Accidental Americans in Europe: What US Citizenship Means for Your Finances

"Accidental American" is not a legal term, but it describes a real group: people who are, or may be, US citizens by birth without meaningful ties to the United States - born there and moved away as infants, or born in Europe to a US-citizen parent whose own history satisfied the transmission rules. Many first meet the question through a bank's paperwork rather than a passport.

This article is aimed at people in France, Switzerland, Portugal or the Netherlands who suspect or have learned that they may be US citizens, and at the families and advisers helping them. It explains, from the published sources only, why the question reaches a European bank account, what US law actually asks of a citizen abroad, which compliance routes the IRS currently publishes, and what renunciation and the expatriation tax factually involve. It recommends no path and discourages none; every decision here belongs with the named professionals.

This article describes how United States federal tax law and the relevant income tax treaties and totalization agreements apply to US persons. It summarises French, Swiss, Portuguese and Dutch rules only as published by each country's tax and social security authorities, for context, and is not French, Swiss, Portuguese or Dutch tax, legal or succession advice - those questions belong with a professional qualified in the relevant country.

Why the letter from your bank arrived

Two published facts meet in that envelope. First, the United States taxes on the basis of citizenship: in the IRS's words, "You must pay U.S. income tax on your foreign income regardless of where you reside if you are a U.S. citizen or U.S. resident alien." Citizenship, not residence or even awareness, is what attaches the system.

Second, the Foreign Account Tax Compliance Act (FATCA, IRC §§1471–1474) asks foreign financial institutions to identify US accounts, which is why the question reaches you through a bank. The implementation differs by country: Switzerland operates under a Model 2agreement in force since 2 June 2014 - banks report with client consent, with a signed Model 1 change not in force (earliest 1 January 2029 as published) -while Portugal (Model 1, in force since 2016) and the Netherlands (Model 1, in force since 2015) operate agreements under which banks report to their own tax authority, which exchanges with the United States. For France, this series states only the statute: the FATCA framework itself. A bank asking is following its rulebook; the letter is process, not accusation.

Who is a US citizen from birth abroad - in outline

Citizenship at birth is statutory; for births abroad the outline sits in 8 U.S.C. §1401. A child born abroad to two US-citizen parents is a citizen at birth where one parent "has had a residence in the United States" before the birth; a child of one US-citizen and one alien parent, where the citizen parent was physically present in the United States for at least five years, "at least two of which were after attaining the age of fourteen years."

That outline is deliberately incomplete. Different rules apply to births out of wedlock, the statutes have changed over the decades, and the US immigration authorities' own manual instructs officers to apply "the applicable statutory provisions and conditions that existed at the time of the person's birth." Whether a particular person actually acquired citizenship - and what evidence would show it - is an individual determination for an immigration attorney, not something any article can settle. Both truths matter: some people who fear they are citizens are not, and some who assume they are not, are.

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What US law actually asks of a citizen abroad

For a citizen, the asks are the same ones running through this whole series, stated here without drama: an annual Form1040 on worldwide income where the filing thresholds are met; FinCEN Form 114(FBAR) once foreign accounts exceed $10,000 in aggregate; Form 8938 at the living-abroad thresholds; and Form 8621 where the PFIC rules touch European funds.

Two structural points belong beside the list. The system contains its own large offsets - the foreign earned income exclusion ($132,900 for 2026) and foreign tax credits for taxes paid in high-tax European countries - so what a return would show is a question of individual facts, not something to assume in either direction. And the obligations are annual and ordinary: the special procedures in the next section exist precisely because Congress and the IRS know that people discover these rules late. What the published sources ask of someone in that position is engagement with the rules, through professional hands - nothing in them frames lateness as anything other than a solvable filing history.

The published routes into compliance, stated neutrally

The IRS currently publishes an options page listing three routes for taxpayers with undisclosed foreign financial assets: the Streamlined Filing Compliance Procedures, the delinquent international information return submission procedures, and the Criminal Investigation Voluntary Disclosure Practice. For most accidental Americans the first is the one advisers examine, in its Foreign Offshore form.

