Taxes for French-American Couples

Introduction

When one spouse holds a US passport and the other holds a French one, tax season becomes a cross-border affair. The United States taxes its citizens and permanent residents on their worldwide income, regardless of where they live. France taxes residents on worldwide income too, but only taxes non-residents on their French-source income. For a binational couple, this overlap creates the very real risk of the same euro or dollar being taxed twice.

The good news is that a network of treaties, credits, and exemptions exists to prevent most double taxation. The bad news is that understanding and correctly applying these rules takes effort. This guide walks you through the major topics — from the US-France Tax Treaty to FBAR filings, from prélèvement à la source to the Social Security totalization agreement — so you can plan with confidence and avoid costly mistakes.

The US-France Tax Treaty, Explained Simply

The Convention between the United States and France for the Avoidance of Double Taxation, signed in 1994 and amended by protocol in 2009, is the foundational document that governs how the two countries share taxing rights. It covers income tax, capital gains tax, and — importantly for couples — certain aspects of estate and gift tax.

What the treaty does

At its core, the treaty assigns taxing rights for different categories of income to one country or the other (and sometimes both). For each category it specifies which country gets the first right to tax and how the other country must provide relief, usually through a foreign tax credit. Here are the key categories:

• Employment incomeis generally taxed where the work is physically performed. If the French spouse works at a company in Lyon, France gets the primary taxing right, even though the US spouse must still report the couple’s worldwide income to the IRS.
• Dividendsmay be taxed in the country of the payer’s residence, but the treaty caps the withholding rate at 15 % (or 5 % for substantial shareholdings). The country of the recipient’s residence then grants a credit for the withholding tax.
• Interestis generally taxable only in the recipient’s country of residence, meaning that if a French resident earns interest from a US bank account, France taxes it, and the US should not withhold.
• Real property income and capital gains are taxed in the country where the property is located. If you sell a house in Provence, France taxes the gain. If you sell a condo in Brooklyn, the US taxes it.
• Pensions have complex rules. Government pensions (Social Security, retraite de la fonction publique) are generally taxed only by the paying country. Private pensions may be taxed by the country of residence.

The saving clause

One critical feature of the US-France Treaty — and nearly every US treaty — is the saving clause (Article 29). This clause preserves the right of the United States to tax its own citizens and residents as if the treaty did not exist. In practice, this means a US citizen living in France must still file a US tax return and report all income. The treaty then provides relief primarily through the foreign tax credit mechanism rather than by exempting the income.

Filing Taxes as a Binational Couple

US filing status: Married Filing Jointly vs. Married Filing Separately

If you are legally married and one spouse is a US citizen or green card holder, you have two main options for your US federal return:

• Married Filing Jointly (MFJ) — Both spouses report all of their worldwide income on a single return. This generally produces a lower total tax bill thanks to wider tax brackets and eligibility for more credits and deductions.
• Married Filing Separately (MFS) — Each spouse files their own return. The non-US spouse does not need to file at all unless they have US-source income. Tax brackets are narrower and many deductions and credits are reduced or eliminated.

Electing to treat the non-resident spouse as a US resident

To file jointly, both spouses must agree to be treated as US tax residents for the full year. The non-US spouse makes this election under IRC Section 6013(g) by attaching a statement to the first joint return. Once made, this election remains in effect for all future years until revoked (and revoking it is generally irrevocable — you cannot re-elect later).

The benefit of MFJ is significant: wider brackets, the full standard deduction, eligibility for the Earned Income Tax Credit (if applicable), and education credits. However, the cost is that the French spouse’s worldwide income is now reportable to the IRS, and both spouses become jointly and severally liable for the entire tax obligation.

When MFS might make sense

Filing separately is sometimes preferable when:

• The French spouse has high income that would push the couple into a higher US bracket with limited foreign tax credit benefit.
• The couple wants to keep the French spouse entirely outside the US tax system (no worldwide reporting, no FBAR obligations tied to joint accounts).
• The couple is separated or there are liability concerns.

French filing: the déclaration commune

In France, married couples and partners in a PACS (civil union) file a joint tax return called a déclaration de revenus commune. There is no “filing separately” option for married couples under French law (except in the year of marriage or divorce, where each spouse may file individually for the portion of the year before the event). The French system uses the quotient familial— a family-based income splitting mechanism — which divides household income by a number of “parts” reflecting family size. A married couple without children has two parts; each child adds 0.5 parts (or one part for the third child and beyond).

