Non-Citizen Spouse and the Estate Tax: The QDOT Rule (California)

Short answer: The unlimited marital deduction — the rule that lets you leave everything to your spouse estate-tax-free — does not apply when your surviving spouse is not a U.S. citizen (IRC § 2056(d)). Assets above the exemption passing to a non-citizen spouse could be taxed at the first death. The fix is a QDOT (qualified domestic trust, IRC § 2056A), which defers the tax until the survivor draws principal or dies. But with the federal exemption at $15 million per person, most couples never hit this at all.

Figures verified against the Internal Revenue Code and IRS 2026 inflation figures; the $15M exemption is from the One Big Beautiful Bill Act, P.L. 119-21. This is general information, not legal advice for your situation.

Why the marital deduction disappears here

Normally, spouses can leave each other unlimited assets with zero estate tax, thanks to the unlimited marital deduction (IRC § 2056(a)). It’s the backbone of most married couples’ planning — the first spouse to die passes everything to the survivor, tax deferred, and the estate tax only comes up (if at all) at the second death.

Congress carved out one exception. Under IRC § 2056(d), the unlimited marital deduction does not apply if the surviving spouse is not a U.S. citizen. The worry is straightforward: a non-citizen spouse could inherit a large estate tax-free and then move abroad, out of reach of the IRS, so the U.S. would never collect the tax it deferred. So the law says: no automatic deferral for a non-citizen spouse. Assets above the exemption passing to them can be hit with estate tax at the first death — the exact thing the marital deduction usually prevents. Note this is about citizenship, not residency or immigration status; a green-card holder is still a non-citizen for this rule.

The fix: a QDOT

The workaround is a qualified domestic trust, or QDOT (IRC § 2056A). Instead of leaving assets outright to your non-citizen spouse, you leave them to a QDOT for the spouse’s benefit. That restores the deferral: the estate tax is postponed, not erased, until the survivor either takes principal out of the trust or dies. The key requirements are that at least one trustee must be a U.S. citizen or domestic corporation, and for larger QDOTs the trust must meet security rules so the IRS can eventually collect. The surviving spouse can receive all the income and even principal in a hardship, but principal distributions generally trigger the deferred tax — which is the government’s way of making sure it isn’t skipped.

A QDOT can be built into your trust from the start, or a surviving spouse can sometimes set one up after the first death within a filing deadline. Either way, this is precise tax drafting — not a DIY project — and it’s coordinated with the estate tax return (Form 706).

Who actually needs this (and who doesn’t)

Here’s the honest part, because most people reading this don’t need a QDOT. The federal estate tax exemption is $15 million per person in 2026, and it’s permanent — the old “sunset back to $7M” was repealed. California has no state estate tax and no state inheritance tax on top of that. So a couple has to be sitting above roughly $15 million before the estate tax even enters the picture.

Run the Ventura County math. A couple owns a $1.2 million Camarillo home, $900,000 in retirement accounts, and $400,000 in savings — call it $2.5 million. One spouse is a green-card holder, not a citizen. Do they need a QDOT? No. They’re nowhere near $15 million, so nothing would be taxed at the first death, and the QDOT solves a problem they don’t have. Building one in would add cost and complexity for zero benefit.

Who should plan for it:

• Couples whose combined estate is at or above the exemption — larger business owners, significant real estate holdings, big investment portfolios.
• A wealthy spouse leaving substantial assets to a non-citizen (including green-card-holder) spouse.
• Couples whose net worth is growing toward that range and who want the QDOT language ready in the trust just in case.

If that’s you, this belongs in a real conversation about estate tax planning and, for larger estates, the broader strategies for high-net-worth families. If it’s not you, one paragraph in a normal plan covers everything you need, and the specifics of estate planning for non-citizens in California matter more for your everyday planning than the estate tax does.

One more non-citizen rule: lifetime gifts

There’s a related trap during life, not at death. Normally you can give your spouse unlimited gifts tax-free. But gifts to a non-citizen spouse are capped — in 2026 the annual exclusion for gifts to a non-citizen spouse is $194,000, not unlimited. Go above that in a year and you’re into gift-tax reporting. It rarely bites ordinary couples, but if you’re retitling assets or making large transfers to a non-citizen spouse, it’s worth knowing the ceiling exists.

Common questions

Can I leave everything to my non-citizen spouse tax-free?

Not automatically. The unlimited marital deduction under IRC § 2056(a) doesn’t apply to a non-citizen surviving spouse (IRC § 2056(d)), so assets above the exemption could be taxed at the first death. To defer the tax, the assets generally have to pass through a QDOT. Below the $15 million exemption, though, there’s usually no tax to worry about anyway.

What is a QDOT and how does it work?

A QDOT (qualified domestic trust, IRC § 2056A) holds assets for a non-citizen surviving spouse and restores the estate-tax deferral the marital deduction would normally give. It requires a U.S. citizen or domestic corporate trustee and security for larger trusts. The tax is postponed until the spouse takes principal out or dies — it’s deferred, not eliminated.

Does my green-card-holder spouse count as a non-citizen for this?

Yes. The rule turns on citizenship, not immigration or residency status, so a lawful permanent resident (green-card holder) is treated as a non-citizen for the marital deduction. One common option is for the surviving spouse to become a U.S. citizen before the estate tax return is due, which can restore the normal marital deduction.

Do most couples with a non-citizen spouse need a QDOT?

No. With a $15 million per-person federal exemption and no California estate tax, a couple generally has to be worth around $15 million or more before the estate tax matters at all. Most families are far below that, so a QDOT would solve a problem they don’t have. It’s a tool for larger estates.

How much can I gift my non-citizen spouse each year?

In 2026, up to $194,000 to a non-citizen spouse before gift-tax reporting kicks in — the unlimited spousal gift rule doesn’t apply here. That’s usually plenty for ordinary transfers, but large retitling or funding moves can exceed it, so keep the ceiling in mind if you’re shifting significant assets.

The bottom line

If your spouse isn’t a U.S. citizen, the unlimited marital deduction doesn’t apply, and a large estate could face estate tax at the first death instead of the second — the fix being a QDOT that defers the tax with a U.S. trustee. But this is a problem for a small slice of families. With the exemption at $15 million per person and no California estate tax, most couples, including those with a green-card-holder spouse, will never owe a dollar of estate tax and don’t need a QDOT at all. If your combined estate is near or above that line, this is worth planning for carefully and early. If it isn’t, you can set the QDOT worry aside. Not sure which camp you’re in? Talk to Eric — he’ll tell you straight whether this even applies to you, and if it’s really a job for a tax specialist, he’ll say so and point you to one.

Sources: IRC § 2056(a) (unlimited marital deduction); IRC § 2056(d) (no marital deduction for non-citizen surviving spouse); IRC § 2056A (qualified domestic trust / QDOT); IRC § 2010(c) and One Big Beautiful Bill Act, P.L. 119-21 § 70106 ($15 million exemption, permanent); IRC § 2523(i) (annual exclusion for gifts to a non-citizen spouse, $194,000 in 2026).