Helen did not hit the wall at the funeral. She hit it eleven weeks later, on an ordinary Wednesday, when she asked her late husband's broker to move his shares into her name.
She had done the obvious, decent thing and told them he had passed away. The reply, when it finally came, was courteous and utterly immovable. Before a single American share could be released, sold or retitled, the estate would first need a transfer certificate from the US Internal Revenue Service. And the IRS does not hand over that certificate until it is satisfied that any US estate tax has been paid in full. Her husband, a retired Auckland engineer, was not American and had never lived a single day in the United States. It changed nothing. He had spent thirty patient years buying the companies he admired, Apple, Microsoft, a thick slab of the S&P 500, doing precisely what every sensible book tells you to do: buy quality, hold, let it compound. And now the United States was, in effect, a beneficiary of his estate, standing first in the queue ahead of his own widow, entitled to as much as 40 percent of those shares above an exemption of just sixty thousand dollars.
The money sat there on the screen, in full view. Helen simply could not touch it. She had assumed the worst of widowhood would be the grief. The worst, it turned out, was paperwork with teeth, and a foreign tax collector she never knew her husband had signed up for.
The tax you were sure you had escaped
Here is the part that makes people sit down slowly. The United States taxes the worldwide estate of its own citizens and residents, and it shelters them generously: for 2026 the exemption sits at fifteen million dollars per person. But if you are not American and not US-domiciled, you are a "non-resident alien" in the eyes of the Internal Revenue Code, and the deal on offer is savagely different. Your American assets are taxed. Your exemption collapses from fifteen million to sixty thousand dollars, with rates climbing to 40 percent.
And US shares are American assets, full stop. This is the detail that ambushes almost everyone. It does not matter where your broker sits. Your Apple stock held in a London ISA is a US-situs asset. Your Tesla position on a Sydney trading app is a US-situs asset. Your index fund bought through a Scandinavian bank, if that fund is domiciled in the United States, is a US-situs asset. The certificate can live in Zurich, Auckland or Oslo. The tax lives in Washington.
Worse, the machinery grinds at exactly the wrong moment. When a non-resident dies holding US stock, the American broker can be treated as the "executor" under US law, and brokers do not release a cent until the estate has filed Form 706-NA and obtained a federal transfer certificate clearing the account. Grieving families in Manchester, Melbourne and Malmö have waited eighteen months and more, unable to touch the money, while lawyers on two continents pass documents back and forth. The wealth is there. The family simply cannot have it yet.
The cruel geography of dying
Now for the part that should make you genuinely angry, because whether your family keeps that wealth or hands nearly half of it to a foreign treasury comes down to something as arbitrary as which passport you hold.
If you are British, breathe out. The US-UK treaty is one of the most generous in the world. It lifts shares in US companies almost entirely out of the American estate tax net and treats them as taxable, in effect, only at home. A UK-domiciled investor with a portfolio stuffed full of American tech can, with correct handling, pass those shares to the next generation with no US estate tax at all. The Danes enjoy a similar shield. So do the Germans, the French, the Dutch and the Austrians, under the small club of modern "domicile" treaties the United States has signed.
If you are Australian or Canadian, you are half-covered, and the half matters. Neither treaty carves your US shares cleanly out of the American net the way the British one does. What they give you instead is a pro-rata credit: a slice of the full American exemption, scaled to how much of your total wealth is American. The rule of thumb worth tattooing on your wrist is this. If your worldwide estate sits comfortably under fifteen million dollars, that pro-rata credit will usually wipe the US estate tax on your shares down to zero. Climb above that line, and the exposure wakes up and starts to bite. So the Aussie GP with two million in American stock is likely fine. The Australian founder who sold a company and rolled the proceeds into a US-heavy portfolio may not be.
And if you are a Kiwi, a Swede or a Norwegian, brace yourself, because you are wearing no armour at all. New Zealand has no estate tax treaty with the United States. Sweden's was torn up in 2008. Norway's followed in 2015. Each of those countries proudly abolished its own inheritance tax and told its citizens the death tax was history. It was a half-truth. It killed the domestic one and left the American one standing, uncovered, unmentioned. A New Zealander who dies with one million dollars of US stock faces a US estate tax bill of roughly three hundred and thirty thousand dollars. Not because New Zealand wants it. Because nobody negotiated it away, and nobody told them to look.