FBAR & FATCA Requirements

Beyond the income tax return itself, US persons with foreign financial accounts face two separate reporting regimes that carry severe penalties for non-compliance.

FBAR — FinCEN Form 114

The Report of Foreign Bank and Financial Accounts, commonly called the FBAR, must be filed by any US person who has a financial interest in, or signature authority over, foreign financial accounts with an aggregate value exceeding $10,000 at any point during the calendar year. This threshold is surprisingly easy to reach: it covers checking accounts, savings accounts, livrets (French savings booklets such as the Livret A and Livret de Développement Durable), securities accounts, and even some life insurance policies like the popular French assurance-vie.

• Who files? US citizens, green card holders, and US tax residents. If you file a joint return, accounts held solely by the non-US spouse are also reportable.
• Deadline: April 15, with an automatic extension to October 15. No separate extension request is needed.
• How to file: Electronically through the BSA E-Filing system (not with your tax return).
• Penalties: Non-willful violations carry a penalty of up to $10,000 per account per year. Willful violations can reach the greater of $100,000 or 50 % of the account balance. Criminal penalties are also possible.

FATCA — Form 8938

The Foreign Account Tax Compliance Act (FATCA) introduced a second reporting requirement via IRS Form 8938 (Statement of Specified Foreign Financial Assets). Despite the overlap with FBAR, Form 8938 is a separate obligation filed with your income tax return.

The thresholds for Form 8938 depend on where you live:

• Living in the US: You must file if the total value of specified foreign assets exceeds $50,000 on the last day of the tax year, or $75,000 at any time during the year (double those amounts for MFJ filers: $100,000 / $150,000).
• Living abroad: The thresholds are higher — $200,000 on the last day or $300,000 at any time (MFJ: $400,000 / $600,000).

Form 8938 covers a broader set of assets than the FBAR: in addition to bank accounts, it includes foreign stock or securities not held in a US financial account, interests in foreign entities, and foreign pension plans. The penalty for failure to file is $10,000, with an additional $10,000 for each 30-day period of continued non-filing after IRS notice, up to a maximum of $60,000.

FBAR vs. FATCA — quick comparison

French Tax Obligations

If the couple lives in France — or if either spouse is a French tax resident — there are specific French tax rules to understand.

Impôt sur le revenu (income tax)

France’s personal income tax is progressive, with rates ranging from 0 % to 45 % in 2026. The brackets apply after dividing household income by the number of parts (the quotient familial discussed above). The resulting tax per part is then multiplied back by the number of parts. This mechanism benefits families — particularly those with children — by effectively taxing the household at a rate corresponding to its per-person income.

The 2026 income tax brackets (on 2025 income) are approximately:

• 0 % on income up to €11,497
• 11 % from €11,498 to €29,315
• 30 % from €29,316 to €83,823
• 41 % from €83,824 to €180,294
• 45 % above €180,294

In addition, high earners may owe the contribution exceptionnelle sur les hauts revenus(CEHR), an additional 3 % on income above €250,000 for singles or €500,000 for couples, rising to 4 % above €500,000 / €1,000,000.

Prélèvement à la source (withholding at source)

Since January 2019, France collects income tax through withholding at source, called the prélèvement à la source (PAS). Employers deduct tax directly from salary each month based on a rate communicated by the tax authorities. Self-employed individuals and those with other income pay monthly or quarterly installments called acomptes.

The annual déclaration de revenus (tax return), filed online between April and June each year, reconciles the amounts already withheld with the actual tax owed. If too much was withheld, the government issues a refund (usually in late July or August). If too little was withheld, the remaining amount is collected in the fall.

For a binational couple, the withholding rate is calculated based on the couple’s joint income and number of parts. Spouses may also elect individualized withholding rates — a feature called taux individualisé— so that each spouse’s paycheck reflects their own proportional share of the tax burden. This does not change the total tax owed; it only changes the split between paychecks.

Contributions sociales (social charges)

French tax residents also owe social charges on investment income and capital gains. The main levies are:

• CSG (Contribution Sociale Généralisée) — 9.2 % on most investment income
• CRDS (Contribution au Remboursement de la Dette Sociale) — 0.5 %
• Prélèvement de solidarité— 7.5 %

Combined, these total 17.2 %on investment income. For EU/EEA residents affiliated with a European social security system, the CSG/CRDS portion may be replaced by the solidarity levy alone (7.5 %). This distinction matters for the American spouse: because the US is not in the EU, French authorities typically impose the full 17.2 % on their investment income unless they are affiliated with a French social security scheme.

