Form 706-NA: U.S. Estate Tax Filing for Nonresident Aliens

Form 706-NA is the federal estate tax return the executor of a nonresident non-citizen decedent must file when the value of the decedent’s U.S.-situs assets, combined with certain post-1976 gifts, exceeds $60,000 at the date of death.¹ The return is due nine months after death, and the estate receives only a $13,000 unified credit against a tax that runs as high as 40%.² A single piece of American real estate or a modest U.S. brokerage account can put an estate over the threshold, which is why accuracy on this return matters so much.

When Form 706-NA Is Required

The filing threshold is low. If the gross value of the decedent’s U.S.-situs assets plus adjusted taxable gifts made after December 31, 1976, plus any gift tax specific exemption used after September 8, 1976, exceeds $60,000, the estate must file.¹

Filing is also required, even below that threshold, when the estate claims a credit for tax on prior transfers, when it claims benefits under an estate tax treaty, or when the decedent used any portion of the $13,000 unified credit during their lifetime.¹

The IRS defines “executor” broadly. If no personal representative has been appointed and qualified within the United States, every person who has actual or constructive possession of any of the decedent’s U.S. property is treated as the executor and carries the filing obligation.¹ That often means a family member abroad, a foreign executor, or the U.S. financial institution holding the assets. When several people qualify, the IRS prefers a single joint return.

Nonresident Status Turns on Domicile

Form 706-NA applies only when the decedent was a nonresident not a citizen at death, and the IRS decides residency for estate tax purposes through domicile rather than the substantial presence test used for income tax. Domicile requires both physical presence somewhere and a clear intent to make that place a permanent home, with no present intention of moving elsewhere.¹

Someone who spent years in the U.S. on a work visa but kept a permanent home abroad and planned to return is generally a nonresident for estate tax purposes. Someone who moved to the U.S. intending to stay permanently can be domiciled here even without citizenship. The consequences of the classification are large: a U.S. domiciliary files Form 706, gets a basic exclusion of $15,000,000 in 2026, and is taxed on worldwide assets.³ A nonresident non-citizen files Form 706-NA, gets a $13,000 credit (roughly a $60,000 exemption), and is taxed only on U.S.-situs property.

What Counts as a U.S. Situs Asset

Only U.S.-situs property is taxed. Classifying each asset the decedent held is the executor’s first substantive task, because the rules are not intuitive and several valuable exclusions apply.

Real Estate and Tangible Property

U.S. real property is always U.S. situs: land, condominiums, cooperative apartments. Tangible personal property physically in the United States at death is also included, so artwork at a U.S. residence, jewelry in a U.S. safe deposit box, and cars titled in the U.S. all count. Artwork imported solely for public exhibition in a museum or gallery is treated as situated outside the United States.⁴

Stock in U.S. Corporations

Shares issued by a domestic corporation are U.S. situs regardless of where the certificates sit or which country the brokerage account is in.⁵ Shares of a foreign corporation are non-U.S. situs even when the company operates primarily in the United States.⁴

Debt Obligations

Debt of a U.S. person, the U.S. government, or a state or local government is generally U.S. situs.⁵ But there is a major exception. If the interest on a debt instrument would have qualified for the portfolio interest exemption had the decedent received it at death, the obligation is excluded from the U.S. gross estate.⁶ Most publicly traded U.S. corporate bonds and Treasury securities held by a nonresident in a standard investment account fall inside that exclusion. The exception does not apply if the decedent held 10% or more of the voting power of a corporate issuer, or if the interest was contingent on the debtor’s profits.

Bank Deposits and Life Insurance

Deposits with U.S. banks, savings institutions, and certain insurance companies are treated as situated outside the United States and are not subject to estate tax, provided the interest was not effectively connected with a U.S. trade or business the decedent carried on.⁷ Cash held at a U.S. brokerage firm or other non-bank institution does not qualify for this exclusion and is U.S. situs.

Life insurance proceeds on the life of a nonresident non-citizen are non-U.S. situs regardless of whether the insurer is American and regardless of whether the proceeds go to the estate or to named beneficiaries.⁶

Treaty Overrides

An applicable estate tax treaty can modify these rules, narrowing the list of U.S.-situs assets or providing a larger unified credit based on the ratio of U.S. assets to worldwide assets. If the estate claims a treaty benefit, the executor must attach a statement citing the specific treaty article and paragraph and showing the resulting computation.¹ The U.S. has estate tax treaties with only a limited set of countries, so checking whether one exists between the decedent’s home country and the United States is an early step.

