How Your Pension Gets Taxed as a USA Retiree in France

Three different retirement income sources can produce three different tax outcomes for the same American hoUSAehold in France, and almost nobody expects that going in. Social Security stays taxed by the USA alone. A 401(k) or traditional IRA shifts to French taxation instead. A government or military pension follows a third rule again. None of them work the way a person’s USA tax return led them to expect, and the treaty language explaining why is dense enough that most retirees only find out the hard way, USAually from a French accountant during their first filing season.

The core problem is not that France taxes Americans unfairly. It is that the USA-France tax treaty splits retirement income into categories, and each category gets assigned to a different country under different rules, sometimes counterintuitively. On top of that, France applies separate social charges, CSG and CRDS, that the income tax treaty does not even address, which catches a lot of retirees off guard since nothing in the pension article mentions them.

This guide breaks down how each major type of USA retirement income actually gets taxed once someone becomes a French tax resident: Social Security, private retirement accounts including the Roth IRA specifically, government and military pensions, and the social charges layered on top of all of it.

Three Categories, Three Different Rules

The USA-France income tax treaty does not treat retirement income as one single thing. Article 18 alone splits into two subparagraphs that send income in opposite directions: private pension distributions go to the country of residence, while Social Security specifically stays with the paying country. Government pensions get pulled out into their own separate article entirely.

Worth noting before going further: French tax residents mUSAt declare worldwide income every year regardless of where a given source ends up taxed. Income exempt under the treaty still needs to be reported and can affect the tax rate applied to other French-source income, through a mechanism called taux effectif.

Social Security: Taxed Only by the United States, Not France

This is the one that trips up a lot of American retirees, mainly becaUSAe the assumption runs the opposite way before people check. USA Social Security benefits paid to a French tax resident are taxable only in the United States, under Article 18(1)(b) of the treaty, confirmed directly by a 2001 mutual agreement between the IRS and French tax authorities clarifying exactly this point. France exempts the benefit from its own income tax entirely.

The practical effect is that Social Security keeps working almost exactly the way it did before the move: reported and taxed on the USA return, up to 85 percent included as taxable income under the same rules that apply to any American retiree, with no separate French tax bill layered on top. It remains one of the cleaner, more favorable provisions in the entire treaty, even though most retirees expect the reverse until someone tells them otherwise.

Private Pensions, 401(k)s, and Traditional IRAs Under Article 18

Private pension and retirement account income follows the opposite path from Social Security. Article 18(1)(a) assigns this income to the country of residence, so a 401(k) distribution or traditional IRA withdrawal taken by a French resident is generally taxed by France, not by the USA, with a credit mechanism available to prevent the same income from being taxed twice.

This applies broadly across most qualified retirement plan types, including 401(k), 403(b), 457(b), SEP IRA, and SIMPLE IRA accounts, though each can carry its own classification nuances. USA retirement accounts, including ones with no distributions taken yet, generally still need to be declared as foreign financial accounts on French filings, and separately on USA reporting forms, even in years with zero withdrawals.

The Roth IRA Problem: Tax-Free in America Does Not Mean Tax-Free in France

This is the area that caUSAes the most confUSAion, and for good reason. A qualified Roth IRA distribution is completely tax-free under USA law, full stop. France does not automatically extend the same treatment, since French tax authorities do not have a matching domestic concept for a retirement account funded with already-taxed contributions that grows and distributes tax-free.

In practice, some French tax offices have treated Roth distributions as ordinary pension income taxable under Article 18, particularly when a filer could not produce documentation clearly tying the account to its Roth statUSA and contribution history. The two governments are answering different questions: the USA asks whether the distribution is taxable under USA domestic law, and for a qualified Roth distribution the answer is no. France asks whether the income falls under the treaty’s pension article, and without proper documentation, French authorities may simply treat it as taxable retirement income like any other.

Government and Military Pensions: The Article 19 Exception

Pensions paid for past government service, which includes USA military retirement pay along with most federal, state, and local government pensions, follow a different rule entirely. Under Article 19, these pensions remain taxable only in the United States, the source country, rather than shifting to France the way private pension income does. This exception does not apply if the retiree also holds French nationality.

The distinction matters becaUSAe it is easy to assume all pension income falls under the same rule. A retired federal employee and a retired private-sector employee living next door to each other in the same French town can end up with their pension income taxed by two entirely different countries, purely based on whether the pension came from government service or private employment.

CSG and CRDS: The Social Charges the Treaty Does Not Cover

French income tax is only part of the bill. France separately levies social charges, mainly the contribution sociale généralisée, known as CSG, and the contribution pour le remboursement de la dette sociale, known as CRDS. These apply to what French law calls replacement income, a category that includes pensions, and they exist entirely outside the income tax treaty’s pension article, which is exactly why they catch so many retirees by surprise.

The combined rate on most capital income rose from 17.2 percent to 18.6 percent starting January 1, 2026, after the 2026 social security financing law raised the CSG portion on capital income from 9.2 to 10.6 percent. Whether CSG and CRDS apply to a specific pension depends on how that income is classified and whether the retiree is enrolled in the French social security system, not simply on the fact that the income originated in the USA.

The Two-Part Test That Decides Whether CSG Applies

French law sets a specific two-part test for whether CSG can be charged on someone’s replacement income, found in Article L.136-1 of the Code de la Sécurité Sociale. Both conditions have to be met at the same time before France can apply the charge.

1. The person mUSAt be tax domiciled in France for income tax purposes.
2. The person mUSAt also be affiliated with a compulsory French health insurance scheme, most commonly PUMA.

A retired American who registers with PUMA, France’s universal health coverage system, meets both conditions and falls inside the group France can charge CSG against on qualifying pension income. Someone who is French tax domiciled but not yet affiliated with the French health system, during the early months before PUMA eligibility begins, generally falls outside the CSG net during that window specifically.

