Pre-departure planning for US persons moving to France operates within a finite window. Once French tax residency is established, certain planning options close permanently and certain compliance obligations begin immediately. Identifying the date residency will begin, and acting before that date, is the foundational principle.
France taxes based on residency; the United States taxes based on citizenship. From the moment French residency begins, both countries have a claim on worldwide income simultaneously. The double taxation machinery — the Foreign Tax Credit, treaty provisions — is designed to manage that overlap, not eliminate the complexity. Pre-departure planning reduces the exposure that must be managed.
Step One: Identify the Residency Trigger Date
How French Residency Is Established
French tax domicile is established under Art. 4 B CGI when any one of four criteria is first met:
| Criterion | When It Is Triggered |
|---|---|
| Foyer (household) | The date a household is established in France — moving into a home, not counting calendar days |
| Lieu de séjour principal | When cumulative days in France during the calendar year exceed 183 |
| Activité professionnelle | When a professional activity is principally exercised in France |
| Centre des intérêts économiques | When principal investments and financial interests are located or managed in France |
For most US persons relocating to France, the foyer criterion is triggered first. This is the date of establishing a household, which commonly occurs when the person moves into a rented or owned residence in France. It is not tied to the 183-day rule. A person who moves to France on September 1 and establishes a household that day is a French tax resident from September 1, even though they will not reach 183 days until well into the following year.
Why this date matters precisely: French income tax for the year of arrival is prorated from the residency trigger date. Worldwide income earned before that date is not subject to French income tax. Income earned on and after that date is subject to French taxation. Every planning action described below must be completed before that date.
PFIC Repositioning Before Arrival
The PFIC Problem for Arriving US Persons
A Passive Foreign Investment Company (PFIC) is any foreign corporation where at least 75% of gross income is passive, or at least 50% of average assets produce passive income. Most foreign-domiciled mutual funds, foreign-domiciled ETFs, and many investment funds held through international brokerage platforms qualify as PFICs under this definition.
US persons arriving in France who hold PFIC investments face two layers of tax complexity:
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US PFIC rules: Under the default excess distribution method (IRC §1291), gains on PFIC shares are subject to tax at the highest ordinary income rate plus an interest charge, eliminating any preferential capital gains treatment. A QEF or mark-to-market election can improve US treatment, but requires a timely election.
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French capital gains rules: After French residency begins, any disposal of PFIC shares also triggers a French taxable event. The gain is subject to French capital gains tax (PFU at 30% for most financial assets), independently of the US PFIC treatment. There is no coordination between the two regimes.
What to Do Before Arrival
The pre-departure window allows a US person to sell PFIC holdings and recognize gain exclusively under US rules. No French tax applies to disposals completed before French residency begins. The resulting US tax — at standard capital gains rates, assuming no PFIC election complexity — is straightforward compared to the post-arrival alternative.
Practical steps:
- Identify all holdings that may qualify as PFICs (foreign mutual funds, foreign ETFs, any foreign investment fund with primarily passive income)
- Review brokerage accounts, international accounts, and any employer-provided investment vehicles for foreign-domiciled funds
- Sell or restructure PFIC-risk holdings before the French residency trigger date
- Reinvest proceeds into non-PFIC alternatives (US-domiciled index funds and ETFs, individual securities) that can be held across the transition without triggering PFIC consequences
Note: French-domiciled investment vehicles such as assurance-vie policies and the PEA are also PFIC-exposed under US law once held by a French resident who is also a US person. These accounts are discussed further in the Investment Structuring for US Persons in France article.
Retirement Account Planning
Roth IRA Funding and Conversions
From a US perspective, a US citizen can contribute to a Roth IRA regardless of residence, provided they have sufficient earned income not excluded by the Foreign Earned Income Exclusion. The contribution limit applies regardless of where the person lives.
The planning issue is French treatment of Roth IRA withdrawals. France does not recognize the US Roth IRA’s tax-free distribution status. When a French resident withdraws funds from a Roth IRA, France may treat the distribution as taxable pension income. The US-France treaty includes provisions for private pension plans, but the treaty’s application to Roth IRAs (particularly the question of whether the exemption from tax in the source country applies to the Roth’s tax-free treatment) is not settled definitively.
Pre-departure Roth conversion: A US person who holds a traditional IRA can convert it to a Roth IRA before French residency begins. The conversion generates US taxable income in the year of conversion. Because no French residency exists at the time, no French tax applies to the conversion itself. Future Roth withdrawals after establishing French residency may still be subject to French income tax on the principal portion, but the conversion locks in the US tax treatment at what may be a favorable US rate, before French-source income begins adding to the US taxable base.
401(k) and Employer Plans
Pre-departure contributions to a 401(k) up to the annual limit are advisable if the person is still employed in the United States before departure. Once French residency is established and salary becomes French-sourced employment income, the US income tax planning context changes. Contributions to employer plans while a French resident may still be deductible on the US return but are evaluated differently under French law. Maximizing US-only contributions before the transition is straightforward planning.
Severing US State Tax Domicile
Why State Residency Does Not End Automatically
US states impose income tax based on domicile, which is a legal concept distinct from physical presence. Several states, most notably California, New York, and Massachusetts, apply high scrutiny to claimed domicile changes. A person who leaves for France without taking deliberate steps to sever state domicile may continue to owe state income tax on worldwide income, creating a third layer of taxation alongside US federal and French obligations.
