Exit tax: what it costs to leave before you sell

You built something valuable. Maybe it's a SaaS company doing seven figures in ARR, maybe it's a funded startup approaching a Series B. You're thinking about relocating to a lower-tax jurisdiction before a future sale, and on paper the numbers look compelling. But there's a cost most founders don't account for until it's too late: the exit tax. This is the bill your current country hands you for leaving, calculated on gains you haven't actually realised yet. It treats your departure as if you sold your shares the day you packed your bags, and the resulting tax liability can be staggering. Understanding what it costs to leave before you sell is not optional planning. It is the difference between a smart relocation and a financial disaster.

The concept catches people off guard because it feels counter-intuitive. You haven't sold anything. No cash has changed hands. Yet the government says you owe tax on the theoretical profit embedded in your shareholding. Several European countries enforce versions of this rule, each with different thresholds, rates and deferral mechanisms. If you're a founder or significant shareholder considering a move, the specifics matter enormously. A few months of timing or a slightly different structure can swing the outcome by hundreds of thousands of euros. The same logic that drives how to structure a UAE holding company drives how to leave one, and the latter is where most of the cost sits.

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Why exit tax is the new founder relocation question

Ten years ago, founder relocations were relatively straightforward. You moved, you established tax residency somewhere else, and your old country mostly stopped caring about you. That era is over. Governments across Europe have watched too many high-value individuals leave right before liquidity events, and they've responded with increasingly aggressive departure taxes aimed squarely at shareholders with unrealised gains.

The trigger is simple. When you cease to be a tax resident, certain countries deem you to have disposed of your assets at fair market value on the date of departure. If you hold shares in a company worth significantly more than what you paid for them — which, for most founders, means shares worth far more than their nominal value — the deemed gain gets taxed immediately or placed under a deferred payment arrangement with strict conditions.

This matters more in 2026 than it did even five years ago because startup valuations have climbed, cross-border mobility has increased and tax authorities have got better at sharing information. The EU's Anti-Tax Avoidance Directive (ATAD) established a baseline requirement for member states to implement exit taxation on unrealised capital gains. While each country has implemented it differently, the direction is clear: leaving is no longer free.

For founders specifically, the stakes are unusually high. Your shares might have a nominal cost basis of a few hundred euros but a current fair market value of several million. The deemed gain on departure could easily exceed what you've ever earned in salary. And unlike a normal capital gains event where you receive cash proceeds to pay the tax, an exit tax creates a liability with no corresponding liquidity.

The practical problems cascade from there. How do you value a private company for exit tax purposes? What happens if the company's value drops after you leave? Can you defer payment, and if so, under what conditions? These questions don't have universal answers. They depend entirely on which country you're leaving, where you're going and how your shareholding is structured.

One pattern we've seen repeatedly: a founder gets advice to "just move to Dubai or Portugal" without anyone modelling the departure tax consequences. They start the relocation process, sometimes signing a lease and enrolling children in school, before discovering that their home country wants a six- or seven-figure payment before they're truly free. By that point they've committed emotionally and financially to the move, and they're negotiating from a position of weakness.

The smarter approach is to model the exit tax liability first, before making any decisions about destination. This means getting a proper valuation of your shares, understanding the specific rules of your departure country, and building a timeline that accounts for deferral options, instalment payments or treaty protections that might apply. The same discipline applies to exit planning at the company level, and the two strands should be modelled together.

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Germany: the thirty per cent bill that follows you out

Germany's exit tax rules are among the most aggressive in Europe, and they hit founders particularly hard. Under Section 6 of the German Foreign Tax Act (AStG), if you hold at least 1% of a corporation and you leave Germany, the country treats your departure as a deemed disposal of those shares at fair market value. The resulting gain gets taxed at roughly 26.375%, the flat rate for capital gains including solidarity surcharge, though in some structures the effective rate can climb higher.

Here's what makes Germany's version especially painful for founders: the 1% threshold is trivially easy to meet. If you founded the company, you almost certainly hold more than 1%. And because your cost basis is likely the nominal share capital you contributed at incorporation, the deemed gain is essentially the entire current value of your shareholding.

Consider a concrete example. You founded a GmbH five years ago with €25,000 in share capital. The company is now valued at €5 million based on a recent funding round. If you leave Germany, the deemed gain is roughly €4,975,000. At the applicable rate, you're looking at a tax bill of approximately €1.3 million, and you haven't sold a single share.

Germany does offer a deferral mechanism for moves within the EU or EEA. If you relocate to another member state, you can apply for an interest-free, indefinite deferral of the exit tax. The tax doesn't disappear; it sits as a latent liability that crystallises if you eventually sell the shares or move outside the EU/EEA. The deferral comes with reporting obligations: you need to file annual declarations confirming you still hold the shares and still reside within the EU/EEA.

Moving to a non-EU country like the UAE or Switzerland changes the picture dramatically. In that case, Germany generally requires payment, though instalment arrangements over seven years may be available. The tax authority will also want security for the deferred amount, which can mean providing bank guarantees or other collateral.

