The France-Belgium tax treaty: who taxes what, and how to use it
A new treaty was signed on 9 November 2021 but is NOT yet in force (Belgian ratification pending as of May 2026): stress-test current structures against the future text now.
The 60-second essentials
- Your securities gains can be purged almost tax-free before any move to France: on €160,000 of latent gains, about €50,240 is at stake (2026 French flat tax: 31.4%).
- Your French rents and property gains stay taxed in France throughout non-residence: 7.5% solidarity levy if you are affiliated to the local social security system.
- This treaty also covers inheritance: a rare privilege (about thirty conventions in the whole French network).
- France’s inbound regime (art. 155 B) can exempt part of your pay for up to 8 years, provided the contract is signed BEFORE you move.
- Treaty-specific caution: A new treaty was signed on 9 November 2021 but is NOT yet in force (Belgian ratification pending as of May 2026): stress-test current structures against the future text now.
Tax residence: the Belgium-France match
Everything starts here: no treaty benefit exists for someone who remains French tax-resident. France’s art. 4 B casts three independent nets (home, main activity, centre of economic interests) and one is enough. If both States claim you, the treaty cascade decides: permanent home, centre of vital interests, habitual abode, nationality, in that strict order. The evidence file is built during the expatriation, never after.
Who taxes what, income by income
Near-universal standard: income from immovable property is taxable where the property sits. Your French rents and property gains remain taxed in France whatever your residence.
As a non-resident you file in France every year. Tax is computed at the 20% minimum rate (30% above a threshold) unless the average-rate option is better, which it often is. Social levies: 7.5%. Affiliated locally, you qualify for the reduced 7.5%; if the full rate was applied, the overpayment can be claimed back for non-time-barred years.
On €16,800 of yearly unfurnished rent, the spread between 17.2% and 7.5% is €1,630 per year, recoverable.
OECD-model principle: salaries are taxable where the work is physically performed, with a framed exception for short assignments (the 183-day rule, exact conditions in the text).
Working in Belgium, your pay follows local law during non-residence. Hybrid patterns reawaken French tax: days worked in France, remote work from France for a local employer, or pay delivered by a French entity.
Shared taxation: the residence State taxes, and the source State may withhold up to a treaty cap. The exact cap is read in the official text linked above.
On the French side, the domestic withHolding on dividends paid to a non-resident individual is 12.8%, adjusted to the treaty cap where lower. Forms 5000/5001 secure the treaty rate at source; without them you pay the domestic rate and wait months for refunds.
We never publish an unverified treaty rate: the exact cap for this treaty is pinned on the official text during missions.
Same sharing logic as dividends, with an eventual source withHolding capped by the text.
A favourable French quirk: France generally does not withhold on interest paid to non-residents (except non-cooperative jurisdictions, 75%). Treatment therefore mostly depends on local law and on your French filing after the move.
Classic architecture: private pensions are generally taxable in the State of residence; government pensions in the paying State; social security pensions follow the text’s own rule.
Retired in Belgium: each pension’s nature (private, government, social security) decides which State taxes it. A misqualified pension means double taxation or reassessment.
General treaty rule: gains on securities are taxable in the seller’s State of residence. Classic exceptions to pin on the text: substantial participations and real-estate-rich companies.
Local law does not tax private gains: the non-residence window allows a near-total purge. Sell (even rebuy immediately) before the move: a new cost basis is set and only post-move gains will ever face French tax. Execute before the residence transfer, never after.
On €160,000 of latent gains purged before the move: about €50,240 of French flat tax neutralised.
On the French side, non-residents face IFI only on French real estate, above €1.3M of net taxable property wealth (French rule, 2026).
Few treaties cover wealth tax: absent an express clause to pin on the text, the French rule above stands. After a move to France, foreign property enters the IFI base, with a partial 5-year relief for new arrivals.
Income-tax treaties and inheritance treaties are separate texts: coverage of one never implies the other.
A rare privilege: this treaty has treaty inheritance coverage. Used upstream (structuring, lifetime gifts), it can keep non-French assets out of French inheritance duties despite France-resident heirs. One of the strongest planning levers in the network.
