Moving your investments offshore does not save inheritance tax if you are a U.S. citizen or U.S. domiciliary. Federal law taxes your worldwide assets at death based on who you are, not where the money sits, so a brokerage account in Zurich or a condo in the Caribbean lands in your taxable estate the same way your house on Main Street does. For 2026, the federal estate tax exemption is $15 million per person, and estates above that face a top rate of 40%.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Offshore investing typically produces the opposite of tax relief: heavier reporting, penalty exposure, and worse income tax on the earnings those assets generate while you’re alive.
Worldwide Assets Are Taxed Regardless of Location
The Internal Revenue Code defines the gross estate as every piece of property you own at death — real or personal, tangible or intangible, “wherever situated.”2Office of the Law Revision Counsel. 26 USC 2031 – Definition of Gross Estate Those two words end the offshore strategy before it starts. A deposit in the Cayman Islands, shares in a Singapore fund, and a rental in Portugal are all pulled into the calculation exactly as if they sat in a domestic account.
The tax obligation follows the person. If you are domiciled in the United States when you die, the IRS has jurisdiction over your entire global net worth for estate tax purposes. Restructuring ownership through foreign entities can change how income is taxed during your lifetime, but it does not remove the underlying value from your taxable estate. People who believe otherwise are usually confusing income tax planning with estate tax planning.
For most Americans the exemption itself makes the question moot. A married couple can shelter up to $30 million from federal estate tax through the deceased spouse’s unused exclusion.3Office of the Law Revision Counsel. 26 USC 2010 – Unified Credit Against Estate Tax The rate schedule starts at 18% and climbs to 40% only on amounts roughly $1 million past the exemption.4Office of the Law Revision Counsel. 26 US Code 2001 – Imposition and Rate of Tax If your estate is well below $15 million, offshore restructuring solves a problem you don’t have while creating several you will.
Domicile, Not Where Your Money Lives
The IRS looks at where you live with the intent to stay. You establish a domicile by living somewhere with no definite present intention of leaving, a standard that turns on genuine intent rather than time counted on a calendar.5eCFR. 26 CFR 20.0-1 – Introduction Residing somewhere temporarily doesn’t shift your domicile, and declaring an intent to move without actually leaving doesn’t either.
That’s why maintaining an address in a low-tax jurisdiction or spending a few months abroad each year changes nothing. The IRS weighs the totality of your ties: where your family lives, where you vote, where your business connections run, where you consistently return. Moving assets across a border while keeping your life centered in the United States has no effect on your domiciliary status, and therefore no effect on estate tax.
When Asset Location Does Matter
Every asset has a legal location for tax purposes, called its situs. For U.S. domiciliaries this is largely academic because the worldwide estate is taxable anyway. Situs matters in two narrower situations: when a foreign country also wants to tax the same asset, and when a non-U.S. person owns property inside the United States.6Office of the Law Revision Counsel. 26 USC 2104 – Property Within the United States
Some planners restructure ownership to change an asset’s situs on paper. Holding a foreign rental property through a foreign corporation, for example, converts your interest from direct real estate into shares in that entity. This can shift treaty analysis or matter for non-U.S. persons. It does not remove the asset from a U.S. domiciliary’s worldwide estate. The IRS still counts the value of whatever you own, including the shares in the foreign entity.
If foreign estate or inheritance tax does hit assets that also sit in your U.S. gross estate, federal law provides a credit for the foreign death taxes actually paid, subject to a formula-based cap and a four-year claim deadline.7Office of the Law Revision Counsel. 26 USC 2014 – Credit for Foreign Death Taxes The United States also has estate and gift tax treaties with roughly 15 countries that can modify the default rules.8Internal Revenue Service. Estate and Gift Tax Treaties (International) These provisions relieve double taxation; they do not create an offshore escape from U.S. tax.
Renouncing Citizenship Triggers Its Own Tax
Some people follow the logic to its endpoint: if domicile drives estate tax exposure, why not give up U.S. citizenship or long-term residency? Congress closed that door. Under section 877A, certain individuals who renounce citizenship or terminate long-term residency are treated as having sold all their worldwide assets at fair market value on the day before they leave.9Office of the Law Revision Counsel. 26 USC 877A – Tax Responsibilities of Expatriation
This mark-to-market regime applies to “covered expatriates,” a category that captures anyone with a global net worth of $2 million or more, anyone whose average annual net income tax liability over the preceding five years exceeds an inflation-adjusted threshold, and anyone who cannot certify full tax compliance for the prior five years. Gain on the deemed sale is excluded up to $890,000 for 2025; everything above that is taxed as ordinary income in the year of expatriation.10Internal Revenue Service. Expatriation Tax For someone with significant unrealized gains, the exit tax can exceed what estate tax would have cost.
The exit tax is an additional cost triggered by leaving, not a replacement for estate tax. And the $2 million net worth trigger catches essentially everyone whose estate would otherwise face estate tax in the first place.
