October 23, 2025 — Exit tax is the generic name for the body of provisions that tax authorities apply to individuals who change their tax residence away from a jurisdiction. The tax functions as a tollgate: a way for the originating jurisdiction to capture, at the moment of departure, the unrealised appreciation of assets that the individual would otherwise be able to realise in the new jurisdiction at potentially lower tax rates. The mechanism is intuitive in design but variable in implementation. Each major OECD jurisdiction has its own version, with its own scope, mechanics, rates, deferral options, and procedural requirements. An individual contemplating relocation must understand the specific regime that applies to them; generic intuitions about exit tax can mislead in either direction.

This article reads the exit tax regimes of six major OECD jurisdictions — France, Germany, the Netherlands, Spain, the United Kingdom, and the United States — in parallel. The reading is comparative rather than exhaustive. The intent is to identify the structural similarities and the structural differences, and to provide the practitioner with a framework for analysing specific cases.

The conceptual basis for exit tax

The conceptual basis for exit tax is the proposition that an individual's accumulated unrealised appreciation in assets is, in some economic sense, attributable to the jurisdiction in which the appreciation occurred. The originating jurisdiction has, at minimum, provided the legal framework, the property protection, the dispute resolution infrastructure, and the supporting institutions that allowed the appreciation to occur. When the individual relocates and subsequently realises the appreciation in another jurisdiction, the originating jurisdiction loses the tax revenue that the realisation would have produced under its rules.

The proposition has competing considerations. Free movement of persons is a principle that several legal frameworks protect, including the European Union's freedom of establishment provisions. An exit tax that applies a higher tax rate or imposes earlier liability on departing individuals than would apply to staying individuals can be challenged as a barrier to free movement. The European Court of Justice has, in a series of cases beginning with the de Lasteyrie du Saillant decision of 2004, refined the conditions under which exit taxes are compatible with European freedom of establishment.

The legal architecture that has emerged from these cases generally permits exit tax in principle but imposes procedural requirements that mitigate its effects. The principal mitigation is automatic deferral: the tax is calculated at departure but is not collected until the individual realises the gain or until certain triggering events occur. The deferral may be conditional on guarantees in some cases, but the general principle is that the tax should not produce an immediate cash outflow at the moment of departure.

France: Article 167 bis CGI

The French exit tax is provided by Article 167 bis of the Code général des impôts. The provision applies to individuals who depart France while holding direct or indirect participations in companies exceeding fifty percent of the company's profit rights, or while holding a securities portfolio with an aggregate value exceeding eight hundred thousand euros.

The tax base is the unrealised gain on the qualifying participations and securities at the date of departure. The tax rate is the prevailing rate of imposition for capital gains in France, currently the prelevement forfaitaire unique of thirty percent for most individuals or the option to elect the bareme progressif if more advantageous.

The deferral provisions are central to the French regime. For departures to other EU/EEA Member States, the deferral is automatic, without guarantees required. For departures to other jurisdictions with which France has a tax treaty and a mutual administrative assistance convention, the deferral is also automatic. For departures to other jurisdictions, the deferral may require the provision of guarantees.

The deferral terminates and the tax becomes payable upon the realisation of the qualifying gain by sale or otherwise. After two years of non-residence (extended to five years for participations exceeding fifty percent), an automatic discharge applies if the individual has not realised the gain. The discharge has the effect of cancelling the deferred tax obligation entirely, with the consequence that an individual who maintains non-residence for the relevant period and who does not realise the gain in that period escapes the exit tax.

The interaction with the bilateral tax treaty network is significant. The Convention France-UAE of July 19, 1989, contains provisions that allocate taxing rights on capital gains, and the application of these provisions to French exit tax has been the subject of administrative interpretation. The principal point is that the exit tax is calculated under French rules and applies before the relocation; the bilateral treaty allocates taxing rights on subsequent realisations.

Germany: Section 6 of the Außensteuergesetz

The German exit tax is provided by Section 6 of the Außensteuergesetz. The provision applies to individuals who depart Germany while holding direct or indirect participations of one percent or more in corporations. The threshold is materially lower than the French threshold, with the consequence that the German regime captures a broader range of departing individuals.

The tax base is the unrealised gain on the qualifying participations at the date of departure. The tax rate is the prevailing German capital gains rate, with the specific rate depending on the form of holding and the taxpayer's overall position.

The post-2022 reform of the German exit tax tightened the deferral provisions. Pre-2022, departures to EU/EEA Member States qualified for permanent deferral without guarantees, with the obligation cancelled on subsequent realisation only if the realisation occurred while the individual remained in the EU/EEA. The 2022 reform changed the deferral to a payment-by-instalments mechanism, with the tax payable in seven equal annual instalments regardless of whether the gain has been realised. The change was significant: the German exit tax is now, in effect, a tax that is collected at departure rather than deferred until realisation.

