The dream tends to arrive in stages. First it is just an idea. Then a visit becomes a longer stay, and the longer stay starts to feel like the real thing. By the time most Americans over 55 decide to make France their home, they have been thinking about it for years. Financial planning, however, often only begins in earnest in the months before departure, which is, for many of the most important decisions, already too late.

This is not a guide for people who want to think about France someday. It is for people who are going, and who want to arrive having made the decisions that cannot be unmade once French tax residency begins. Some of what follows involves time-sensitive planning decisions that are best addressed proactively. Some of it has consequences that compound quietly for decades. All of it is better addressed before you leave than after.

The items below are organized by time horizon: what to address two to three years out, what to prioritize in the final six to twelve months, and what needs to happen in your first ninety days on the ground. None of this should be treated as a template to execute alone. The value of a financial advisor in this process is not just knowing what to do, it is knowing what to do in what order, and how each decision affects the others. Our US Citizens in France service page explains how we work with Americans at every stage of this transition.

Phase 1: Two to Three Years Out

These are the decisions with the longest lead times and the highest cost of delay. They cannot be addressed in a final rush of pre-departure planning because they depend on your current US tax status, and that status changes the moment you establish French residency.

1. Model Your Roth Conversion Opportunity Now

Americans who plan to move to France after age 55 often consider Roth conversions in the years before they become French tax residents because, in many cases, converting while you are still subject to U.S. tax rules means the conversion is primarily taxed under U.S. law in the year it occurs (subject to your U.S. federal—and possibly state—tax situation). After you become a French tax resident, the cross-border consequences of the conversion and later withdrawals need to be modeled under both countries’ tax rules and the France–U.S. treaty approach, since the timing and characterization can affect the overall lifetime tax cost. Our guide on US Retirement Accounts When Moving to France covers the full conversion strategy and treaty mechanics.

2. Decide What to Do with Your 401(k) Before You Leave Employment and Confirm Your Custodian Will Serve Overseas Clients

If you are leaving US employment to make the move, your 401(k) requires a decision before you go. The three options are leaving it in the plan, rolling it to a Traditional IRA, or taking a distribution. The third option is almost always the most expensive, triggering ordinary income tax and a 10 percent early withdrawal penalty if you are under 59½. A direct rollover to a Traditional IRA is generally non-taxable, gives you broader investment options, and is far easier to manage from France than an account tied to a former employer’s plan administrator.

The important detail is timing. Executing this rollover while still a US resident is cleaner than managing it after your French residency begins, because the French tax treatment of a rollover executed as a French resident is less clearly defined than one that was already in a personal IRA before you arrived.

It is crucial to confirm your custodian serves overseas clients. Not all US brokerage firms and IRA custodians are comfortable servicing accounts for non-US residents. Some will restrict trading. Others will close accounts. The time to discover this is not after you have moved. Confirm your custodian’s overseas policy explicitly, in writing, before your departure date is fixed. If a transfer is needed, execute it while you are still a US resident to avoid any ambiguity about the tax treatment of the transfer itself.

3. Review Social Security Timing Against Your France Plan

If you are 55 and moving to France at 60 or 62, the question of when to claim Social Security is not a detail to defer. Claiming at 62 versus waiting until 70 can produce a difference in monthly benefit of over 75 percent, which, over a twenty-year retirement in France, represents a very significant sum in any currency. The optimal claiming age depends on your health, your other income sources, your spouse’s situation, and how Social Security fits alongside your French tax picture.

Social Security income paid to French residents is taxable only in the US under the treaty, not in France, which makes it a particularly tax-efficient source of retirement income in this context. The decision about when to claim, however, is a financial planning exercise that deserves proper modeling rather than a default to early claiming because it feels simpler. See our guide on US Social Security While Living in France for the full treaty and claiming framework.

4. Get Your Estate Documents in Order, Both US and French

A US will and a French notarial will serve different purposes and cover different assets. Having one without the other creates gaps. Having both without coordinating them creates conflicts. The most important planning decision at this stage is whether to make a Brussels IV election in your French will, explicitly choosing the law of your US nationality to govern your estate rather than French succession law. Without this election, French forced heirship rules apply to your worldwide estate by default, potentially distributing assets in ways you would never have chosen.

This election must be made in writing in a French notarial will. It requires a qualified notaire and ideally a cross-border adviser coordinating with your US attorney so the two documents do not conflict. This is not a task for the week before you leave. It is a two to three year conversation. Our full guide on Estate Planning for Americans in France covers wills, the Brussels IV election, the France-US estate tax treaty, and how to protect US assets across both systems.

The five-year residency clock: once you have been a French tax resident for more than five of the previous ten years, the IFI’s reach potentially expands to your worldwide real estate, not just French property. If you move at 55 and own US real estate, this clock starts ticking from day one. Planning your property portfolio before year five is considerably easier than restructuring after it.

Phase 2: Six to Twelve Months Before the Move

This is the execution phase. Decisions that were modeled and planned in the two-to-three-year window now need to be acted on. Several of these have hard deadlines tied to your last US tax year.

