A country doesn’t lose 7% of its millionaires in a single year by accident, and yet Westminster is treating this like background noise.
The Adam Smith Institute has just confirmed what advisers like me have been watching unfold in real time. Sterling millionaires in Britain have fallen to 442,000, the lowest figure since the 2008 crash. The scale of that drop points to a structural shift in who holds wealth in this country, and where.
Plenty of people will shrug at this. Fewer millionaires sounds like a win if you’ve spent years hearing that inequality is Britain’s biggest problem. I’d push back hard on that read. This isn’t redistribution. Nobody got richer because these people got poorer or left.
Look closer at the drivers and the picture gets uncomfortable fast. Weak house prices have eaten into property wealth.
A miserable savings rate means fewer households are climbing into the millionaire bracket in the first place. And running underneath both, a steady, well-documented flow of high net worth individuals choosing to build their future somewhere else entirely.
This third factor is the one that should worry policymakers most, because it’s the one they created.
Scrapping non-dom status was the moment the exits filled up. Since then, endless speculation about a wealth tax has kept the queue moving.
I speak with wealthy families constantly, and the pattern is consistent, and nobody leaves over one policy. They leave because the direction of travel feels unmistakable, and staying starts to look like a bet against your own government.
These decisions don’t happen the week a policy is announced. Families spend months, sometimes years, quietly restructuring, relocating assets, establishing residency elsewhere, long before any of it shows up in official figures. So when a report like this lands, it isn’t predicting the future. It’s confirming decisions that were finalised long ago.
This lag is exactly why the problem is so dangerous. By the time the damage is visible in the numbers, it’s already locked in. You can’t legislate your way back to yesterday’s tax base.
Britain wouldn’t be breaking new ground with a wealth tax either.
France, Austria and the Netherlands all ran the experiment. All three abandoned it once it became obvious that wealthy residents could relocate faster than any tax authority could track them. The lesson from every one of those cases is identical: you cannot tax assets that have already crossed a border.
Britain is shedding high net worth individuals right now, without a wealth tax anywhere near the statute book. Adding one wouldn’t plug the hole. It would widen it, and hand a large number of people who are already wavering the final reason they needed to go.
This isn’t a plea for sympathy on behalf of the wealthy. Consider it a warning about incentives instead. Build a system that assumes capital will simply sit there and absorb whatever comes its way, and you will eventually discover, expensively, that capital was never obligated to stay.
For anyone sitting on significant wealth in Britain right now, the response shouldn’t be fear and it shouldn’t be inertia either. It should be a clear-eyed audit. Where is your money actually exposed, and to which government’s next decision? Pensions, property and investment portfolios all deserve fresh scrutiny now, while there’s still time to act with a plan rather than in a rush.
Spreading wealth across borders isn’t some evasive manoeuvre reserved for the ultra-rich. Think of it as ordinary risk management, applied sensibly to a country that keeps rewriting the rules for the people funding a disproportionate share of its tax revenue.
Capital has never been sentimental. It goes where it feels valued, and it leaves the moment it feels hunted. Watch Britain right now and you’re watching that play out in real time.
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