Valuation and Allowable Deductions

Every U.S.-situs asset is reported at fair market value on the date of death. The executor may instead elect the alternate valuation date six months later, but only if the election reduces both the gross estate and the total tax liability.¹ Real estate needs a formal appraisal. Publicly traded securities are valued at the mean between the high and low selling prices on the valuation date. Brokerage statements, bank records, and other financial documentation should back every reported value.

Deductions are narrower than they are for a citizen or resident estate. The estate may deduct funeral expenses, administration expenses, claims against the estate, unpaid mortgages secured by U.S.-situs property, and casualty or theft losses arising during settlement and not covered by insurance. These are not deducted dollar for dollar. They are limited to the proportion the U.S. gross estate bears to the worldwide gross estate.¹ If the U.S. estate is 30% of the worldwide estate, only 30% of these expenses are deductible.

The charitable deduction is available only when the transferred property is U.S. situs and the recipient is a qualified U.S. charity.¹ The marital deduction is available only if the surviving spouse is a U.S. citizen; when the spouse is not, the property must pass into a Qualified Domestic Trust. A QDOT must have at least one trustee who is a U.S. citizen or domestic corporation, and that trustee must have the right to withhold estate tax from any principal distribution.⁸ When these deductions are claimed, the corresponding Form 706 schedules (such as Schedule M for the marital deduction) attach to the 706-NA.

Because the proportionate deduction rule and any treaty credit both turn on the ratio of U.S. to worldwide assets, the executor has to determine and document the entire worldwide gross estate on a statement attached to the return. Undervaluing worldwide assets inflates that ratio and overstates deductions, and the IRS looks at this closely.

Computing the Tax and Applying the Credit

The estate tax uses the same progressive rate schedule that applies to citizens and residents, from 18% on the first $10,000 of taxable value up to 40% on amounts above $1,000,000.⁹ The tax is imposed under IRC 2101 using the rate table from IRC 2001(c). The tentative tax is calculated on the taxable estate plus adjusted taxable gifts, minus the tentative tax on the adjusted taxable gifts alone.¹⁰

The statutory unified credit for a nonresident non-citizen estate is $13,000, which offsets tax on $60,000 of taxable value.² When a treaty applies, that credit can increase to a proportionate share of the full applicable credit, calculated as the ratio of U.S.-situs assets to the worldwide estate. For a decedent whose U.S. assets are a small slice of a larger foreign estate, the treaty-enhanced credit can reduce or eliminate the tax.

The credit is subtracted from the tentative tax to produce the net estate tax due. Any credit for tax on prior transfers and other additional credits are applied next. What remains is what the estate owes.

Deadline, Extension, and Where to File

Form 706-NA is due nine months after the date of death. If the due date falls on a weekend or legal holiday, it moves to the next business day.¹

The executor can get an automatic six-month extension to file by submitting Form 4768 before the original due date. Form 4768 goes to a different address than the return: Internal Revenue Service Center, Attn: Estate & Gift, Stop 824G, 7940 Kentucky Drive, Florence, KY 41042-2915. The filing extension does not extend the time to pay. The full liability is due at the original nine-month deadline, and interest runs on any unpaid balance from that date.¹¹

A separate payment extension is available under IRC 6161, but it is not automatic. The executor must show reasonable cause for not paying on time, and the IRS may require a bond. A separate Form 4768 is used for a payment extension, and the IRS generally will not consider one submitted after the original due date.¹¹

The completed return and attachments go by mail to: Department of the Treasury, Internal Revenue Service Center, Kansas City, MO 64999.¹ If you use a private delivery service such as FedEx or UPS, the street address is Internal Revenue Submission Processing Center, 333 W. Pershing, Kansas City, MO 64108. Payment can be made electronically through the IRS website or by check or money order payable to the U.S. Treasury.

Documents to Attach

Form 706-NA is a compact two-page form, but the attachments do most of the work. Missing documentation is a common reason returns get flagged.

