When France treats you as a tax resident

Americans often assume tax residency works like the US substantial presence test: count days, cross a line, become resident. France does not work that way. French law looks at where your home is, where you work and where your economic interests are, and meeting any one of those tests can be enough. This guide explains the rules from the French tax administration and the French tax code, and how they fit with your continuing US obligations.

Vaughn lived and worked in France in the 2010s. The rules below come from official sources checked on the date shown on this page, not from personal anecdote. This is general information; for a real decision about your residency, use a professional who handles both French and US tax.

The short version

• Under Article 4 B of the French general tax code (CGI), you have your tax domicile in France if you meet any one of three tests.
• Test one: your home (foyer) or, failing that, your main place of stay is in France.
• Test two: you carry on a professional activity in France, employed or not, unless it is only ancillary.
• Test three: the centre of your economic interests is in France.
• A tax treaty can override this. If the US France treaty treats you as resident of the United States, France cannot treat you as domiciled in France.
• US citizens remain subject to US tax on worldwide income regardless of French residency.

Test one: your home or main place of stay

The French tax administration (impots.gouv.fr) explains that you have your foyer in France if you live there in a habitual and permanent way, with your spouse or civil partner and possibly your children, or alone. The foyer is about where the household actually lives, not where you happen to spend a work trip.

The non-resident page on impots.gouv.fr adds a point that surprises people. If your household (spouse or PACS partner and children) stays in France, your foyer stays in France even if you spend most of the year abroad for work. A spouse who moves to France ahead of the other partner, or a family that stays in France while one parent works in the US, can therefore create French tax domicile.

If you have no foyer, the test falls back to your main place of stay, which the administration determines from your actual presence in France. There is no single day count written into Article 4 B, so do not rely on a fixed number of days as a safe harbour.

Test two: professional activity in France

Article 4 B treats as domiciled in France anyone who carries on a professional activity in France, employed or self-employed, unless they can show the activity is ancillary. The impots.gouv.fr resident page says you carry on a professional activity in France as your main activity if you devote the most actual time to it there.

For remote workers this matters. If you live in France and work remotely for a US employer, the work is carried on where you physically do it. The French test looks at activity in France, not the location of the employer.

Since February 16, 2025, Article 4 B also presumes that directors of companies headquartered in France with annual turnover above 250 million euros carry on their main activity in France, unless they prove otherwise. That rule affects few readers, but it shows the text was amended recently, so read the current version on Legifrance.

Test three: the centre of economic interests

Your economic interests are in France if that is where your main investments are, where your business is based, where your professional activities are centred, or where you draw most of your income. The resident page gives a simple example: a person whose French source income exceeds their foreign source income has the centre of their economic interests in France.

This test can catch retirees. A retiree who sells a US home, buys a French one and moves savings to French banks may meet this test as well as the home test.

The administration says these criteria are analysed for each person in the household separately, so spouses can, in some situations, have different tax domiciles.

When both countries claim you

French domestic law and US domestic law can each treat the same person as resident. The impots.gouv.fr pages explain that tax treaties set criteria that prevail over domestic law in that case, and residency under the treaty always prevails over domicile under French law. Article 4 B states the same rule directly: people who meet one of the tests are still not domiciled in France if a double tax treaty treats them as not resident in France.

The US and France have an income tax treaty from 1994, amended by protocols in 2004 and 2009, published by the IRS. Like other treaties, it uses tie-breaker steps such as permanent home, centre of vital interests, habitual abode and nationality.

For US citizens there is an important limit. Even if the treaty makes you a French resident, the US can still tax you as a citizen under the treaty's saving clause, with listed exceptions. The treaty mostly decides which country has the first right to tax specific income and how the other country gives relief.

What French tax residency means in practice

• You generally file a French income tax return on your worldwide income.
• You report foreign accounts, including US bank and brokerage accounts, on the French return under French rules.
• You use the treaty and foreign tax credits on both sides to avoid double taxation.
• You keep filing US returns, the FBAR and, where thresholds are met, Form 8938.

For the US side, see the guide to US taxes while living in France in this series.

The physical presence test is a US concept

Some Americans confuse French residency with the US foreign earned income exclusion. The IRS physical presence test requires 330 full days in a foreign country or countries in a 12-month period, and the bona fide residence test requires residence abroad for an uninterrupted period including a full tax year. Those are US tests for the exclusion. They do not decide whether France taxes you.

Leaving France

The impots.gouv.fr non-resident page says your status is determined by French domestic law and international treaties together. Moving out does not by itself end French domicile. If your household or main income stays in France, you may remain domiciled there even after you move.

Planning checklist

1. Write down where your household lives, where you work and where most of your income comes from.
2. If any of the three tests points to France, assume French residency and plan for a French return.
3. If both countries could claim you, read the residence article of the US France treaty.
4. Keep records of presence, work location and income sources.
5. Keep up your US filings in every scenario.

Common questions

Is there a 183-day rule for French tax residency? Article 4 B of the French tax code does not set a day count. It uses three alternative tests: home or main place of stay, professional activity and centre of economic interests. Days in France can matter as evidence of your main place of stay, but meeting any one test can make you domiciled in France.

Can my spouse be resident in France while I am not? The French tax administration says the criteria are analysed for each person in the household. It also says that if your spouse or partner and children stay in France, your foyer generally stays in France even if you work abroad for most of the year.

Does the US France treaty stop the US from taxing me? Generally no. US citizens remain taxable on worldwide income because of the saving clause. The treaty mainly allocates taxing rights and provides relief from double taxation, often through foreign tax credits.