The local tax system, in brief
A complete European system. EU/EEA membership changes two very concrete things: French social levies on your French property income drop to 7.5% if you are affiliated locally, and EU directives frame intra-EU withHolding. Mobility makes de facto double residence the rule, and it is the first thing the French administration checks.
Known convention specifics
- Private gains under normal management are untaxed in Belgium: a real purge window today
- Separate 1959 inheritance treaty, unaffected by the renegotiation
- The 2021 text notably changes substantial-participation gains: shareholders are first in line
Three worked examples (2026 French rules)
Case 1, the purge. €160,000 of latent gains. Sold (and rebought) before the move: taxed nowhere, new cost basis set. Sold six months after the move: €50,240 of French flat tax. Same trade; the date is worth €50,240.
Case 2, French rent. €16,800 of unfurnished French rent: affiliated locally you owe 7.5%, not 17.2%, in social levies: if wrongly charged, €1,630 per year is refundable on claim.
Case 3, moving to France with art. 155 B. Hired into France at €120,000 gross with the contract signed before the move: a 30% impatriation premium (€36,000) is income-tax exempt, worth about €10,800 per year at a 30% marginal rate, renewable up to 8 years. The same contract signed one week after the move: zero.
These are examples; yours has its own amounts and dates. The free assessment runs the 47-point checklist on your Belgium-France situation in 3 minutes. Calculate my situation →
The treaty’s classic traps
1. Purging too late. Selling ’on arrival’ instead of before leaving Belgium: historical gains become French-taxable at 31.4%. The window closes on the day residence transfers.
2. Signing the contract after the move. France’s inbound regime (art. 155 B) requires recruitment from abroad: a contract signed once back closes up to 8 years of exemptions. No cure.
3. Paying 17.2% by default. Affiliated locally you owe 7.5% on French property income: unclaimed, the overpayment (€1,630/year here) dies with the statute of limitations.
4. Ignoring the inheritance coverage. This treaty has rare treaty inheritance coverage: not using it in your estate structuring wastes a major lever.
FAQ
Is the 1964 treaty still in force in 2026? Yes, subject to the caution flagged above. Recent changes come mostly from French domestic law (31.4% flat tax and higher social levies in 2026, IFI unchanged at €1.3M): what moves is the treaty/domestic-law interface.
How do I prove tax residence in Belgium? Through real life, not paperwork alone: a permanent home, actual presence, schooling, accounts and activity on the spot, plus the local tax-residence certificate. The evidence file is built during the expatriation; it is nearly impossible to reconstruct afterwards.
Do I still file in France while abroad? Yes, as long as any French-source income remains: rents, dividends, property gains. The non-resident return stays annual, at the 20/30% minimum unless you opt for the average rate.
Will my heirs in France be taxed on my foreign assets? This treaty’s inheritance treaty allocates taxing rights between the two States: structured upstream, it can shield non-French assets.
The summary table
| Income / event | While non-resident | After moving to France |
|---|---|---|
| French rent | France: 20/30% min. + 7.5% levies | Ordinary French scale |
| French property gain | France: 19% + levies, 22/30-year taper | Ordinary French regime |
| French dividends | French withHolding 12.8%, treaty cap where lower | 31.4% flat tax or scale |
| Securities gains | €0 (no local tax, no French tax) | 31.4% on unpurged gains |
| Local salary | Taxed per the treaty (place of work) | N/A; art. 155 B if hired before the move |
| Pensions | Private / government / social security split: see text | French taxation, credit per the text |
| Inheritance | Treaty inheritance coverage | Art. 750 ter: worldwide French base |
| Wealth | IFI on French property over €1.3M | Worldwide IFI base (5-year partial relief) |
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In the same region, Western Europe
Comparing several destinations in this region? These treaties are often reviewed together:
Spain · Ireland · Italy · Luxembourg · Monaco · Netherlands · Portugal · United Kingdom
Sources: 1964 treaty (official text on Légifrance; reference list on impots.gouv.fr); French tax code arts. 4 B, 155 B, 197 A, 244 bis A, 750 ter, 784 A; 2026 Finance and Social Security Finance Acts. Treaty withHolding caps are read in the linked official text: we publish no unverified treaty rate.