Pension and Social Security Treatment Under the US

Pension and social security income presents a particular coordination challenge for US–France cross-border taxation. Both countries have mandatory social insurance systems with associated retirement benefits. Both assert taxing rights over pension distributions. Without treaty allocation, the same payment could be taxed by both countries.

Article 18 of the US–France treaty establishes the allocation rule: pension distributions and social security payments are taxable only in the paying state. This is source-state exclusive taxation, the same principle that applies to interest income under Article 11. The residence state yields its taxing rights.

For US citizens, the saving clause normally overrides treaty benefits. Article 18(1) is a specific exception to the saving clause, making it one of the treaty’s most valuable provisions for Americans resident in France.

Article 18(1): The Source-State Exclusivity Rule

Pension Distributions

Pension distributions and similar remuneration arising in a contracting state in consideration of past employment, paid to a resident of the other contracting state, are taxable only in the first-mentioned state (the source state). This applies to both periodic distributions and lump-sum payments.

A pension distribution is deemed to arise in the state where the pension or retirement arrangement is established. A distribution from a US 401(k) or IRA arises in the US. A distribution from a French employer pension (AGIRC-ARRCO) or French government pension arises in France.

Practical result:

A French resident receiving distributions from a US 401(k) owes US tax on those distributions, not French income tax
A US resident receiving distributions from a French pension arrangement owes French tax, not US income tax

Payments under the social security legislation of a contracting state to a resident of the other contracting state are also taxable only in the source state.

Payment	Taxable In
US Social Security to a French resident	United States only
French social security (CNAV, AGIRC-ARRCO) to a US resident	France only
French social security to a US-citizen French resident	France only

The 2009 Protocol Clarification for US Citizens

Prior to the 2009 Protocol, a textual ambiguity existed: the saving clause could arguably allow the US to also tax French social security payments received by US citizens who are French residents, because those individuals are citizens (not merely residents) of the US.

The 2009 Protocol resolved this ambiguity by amending Article 18(1) to explicitly state that French social security payments to a resident of France who is a US citizen are taxable only in France. This clarification is one of the few treaty provisions that explicitly carves out US citizenship-based taxation for a specific income type. It is listed in Article 29(3)(a) as an exception to the saving clause available to all US citizens.

A US citizen living in France who receives French mandatory retirement payments (CNAV, AGIRC-ARRCO, or other French social security regime payments) owes no US tax on those amounts.

Article 18(2): Cross-Border Pension Contribution Deductibility

What the Provision Does

The 2004 Protocol introduced Article 18(2), a significant provision addressing the situation of an individual who maintains a pension arrangement in their home state while working in a host state. It allows contributions to a home-state plan to be treated as deductible in the host state, as if made to a recognized host-state plan.

For employed individuals, employer contributions and accruing benefits in the home-state plan are excluded from the employee’s taxable income in the host state, and the employer may deduct its contributions in computing host-state business profits.

This provision addresses a common situation: a US citizen who was contributing to a 401(k) before moving to France wishes to continue contributing to that plan while employed in France. Without Article 18(2), French tax law would not recognize the 401(k) contribution deduction because French law does not grant deductions for contributions to foreign retirement plans.

Conditions

Continuity requirement: Contributions must have been made to the plan (or a predecessor plan) before the individual began working in the host state. A US citizen who moves to France and begins contributing to a 401(k) for the first time after arrival cannot claim French deductibility under Article 18(2).

Host-state competent authority agreement: The host-state competent authority must agree that the plan “generally corresponds” to a recognized host-state plan. The treaty short-circuits this requirement by auto-recognizing certain common plans.

Monetary limits: Deductibility is subject to the monetary limits of the host state’s law, not the home state’s limits.

Auto-Recognized US Plans for French Tax Purposes

The following US retirement plans are automatically recognized as generally corresponding to French retirement arrangements for purposes of Article 18(2):

Qualified plans under IRC section 401(a) (including 401(k) plans)
Individual Retirement Accounts (IRAs) under section 408
SEP IRAs under section 408(k)
SIMPLE IRAs under section 408(p)
Qualified annuity plans under section 403(a)
Section 403(b) plans
Roth IRAs under section 408A
US Social Security

Auto-Recognized French Plans for US Tax Purposes

French pension arrangements organized under French social security legislation are automatically considered to correspond to US-recognized retirement arrangements for purposes of US tax treatment.