Steps Required to Sever Domicile
The specific requirements vary by state, but a credible domicile change typically requires the following actions, documented with dates:
- Obtain a driver’s license in a new jurisdiction (or internationally) and surrender the prior state license
- Update voter registration (typically requires registration in a new jurisdiction or cancellation)
- Change the address on all financial accounts, brokerage accounts, and government correspondences
- Close or transfer bank accounts in the prior state
- Sell, rent, or otherwise remove access to a primary residence in the prior state
- Surrender or transfer professional licenses, club memberships, and other formal ties
- Notify the state revenue authority of the change of address and non-resident status
Documentation: States may audit claimed domicile changes years later. Records of each action, with dates, are essential. The burden of proof is on the taxpayer to demonstrate that domicile changed before the claimed effective date.
Each state applies its own domicile analysis with its own standards and evidentiary expectations. High-scrutiny states such as California, New York, Virginia, and South Carolina have detailed administrative guidance on what constitutes a credible domicile change. Specialist review is advisable for residents of these states before departure.
Compliance Obligations That Arise at Arrival
Understanding what begins on the first day of French residency helps structure the pre-departure checklist.
| Obligation | Timing |
|---|---|
| French income tax on worldwide income | From the date French domicile is established |
| FBAR reporting for French accounts | As of any point in the year French accounts exceed aggregate $10,000 |
| Form 8938 (FATCA) — count French accounts toward threshold | Effective for the tax year in which accounts are opened |
| Form 2042 — first French return | Filed in spring of the year following arrival, covering the partial year |
| Prélèvement à la source (French withholding at source) | Employer begins withholding French income tax from salary |
French accounts opened before establishing residency are still reportable under FBAR and Form 8938 for the US tax year in which they are opened, regardless of residency status at the time. Opening a French bank account in December before a January move triggers FBAR reporting for that year.
Technical Reference
Art. 4 B CGI: The four residency criteria. Any one criterion alone establishes French tax domicile. The foyer criterion is typically the first to be satisfied for persons relocating with a household.
IRC §1291 (PFIC default regime): Excess distributions and gains on PFIC stock are taxed at the highest applicable ordinary income rate plus an interest charge. No capital gains rates apply. Holding PFICs through a French residency period multiplies the exposure.
IRC §408A (Roth IRA): Contributions allowed for US citizens regardless of residence, subject to earned income and MAGI limits. French treatment of distributions is governed by the US-France treaty and domestic French law — not by the Roth’s US tax-free status.
Art. 155 B CGI (Impatriate regime): Partial French income tax exemption for qualifying new residents arriving under employment arrangements. Must not have been French resident in the 5 preceding years. DGFiP notification required; cannot be elected retroactively.
FBAR (31 USC §5314): Reporting threshold is $10,000 aggregate across all foreign accounts at any point during the calendar year. The threshold applies to the calendar year, not to the period of French residency.
Frequently Asked Questions
When does French tax residency actually begin?
French tax residency begins on the date any one of the four criteria in Art. 4 B CGI is first met. For most US persons relocating to France, this is the date a household is established there (the foyer criterion), which typically coincides with moving into a home, not with reaching 183 days. The exact date determines the boundary between pre-departure and post-arrival planning: everything before that date is outside the French tax perimeter.
Why do I need to sell my mutual funds before moving to France?
Yes, reviewing and potentially selling mutual fund holdings before departure is advisable. Most foreign-domiciled mutual funds qualify as PFICs under US law. If you hold PFICs after establishing French residency, disposing of them triggers both US PFIC tax consequences and French capital gains treatment simultaneously. Selling before French residency begins limits the tax event to US rules only, avoids the PFIC holding period problem, and allows restructuring into non-PFIC alternatives before arrival.
Can I still contribute to my Roth IRA after establishing French residency?
Yes, from a US perspective, a US citizen resident in France can still contribute to a Roth IRA if they have sufficient earned income not excluded by the FEIE. However, France does not recognize the Roth’s tax-free distribution status, and withdrawals may be subject to French income tax. Pre-departure Roth conversions, converting traditional IRA balances to Roth before French residency begins, reduce the taxable base subject to future French treatment.
How do I sever my state tax domicile before leaving the US?
Severing domicile requires affirmative action before departure. The steps typically include: changing your driver’s license and vehicle registration to a new jurisdiction, updating voter registration, closing local bank accounts, changing the address on all financial accounts, surrendering professional licenses, and selling or renting out a primary residence. Documentation of each step with dates is essential. States like California, New York, and Massachusetts apply high scrutiny and may assert continuing residency if ties remain.
What US compliance obligations change when I become a French resident?
Several obligations arise or change at the moment French residency is established. The FBAR threshold applies to the aggregate value of all foreign financial accounts, including French accounts opened after arrival. Form 8938 thresholds apply to all specified foreign financial assets. The Foreign Earned Income Exclusion and Foreign Tax Credit become the primary tools for managing US income tax on French-source income. The annual French income tax return is also required from the first partial year.
Does the impatriate regime help with pre-departure planning?
Yes, for persons arriving under qualifying employment arrangements. The impatriate regime (Art. 155 B CGI) provides a partial exemption from French income tax for new residents who were not French residents in the five years before arrival and who are recruited from abroad. Eligibility must be assessed before departure; the regime cannot be elected retroactively after the election window closes.
Does opening a French bank account before the move trigger French residency?
No. Opening a French bank account before relocating does not by itself establish French tax residency. Residency under Art. 4 B CGI is determined by the four substantive criteria: household, principal place of stay, principal professional activity, and center of economic interests. A bank account alone does not satisfy any of these. However, it does create a reportable foreign financial account for FBAR purposes from the date the account is opened.