The valuation question is where things get genuinely complicated. For a publicly traded company, fair market value is straightforward. For a private startup, it's anything but. The Finanzamt will scrutinise whatever valuation you present. If you had a recent funding round, they'll likely use that as a reference point, even if the round included liquidation preferences or other terms that make the headline valuation misleading for common shareholders. If there's no recent round, you'll need an independent valuation, and the methodology matters. DCF models, comparable transactions and asset-based approaches can produce wildly different numbers.

One critical planning point: the timing of your departure relative to value-creating events matters enormously. If you're expecting a significant increase in company value — a new contract, a product launch, or a funding round — leaving before that event can reduce your deemed gain substantially. This isn't aggressive tax planning. It is basic awareness of how the rules work. But it requires advance planning, often 12 to 18 months ahead of the actual move.

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France and Spain: the unrealised gain trap

France's exit tax has been through several iterations, and the current version, while less immediately punitive than Germany's, still creates real exposure for founders. Under Article 167 bis of the French Tax Code, individuals who have been French tax residents for at least six of the ten years preceding their departure face an exit tax on unrealised gains exceeding €800,000 in value, or on shareholdings representing at least 50% of a company's profits.

The French rate is 30% under the flat tax (prélèvement forfaitaire unique), which covers both income tax and social contributions. For a founder holding shares worth €3 million with a near-zero cost basis, that's a potential liability of around €900,000.

France does grant an automatic deferral for moves within the EU, EEA, or countries with a qualifying tax treaty. The deferral is interest-free but requires you to file an annual declaration (form 2074-ETD) and report any events that would trigger the tax, such as selling the shares. If you sell within two years of departure, the French exit tax applies in full. If you hold the shares for at least two years and then sell them while still a non-resident, the exit tax is typically cancelled, but only if you moved to a qualifying jurisdiction.

This two-year holding period creates a specific planning window. Founders who know they want to sell should think carefully about whether to relocate at least two years before a potential exit. The sequence matters: move first, wait two years, then sell. Reversing that order, or compressing the timeline, can result in paying both the French exit tax and capital gains tax in your new country of residence.

Spain takes a different approach that's worth understanding if you've been operating there. The Spanish exit tax under Article 95 bis LIRPF applies to individuals who have been tax resident for at least ten of the fifteen years preceding departure. It targets shareholdings worth more than €4 million, or stakes of 25% or more in companies worth over €1 million. The tax rate follows Spain's progressive savings tax scale, which in 2026 reaches 28% for gains above €300,000.

Spain's deferral rules for EU moves mirror the ATAD framework, but the administrative requirements are strict. You need to appoint a tax representative in Spain, provide a guarantee for the deferred amount and file annual compliance declarations. Missing a filing deadline can trigger immediate collection of the full amount.

A pattern worth noting across all three countries: the interaction between exit taxes and double tax treaties is complex and often misunderstood. Many founders assume that a tax treaty with their destination country will eliminate the exit tax. In practice, most treaties allocate capital gains taxation rights to the country of residence, which would theoretically override the exit tax. But countries like France and Germany have argued that the exit tax crystallises before departure, meaning the treaty doesn't apply because you were still resident when the deemed disposal occurred. This argument has been tested in courts with mixed results, and it's not something to rely on without specific legal advice.

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Italy: the flat tax that ends the day you leave

Italy is one of the few large European countries that does not impose a general exit tax on individuals holding shares in their personal name. The other is the United Kingdom, at least for now. For a founder with a private shareholding sitting on substantial unrealised gain, that absence alone is worth noting.

The Italian angle for founders has not been "leave without a charge". It has been "live there for a few years under the flat tax regime first". Article 24-bis of the Italian Income Tax Code lets a new resident pay a single annual substitute tax on all foreign-source income, including foreign dividends, interest and most capital gains on foreign shareholdings. For elections made from 1 January 2026 onwards, the headline figure rose to €300,000 per year (up from €200,000 under the 2026 Budget Law), with an additional €50,000 per year for each family member who joins. Existing electors are grandfathered at €200,000 for the rest of their term.

The regime runs for up to fifteen years. During that period, foreign-source income is sheltered from Italian ordinary tax in exchange for the flat charge, and Italian-source income is taxed normally. When you cease to be Italian resident, the regime ends. There is no deemed disposal, no exit charge on your shareholding and nothing further to pay.

The practical effect is that Italy can sit between a high-tax departure country and a final no-tax base. A French or German founder can move to Italy, hold their shares through the flat tax regime for the holding period required by their old country's exit rules (two years for France, indefinite for Germany under the EU deferral), and then either stay long term or move on without dragging a deferred exit tax behind them.

The trade-offs are real. €300,000 a year for a founder whose foreign income would otherwise be taxed at much higher European rates is highly efficient. For a founder with no current foreign income beyond modest dividends, it is poor value. The regime suits the founder who has already realised cash, or who will, more than the founder whose value is locked inside a single private company yet to liquidate.