Government Pensions: Article 19

Government pensions are governed by Article 18 as amended by the 2004 Protocol. The prior Art. 19(2) pension provision was deleted by the 2004 Protocol. Remuneration paid by a government for past government service is now treated as a pension under Article 18 and is subject to source-state exclusive taxation.

The nationality exception applies: if the recipient is a resident and national of the residence state but not a national of the paying state, pension income may be taxable in the residence state rather than the source state. This is a limited exception for dual nationals and permanent residents.

The 2009 Protocol added Article 29(9), providing that French government pay (not pensions, but active service remuneration) to US citizens or green card holders for services performed in the US is taxable only in the US.

French social charges (CSG, CRDS, prélèvement de solidarité) may apply to pension income received by French residents. Social charges are not covered taxes under Article 2 of the treaty. The treaty does not govern their application.

French residents receiving pensions from French sources are generally subject to reduced-rate social charges on pension income compared to the rate applicable to investment income. US residents receiving French pensions owe no French social charges on those payments because they are not French residents.

The totalization agreement does not directly address social charges on pension income. See US–France Totalization Agreement for the scope of the agreement.

Protocol History

Article 18 was completely rewritten by the 2004 Protocol. The original 1994 treaty contained different allocation rules for pensions and had not introduced cross-border pension contribution deductibility. The 2004 Protocol brought the pension provisions into alignment with modern US treaty policy, which favors source-state exclusive taxation of pension distributions and portability of pension rights for mobile workers.

The 2009 Protocol amended Article 18(1) specifically to add the explicit statement that French social security payments to US-citizen French residents are taxable only in France. The Technical Explanation for the 2009 Protocol addresses this change and confirms that the provision is an exception to the saving clause available to all US citizens under Article 29(3)(a).

Article 18(2)(b) lists the auto-recognized plans and the conditions. The “generally corresponds” standard requires that the plan be a pension or retirement plan, not merely a savings plan. A standard taxable brokerage account does not qualify under this provision.

Form 8833 is required to claim benefits under Article 18(2) when taking that position on a US return. The claim must identify the treaty provision, the plan, and the amounts contributed.

Frequently Asked Questions

No. Under Article 18(1) as clarified by the 2009 Protocol, French social security payments to a US-citizen French resident are taxable only in France. This is an explicit exception to the saving clause under Article 29(3)(a). A US citizen in France receiving French mandatory retirement payments does not owe US tax on those amounts.

No. Article 18(1) provides that payments under the social security legislation of a contracting state to a resident of the other state are taxable only in the paying state. US Social Security received by a French resident is taxable only in the US.

Can a US citizen deduct contributions to a US 401(k) or IRA for French tax purposes?

Generally yes, if contributions were made before the individual arrived in France. Article 18(2), introduced by the 2004 Protocol, allows cross-border pension contribution deductibility when the individual was already contributing to the home-state plan before beginning work in the host state. 401(k) plans, IRAs, SEP IRAs, and 403(b) plans are among the auto-recognized US plans.

What is the continuity requirement for cross-border pension deductibility?

The individual must have been contributing to the plan before beginning work in the host state. A US citizen who moves to France and enrolls in a new US plan after arriving cannot claim French deductibility of those contributions under Article 18(2). The continuity requirement is frequently overlooked and limits the provision’s practical scope.

Are French private pensions taxable only in France for a US resident?

Yes, under Article 18(1). Pension distributions paid by a pension arrangement established in France to a resident of the US are taxable only in France. The saving clause exception in Article 29(3)(a) preserves this treatment for US citizens as well.

No. French social charges are not covered taxes under Article 2 of the treaty. Their application to pension income received in France is a matter of French domestic law, not the treaty. The totalization agreement, a separate instrument, may be relevant to contribution obligations on certain types of income.