Returning to France from Belgium: deregistration, Belgian departure tax, French declaration and exit tax

Returning from Belgium requires a specific process. First, you must notify your Belgian municipality in person no later than the day before your departure. Next, you must contact Belgium, whose capital gains tax law treats transferring your residence outside the country as a sale. Finally, you must contact France: you must declare the year of your return, your foreign bank accounts, and any deferred exit tax. If you retain employment in Belgium, your cross-border worker status will also be relevant.

Step 1: Deregistration with the Belgian municipality

The Immigration Office explains that EU citizens leaving Belgium permanently must report in person to their local municipality no later than the day before their departure. Its website does not specify the date of deregistration. The National Register's information sheet on deregistration for foreigners sets this date as the same as the date of declaration for Belgian citizens and does not address EU citizens. The procedure is not available online. For departures of less than three months, no formalities are required.

Step 2: Belgian tax on capital gains from financial assets

The law was passed in plenary session on April 2, 2026, according to the Chamber of Representatives' record, which mentions publication in the Belgian Official Gazette on April 21, 2026. Article 92 § 2, 2° of the text adopted in committee equates "the transfer of domicile or the seat of assets outside Belgium" with a transfer of assets. The scope of financial assets covers financial instruments, insurance and capitalization contracts (with the exception of certain assurance-vie contracts in branch 21 without a savings or investment objective, which only provide a benefit in the event of death), crypto-assets, funds (bank money or electronic money), investment gold, and central bank digital currencies.

This page does not indicate whether a deferral exists, nor when the tax applies to departures. The Belgian Official Gazette could not be consulted. Before deregistering, have your case assessed by a Belgian professional.

Step 3: The schedule for France

The arrival date. French tax residence is determined according to three criteria outlined in the BOFiP (Official Bulletin of Public Finances): principal residence or home, principal professional activity, and center of economic interests. Only one of these criteria is required, and a presence of more than six months is not an absolute requirement. If both Belgium and France consider you a resident, the convention of March 10, 1964, clarifies this in Article 1, paragraph 2, starting with the permanent home.

The statement. According to the administration, the filing depends on your income before your return, and the return for the year of your return is filed the following year:

Health. The information sheet on service-public.gouv.fr regarding returning from the European Economic Area, the European Union, or Switzerland specifies that, if you are employed, re-affiliation with the primary health insurance fund begins from the first hour of work. If you are unemployed and without benefits, a three-month waiting period precedes the commencement of benefits. France Diplomatie presents Belgium as a member of the European Union.

Belgian accounts and contracts: declaring accounts held abroad

The information sheet on service-public.gouv.fr refers to the declaration of accounts opened, used, or closed abroad. It stipulates a fine of €1,500 per undeclared account. The same sheet specifies a fine of €10,000 per account located in a country that has not signed a tax treaty with France to combat tax fraud and evasion; it does not specify which category a Belgian account falls into. Check this point before filing. For assurance-vie policies, see our page on declaring assurance-vie policies taken out abroad.

Exit tax on hold: what the return changes

If you left France with a deferred exit tax payment, the instructions for form 2074-ETD include "re-establishing your tax residence in France" among the events eligible for tax relief or a refund, provided you still hold the relevant securities. The 2074-ETS3 follow-up form includes section 440, "Return to France." Line 441 requests the return date. Line 442 concerns capital gains subject to deferred taxation prior to the transfer, the securities of which are still in your assets upon your return; these should be entered on line 8UT of form 2042. Lines 443 to 455 calculate the social security contributions and income tax to be relieved (capital gains and receivables benefiting from the deferral of payment) or refunded (those not benefiting), according to a rate that the form refers to in the instructions. Have the calculation for your specific case confirmed by the tax authorities.

Expatriates: a system for those coming from afar

The expatriate tax regime under Article 155 B applies to individuals who were tax residents outside France for the five calendar years preceding their appointment. According to the tax authorities, it concerns employees called in from abroad or recruited abroad, and certain executives treated as employees; those who come of their own accord are not eligible. It runs until December 31st of the eighth calendar year following the appointment. It includes exemption from the expatriation bonus or a flat-rate allowance of 30%, an exemption of 50% on income from foreign-sourced movable capital (the payer must be established outside France, in a country with which France has a treaty containing a clause on administrative assistance), and a limitation of the French wealth tax (IFI) to real estate assets and rights located in France until December 31st of the fifth year. Two limits apply: the total cannot exceed 50% of the total remuneration, and the exemption related to work performed abroad cannot exceed 20% of the net taxable remuneration after deducting the expatriation bonus. The application is made using form 2042 or 2042 C.

Keeping a job in Belgium: cross-border workers

The government's page on cross-border workers describes a 20-kilometer zone from the border. New cross-border workers since January 1, 2012, do not have this status and are taxed in Belgium. Only those who held this status before January 1, 2012, can retain it and continue paying their taxes in France until 2033, under three conditions: maintaining their permanent residence continuously in the French border zone, carrying out their work in the Belgian border zone, and not leaving the border zone for more than 30 days per calendar year for this work.

For private pensions, Article 12 of the 1964 convention makes them taxable in the country of residence. Our page on the France-Belgium convention details the articles that concern salaries and pensions.

Return on September 1st, 2027 with €900,000 in capital gains on hold: a numerical example (fictitious profile)

Situation. A fictitious former executive left France for Belgium in 2025 with a deferred exit tax on €900,000 of unrealized capital gains. He returned to France on September 1, 2027, and still holds his shares. He continues to receive rental income from French sources.

Issue. He wants to know what is at stake and how his comeback year statement is structured.

Strategy. He applies the rates from form 2074-ETD for a departure in 2025, 12.8 % and 17.2 %, to the €900,000. He divides the year 2027 by the date of his return.

Result. Income tax: €115,200. Social security contributions: €154,800. Total: €270,000. This is the amount obtained with these rates, based on the example: the return of securities held falls under the category of tax relief or refund events, and section 440 of form 2074-ETS3 refers to the instructions for the applicable rate. For tax purposes, the period from January 1st to August 31st represents 243 days, to be reported on form 2042-NR for French rental income; the period from September 1st to December 31st represents 122 days, to be reported on form 2042. The profile and amounts are fictitious.

What changes depending on your situation

• The nature of your financial assets at the time of deregistration: instruments, insurance, crypto-assets.
• The exact date of your return and your French-source income before that date.
• Whether or not you keep a job in Belgium, and the area where you work.
• The existence of a deferred exit tax and the holding of securities upon return.
• A list of your accounts and contracts opened in Belgium.

The rule depends on your situation. No results are guaranteed.