The 2022 reform was controversial and has been challenged on European law grounds. The compatibility of the new mechanism with EU freedom of establishment is being litigated, with the proceedings expected to reach the European Court of Justice. As of the date of this article, the new regime is in force and has been applied in practice, but the longer-term legal status remains uncertain.

For departures to non-EU/EEA jurisdictions, the German exit tax has historically required immediate payment. The post-2022 reform did not materially affect departures to non-EU/EEA jurisdictions, which remain subject to immediate payment unless specific deferral arrangements are negotiated.

The Netherlands: the protective tax assessment

The Dutch exit tax operates through a different mechanism from the French and German regimes. Rather than a direct tax at the moment of departure, the Netherlands imposes a protective tax assessment for substantial shareholders — individuals holding five percent or more of a company — at the moment of emigration. The assessment is for the unrealised gain at the date of departure and bears interest from that date.

The protective assessment is not collected at departure. It is held in a state of suspension, with the tax becoming due if certain events occur. The triggering events include realisation of the gain, dissolution or liquidation of the company, distribution of dividends in certain circumstances, and — in some cases — the lapse of certain time periods.

The deferral is generally automatic for departures to EU/EEA jurisdictions and may be conditional for other destinations. The Netherlands has bilateral tax treaties with most major jurisdictions that affect the operation of the protective assessment in practice.

The discharge mechanism in the Dutch regime is less generous than in the French regime. The protective assessment generally remains in force as long as the qualifying participation is held, with discharge occurring only if specific conditions are met. The Dutch regime is therefore, in effect, a deferred but not extinguished obligation.

Spain: the exit tax for substantial shareholders

The Spanish exit tax was introduced in 2015 and applies to individuals who depart Spain while holding direct or indirect participations exceeding twenty-five percent of any company or aggregate participations exceeding four million euros across multiple companies. The threshold is structured to capture significant shareholdings while exempting smaller positions.

The tax base is the unrealised gain on the qualifying participations at the date of departure. The tax rate is the prevailing Spanish capital gains rate, currently a progressive schedule with rates ranging from nineteen to twenty-three percent for most individuals.

The deferral provisions in the Spanish regime distinguish between EU/EEA destinations and other destinations. For EU/EEA departures, automatic deferral applies without guarantees. For other destinations, deferral may be available but may require guarantees and is subject to triggering events that include subsequent realisation, dissolution of the company, and other specified circumstances.

The discharge in the Spanish regime occurs after five years of non-residence if the qualifying participations have not been disposed of in that period. The discharge cancels the deferred tax obligation, providing an exit path for individuals who maintain non-residence for the relevant period without realisation.

The interaction with the Spanish wealth tax regime is significant. An individual who is held to be Spanish tax resident is subject to wealth tax on worldwide assets, in addition to income tax. The exit tax operates against the income tax base; the wealth tax operates separately. A failed non-residence claim can therefore produce both income tax and wealth tax exposure that exceeds the exit tax obligation.

The United Kingdom: temporary non-residence rules

The United Kingdom does not impose an exit tax in the conventional sense. Capital gains realised by UK residents are subject to capital gains tax; capital gains realised by non-residents are generally not subject to UK tax (with limited exceptions for UK real estate and certain other categories).

The UK does, however, impose temporary non-residence rules that operate as a partial substitute for exit tax in certain circumstances. The rules apply to individuals who become non-resident for a period of less than five years and who realise certain categories of gain during that period. The gains are taxed in the UK upon return, as if they had been realised during a period of UK residence.

The temporary non-residence rules are more limited than the exit tax regimes of the other jurisdictions described in this article. They do not capture all categories of gain and do not apply to individuals who maintain non-residence for the full five-year period. Their effect is to discourage short-period departures motivated by realisation of specific gains rather than to capture all unrealised appreciation at departure.

The UK regime does have other features that operate in this domain, including the deemed disposal of certain assets at the moment an individual ceases to be UK resident, and the post-2024 reforms to the non-domiciled regime that have changed the position of certain UK-resident-but-non-domiciled individuals. The reforms are still being absorbed into practice and may produce additional considerations as their effects become clearer.

The United States: the expatriation tax under Section 877A

The United States operates an expatriation tax that applies to certain US citizens who renounce citizenship and to certain long-term US residents who terminate their US tax residency. The provision is contained in Section 877A of the Internal Revenue Code and was introduced in 2008 as part of the HEROES Act.

The covered expatriate concept is central to the US regime. An individual who renounces US citizenship or terminates long-term residency is a covered expatriate if their net worth exceeds two million US dollars at the time of expatriation, if their average annual income tax liability for the five preceding years exceeds a threshold (adjusted annually), or if they have not certified compliance with US tax obligations for the five preceding years. Most high-net-worth expatriates fall within the covered expatriate category.

