The Qualified Domestic Trust (QDOT): Estate Planning for Non-Citizen Spouses

The marital deduction gap for non-citizen spouses

Under U.S. estate tax law, a surviving spouse who is a U.S. citizen can inherit an unlimited amount from their deceased spouse free of federal estate tax — the unlimited marital deduction. This is one of the most powerful tools in domestic estate planning. But the unlimited marital deduction is not available for transfers to a surviving spouse who is not a U.S. citizen, regardless of how long the couple has been married or how long the non-citizen spouse has lived in the United States.

The policy rationale is straightforward: the marital deduction is a deferral, not an exemption. The idea is that estate tax will eventually be collected when the surviving spouse dies. If the surviving spouse is a non-citizen, there is a risk they will leave the United States with the inherited assets, removing them permanently from the U.S. tax base. The Qualified Domestic Trust (QDOT) was created to address this concern while still allowing tax deferral for international couples.

How a QDOT works

A QDOT is an irrevocable trust that qualifies for the marital deduction by satisfying specific requirements designed to ensure the deferred estate tax will ultimately be collected. The key requirements are: at least one trustee must be a U.S. citizen or U.S. corporation (to ensure the IRS can enforce the estate tax lien), the executor must make a QDOT election on the estate tax return, and the trust must comply with Treasury Regulations regarding the security of the deferred tax.

Assets passing to a QDOT at the first spouse's death qualify for the marital deduction, deferring estate tax just as a direct bequest to a U.S. citizen spouse would. However, unlike a bequest to a U.S. citizen spouse, distributions from a QDOT — other than distributions of income to the surviving spouse — trigger estate tax at the time of distribution. The estate tax is computed as if the distributed amount had been included in the first spouse's taxable estate at the first spouse's marginal rate. And when the non-citizen surviving spouse dies, the remaining QDOT assets are subject to estate tax at that time.

Income distributions vs. principal distributions

The QDOT rules distinguish between income distributions and principal distributions. Distributions of income to the non-citizen surviving spouse are not subject to the deferred estate tax — they are simply includible in the surviving spouse's income for income tax purposes. Distributions of principal, however, trigger the deferred estate tax immediately. The only exception is for hardship distributions — distributions of principal necessary to meet the immediate and substantial financial need of the surviving spouse for their health, maintenance, education, or support.

The QDOT as an alternative to naturalization

Naturalization — becoming a U.S. citizen — eliminates the need for a QDOT entirely, because a naturalized citizen qualifies for the unlimited marital deduction like any other U.S. citizen. If a non-citizen spouse naturalizes before the deceased spouse's estate tax return is filed (generally nine months after death, with a possible extension), the unlimited marital deduction applies retroactively. For couples where naturalization is feasible and desirable, it is often the cleanest solution.

Annual exclusion gifts to non-citizen spouses

In addition to the QDOT for estate tax planning, couples with a non-citizen spouse should be aware that the annual gift tax exclusion is significantly enhanced for transfers to a non-citizen spouse. In 2024, a U.S. citizen or resident may make annual gifts of up to $185,000 (adjusted for inflation) to a non-citizen spouse free of gift tax — compared to the standard $18,000 annual exclusion for gifts to other individuals. This provides a meaningful lifetime wealth transfer opportunity that does not depend on a QDOT.

Estate planning for international couples requires careful coordination of the QDOT rules, the enhanced annual exclusion, the applicable estate tax treaties, and the non-citizen spouse's own country's succession laws. Our attorneys work with cross-border couples to design plans that work across all relevant legal systems. Contact us to get started.