Reporting US-source income in France

If the couple lives in France, both spouses must report their worldwide income on the French return, including US-source income. This includes wages, freelance income, rental income from US property, dividends, and interest. France will then grant relief — usually in the form of the crédit d’impôt — for income that was already taxed in the US under the treaty.

Avoiding Double Taxation

The most important practical question for any binational couple is: how do I make sure I do not pay tax twice on the same income? The answer relies on two main mechanisms — one on each side of the Atlantic.

On the US side: the Foreign Tax Credit (Form 1116)

US citizens and residents can claim a credit for income taxes paid to a foreign country using IRS Form 1116. The credit is limited to the amount of US tax attributable to the foreign-source income — you cannot use French taxes on French income to offset US tax on US income.

Key points about the foreign tax credit:

• Income must be categorized into “baskets”: general category income (most wages and business income), passive category income (dividends, interest, rents), and others. You need a separate Form 1116 for each basket.
• If your foreign taxes exceed the US tax on that income (common when living in France, where rates are often higher), the excess carries over for up to ten years.
• French social charges (CSG, CRDS) have historically been a gray area. The IRS has generally accepted CSG as a creditable tax, but CRDS and the prélèvement de solidarité are not always accepted. Consult a specialist on this point, as the rules have shifted over the years.
• As an alternative to the foreign tax credit, US citizens abroad can use the Foreign Earned Income Exclusion (FEIE) under IRC Section 911, which excludes up to $130,000 (2026 figure, adjusted annually for inflation) of foreign-earned income. However, you cannot use both the FEIE and the foreign tax credit on the same income. For most couples in France, the foreign tax credit is more beneficial because French tax rates are high enough to generate a credit that covers or exceeds the US liability.

On the French side: the crédit d’impôt

Under the US-France Tax Treaty, France eliminates double taxation through a mechanism called the crédit d’impôt égal au montant de l’impôt français (a tax credit equal to the French tax). In practice, this works as follows for most categories of US-source income:

• The US-source income is included in the French tax base to determine the applicable rate (this is called the taux effectif method).
• France then grants a credit equal to the French tax attributable to that income, effectively exempting it from French tax while preserving the progressive rate on the remaining income.

For example, if James earns $45,000 freelancing for US clients while living in France, that income is reported on the French return and increases the household’s taux effectif. However, a credit equal to the French tax on that $45,000 is applied, so the couple does not actually pay French tax on it. The effect is that James’s US income is taxed only in the US, but it pushes Sophie’s French income into a slightly higher bracket.

It is important to declare this income correctly on the French return using the appropriate boxes on Form 2047 (Déclaration des revenus encaissés à l’étranger) and carry the amounts to the correct lines of Form 2042. Errors here are common and can result in being taxed twice or losing the credit entirely.

The Foreign Earned Income Exclusion (FEIE) vs. the Foreign Tax Credit

US citizens abroad can elect the FEIE (Form 2555) to exclude up to $130,000 of earned income from US taxation. However, this choice has trade-offs:

• You cannot claim a foreign tax credit on excluded income. If French taxes on the excluded income exceed what US taxes would have been, you lose the excess — there is no carryforward.
• The FEIE does not apply to investment income, rental income, or pension income.
• Once revoked, you cannot re-elect the FEIE for five years without IRS approval.

For most binational couples where the US citizen lives in France and pays French tax at effective rates above 20-25 %, the foreign tax credit is the more advantageous route. Run the numbers for your specific situation.

The Social Security Totalization Agreement

The US-France Social Security Totalization Agreement, in effect since 1987, addresses two problems faced by binational couples and cross-border workers:

1. Dual contributions: Without the agreement, a person working in France might owe social security contributions to both the US (Social Security / Medicare taxes) and France (cotisations sociales). The agreement generally assigns coverage to the country where the work is performed.
2. Qualifying for benefits:Each country requires a minimum number of contribution periods to qualify for retirement benefits. The agreement lets you “totalize” — that is, combine — your work credits from both countries to meet the minimum thresholds.

How it works in practice

If you work in France, you pay into the French system only (cotisations salariales and cotisations patronales). You do not owe US FICA taxes. However, for US benefit purposes, your French contribution quarters can be counted toward the 40 quarters (10 years) needed to qualify for US Social Security retirement benefits.

Conversely, if you worked in the US before moving to France, those US quarters can help you meet France’s minimum contribution requirements for the retraite de base (basic pension).