Read that geography again. The countries whose citizens feel most immune to death taxes, because they scrapped their own, are precisely the ones whose citizens are most exposed to America's. The sense of safety is the trap.
Why the offshore company is the wrong answer at home
There is a clean, brutal fix that works beautifully in the right circumstances: put the US shares inside a non-US holding company. You no longer own American stock. You own shares in a foreign company that happens to own American stock, and shares in a foreign company are not US-situs. The 40 percent ghost has nothing to grip.
This is a superb solution if you live somewhere like Dubai. No local corporate tax, no controlled-foreign-company rules reaching in to tax the entity's income as though it were yours, no domestic anti-avoidance regime treating the whole thing as a sham. The blocker simply works.
Take that same structure home to a high-tax country and it detonates. Set up an offshore company while you are living in London, Toronto, Sydney or Stockholm and you walk straight into controlled-foreign-company rules that attribute the company's income back to you and tax it in real time. You risk the company being deemed tax-resident where you actually live, because that is where it is managed, dragging it into local corporate tax. You inherit reporting obligations, anti-avoidance provisions, and often an ugly layer of double taxation. You will have solved a tax that only bites when you die by creating three that bite every single year you are alive. For a resident of a high-tax country, the offshore blocker is not a shield. It is a self-inflicted wound.
The elegant escape: change the wrapper, not the strategy
So what does the Brit, the Aussie, the Kiwi, the Scandinavian actually do, without leaving home and without building a monster? You keep the exposure and change the wrapper.
The single most powerful move for most people is to stop buying US-domiciled funds and buy non-US-domiciled ones that hold the very same American companies. An Irish-domiciled S&P 500 fund gives you identical exposure to the same five hundred American giants, but the fund itself is Irish, not American, so it is not a US-situs asset for estate tax. The ghost never appears. As a bonus, these wrappers typically cut the dividend withholding tax you suffer from 30 percent down to 15 percent. You get the same market, a lower drag, and no death-tax time bomb. Same strategy. Different envelope. (Canadians have home-listed equivalents; Australians should mind their own local fund rules, but the principle holds everywhere: the domicile of the fund is what the IRS looks at.)
The second move is quieter and almost magical in its simplicity. You can give the shares away while you are alive. A non-resident's gift of US stock is a gift of intangible property, and under US law gifts of intangible property by non-residents are simply not subject to US gift tax. No treaty required. So the very shares that would be taxed at up to 40 percent if you die holding them can, in many cases, be passed to your children or into a properly built structure during your lifetime with no US gift tax at all. What the United States taxes savagely at death, it often waves through entirely as a lifetime gift. (Do check your home country's gift rules, which are a separate question, and steer clear if you are a US "covered expatriate," where different and harsher rules apply.)
The third, for those who would rather insure the risk than restructure the portfolio, is simple life cover sized to the potential liability, so the bill lands on a policy rather than on your family's inheritance.
The point of all of this
Helen's husband was not careless. He was diligent. He backed the best companies on earth and he was rewarded for it, right up until the machinery he never knew existed took a bite he never agreed to. That is the quiet cruelty of this tax. It does not punish recklessness. It punishes ignorance, and it does its worst on the day a family is least able to fight back.
You have exactly one estate. You get one chance to hand it on cleanly. The good news is that this particular ghost is banished not with heroics but with an afternoon of correct decisions: the right wrapper, the right jurisdiction for any structure, the right gifts made in good time, the right cover in place. Do that work while the sun is up, and your family inherits your judgement instead of your oversight.
Life is short and fleeting. You get one shot. Make sure the wealth you spent it building ends up with the people you love, and not with a treasury that never had any claim on your labour to begin with.
This article is general information, not personal tax or legal advice. Cross-border estate planning turns on the fine print of your own domicile, residence and holdings, so take specific advice before you act.