5. Execute Your Roth Conversions

If the modeling done in Phase 1 identified a conversion opportunity, this is the window to act on it. The optimal approach for most people is converting enough in each of the final one to three US tax years to fill lower brackets without pushing into the next one. For a married couple filing jointly in 2026, the 22 percent bracket extends to approximately $201,050 of taxable income above the standard deduction. Converting up to that threshold each year in the pre-move window is a widely used and efficient approach.

The One Big Beautiful Bill Act permanently extended the Tax Cuts and Jobs Act rate structure, removing the previous urgency around converting before an anticipated rate increase. The case for pre-France conversions rests on the treaty dynamics and French income tax rates rather than US rate concerns, and it remains strong.

6. Review and Update Every Beneficiary Designation

Beneficiary designations on US retirement accounts, life insurance policies, and annuities pass outside your will entirely. They are not governed by your US will, your French will, or the Brussels IV election. They go directly to whoever is named, regardless of what any other document says. An outdated designation, an ex-spouse, a deceased parent, or simply no named beneficiary at all, can route assets to the wrong person or create complications across two legal systems simultaneously. This review takes a few hours and costs nothing to correct. Skipping it is one of the most common and most easily avoided estate planning failures we encounter.

US retirement accounts with US-based beneficiary designations generally flow to those beneficiaries without triggering French inheritance tax, since the accounts are not French-situs assets and the beneficiaries are not French residents. Where a beneficiary is a French tax resident, the analysis is different. Our Estate Planning for Americans in France guide covers this distinction in full.

7. Understand Your IFI Position Before You Arrive

The French wealth tax on real estate, the Impot sur la Fortune Immobiliere, is assessed on January 1 of each tax year. If you arrive in France owning a French property and your net real estate value already exceeds EUR 1,300,000, you may be inside the IFI from your first full year of residency, assessed on your French assets only initially. If you also own US real estate and you cross the five-year residency threshold without having planned your portfolio structure, your US property could eventually enter the calculation.

Modeling your IFI position before you arrive is considerably easier than understanding it for the first time on your first French tax return. A financial advisor can help you assess whether your planned property structure is IFI-efficient or whether diversification into IFI-exempt financial assets makes sense as part of the move itself. Our guide on the French Wealth Tax (IFI) covers the threshold mechanics, the retroactive calculation, and the planning strategies in full.

8. Set Up Your French Banking Before You Land

Opening a French bank account as a US citizen is more straightforward from within France than from the US, but it carries FATCA compliance implications that are worth understanding in advance. French financial institutions must identify US persons and report relevant account information to the French tax authority under FATCA. Some banks are more practiced at onboarding American clients than others. Having a banking relationship established before you need to pay your first French landlord or utility bill reduces stress considerably.

FATCA is also the reason you will need to maintain annual Form 3916 disclosures for every US account you hold once you become a French tax resident, separate from your US FBAR obligation.

Phase 3: Your First Ninety Days in France

The decisions that could have been made before the move are behind you. The priority now is establishing your French compliance baseline correctly from day one, because errors made in the first year tend to be the most expensive to correct.

9. Establish Your French Tax Residency Status Clearly

French tax residency generally begins once you have been present in France for more than 183 days in a calendar year, or earlier if France becomes the center of your economic and personal life. The exact date matters, because it determines your first filing year as a French tax resident. Knowing precisely when that clock started gives your French tax adviser the correct baseline for your first déclaration des revenus and avoids any ambiguity about which tax year triggers your initial disclosure obligations.

10. File Form 3916 for Every US Account

From your first year as a French tax resident, you are required to file a Form 3916 for every account held at a financial institution outside France, including every US retirement account, every US brokerage account, and every US checking account you retain. A separate form is required for each account. Failure to file carries per-account penalties under French law. This is a disclosure obligation, not a taxation trigger, but it is mandatory and the penalties for non-compliance accumulate quickly. Your French tax adviser should be briefed on every US account you hold from your first meeting.

11. Declare All US Income on Your French Return, Even When It Is Exempt

Social Security, Traditional IRA and 401(k) distributions, and other US-sourced retirement income must all be declared on your French tax return even though the France-US Treaty allocates taxing rights exclusively to the US for most of these income types. France needs to see the income to apply the treaty credit mechanism correctly and to determine how it interacts with your overall French tax bracket. Failing to declare it creates a compliance gap that can attract penalties regardless of whether any French tax was actually owed.

12. Get a Coordinated US and French Tax Adviser Relationship Working

This is not optional. The interaction between your FEIE or Foreign Tax Credit election, your Roth conversion history, your IRA distributions, your French return, and your Social Security is complex enough that a generic adviser on either side of the Atlantic will not have the full picture. The best outcomes we see are where a qualified US expat tax preparer and a French tax adviser are both briefed fully on the client’s situation and can coordinate when decisions span both filings. Harrison Brook USA works alongside these professionals on the financial planning and investment side, rather than replacing either of them.

