The France-Switzerland tax treaty: who taxes what, and how to use it
The inheritance treaty was terminated by France at the end of 2014: since 2015, each State applies its own domestic rules to estates.
The 60-second essentials
- Your securities gains can be purged almost tax-free before any move to France: on €60,000 of latent gains, about €18,840 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.
- Inheritance coverage was terminated: heirs fall under both States’ domestic law, planning is decisive.
- 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: The inheritance treaty was terminated by France at the end of 2014: since 2015, each State applies its own domestic rules to estates.
Tax residence: the Switzerland-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 €26,400 of yearly unfurnished rent, the spread between 17.2% and 7.5% is €2,561 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 Switzerland, 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.
Treaty cap verified at 15% for individuals on this treaty (sources: BOFiP, consolidated text).
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 Switzerland: 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 €60,000 of latent gains purged before the move: about €18,840 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.
Since termination, each State applies its own law: art. 750 ter lets France tax widely (deceased’s residence, heirs’ residence 6 of the last 10 years, or asset situs). Real double taxation exists on this treaty: planning is no longer comfort, it is necessity.
Art. 784 A’s credit only covers assets located outside France: it softens, it does not erase.
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 capital gains are not taxed in Switzerland: a real pre-return window
- Cross-border workers: the 1983 agreement taxes 8 cantons’ frontaliers in their State of residence; Geneva differs
- Dividends: treaty cap verified at 15% (BOFiP)
Three worked examples (2026 French rules)
Case 1, the purge. €60,000 of latent gains. Sold (and rebought) before the move: taxed nowhere, new cost basis set. Sold six months after the move: €18,840 of French flat tax. Same trade; the date is worth €18,840.
Case 2, French rent. €26,400 of unfurnished French rent: affiliated locally you owe 7.5%, not 17.2%, in social levies: if wrongly charged, €2,561 per year is refundable on claim.
Case 3, moving to France with art. 155 B. Hired into France at €140,000 gross with the contract signed before the move: a 30% impatriation premium (€42,000) is income-tax exempt, worth about €12,600 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 Switzerland-France situation in 3 minutes. Calculate my situation →
The treaty’s classic traps
1. Purging too late. Selling ’on arrival’ instead of before leaving Switzerland: 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 (€2,561/year here) dies with the statute of limitations.
4. Believing inheritance is still covered. The inheritance treaty was terminated: plans built on it are void, and double taxation is real.
FAQ
Is the 1966 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 Switzerland? 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? Very likely, through art. 750 ter: one heir resident in France 6 of the last 10 years pulls inherited assets into the French base, with only a partial credit for foreign tax (art. 784 A).
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 | Terminated: domestic law | 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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Sources: 1966 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.