U.S. Estate Tax and the US$60,000 Threshold: What Happens to an Overseas Brokerage Account When a Non-U.S. Investor Dies

When a Taiwanese investor who holds U.S. stocks and U.S. ETFs through Firstrade, IBKR or Schwab dies, those assets may first be subject to U.S. estate tax, and the heirs face a long paperwork process before they can receive them. The U.S. estate tax rules are not complicated, but the threshold is low: if U.S.-situated property exceeds US$60,000, a return must be filed.

The short answer: under IRS rules, when a nonresident who is not a U.S. citizen dies with U.S.-situated property (including U.S. stocks and U.S.-domiciled ETFs) worth more than US$60,000, Form 706-NA must be filed within 9 months, at rates from 18% to 40%. Brokers usually wait for an IRS transfer certificate before transferring assets to heirs, and the IRS says that takes 12 to 18 months. Most non-U.S. accounts at overseas brokers cannot name a beneficiary on death in advance, so whether your family knows where the account is and how to prepare the documents becomes a problem before the tax rate does.

This post is based on IRS, U.S. Treasury and broker sources checked on 15 October 2026. It explains rules and procedures only and is not tax or legal advice. For an actual filing, consult an accountant or lawyer familiar with U.S. estate tax.

The U.S. estate tax rules: the US$60,000 threshold and the US$13,000 credit

The IRS guidance on estate tax for nonresidents who are not U.S. citizens (updated 28 June 2026) says that if property situated in the U.S. at death is worth more than US$60,000 (including any taxable gifts made in the U.S. during life), the executor must file Form 706-NA. This threshold is not adjusted for inflation.

The Form 706-NA instructions put the unified credit at generally no more than US$13,000, which is exactly the tax on US$60,000 under the rate schedule, so in effect the first US$60,000 is not taxed. For U.S. citizens and residents, the exemption in 2026 is US$15 million (IRS), a very large gap. None of the IRS pages I checked show the 2025 law changing the US$60,000 rule for nonresidents.

Rate schedule

Rates follow Table A in the Form 706 instructions (July 2026 revision):

Worked examples: how much tax on how much in U.S. stocks

These are my rough figures calculated directly from Table A, with no deductions such as debts or funeral expenses. A nonresident’s deductions are prorated by the share of U.S.-situated property in the worldwide estate, and the return must include information on the foreign estate, so the actual tax depends on the filed return.

There is no estate tax treaty between Taiwan and the U.S. The Form 706-NA instructions list the treaty countries (for example Japan, the U.K., Germany, Canada and Australia), and Taiwan is not among them, so the US$60,000 threshold and US$13,000 credit above are what apply.

Which assets count as U.S.-situated property

Based on the Form 706-NA instructions and the IRS FAQ:

The differences between Irish-domiciled ETFs and U.S. ETFs in dividend withholding and estate tax are compared in “VT vs VOO: Tax and Estate Tax for Non-U.S. Investors.”

U.S. filing after death: Form 706-NA

Per the Form 706-NA instructions:

• Who files: the executor. If no executor has been formally appointed in the U.S., anyone in actual or constructive possession of the decedent’s property is treated as the executor and is responsible for filing.
• Deadline: within 9 months of death. Form 4768 gives an automatic 6-month extension to file, but the deadline to pay is not extended, and late payment adds interest.
• Documents to attach: a copy of the death certificate; if there is a will, a certified copy of it; a certified copy of the foreign estate tax return (if none was filed, an inventory of the foreign estate); and documents proving the executor’s authority, such as the will or a court order appointing the executor. A statement written by the executor is not enough.
• The decedent’s tax number: enter the SSN if there is one, and the ITIN only if one was used to file other U.S. tax returns. If there is neither, leave it blank and the IRS will assign a number.
• Heirs are liable too: the IRS can collect unpaid estate tax from anyone who received part of the estate.

The IRS transfer certificate: what brokers often want before releasing assets

Brokers usually need confirmation that the U.S. estate tax has been dealt with before they transfer assets to heirs. That confirmation is the IRS transfer certificate (brokers and practitioner articles often call it Form 5173).

According to the IRS guidance on transfer certificates (updated 5 May 2026):

• If Form 706-NA is required: fax the filed Form 706-NA and its schedules to the IRS.
• If Form 706-NA is not required: fax the will, any estate tax returns filed in other countries, the death certificate (with an English translation if it is not in English), and an affidavit signed by the executor and notarized, stating the decedent’s date and country of birth, citizenship and residence, a list of U.S. assets and their values on the date of death (including account numbers), and so on.
• Processing time: 12 to 18 months after the IRS receives complete documents.
• Property administered by an executor formally appointed in the U.S. and acting in the U.S. does not need a transfer certificate.

Is there no wait under US$60,000?

Under U.S. Treasury Regulation 20.6325-1, no transfer certificate is required when a nonresident’s U.S. estate is not more than US$60,000. A custodian such as a broker that receives a factual statement from the executor showing the estate is within the threshold, and has no information to the contrary, is not liable for transferring without a certificate.

But this rule protects the broker. It does not require the broker to release the assets, and the broker can still ask for a transfer certificate on its own.

Inheritance procedures at three overseas brokers

I could not find official pages at any of the three brokers that specifically describe the procedure when a non-U.S. client dies. Below is what can be confirmed from official documents.