Offshore Funds Get Punished by the PFIC Rules
Set the estate tax aside entirely. Offshore fund investments often produce a worse income tax result during your lifetime. Most foreign mutual funds, ETFs, hedge funds, and certain foreign insurance products qualify as passive foreign investment companies, or PFICs, under U.S. tax law. The PFIC rules were written specifically to eliminate any tax advantage from parking money in foreign funds that accumulate income without distributing it.
Under the default method, any gain when you sell PFIC shares, and any distribution that exceeds 125% of the average of the prior three years’ distributions, gets spread ratably across every year you held the investment. Each year’s slice is then taxed at the highest individual rate that was in effect for that year, regardless of your actual bracket, and the IRS layers interest on top as if you had underpaid tax in each of those prior years.11Office of the Law Revision Counsel. 26 USC 1291 – Interest on Tax Deferral The interest compounds.
Long-term capital gains rates that apply to domestic investments are gone. PFIC income is ordinary income across the board. Compliance is per-fund: a separate Form 8621 for each PFIC in any year with a distribution, a sale, or a required annual report.12Internal Revenue Service. Instructions for Form 8621 (Rev. December 2025) The offshore fund strategy therefore stacks higher income tax rates, interest charges, and extra filings on top of zero estate tax benefit.
The Reporting Burden and Its Penalties
Holding assets outside the United States triggers multiple annual disclosure obligations. Miss them and the penalties can dwarf whatever a client thought they were saving.
FBAR (FinCEN Report 114)
If the combined value of your foreign financial accounts exceeds $10,000 at any point during the year, you must file the Report of Foreign Bank and Financial Accounts through FinCEN’s BSA E-Filing System. The FBAR is due April 15 with an automatic extension to October 15 — no request required — and is filed separately from your tax return, directly with the Treasury Department.13Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR)
A non-willful violation can cost up to $10,000 per account per year, adjusted for inflation. A willful violation carries a penalty equal to the greater of $100,000 or 50% of the highest account balance during the year, with criminal prosecution possible in egregious cases. The penalty runs per violation, so someone with multiple unreported accounts can face exposure that exceeds the accounts’ total value.
Form 8938
Separately, you must attach Form 8938 to your annual tax return if your foreign financial assets exceed certain thresholds. For unmarried taxpayers living in the United States, the basic trigger is $50,000 in total foreign asset value at year-end or $75,000 at any point during the year.14Internal Revenue Service. Do I Need to File Form 8938, Statement of Specified Foreign Financial Assets? Married joint filers and taxpayers living abroad have higher thresholds. Failure to file carries a $10,000 penalty with additional penalties for continued noncompliance after IRS notice.
FBAR and Form 8938 overlap but are not interchangeable. Different agencies, different thresholds, slightly different asset categories. Filing one does not satisfy the other.
Foreign Trusts (Form 3520 and 3520-A)
Placing offshore assets into a foreign trust adds another layer. If you create a foreign trust, transfer property to one, or receive distributions from one, you file Form 3520 with your return.15Internal Revenue Service. Instructions for Form 3520 A trust is foreign if either no U.S. court can exercise primary supervision over its administration, or no U.S. person controls all substantial decisions.
The penalties are the harshest in the offshore reporting regime. Failing to report a transfer to a foreign trust triggers a penalty of 35% of the gross value of the property transferred. Failing to report a distribution received from a foreign trust: 35% of the distribution. If the trust fails to file its own annual Form 3520-A and the U.S. owner does not file a substitute, the penalty is 5% of the trust’s total assets each year.15Internal Revenue Service. Instructions for Form 3520
Transferring assets to a foreign trust with a U.S. beneficiary also generally causes the transferor to be treated as the owner of that trust for income tax purposes under the grantor trust rules, meaning you still pay U.S. income tax on the trust’s earnings as if you held the assets directly.16Internal Revenue Service. Foreign Trust Reporting Requirements and Tax Consequences And because the assets remain part of your worldwide estate, the trust adds cost and penalty risk without reducing estate tax.
What Actually Reduces Federal Estate Tax
If your estate is large enough to exceed $15 million, legitimate planning tools exist. They just don’t involve moving money across borders. Irrevocable trusts, charitable giving, lifetime gifts within the annual exclusion, and family limited partnerships can reduce the taxable estate when properly implemented. Each works by actually transferring ownership during your lifetime, not by relocating where the assets are held.
For married couples, portability of the unused exemption transfers the first spouse’s unused exclusion to the survivor, effectively doubling available shelter to $30 million.3Office of the Law Revision Counsel. 26 USC 2010 – Unified Credit Against Estate Tax Claiming portability requires filing an estate tax return for the first spouse to die even if no tax is owed. That step gets missed more often than it should.
Offshore investing can serve legitimate goals such as currency diversification or access to foreign markets. Reducing federal estate or inheritance tax is not one of them. For anyone who is a U.S. citizen or domiciliary, the assets travel with the person for tax purposes, and the reporting and PFIC costs of holding them abroad make the offshore route a net negative compared with equivalent domestic investments.