When you eventually claim benefits, each country pays a partial benefit based on the contributions made to its own system. You may end up receiving both a US Social Security check and a French pension de retraite, each calculated on the work history in that country alone.

The Windfall Elimination Provision (WEP)

US citizens who receive a foreign pension may see their US Social Security benefit reduced under the Windfall Elimination Provision. WEP applies when you receive a pension from employment not covered by US Social Security (such as most French employment). The reduction can be significant — several hundred dollars per month. The totalization agreement does not override WEP, so factor this into your retirement planning.

Practical Tips & Common Mistakes

Mistakes to avoid

• Forgetting the FBAR. This is the single most common compliance failure among Americans in France. The $10,000 aggregate threshold is low, and penalties are harsh. Set a calendar reminder for April 15 each year.
• Not reporting the French assurance-vie. The popular French life insurance savings vehicle (assurance-vie) is reportable on both the FBAR and potentially Form 8938. It may also trigger complex PFIC (Passive Foreign Investment Company) reporting if the underlying funds are non-US. Some advisors recommend avoiding this product entirely if you are a US person.
• Investing in French mutual funds (OPCVM/SICAV). From the US perspective, most French mutual funds qualify as PFICs, which are subject to punitive US tax treatment. US persons in France are generally better off investing through US-based brokers in US-domiciled funds (ETFs, for example). Be aware that many US brokers will not open accounts for clients with a French address, so plan ahead.
• Miscalculating the exchange rate. The IRS requires that foreign income be converted to US dollars. Use the IRS annual average exchange rate for income, and the spot rate on the date of specific transactions (for capital gains, etc.). Inconsistent conversion methods trigger audit flags.
• Filing Form 2047 incorrectly. The French déclaration des revenus encaissés à l’étranger requires careful allocation of income by treaty category. A common error is placing US income in the wrong box, leading either to double taxation or to an undeserved exemption that the French authorities later claw back.
• Ignoring state taxes.Some US states tax former residents for years after they leave. California is notorious for its “safe harbor” rules. If you moved from a US state to France, confirm that you have properly severed your state tax residency.

Organizational tips

• Maintain a shared folder with tax documents from both countries: US W-2s or 1099s, French bulletins de paie, the avis d’imposition (French tax assessment notice), brokerage statements, and bank account summaries.
• Run MFJ vs. MFS calculations each year. The optimal filing status can change as incomes and exchange rates shift.
• File for extensions proactively. US citizens abroad receive an automatic two-month extension to June 15, and can request a further extension to October 15 using Form 4868. Interest still accrues from April 15, but there is no late-filing penalty if you extend. This extra time is essential when waiting for French tax documents that arrive in April or May.
• Use the Streamlined Filing Compliance Procedures if you have fallen behind on FBARs or tax returns. The IRS offers a path to come into compliance without the full weight of penalties, provided your failure was non-willful. Do not use the streamlined procedures without professional guidance.
• Coordinate with a cross-border specialist. A general US tax preparer or a local French expert-comptable may not understand the nuances of treaty application. Seek out a professional with specific experience in US-France tax matters. Organizations like the American Chamber of Commerce in France (AmCham) maintain referral lists.

Summary

Navigating taxes as a French-American couple requires attention to two distinct — and sometimes conflicting — tax systems. Here are the essential points to carry with you:

1. The US taxes citizens worldwide. The American spouse must file a US return every year, no matter where the couple lives. The French spouse may also need to file if the couple elects MFJ.
2. The US-France Tax Treaty allocates taxing rights by income category and provides relief primarily through tax credits, not exemptions.
3. FBAR and FATCA are separate from income tax but carry penalties that can dwarf the underlying tax. Report every foreign account, every year.
4. France’s quotient familial and withholding-at-source system work differently from the US approach. Understand the déclaration commune and Form 2047 to ensure foreign income is credited correctly.
5. Foreign tax credits (Form 1116 on the US side, crédit d’impôt on the French side) are the primary tools for eliminating double taxation. Use them carefully and consistently.
6. The totalization agreement prevents dual social security contributions and lets you combine work credits for benefit eligibility — but watch out for the WEP reduction.
7. Get specialized help. The interplay between these two systems is genuinely complex. A cross-border tax advisor is not a luxury; for most binational couples, it is a necessity.

Tax compliance is not optional, and the consequences of getting it wrong range from overpaying to facing serious penalties. But with the right knowledge and the right advisors, a French-American couple can confidently meet their obligations in both countries — and keep more of what they earn.