Based on common practice, the documents each broker asks for usually include the death certificate, court documents establishing the heir’s or executor’s authority, translations and notarization, and the IRS transfer certificate. How Taiwanese documents should be authenticated, and whether a U.S. broker will accept them, is something to ask the broker directly.

What your family should know in advance

• Where the account is and how to log in: no Taiwanese financial institution will notify your family about an overseas brokerage account. If your family does not know about the account, the assets may simply sit there.
• How to contact the broker: Firstrade’s customer service email is service@firstrade.com.
• Timing: 9 months for the U.S. filing, 12 to 18 months for the transfer certificate, plus Taiwan’s estate tax filing, so it may take more than a year for the assets to reach the heirs.

The Taiwan side: estate tax still has to be filed, and U.S. tax paid can be credited

Under Article 1 of Taiwan’s Estate and Gift Tax Act, when a national who habitually resides in Taiwan dies, the entire estate inside and outside Taiwan is subject to estate tax, including U.S. stocks at an overseas broker.

• Filing deadline: within 6 months starting the day after death (Article 23).
• 2026 exemption and rates: Taiwan’s Ministry of Finance announced no adjustment for inheritance cases arising in 2026 (ROC year 115). The exemption is NT$13.33 million; the rate is 10% on a net estate up to NT$56.21 million, 15% from NT$56.21 million to NT$112.42 million, and 20% above NT$112.42 million (National Taxation Bureau of the Northern Area, Ministry of Finance eTax Portal).
• Foreign tax credit: Article 11 provides that estate tax already paid in the U.S. can be credited against the tax payable in Taiwan only if you present a tax payment certificate issued by the U.S. tax authority and have it authenticated; the credit cannot exceed the increase in Taiwanese tax caused by including that foreign property.

So an estate with U.S. stocks may have to be dealt with on both sides: the U.S. taxes it first, then Taiwan does. Taiwan lets you deduct what was already paid in the U.S., but the credit is capped.

Ways to reduce the impact: what the rules allow

This section only explains the rules. Which option fits depends on the size of your assets and your family situation:

• Keep U.S.-situated property in check: the threshold is US$60,000, and only the amount above it is taxed.
• Foreign-domiciled ETFs: Irish-domiciled UCITS ETFs, for example, are not shares of U.S. corporations and are not U.S.-situated property.
• Sub-brokerage: as covered in “Sub-brokerage vs an overseas broker,” U.S. stocks registered in a nominee’s name still count as U.S.-situated property. I found no official guidance on how a sub-brokerage (複委託, a Taiwanese broker placing U.S. orders for you) account is handled after death, so do not assume that “sub-brokerage means no U.S. estate tax.”
• Let your family know where the accounts and documents are: this does not save tax, but it lets the process get started.

For choosing an overseas broker and comparing fees, see “Sub-brokerage vs an overseas broker”; for dividend withholding and W-8BEN, see “VT vs VOO: Tax and Estate Tax for Non-U.S. Investors.”

FAQ

Is the US$60,000 for U.S. estate tax an exemption?

In IRS documents, US$60,000 is the filing threshold for Form 706-NA, and it is not adjusted for inflation. The unified credit available to nonresidents who are not U.S. citizens is generally at most US$13,000, which is exactly the tax on US$60,000, so it is often described as a "US$60,000 exemption." Anything above that is taxed under the 18% to 40% rate schedule.

Which assets count as U.S.-situated property?

According to the IRS, shares of corporations organized under U.S. law are U.S.-situated property, even if the certificates are held abroad or registered in a nominee's name, and U.S.-domiciled ETFs are generally treated under the same rule. Bank deposits not connected with a U.S. trade or business, bonds that qualify for portfolio interest, and life insurance proceeds are treated as property outside the U.S. The IRS does not say explicitly how cash balances in a brokerage account are treated.

How soon after death must the U.S. estate tax return be filed?

Form 706-NA is due within 9 months of death. Form 4768 gives an automatic 6-month extension to file, but it does not extend the deadline to pay. In Taiwan, the estate tax return is due within 6 months starting the day after death.

What is an IRS transfer certificate, and do heirs have to wait for one?

A transfer certificate (often called Form 5173) is a document the IRS issues once it confirms the estate tax has been dealt with, and brokers often require it before transferring assets to heirs. The IRS says it takes 12 to 18 months after it receives complete documents. Under U.S. Treasury regulations, no transfer certificate is required when the U.S. estate is not more than US$60,000, but a broker can still ask for one on its own.

Can I name a beneficiary on death for an overseas brokerage account?

IBKR's official guidance states that Transfer on Death is offered only for U.S. accounts; Schwab's Designated Beneficiary Plan also states that it does not apply to accounts whose primary residence is outside the U.S. Firstrade's TOD form says it is not available in all regions, without stating whether nonresidents can use it.

If U.S. estate tax has been paid, is tax still due in Taiwan?

Yes. For a national who habitually resides in Taiwan, the entire estate inside and outside Taiwan is subject to Taiwanese estate tax. Under Article 11 of Taiwan's Estate and Gift Tax Act, estate tax already paid in the U.S. can be credited with a tax payment certificate from the U.S. tax authority, once it is authenticated, but the credit cannot exceed the increase in Taiwanese tax caused by including that foreign property.