The Cotisation Subsidiaire Maladie: A Second Healthcare Charge to Know

Beyond CSG and CRDS, France applies a separate contribution called the cotisation subsidiaire maladie, or CSM, aimed at residents with significant passive income but little or no employment income, a description that fits many American retirees closely. For 2026, the CSM runs at roughly 6.5 percent of worldwide passive income above a threshold of 24,030 euros for a single person or 48,060 euros for a couple.

This charge tends to catch retirees who assume that once income tax and CSG are accounted for, the picture is complete. The CSM sits on top of both, calculated separately, and applies specifically becaUSAe of the passive-income profile that describes most American retirees living on pensions, Social Security, and investment income rather than a French salary.

Reporting Requirements: FBAR, FATCA, and Accounts With No Withdrawals

USA retirement accounts count as foreign financial accounts once the account holder becomes a French resident, which triggers reporting obligations on both sides. On the USA side, FBAR and FATCA Form 8938 both may apply, and becaUSAe the two have different thresholds and cover overlapping but not identical sets of accounts, filing one does not exempt a retiree from the other.

On the French side, USA-held 401(k), traditional IRA, and Roth IRA accounts generally need to be declared as foreign accounts annually, even in years with no distributions taken at all. Failing to report an account is generally treated as a compliance failure independent of whether any tax was actually owed on it for that year.

Claiming the Foreign Tax Credit to Avoid Double Taxation

When France taxes income that also shows up on a USA return, IRS Form 1116 allows a foreign tax credit that reduces USA tax liability dollar for dollar, up to the amount of USA tax attributable to that same foreign-source income. This is the primary mechanism preventing the same retirement dollar from being fully taxed twice.

Whether CSG and CRDS themselves qualify as creditable foreign taxes has been a genuinely unsettled question, with some guidance suggesting the IRS has acknowledged they may qualify in certain circumstances, while other tax practitioners note these social charges are not always treated as creditable income taxes under the treaty specifically. Given the inconsistency in how this gets applied, confirming current treatment with a cross-border preparer before filing is far more reliable than assuming either position by default.

Timing Distributions and Roth Conversions Before the Move

BecaUSAe Social Security stays outside the French tax system entirely while private retirement account withdrawals generally fall inside it, the order in which a retiree draws down different accounts can meaningfully change total French tax exposure. Leaning more heavily on Social Security relative to traditional IRA or 401(k) withdrawals, where the mix allows it, keeps a larger share of retirement income outside France’s taxing reach altogether, since the two income types are treated by entirely different countries under the treaty.

Completing Roth conversions, and taking large one-time distributions generally, before establishing French tax residency rather than after, is a strategy several cross-border advisors point to as reducing the ambiguity and potential tax exposure described earlier in this guide. This is a decision that benefits from cross-border tax modeling well before the move itself, not something to work out after arrival.

Common Mistakes USA Retirees Make

• Assuming all USA pension income is treated the same way, when government pensions, private pensions, and Social Security each follow different treaty rules.
• Assuming a Roth IRA stays tax-free in France without proper documentation to support that position.
• Overlooking CSG, CRDS, and CSM entirely becaUSAe they are not mentioned in the treaty’s pension article.
• Filing only FBAR or only Form 8938, rather than confirming whether both apply.
• Waiting until after establishing French residency to plan Roth conversions or large distributions, rather than sequencing them beforehand.

ConclUSAion

Retirement income does not move to France as a single, uniform category. Social Security stays exactly where it was, taxed by the USA alone. Private 401(k) and IRA income shifts to French taxation instead, the reverse of what most retirees expect. Government and military pensions stay behind in the USA tax system too. Roth IRAs sit in a gray area that rewards planning done before the move rather than after it. Layered on top of all of it are CSG, CRDS, and the CSM, charges the income tax treaty never addresses directly. Getting this right generally requires a cross-border tax preparer familiar with both systems, since the cost of getting it wrong tends to be measured in years of corrected filings rather than a single mistake.

Frequently Asked Questions

Does France tax USA Social Security benefits?

No. Under Article 18(1)(b) of the treaty, confirmed by a 2001 mutual agreement between the IRS and French tax authorities, USA Social Security paid to a French tax resident is taxable only in the United States. France exempts it from French income tax entirely.

Is a 401(k) or IRA taxed by France or the USA after moving there?

Generally by France. Under Article 18 of the treaty, private pension and retirement account income is taxable in the country of residence, with a credit mechanism to help prevent double taxation on the USA side.

Is Roth IRA income tax-free in France the way it is in the USA?

Not automatically. France does not have a matching domestic concept for a Roth IRA, and some French tax offices have treated distributions as ordinary taxable pension income, particularly without documentation supporting the account’s Roth statUSA.

Are military and government pensions taxed differently than private pensions?

Yes. Under Article 19 of the treaty, government service pensions, including USA military retirement pay, remain taxable only in the United States, unlike private pensions which generally shift to French taxation.

What are CSG and CRDS, and do they apply to USA retirees?

They are French social charges applied to pension and similar income, separate from income tax. Whether they apply depends on a two-part test: French tax domicile and affiliation with a compulsory French health insurance scheme such as PUMA.

What is the cotisation subsidiaire maladie (CSM)?

A supplemental healthcare contribution, around 6.5 percent for 2026, applied to worldwide passive income above a set threshold for residents with limited employment income, a profile that commonly describes American retirees living on pensions and investments.

Sources

Internal Revenue Service, USA-France Tax Treaty documents

Internal Revenue Service, Foreign Tax Credit

Service-Public.fr (French government public service portal)

Ameli.fr (official French health insurance portal, CPAM)