The expatriation tax is structured as a deemed sale of all assets at the moment of expatriation, with the deemed sale producing a capital gain that is taxed at the prevailing US capital gains rate. The tax has an exemption that increases annually for inflation, currently in the range of eight hundred thousand US dollars. Gains in excess of the exemption are subject to the full capital gains tax, with no general deferral.

The US regime is materially harsher than the European regimes in two respects. First, the deemed sale captures all asset categories rather than only substantial shareholdings. Second, the tax is collected at expatriation rather than deferred until realisation. Specific deferral provisions exist for certain asset categories, including specified retirement accounts and certain trust interests, but these are exceptions to the general rule.

The US regime also imposes additional provisions on covered expatriates that operate beyond the expatriation tax itself. These include the imposition of US tax on certain gifts and bequests received by covered expatriates from US persons, and ongoing compliance obligations that extend beyond the expatriation event.

The patterns and the divergences

The comparative reading produces several patterns. First, all six jurisdictions impose some form of exit-related tax provision. The provisions vary in scope and mechanism but address the common concern that departing individuals should not escape tax on unrealised appreciation that arose during the period of residence.

Second, the European regimes have converged on a deferral architecture that mitigates the immediate cash impact of exit tax. The French, Spanish, and Dutch regimes provide deferral that may extend until realisation, with eventual discharge in some cases. The German regime, post-2022, has moved away from this architecture and now requires payment in instalments regardless of realisation.

Third, the US regime is substantially harsher than the European regimes. The deemed sale at expatriation, the immediate collection without general deferral, and the broad scope of asset categories captured all combine to produce a tax that operates at expatriation rather than at realisation. The US regime is also unique in applying to citizenship renunciation as well as to residency termination.

Fourth, the UK regime is the lightest of the six. The absence of a conventional exit tax, the limited scope of the temporary non-residence rules, and the relatively narrow circumstances in which deemed disposals apply produce a regime that is materially less burdensome than the others. The post-2024 non-domiciled reforms have changed parts of this picture but have not introduced a conventional exit tax.

Fifth, the interaction of exit tax with the bilateral tax treaty network is complex. The exit tax is generally calculated under originating-jurisdiction rules and applies before the residency change. Bilateral treaties allocate taxing rights on subsequent realisations. The two operate in sequence rather than in parallel, with the consequence that careful timing and structuring can mitigate the combined effect.

The advisory considerations

The advisory function on exit tax has several distinct elements. The first is the planning of the timing of departure relative to anticipated realisations. An individual who departs before realising significant gains may be able to avoid exit tax exposure on those gains, particularly in regimes with discharge provisions. The discharge provisions in the French and Spanish regimes are particularly significant in this context.

The second is the structuring of the asset position before departure. Asset categories captured by exit tax differ across regimes, and the conversion of one asset class to another can affect exit tax exposure. The conversion must, however, be substantive rather than formal; tax authorities scrutinise pre-departure transactions for indications of avoidance.

The third is the management of the deferral position post-departure. In regimes with deferral, the maintenance of conditions that preserve deferral is itself a planning consideration. Triggering events that terminate deferral — sale, distribution, dissolution — must be anticipated and avoided where possible during the deferral period.

The fourth is the documentation and procedural compliance. Each regime imposes specific procedural requirements at the moment of departure: declarations, valuations, requests for deferral, posting of guarantees in some cases. Failure to comply with the procedural requirements can produce loss of deferral and immediate tax payment, even where the substantive position would have permitted deferral.

The fifth is the long-term monitoring of the deferral position. In regimes where the deferral persists for years, the maintenance of records and the ongoing engagement with the originating tax authority continue throughout the deferral period. The administrative burden is non-trivial and must be planned for.

The trajectory through the second half of the 2020s

The trajectory of exit tax provisions through the second half of the 2020s is one of continued convergence around substance and continued divergence in mechanism. The European regimes will continue to operate within the framework established by European Court of Justice case law, with deferral and discharge provisions that mitigate the immediate impact while preserving the originating jurisdiction's capacity to tax accumulated appreciation. The German regime's post-2022 architecture may be modified following the pending European litigation.

The US regime is unlikely to change materially. The expatriation tax has been a stable feature of US tax law for nearly two decades, and there is no significant policy momentum toward reform.

The UK regime may evolve as the post-2024 non-domiciled reforms are absorbed into practice. The reforms have changed the position of certain UK-resident individuals and may produce additional considerations that practitioners will need to address.

The cumulative effect is that exit tax planning will remain a significant component of cross-border individual mobility advisory practice. The variation across regimes ensures that no single approach will be optimal for all individuals; the analysis must be jurisdiction-specific and case-specific. The practitioner who works in this domain must maintain familiarity with each of the principal regimes and must update that familiarity as the regimes evolve.