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The UK: no exit charge, the consultations to watch

The UK currently imposes no general exit charge on individuals leaving the country with embedded gains. A founder who breaks UK residence under the Statutory Residence Test takes their shares out of the UK tax net at their existing base cost. If they then sell those shares while non-resident, the gain is taxed in their new country of residence, not the UK. That is materially different from the German position, and it is why founders who care about exit tax map their relocation against the UK as a comparator. The same maths sits behind what European founders should do before moving to the UAE.

Two things qualify that position. First, the temporary non-residence rules. If you leave the UK and return within five complete tax years, gains you realised while non-resident on assets you held when you left are taxed in the year of your return. The five-year clock is the rule founders most often underestimate. Second, the political direction. The departure of high-profile UK-based founders, most visibly the Revolut founder Nik Storonsky to Dubai in 2024, has reopened the policy debate. Tax Policy Associates and others have put detailed exit tax proposals on the table. HMRC has consulted on temporary non-residence and anti-forestalling measures more than once in the past three years. A UK exit charge is not in force as at June 2026, but the consultations are worth watching.

The practical planning point for UK-resident founders is straightforward. The window in which a UK move is materially cheaper than a French or German move on exit-tax grounds is open. It may stay open for several years. It may also close at a fiscal event with little notice. Founders who would benefit from leaving before they sell should treat that window as finite, not permanent, and approach it the same way the Cosmos team approaches a UK-to-UAE business relocation: plan and act before the rule changes around you.

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Triggering events the rules count, and the ones they do not

Most exit tax bills are crystallised by one of three events: ceasing to be tax resident in the departure country, transferring shares into a non-resident structure while still resident, or dying and passing the shares to a beneficiary in a different jurisdiction. The first is the one founders deal with deliberately. The second and third catch the unprepared.

Ceasing to be resident is the critical trigger, and what that means varies by country. In Germany, it is ceasing to hold a place of dwelling (Wohnsitz) or habitual abode (gewöhnlicher Aufenthalt) under §§ 8 and 9 of the General Fiscal Code. In France, it is failing every limb of the residence tests in Article 4 B of the Tax Code. In Spain, it is failing the 183-day test and the centre-of-economic-interests test under Article 9 LIRPF. The tests are technical and the answer is not always obvious. Founders who keep a flat in Paris or a house their family uses in Munich are often still resident in the departure country in the year they thought they had left.

Events that do not trigger the exit tax in most regimes include moving the company's operations or staff without moving the shareholder; selling part of the holding while remaining resident (a normal capital gains event, not an exit event); and electing under a treaty to be deemed resident elsewhere without breaking domestic residence. The last is a particular trap. Treaty residence and domestic residence are different concepts. Being a treaty resident of the UAE under a tie-breaker does not, by itself, make you a non-resident of Germany for exit tax purposes. The same warning applies to the substance question every cross-border founder eventually meets: paperwork that looks like residence elsewhere is not residence elsewhere.

The threshold rules matter as much as the trigger. Germany's exit tax bites at a 1% shareholding, a threshold most founders cross at incorporation. France's bites at €800,000 of total share value, or a 50%+ profit interest. Spain's bites at €4 million of value or a 25% stake in a company worth over €1 million. Below the threshold in any given regime the departure is not an exit event for that country. Above it, your individual position needs modelling against the specific rule, not against the popular summary.

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What to do twelve months before you move

The single most important thing you can do is start planning early. Exit tax liabilities are calculable, and in most cases they're manageable if you know about them 18 to 24 months before your move. The founders who get hurt are the ones who discover the rules after they've already committed to leaving.

Get a proper valuation of your shares before you do anything else. This isn't a back-of-envelope exercise. You need a defensible number that will withstand scrutiny from the tax authority in your departure country. If you've had a recent funding round, understand how liquidation preferences, anti-dilution provisions and option pools affect the fair market value of your specific share class.

Consider the destination carefully. Moving within the EU generally gives you access to deferral mechanisms that can eliminate the immediate cash impact. Moving outside the EU, to the UAE for example, typically triggers an immediate or near-immediate payment obligation. That doesn't mean non-EU moves are wrong, but the cost of leaving before you sell becomes a real, present expense rather than a deferred one. If your destination is the UAE, the Golden Visa route through business ownership is the immigration leg of the same decision and should be modelled alongside the tax leg.

Work with advisers who understand both sides of the border. A German tax adviser who doesn't understand UAE substance requirements, or a Dubai consultant who doesn't know how the Finanzamt operates, will give you incomplete advice. Cross-border relocations require cross-border expertise, and the cost of getting it right is a fraction of the cost of getting it wrong.

If you're a founder weighing a move, start with the exit tax calculation. Everything else, the holding company, the tax registrations, the bank accounts, the visa, follows from that number. Cosmos models the position for founders leaving Germany, France, Italy, Spain or the UK, and runs the structure and substance on the other side. Tell us your departure country, your shareholding and your earliest realistic exit date, and we'll come back with the bill, the deferral options and the twelve-month plan to bring it down.