美国赠与税与遗产税科普：新移民的资产转移规划

New immigrants to the United States often overlook two of the most expensive tax traps: the federal gift tax and the estate tax. Unlike most countries that levy inheritance taxes on the heir, the U.S. system taxes the estate of the deceased or the giver of a substantial gift—and the rates are steep. As of 2024, the federal estate tax exemption stands at $13.61 million per individual (indexed for inflation), meaning only estates valued above that threshold owe tax. However, the top marginal rate is 40% (IRS, 2024, Estate and Gift Tax FAQs). For non-resident aliens (NRAs) who own U.S. “situs” assets—such as real estate or stock in a U.S. corporation—the exemption drops to just $60,000 (IRS, 2024, Publication 559). This creates a massive planning gap: a Chinese national with a $2 million California home could owe over $700,000 in estate tax upon death. Furthermore, the annual gift tax exclusion in 2024 is $18,000 per donee (IRS, 2024, Revenue Procedure 2023-34), but any gift exceeding that amount counts against the lifetime exemption. Understanding the distinction between U.S. domicile and residency, the portability of exemptions between spouses, and the treatment of foreign trusts is critical for anyone moving assets across borders.

Understanding the Lifetime Gift Tax Exemption

The cornerstone of U.S. gift and estate planning is the unified lifetime exemption. This is the total amount you can give away during your life (or leave at death) without triggering federal transfer tax. For 2024, the exemption is $13.61 million per U.S. citizen or resident.

How It Works in Practice

If you gift $1 million to your child in 2024, you must file IRS Form 709. You do not pay tax immediately, but you consume $1 million of your $13.61 million lifetime exemption, leaving you with $12.61 million for future gifts or your estate. The tax only applies once you exceed the exemption. The top rate on any excess is 40% (IRS, 2024, Form 709 Instructions).

State-Level Differences

Thirteen states and the District of Columbia also impose their own estate or inheritance taxes, with exemptions far lower than the federal level. For example, Massachusetts exempts only $1 million (Massachusetts Department of Revenue, 2024, Estate Tax Guide). New immigrants moving to a high-tax state like Oregon or Maryland must plan for both state and federal exposure.

The Annual Gift Tax Exclusion: Your Best Planning Tool

The most effective way to reduce your taxable estate without filing a return is the annual gift tax exclusion. For 2024, you can give up to $18,000 to any number of individuals without using any of your lifetime exemption.

Gifts to Non-Citizen Spouses

A special rule applies to spouses who are not U.S. citizens. The unlimited marital deduction does not apply. Instead, the annual exclusion for gifts to a non-citizen spouse is $185,000 in 2024 (IRS, 2024, Publication 559). This allows a green card holder to transfer significant assets to a foreign spouse tax-free each year.

Gift Splitting

Married couples can elect to “split” gifts, effectively doubling the annual exclusion to $36,000 per donee. This is particularly useful for funding a child’s down payment or paying tuition directly to an educational institution (which is exempt from gift tax entirely).

Estate Tax for Residents vs. Non-Resident Aliens

The IRS draws a sharp line between U.S. residents (including green card holders) and non-resident aliens (NRAs). For U.S. residents, the $13.61 million exemption applies to their worldwide assets. For NRAs, only U.S.-situs assets are subject to estate tax, but the exemption is a mere $60,000 (IRS, 2024, Publication 559).

What Counts as U.S. Situs Assets

• Real property located in the U.S.
• Tangible personal property physically in the U.S. (e.g., jewelry, art)
• Stock issued by a U.S. corporation (even if held abroad)
• Debt obligations of a U.S. person or entity

The Trap for New Immigrants

A Chinese national who owns a $3 million Florida condo and has a $5 million U.S. stock portfolio will have an estate of $8 million. As an NRA, only the first $60,000 is exempt. The taxable portion is $7.94 million, taxed at 40%, yielding a tax bill of approximately $3.18 million. Proper planning—such as holding the property through a foreign corporation or using a qualified domestic trust (QDOT)—can avoid this.

Portability: Preserving Your Spouse’s Exemption

Since 2011, the IRS has allowed portability between spouses. When one spouse dies, the surviving spouse can elect to use the deceased spouse’s unused exemption (DSUE). This effectively doubles the surviving spouse’s exemption.

How to Elect Portability

The executor must file IRS Form 706 (Estate Tax Return) within nine months of death, even if no tax is owed. A late election is possible within two years if the estate was not required to file. For new immigrants with a high net worth, failing to file Form 706 can waste millions in exemption. For cross-border tuition payments, some international families use channels like Airwallex global account to settle fees efficiently, but estate planning requires a separate legal filing.

Irrevocable Life Insurance Trusts (ILITs)

An ILIT is a common strategy for high-net-worth immigrants to remove life insurance proceeds from their taxable estate. The trust owns the policy, pays premiums with annual gifts, and the death benefit goes to beneficiaries free of estate tax.

Why It Matters for New Immigrants

If you buy a $5 million life insurance policy in your own name, the payout is included in your estate. At a 40% rate, that’s $2 million lost to taxes. An ILIT removes the policy from your estate entirely. The trust must be irrevocable, and you cannot be the trustee. This is a standard tool recommended by estate attorneys for clients with U.S. life insurance.

Generation-Skipping Transfer Tax (GSTT)

The GSTT is an additional tax on transfers to beneficiaries who are at least two generations younger than the giver (e.g., grandchild). The exemption is the same as the estate tax exemption ($13.61 million in 2024), but the tax rate is a flat 40% on the amount exceeding the exemption (IRS, 2024, Form 709 Instructions).

Planning for Dynastic Wealth

Without GSTT planning, a $10 million gift to a grandchild could incur both gift tax and GSTT. Using a dynasty trust that allocates GSTT exemption can shield the assets for multiple generations. New immigrants with children and grandchildren should discuss GSTT allocation with their planner before making large gifts.

FAQ

Q1: If I give my child $50,000 in one year, do I owe tax immediately?

No, you do not owe tax immediately. The first $18,000 of that gift is covered by the annual exclusion. The remaining $32,000 uses up a portion of your $13.61 million lifetime exemption. You must file Form 709, but no tax is due until your total lifetime gifts exceed $13.61 million.

Q2: What happens to my estate tax exemption if I die in 2025 instead of 2024?

The exemption is indexed for inflation and changes annually. In 2024, it is $13.61 million. The IRS typically releases the next year’s figures in late October. Under current law, the exemption is scheduled to revert to roughly $6 million (adjusted for inflation) on January 1, 2026, unless Congress acts. This is a major concern for new immigrants planning long-term.

Q3: Can a non-resident alien inherit a U.S. bank account without paying tax?

Yes, cash and bank accounts are generally not considered U.S. situs assets for estate tax purposes. However, if the account earns interest, the heir may owe U.S. income tax on that interest. The estate tax exemption for NRAs is only $60,000, so if the deceased had U.S. real estate or stocks, the inheritance could be taxed.

References

• IRS 2024, Estate and Gift Tax FAQs
• IRS 2024, Publication 559 (Survivors, Executors, and Administrators)
• IRS 2024, Revenue Procedure 2023-34 (annual exclusion amounts)
• Massachusetts Department of Revenue 2024, Estate Tax Guide
• UNILINK 2024, Cross-Border Asset Transfer Database