The Streamlined Foreign Offshore Procedures, as published: an individual citizen or green-card holder qualifies on residency where, in any one or more of the most recent three years for which the return due date has passed, they "did not have a U.S. abode" and were "physically outside the United States for at least 330 full days"; they file returns for the most recent three years and FBARs for the most recent six; and they certify on Form 14653 that the failures" resulted from non-willful conduct." The published penalty terms for the foreign track are quoted because they are the point: a taxpayer who complies "will not be subject to failure-to-file and failure-to-pay penalties, accuracy-related penalties, information return penalties, or FBAR penalties." The same page adds one published caveat: even if returns filed under the procedures are later selected for audit, those protections hold" unless the examination results in a determination that the original tax noncompliance was fraudulent and/or that the FBAR violation was willful." Eligibility is as published, outcomes depend on individual facts, and the fit of the route to a person's history is exactly what a US tax professional assesses.

The delinquent international information return submission procedures cover the narrower case of missing information returns, filed with the relevant return and, where asserted, a reasonable-cause statement - with penalties assessed "in accordance with existing procedures" as the page states. One change is worth recording: the IRS page for a separate delinquent-FBAR route was no longer available at the date of writing, and the current options page does not list one - so which door fits an FBAR-only history is, today, a question for the professional rather than a published self-service route.

Renunciation and the exit tax, as facts

This section neither recommends nor discourages any path: renunciation is a legal act with tax consequences, and the decision belongs with an immigration attorney and a US tax professional working from your facts. What follows is what the published sources state - the act, the fee, the document, and the tax tests that attach.

The act itself is statutory: under 8 U.S.C.§1481(a)(5), a citizen may lose nationality by "making a formal renunciation of nationality before a diplomatic or consular officer of the United States in a foreign state, in such form as may be prescribed by the Secretary of State." The documentary outcome is the Certificate of Loss of Nationality (CLN). The fee changed recently: a State Department final rule published 13 March 2026 reduced the administrative processing fee for a CLN request from $2,350 to $450, effective thirty days after publication - older figures still circulate and no longer apply.

The tax side is IRC §§877–877A. A" covered expatriate" is one who meets any of three tests: average annual net income tax for the five preceding years above an indexed threshold - more than $211,000 for 2026 under Rev. Proc. 2025-32; net worth of $2,000,000or more on the expatriation date - a figure the statute does not index; or failure to certify under penalty of perjury five years of US tax compliance. For a covered expatriate, §877A treats all property as sold on the day before expatriation at fair market value, with the resulting gain reduced by an exclusion of $910,000 for 2026. The certification, and the expatriation reporting itself, run through Form 8854 (Initial and Annual Expatriation Statement).

One exception matters especially here, and it is narrower than commonly retold. Under §877A(g)(1)(B), an individual "shall not be treated as meeting the requirements" of the tax-liability or net-worth tests if they became at birth a citizen of the United States and of another country, continue to be a citizen of - and are taxed as a resident of - that other country at expatriation, and were US residents for no more than 10 of the 15 taxable years ending with the expatriation year. Read precisely: the exception switches off tests (A) and (B)only. The five-year certification test still applies, which is why the compliance question and the renunciation question are sequenced together by the professionals rather than taken in isolation.

For a specific group, the IRS publishes a dedicated route: the Relief Procedures for Certain Former Citizens, for people who relinquished citizenship after 18 March 2010, have "no filing history as a U.S. citizen or resident," have net worth below $2,000,000 and aggregate tax liability of $25,000 or less across the covered years, and whose failures were non-willful. As published, those who qualify "will not be' covered expatriates' under IRC 877A, nor will they be liable for any unpaid taxes and penalties for these years or any previous years." Its terms are as stated on the IRS page; whether a person fits them is, once more, the professionals' assessment.

The professionals for exactly this situation

Accidental-American questions cross three specialisms at once, and the working team reflects it: a US tax professional experienced with streamlined filings and expatriation cases; an immigration attorney for the citizenship determination and, if chosen, the renunciation process; and the local professional in your country for everything the local system asks.

The sequence usually runs: establish the citizenship facts first, then the filing picture, then - only with both in hand - any decision about the future. None of it needs to be decided the week the bank letter arrives; all of it benefits from being decided deliberately, on the published rules, with the right people in the room.