13. Review Your Investment Allocation for Cross-Border Efficiency

Once you are a French resident, certain US investment products become more complicated to hold. US mutual funds purchased inside a taxable brokerage account may be classified as Passive Foreign Investment Companies (PFICs) by the IRS if they are not structured correctly, triggering punitive tax treatment. Some investments that are straightforward for a US resident become reporting burdens for a French resident. A review of your taxable portfolio with a cross-border financial advisor in your first months in France can identify positions that need to be restructured before they create compliance complications in future years.

The Pre-Move Checklist at a Glance

Item	Phase	Window	What Happens If Delayed
Model Roth conversion strategy	1	2-3 years out	Conversion income taxed at French rates too; treaty benefit lost
Decide 401(k) rollover approach	1	Before leaving employer	Employer plan complications; potential forced distribution
Model Social Security claiming age	1	2-3 years out	Suboptimal lifetime benefit; cannot be undone once claimed
Draft coordinated US and French wills	1	2-3 years out	French forced heirship applies by default; estate distributed against your wishes
Five-year IFI clock planning	1	From day one	Worldwide real estate pulled into IFI at year five without warning
Confirm custodian overseas policy	2	6-12 months out	Account closure at the worst possible moment
Execute Roth conversions	2	Final pre-move tax years	Window closes at French residency; US-only tax rate advantage lost
Update beneficiary designations	2	6-12 months out	Assets route to wrong person; two-system legal complications
Assess IFI position and portfolio	2	Before arrival	IFI surprise in first French filing; harder to restructure after
Set up French banking	2	Before arrival	Practical banking friction; FATCA friction compounds
File Form 3916 for all US accounts	3	First French filing	Per-account penalties; accumulates annually
Declare all US income on French return	3	First French filing	Compliance gap; penalties regardless of whether tax owed
Coordinate US and French tax advisers	3	First 90 days	Misaligned filings; missed credits; compounding errors
Review taxable portfolio for PFIC risk	3	First 90 days	Punitive IRS tax treatment in future years

This table is a planning framework, not an exhaustive compliance checklist. Individual circumstances vary. Please work through each item with a qualified cross-border financial advisor and a US tax professional who specializes in expat filings.

FAQs – Moving to France After 55

Can I still do a Roth conversion if I have already moved to France?

It is possible but the analysis is more complex. A Roth conversion executed as a French tax resident triggers US income tax on the full amount converted, and French tax authorities may also characterize the conversion as a taxable event under French domestic rules. The pre-residency window is considerably cleaner. If you have already moved and have not done this, speak with a cross-border adviser to model what is still available rather than assuming the window has closed entirely.

Do I have to sell my US house before moving to France?

Not necessarily, but you should understand what happens to it from an IFI perspective as your years of French residency accumulate. For the first five of the last ten years of French residency, the IFI generally only applies to your French real estate. After that threshold, your worldwide real estate can potentially enter the calculation. The right answer depends on your total property picture, your financial needs, and your long-term plans for the property. This is a planning conversation rather than a blanket rule.

My spouse is French. Does that change the planning?

Significantly, in several areas. The unlimited US marital deduction does not apply to a non-US-citizen spouse, which means assets passing to a French national at your death may face US federal estate tax rather than being deferred. A Qualified Domestic Trust may be needed. On the French side, spouses and PACS partners are exempt from French inheritance tax, which is a meaningful benefit. The interaction of these two systems for a US-French couple deserves a dedicated planning review, not a footnote in a general guide.

What is the biggest financial mistake Americans make when moving to France after 55?

Without question it is waiting too long to start the financial planning conversation. The move itself takes enormous logistical energy, and the financial planning often gets pushed to the last few months before departure. By that point, the Roth conversion window may have narrowed, the estate documents may not be ready, and the first French tax return arrives as a surprise rather than something that was planned for. The clients who arrive in France in the best financial shape are almost always those who started the planning conversation two to three years before the move, not two to three months.

We do not have millions in assets. Does this level of planning still apply to us?

Yes, with appropriate calibration. The IFI threshold of EUR 1.3 million means many people will not face wealth tax. But the Roth conversion opportunity, the Social Security timing decision, the estate planning gaps, the FATCA disclosure requirements, and the importance of correctly declaring US income on French returns apply across a very wide range of asset levels. A first conversation with a financial advisor will quickly identify which items are genuinely material for your specific situation and which can be set aside.

Planning a Move to France After 55? The financial decisions that matter most happen before the move, not after. At Harrison Brook USA, we work with Americans in the pre-move window to make sure the right decisions happen in the right order. No obligation. No jargon. Just a clear picture of where you stand and what to do next.

Disclaimer: This article is for informational purposes only and does not constitute financial, tax, or legal advice. Tax rules in both the United States and France change frequently and individual circumstances vary significantly. Harrison Brook USA is a financial planning and investment advisory firm and does not provide tax preparation or tax advisory services. Please consult a qualified cross-border financial advisor for personalized financial planning guidance and a qualified US tax professional who specializes in expat filings for tax compliance matters.