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June 09, 2026
(Tax implications for U.S. residents and citizens versus non-resident, non-citizen investors, and why status, not the asset, drives the entire plan)
Two investors can hold the identical portfolio, the same U.S.- listed shares, the same Manhattan apartment. One dies and passes it on with little or no federal transfer tax. The other dies and watches up to 40% of the very same assets fall to U.S. estate tax above a $60,000 threshold. The difference is not the asset. It is a tax status. For globally mobile families, knowing which side of that line you sit on and why is the foundation for every subsequent structuring decision.
For income tax, a U.S. Person is a citizen, Legal Permanent Resident (LPR) (green card holder), or person meeting the substantial presence test. When dealing with estate tax and gift tax, however, the test is distinct, and often misunderstood, based on where a person intends to live permanently (subjective, facts and circumstances test as to intent - i.e., Domicile), not on the income tax test for residency. You can be a U.S. Income tax resident but not U.S. Domiciled, and vice versa. This gap is where many cross-border families miscalculate their exposure.
A U.S. person is taxed on worldwide income, regardless of its source. Such tax can be mitigated by the foreign earned income exclusion and foreign tax credits if they live abroad, thereby alleviating double taxation. A Non-Resident Alien (NRA) is taxed only on U.S.-source income that is effectively connected to a U.S. Trade or business (ECI). FDAP (Foreign dividends, interest, rents, and royalties), U.S.-source passive income, is typically subject to a flat withholding tax of 30% if there is no lower tax treaty. The important inequity is on capital gains; generally, there are no U.S. tax consequences for portfolio capital gains for an NRA, with one very important exception for capital gains with respect to U.S. real property. As per the Foreign Investment in Real Property Tax Act (FIRPTA), capital gains derived from U.S. Real properties are characterized as ECI, and the purchaser must withhold 15% of the gross sales price on account of the seller's ultimate tax liability.
This is where the two worlds diverge most drastically. While a U.S. Domiciliary has a "unified" (meaning a single amount usable against both gifts and estates) gift and estate tax exemption of $15 Million per person, which has been made permanent and indexed to inflation under the One Big Beautiful Bill Act (OBBBA) has undone the scheduled reversion to half of that sum, on the other hand, an NRA non-domiciliary only gets an estate tax exemption of $60,000 of U.S.- situs assets. Both the U.S. Domiciliary and the NRAs are taxed at rates up to 40% above the threshold.
Situs is everything
U.S. real estate and shares of U.S. corporations are considered U.S.-situs assets and thus are fully exposed to U.S. taxes. Certain portfolio debt, U.S. bank deposits, and most importantly, shares of foreign corporations generally are not. This single rule is the crux behind most NRA structuring.
The gift-tax strategy
An NRA pays U.S. gift tax on lifetime gifts of U.S.-situs tangible property such as real estate, art, and other tangible property, but not on gifts of intangibles such as U.S. stock. An inter-vivos gift (i.e., a lifetime transfer) that would be taxable in the estate at death can escape gift tax altogether, which is a planning lever that is not available at death.
Spousal transfers
The unlimited marital deduction applies only where the surviving spouse is a U.S. citizen. A non-citizen surviving spouse can only defer the payment of federal estate tax by using a Qualified Domestic Trust (QDOT); this is a frequently overlooked tax implication in international marriages.
Two regimes: At a glance
Federal numbers are only half the picture. Even families comfortably below the $15 Million federal exemption can be caught by the 18 states and the District of Columbia that levy their own estate or inheritance tax, frequently at far lower thresholds. And in the nine community property states, the character of marital property reshapes both the basis step-up at death and what each spouse is treated as owning, a factor that may quietly follow globally mobile couples who once lived in these states long after they leave.
The lesson is that status drives the entire wealth plan. A UAE resident investor who is effectively invisible to the U.S. income tax system on offshore earnings can still walk into a 40% estate-tax liability on a single U.S. brokerage account.
The U.S. citizen abroad who assumes a zero-tax country shields them may still file and pay tax on the worldwide income and gifts. Structure is the bridge between these two worlds, but it can only be built once status, domicile, and situs are correctly mapped. This mapping is the first conversation, not the last. We at Water & Shark work at exactly this intersection. Across the United Arab Emirates (UAE), Singapore, Europe, and the U.S. corridor. If your wealth touches the U.S., the place to begin is a clear read of where you stand.
FAQ’s - Frequently Asked Question
3. Are U.S. stocks subject to U.S. gift tax for NRAs?
No. U.S. corporate shares are considered intangible property, so NRAs can generally gift them during lifetime without triggering U.S. gift tax.
