Moving to the United States represents an exceptional opportunity, both professionally and in terms of wealth planning. But it also means a profound change in fiscal, legal, and financial frameworks.
Many French nationals approach this transition thinking they can apply the same reflexes they had in France. In practice, this approach is unfortunately often the source of costly mistakes.
With a system that is more complex, more fragmented, and stricter when it comes to compliance, the United States requires quick adaptation.
1. Thinking the system is comparable to France
This is the most common mistake.
In the United States, there is not one single tax system, but several overlapping levels of taxation:
federal tax
state tax
sometimes local taxes
According to the Internal Revenue Service (IRS), taxpayers must comply with distinct obligations depending on their situation and location
Source: https://www.irs.gov/filing/individuals/how-to-file
For example, real estate income may be taxed differently depending on the state, which makes management significantly more complex compared to France.
2. Underestimating administrative complexity
The U.S. system is based on the principle of self-reporting.
An expatriate may have to manage several obligations each year:
federal tax return (Form 1040)
state tax return
FBAR for foreign accounts
FATCA (Form 8938) for certain assets
local filings depending on the situation
The Financial Crimes Enforcement Network (FinCEN) specifies that the FBAR is required when foreign accounts exceed a combined total of 10,000 dollars
Source: https://www.fincen.gov/report-foreign-bank-and-financial-accounts
Without coordination, the risk of error quickly becomes high.
3. Neglecting international taxation
Many expatriates continue using French financial products without understanding how they are treated for tax purposes in the United States.
Certain investments can lead to:
unfavorable taxation
additional reporting obligations
penalties in the event of incorrect reporting
The IRS states that certain foreign assets must be reported through Form 8938 under FATCA. Pay close attention to the issue of PFICs (Passive Foreign Investment Company).
Source: https://www.irs.gov/businesses/corporations/summary-of-fatca-reporting-for-us-taxpayers
Without a coordinated strategy, the risk of double taxation increases.
4. Wanting to manage everything alone
In the United States, taxpayer responsibility is central.
Unlike in France:
tax returns are not pre-filled
errors are not automatically corrected
penalties apply even without fraudulent intent
According to the IRS, penalties may be applied in the event of an error or omission, even if unintentional
Source: https://www.irs.gov/payments/penalties
This makes guidance essential in a cross-border context.
5. Failing to anticipate wealth protection
The U.S. system creates greater exposure to financial risks:
high medical costs
litigation risks
broader civil liability
According to the Centers for Medicare & Medicaid Services, healthcare spending represents a significant share of costs for American households
Source: https://www.cms.gov/data-research/statistics-trends-and-reports/national-health-expenditure-data
Without a protection strategy (insurance, legal structuring), an unforeseen event can weaken a wealth position.
6. Failing to structure your strategy from the start
Finally, many expatriates make decisions without an overall vision.
This can lead to:
inconsistent asset allocation
investments unsuited to the U.S. tax framework
difficulties in the event of a return to France
Conversely, structuring things from the moment you settle in helps avoid these inefficiencies.
Conclusion
Moving to the United States is not just about changing countries: it means entering a fundamentally different system.
The most costly mistakes do not come from a lack of opportunity, but from a lack of adaptation.
Understanding local rules, anticipating risks, and coordinating decisions allows this expatriation to become a true wealth-building success.
At USA France Financials™, we support French nationals in structuring their strategy, so they can avoid these mistakes and secure their development in the United States.
Alexandre Quantin
Partner – USAFrance Financials™
Director – Investments & Wealth Management Advisor
Future written communications may be in English only. Material discussed is meant for general informational purposes only and is not to be construed as tax, legal, or investment advice. Guardian and its subsidiaries do not provide tax or legal advice. Individuals should seek advice from their own qualified tax and legal professionals regarding their specific situation and any strategies discussed.
Compliance Code8970504.1