France-Portugal Exit Tax: Who Is Concerned and How to Plan Ahead
Audrey Marques
Consultant in business establishment & company formation in Portugal
Founder of Business Portugal, Audrey supports French-speaking entrepreneurs in setting up their company in Portugal and opening their bank account. She coordinates a network of partners (accountant, tax adviser) and points clients to the right contacts, she is neither an accountant, nor a tax adviser, nor a lawyer.
"Exit tax": the term circulates in expat groups and worries people, often wrongly. Many entrepreneurs considering a move to Portugal believe it is a tax on leaving France, or a tax on the income they will later earn abroad. It is neither. The exit tax is a precise mechanism, set out in article 167 bis of the French General Tax Code (CGI), that concerns only a minority of profiles. This article explains what it is, who may be targeted and why the subject must be prepared before departure, not after. One essential point up front: detailed tax matters are the domain of a tax lawyer. Business Portugal supports company formation and setting up in Portugal and guides you; on the exit tax, our role is to connect you with a tax specialist, not to quantify your situation.
What the exit tax really is (and what it is not)
The exit tax is the taxation of unrealised capital gains at the moment a person transfers their tax domicile out of France. "Unrealised" is the key word: these are gains not yet crystallised, that is, the increase in value of shares you still hold and have not sold. Departure triggers taxation "as if" you had disposed of those shares on the day of the transfer. It is therefore not a penalty for leaving the country, nor a levy on your future Portuguese income.
Its scope is targeted: it is gains on important shareholdings that are concerned, not your entire estate. An employee with no significant holding, a self-employed person with no company shares, a holder of a few low-value listed shares are, as a rule, outside its reach. The exit tax was designed for situations where a director or shareholder holding a substantial stake in a company moves their residence abroad while carrying a significant unrealised gain.
Note too: transferring your tax domicile out of France is not merely an administrative declaration. It is established against factual criteria defined in article 4 B of the CGI (home, main place of stay, professional activity, centre of economic interests). You do not "choose" your tax residence by simply ticking a box: it is the analysis of your real situation that determines whether, and when, the transfer occurred, and therefore whether the exit tax applies.
Who is concerned by article 167 bis
The mechanism targets taxpayers who hold important shareholdings at the time of their departure. The law defines this "important" character through thresholds, expressed as a percentage of ownership in a company and/or the value of the shares concerned. These thresholds exist precisely to exclude small holders and to focus the mechanism on significant holdings, typically those of founders, directors and reference shareholders.
We deliberately do not reproduce precise figures here. The thresholds, how they interact and how they are assessed case by case (shares held directly or through a holding company, split ownership rights, multiple holdings) are exactly the kind of parameters that must be verified by a tax specialist against your dated situation. A loose reading of a threshold can lead someone to believe they are out of scope when they are not, or the reverse. If you are a founder or significant shareholder of a company and are considering Portugal, assume the subject must be examined, then have it settled by a professional.
The payment deferral to the EU, including Portugal
This is the most reassuring point, and the most misunderstood. The exit tax does not mean you must pay the tax out of pocket on the day of departure. When the transfer is made to a Member State of the European Union or the European Economic Area, a payment deferral applies automatically, with no particular guarantee to provide. As Portugal is a Member State of the European Union, this automatic deferral regime applies to it directly.
"Automatic" does not mean "without obligations". The deferral is subject to compliance with reporting obligations: correctly declaring the unrealised gains at the time of departure, then maintaining a reporting trail for as long as the shares are held. This is precisely where anticipation matters: a deferral that should have been automatic can be jeopardised by a failure to declare or a neglected follow-up. The mechanism protects you, provided it is properly maintained over time.
Relief and expiry of the taxation
The other good news for those taking a long-term view: the taxation is not definitive. The logic of article 167 bis provides that, after a certain holding period for the shares, and as long as the shares are not sold, the deferred taxation may be relieved, that is, cancelled. In other words, the director who genuinely settles elsewhere and keeps their holdings over the prescribed period is not meant to carry this latent taxation indefinitely.
This holding period and the exact conditions for relief are, once again, numerical parameters we do not detail here: they must be confirmed by a tax specialist, because they shape the entire post-departure holding strategy. An early sale of the shares, for example, can end the deferral and make the tax payable. The rule of conduct is simple: know, before you leave, the holding horizon that secures your situation.
Why to plan ahead before departure, and how we step in
The exit tax is handled calmly, ahead of the domicile transfer, never as catch-up. Three reasons. First, the taxation crystallises on the date of the transfer: you must therefore be clear about the exact moment your tax residence shifts, which means having framed the timeline of the move and the reality of settling in Portugal. Second, the benefit of the deferral and, ultimately, of the relief depends on a rigorous reporting path that begins with the initial declaration. Third, the tax treaty between France and Portugal, signed on 14 January 1971, in force since 18 November 1972 and amended by the protocol of 25 August 2016, frames how taxation is allocated between the two States and deserves to be read alongside your personal situation.
Our job at Business Portugal is not to calculate your exit tax or fill in your French declarations: Audrey is a consultant in company formation and setting up, not a tax lawyer. Our value is to structure your Portuguese project correctly, choice of form (Unipessoal Lda, Lda), NIF, NIPC, registration, connection with a Contabilista Certificado, and to guide you, at the right time, towards a partner tax specialist able to handle the exit tax on the French side. Since 2025, more than 75 entrepreneurs have been supported in this spirit of honest guidance.
The exit tax is not a bogeyman: it is a technical mechanism that, well anticipated, is managed calmly, and that concerns only some entrepreneurs. If you hold a significant shareholding and Portugal is seriously under study, the right instinct is to raise it early, so that we can connect you with a tax specialist before the calendar closes. A framing conversation upstream beats a correction after the fact.
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