A copy of the death certificate, with an English translation if the original is in a foreign language.
A certified copy of the will and any codicils, with English translations where needed.
Part V of Form 706-NA lists all U.S.-situs assets and their values; the relevant Form 706 schedules attach to document those assets and any claimed deductions.
Formal appraisals for real estate, and brokerage statements or financial records supporting the reported value of securities and other financial assets.
A statement showing the value of the decedent’s entire worldwide gross estate, needed for the proportionate deductions and any treaty credit.
A separate statement citing the treaty article and paragraph and showing the resulting computation, if the estate claims a treaty benefit.

All foreign-language documents should come with English translations.¹² The IRS does not specify a particular certification standard for these translations, but a professional translator and a signed statement of accuracy is a sensible precaution.

Late Filing and Late Payment Consequences

The penalties stack. A late return draws a failure-to-file penalty of 5% of the unpaid tax for each month or partial month, capped at 25%.¹³ A separate failure-to-pay penalty of 0.5% per month applies to any tax unpaid by the original due date, also capped at 25%.¹⁴ When both run at once, the failure-to-file penalty is reduced by the failure-to-pay amount, so the combined rate during the first five months is effectively 5% per month. After the failure-to-file penalty maxes out at 25%, the failure-to-pay penalty keeps accumulating on its own.

Interest also runs on any unpaid tax from the original due date, compounded daily at the IRS underpayment rate, which is reset quarterly.¹⁵ Interest compounds on the penalties too. Filing on time even when the estate cannot yet pay is the better move, because it avoids the 5%-per-month failure-to-file penalty.

After Filing: Form 8971, Transfer Certificates, and the Closing Letter

The executor also has to file Form 8971, which reports the estate tax value of each asset to the IRS and to the beneficiaries who receive that property. Each beneficiary gets a Schedule A listing the assets distributed to them and the reported values. Those values become each beneficiary’s initial tax basis in the inherited property, and they cannot claim a higher basis than the estate reported.¹⁶

U.S. financial institutions holding the decedent’s assets will often refuse to release them until the IRS issues a transfer certificate (Form 5173) confirming the estate tax has been paid or resolved. This is not required when the estate is administered by an executor appointed and acting within the United States, but for most nonresident estates handled from abroad it is a practical necessity. If Form 706-NA was not required, do not file one just to request a transfer certificate; the IRS warns that an unnecessary 706-NA will delay the process.¹²

Once the IRS has processed the return, the estate can request an Estate Tax Closing Letter through Pay.gov, along with a user fee of $56.¹⁷ Wait at least nine months after filing Form 706-NA before submitting the request, unless the account transcript already shows transaction code TC 421, in which case the request can go in sooner.¹⁸

1
Internal Revenue Service. Instructions for Form 706-NA
2
Office of the Law Revision Counsel. 26 USC 2102 – Credits Against Tax
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Internal Revenue Service. What’s New – Estate and Gift Tax
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eCFR. 26 CFR 20.2105-1 – Estates of Nonresidents Not Citizens
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Office of the Law Revision Counsel. 26 U.S. Code 2104 – Property Within the United States
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Office of the Law Revision Counsel. 26 U.S. Code 2105 – Property Without the United States
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Internal Revenue Service. Some Nonresidents with U.S. Assets Must File Estate Tax Returns
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Office of the Law Revision Counsel. 26 U.S. Code 2056A – Qualified Domestic Trust
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Office of the Law Revision Counsel. 26 U.S. Code 2001 – Imposition and Rate of Tax
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Office of the Law Revision Counsel. 26 USC 2101 – Tax Imposed
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Internal Revenue Service. Instructions for Form 4768
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Internal Revenue Service. Transfer Certificate Filing Requirements for the Estates of Nonresidents Not Citizens of the United States
13
Office of the Law Revision Counsel. 26 U.S. Code 6651 – Failure to File Tax Return or to Pay Tax
14
Internal Revenue Service. Failure to Pay Penalty
15
Internal Revenue Service. Quarterly Interest Rates
16
Internal Revenue Service. Instructions for Form 8971 and Schedule A
17
Internal Revenue Service. Estate Tax Closing Letter Fee Reduced to $56 Effective May 21, 2025
18
Internal Revenue Service. Frequently Asked Questions on the Estate Tax Closing Letter