly audits and penalties.
Taxation of executive compensation
The structure of executive compensation — salary, bonuses, stock options, deferred compensation, and benefits — can have different tax treatments depending on residency status and sourcing rules. Contact a tax professional to determine the proper sourcing prior to moving.
Salary and bonuses
When a U.S. tax resident earns a base salary and cash bonuses, the income is generally subject to U.S. tax regardless of the country where they payments were made. Compensation earned before becoming a U.S. tax resident may remain taxable in the executive’s home country. Legal and international tax professionals can help with sourcing income as part of your pre-move planning process.
Equity compensation
Stock options, restricted stock units (RSUs), and similar awards can add nuance and complexity for boundless leaders. The U.S. taxes equity compensation based on the period over which it is earned (grant, vesting, and exercise dates) and the executive’s residency during these periods. Carefully tracking grant dates, vesting schedules, and exercises will help ensure income is taxed when and where it should be.
Deferred compensation and foreign retirement plans
Deferred compensation arrangements and foreign pensions are very common in the global executive community. The U.S. tax treatments for these can differ from those in the home country, potentially triggering earlier income recognition or eliminating tax benefits. While tax treaties may offer some relief, a thorough analysis is important to help avoid unintended consequences.
State and local taxes (SALT)
The U.S. federal tax system is further complicated by state and local taxes. State residency is often based on physical presence, but specific criteria differ significantly by state. States such as California and New York are known for high taxes and aggressive enforcement, making it especially important for executives to plan ahead, either to avoid double taxation or take advantage of credits for foreign taxes paid.
Social Security and Medicare
Most U.S. tax residents are subject Social Security and Medicare taxes on earned income. Certain countries have “totalization agreements” with the U.S., which exist to help prevent duplicate contributions and align eligibility for retirements across borders. These agreements should be reviewed in detail to understand the specific benefits available to an executive under each applicable treaty. Without these agreements, global executives may end up paying into multiple programs. U.S. legal and tax professionals are key in property interpreting, understanding, and applying these treaties to maximize benefits and minimize taxes when relocating.
Exit taxes and departure planning
Moving to the U.S. may trigger exit taxes in the executive’s home country, especially for those deemed “covered expatriates” or high-net-worth individuals. Careful pre-departure planning, including realizing capital gains, accelerating deductions, and restructuring assets, can minimize tax costs.
Estate and gift tax implications
Becoming a U.S. tax resident can expose your global assets to U.S. estate and gift taxes, which can be broader than in many other jurisdictions, with distinct thresholds, rates, and rules, especially for non-citizens. Proactive review of estate plans, trust documents, and beneficiaries and restructuring can help preserve wealth and minimize tax.
Special considerations for families
Tax residency often pulls spouses and dependents of global executives into the U.S. tax net as well. Family income, foreign trusts, education costs, and real estate all need to be reassessed under U.S. rules. International families should keep in mind gift tax exposure and reporting obligations for assets held by children, too.
Tax planning strategies
Given the complexity of international relocation, proactive tax planning is vital:
- Review and restructure foreign investments and trusts prior to moving or receiving a green card.
- Consider timing of income realization, especially for equity compensation and deferred pay.
- Seek professional advice on treaty benefits to avoid double taxation.
- File all required U.S. and foreign tax returns and disclosures.
- Address estate and gift tax exposures early, especially for large estates.
- Coordinate with advisors in both home and host countries for holistic planning.
Common pitfalls and risks
Executives often underestimate the requirements of U.S. tax rules. Common mistakes include:
- Failure to report foreign financial accounts and investments, leading to severe penalties.
- Inadvertently triggering double taxation by not leveraging treaty benefits.
- Misunderstanding treatment of equity compensation upon relocation.
- Neglecting state and local tax exposures.
- Overlooking estate and gift tax consequences for family wealth.
Conclusion
Relocation to the United States can be a pivotal step in an executive’s career, but it brings a complex and far-reaching tax landscape to navigate. A clear understanding of residency rules, reporting obligations, and the interaction between U.S. and foreign tax systems is essential.
With early planning and the right advisory support, executives can mitigate risk, optimize outcomes, and transition with confidence, protecting both personal wealth and broader organizational interests.
