Leaving France doesn’t switch off your relationship with the French tax system — it just makes it more complicated. If you’re a French expat, whether you’ve moved to Cape Town, London, Dubai or anywhere in between, “offshore investing” is often less an exotic choice than the practical way to hold money when your life no longer sits neatly inside one country. This is a plain-English look at what actually changes for French citizens abroad, and what to get clear on before you invest.

Start with the question that decides everything: are you still a French tax resident?

Whether you still owe French tax isn’t decided by how you feel or even by where you spend most of your time — it’s decided by whether you remain a French tax resident, your domicile fiscal. That status turns on a specific set of criteria: where your home is, where your main economic interests lie, and where you carry on your professional activity, among others. Plenty of people assume that boarding a one-way flight ends their French tax residency; the reality is more precise, and getting it wrong is expensive. Before you make any investment decision as an expat, it’s worth establishing your domicile fiscal position with a qualified French tax adviser, because almost everything else follows from it.

What happens to your assurance-vie

The assurance-vie is the wrapper most French savers know best — the default home for long-term investment and savings inside France — so it’s worth being clear about what leaving does to it. You can normally keep an existing assurance-vie after you leave France, and the contract carries on as before. What can change is how it’s treated. The favourable tax handling an assurance-vie enjoys is a French benefit; the country you now live in may tax the contract under its own rules and may not recognise the wrapper as anything special at all. A contract that was doing a great job while you lived in France may be doing quietly less for you abroad, and in some cases your provider’s willingness to keep servicing a non-resident can itself change. It’s worth reviewing rather than assuming.

The one to understand before you go: the exit tax

Here’s the quietly important one for anyone with meaningful holdings. When someone who has been a French tax resident and holds substantial investments moves their residence out of France, the French exit tax can bring unrealised gains on those holdings into charge — in effect, treating part of your portfolio as if you’d sold up on the way out, even though you haven’t. There are mechanisms to defer it and, in some circumstances, to have it fall away over time, but the point is that it exists and it bites on the way out rather than the way in. It’s not a reason to panic, but it is a reason to understand your position before you move rather than discover it afterwards. This is squarely a question for a qualified French tax adviser looking at your actual holdings.

Wealth tax on property: the IFI in the background

France also levies a wealth tax focused on real estate — the IFI, the impôt sur la fortune immobilière. If you keep property in France after you leave, or hold French real estate through certain structures, the IFI can still be relevant to you as a non-resident in a way that purely financial assets often aren’t. It’s not the main event for most people building an investment portfolio, but it’s worth knowing it sits in the background, especially if a French home or rental property is staying behind while you go. Where it applies is, again, a question for a qualified French tax adviser rather than an assumption.

Your French pension: review, don’t rush

For many French expats the pension is one of the biggest pieces of the picture, and it attracts a fair amount of aggressive marketing — so this is where to be most careful. French state and occupational pension entitlements built up over a working life can usually be reviewed so you can actually see what you have, how it fits with anything you’re building elsewhere, and how the country you’ve moved to will treat it. What you should be wary of is anyone pushing you to move retirement money quickly into an unfamiliar offshore structure with layers of fees. In a lot of cases the sensible route is to review and consolidate what you have and keep it appropriately invested, rather than rush a transfer you don’t fully understand. It’s a review, not a race.

Currency: are you still thinking in euros?

If you earn, spend and plan to retire in another currency, holding everything in euros concentrates a risk you may not have chosen deliberately. Equally, if you intend to return to France one day, going all-in on your new home currency does the same in reverse. This is where an offshore structure earns its keep for expats: it lets you hold hard-currency assets — euros, dollars, sterling — matched to where your future spending is actually likely to happen, rather than leaving it to whichever country you happened to land in.

What to check before you invest offshore

The scrutiny that matters for a French expat is the same discipline you’d apply to any investment, plus a couple of cross-border specifics:

If you’re still getting your head around the basics, it’s worth reading up on what “offshore” actually means and how the offshore side of things fits together before you commit to anything.

Frequently asked questions

Am I still a French tax resident after I leave France?

Not automatically, but not automatically ended either. French tax residency — domicile fiscal — is decided by a specific set of criteria such as where your home and main economic interests sit, not simply by where you happen to be living. Establishing your position clearly with a qualified French tax adviser is the sensible first step, because much of what follows depends on it.

What happens to my assurance-vie when I leave France?

You can usually keep an existing assurance-vie after you leave, and the contract carries on. What can change is how it’s treated for tax — the favourable French treatment is a French benefit, and the country you now live in may tax the contract under its own rules and may not recognise the wrapper at all. It’s worth reviewing rather than assuming it still does the same job abroad.

Do I still owe French tax after I move abroad?

It depends on your residency. Whether you remain a French tax resident turns on the domicile fiscal criteria rather than on where you sleep, and some French charges can still reach assets you keep in France after you leave. Confirming your position with a qualified French tax adviser is the sensible starting point.

How much do I need to start investing offshore?

As a rough guide, lump-sum offshore portfolios often start from around $100,000 or the euro equivalent, and regular offshore savings plans from a few hundred a month on a ten-year-plus horizon. The right starting point depends on your circumstances, which is exactly what an introductory call is for.

Offshore guides for other nationalities

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This article is for general information only and does not constitute financial or tax advice. French residency, the exit tax and cross-border tax treatment depend entirely on your personal circumstances — confirm your position with a qualified French tax adviser before acting.