FATCA Explained: What European Banks Need From You
FATCA is the US foreign-account reporting regime that forces non-US financial institutions to identify and report accounts connected to US persons. For Americans living in Europe, it matters because the law reaches your local bank before it reaches your tax return. That is why banks ask for a W-9, a W-8BEN, proof of tax residency, or additional identity documents when they see US indicia on the account. The IRS FATCA overview says the regime generally requires foreign financial institutions to report foreign assets held by US account holders, while US taxpayers may also have their own separate reporting duties (IRS FATCA overview). FATCA is not a separate tax, but it is a real compliance system with real consequences if your paperwork does not match your status.
For expats, the practical point is that bank-side FATCA and taxpayer-side Form 8938 or FBAR reporting run in parallel. IRS Form 8938 guidance confirms that taxpayers living abroad have higher thresholds than domestic filers, but those thresholds do not excuse you from answering your bank accurately. “Most FATCA problems start as account-opening or account-maintenance problems, not as tax-return problems,” says Kari Foss-Persson, Esq., Managing Partner at Vinland Immigration. “If the bank thinks your status is unclear, the account can become the immediate issue.”
FATCA is a bank-reporting regime, not a separate tax, and it runs alongside the Report of Foreign Bank and Financial Accounts (FBAR). In practice, your bank uses certification forms to confirm your status, while you still file Form 8938 with your tax return when the thresholds are met.
What does FATCA actually require?
FATCA requires foreign financial institutions to identify accounts linked to US persons and report them through the applicable FATCA framework.
According to the IRS FATCA overview, FATCA was enacted as part of the HIRE Act and generally requires foreign financial institutions to report on foreign assets held by their US account holders or face withholding on certain payments. In Europe, that usually happens through local implementation and intergovernmental agreements rather than through direct contact between you and the IRS.
That is why your German, French, Swedish, or Norwegian bank may know about FATCA long before you think about Form 8938. The bank has its own due-diligence obligations, and your forms are part of that process.
Why is your bank asking for W-9 or W-8BEN forms?
Banks use W-9 and W-8-series forms to document whether you are a US person, a non-US person, or a customer whose status still needs clarification.
- W-9
- Used by US persons to certify a taxpayer identification number and confirm US status.
- W-8BEN
- Used by non-US individuals to certify foreign status and, where relevant, claim treaty benefits.
- US indicia
- Data points such as a US birthplace, US address, or US phone number that trigger extra due diligence.
If you are a US citizen, a W-8BEN does not replace a W-9 just because you also hold another passport. “Dual nationality often causes confusion, but the form depends on US tax status, not on which passport you prefer to use at the bank,” says Kari Foss-Persson, Esq., Managing Partner at Vinland Immigration.
What triggers FATCA reporting?
FATCA review usually starts when a bank sees US indicia in its records and needs supporting documents to classify the account correctly.
Common triggers include a US place of birth, a US mailing or residence address, a US phone number, standing instructions to transfer funds to a US account, or a power of attorney linked to a US address. A self-certification form is often only part of the cure. The bank may also ask for identity documents or explanations that resolve the indicium it found.
Form 8938 thresholds
Taxpayers living abroad file Form 8938 only when specified foreign financial assets exceed the higher expat thresholds set by the IRS.
IRS guidance on Form 8938 says taxpayers living abroad must file if they are filing separately and hold more than $200,000 at year-end or $300,000 at any time during the year, or if they are filing jointly and hold more than $400,000 at year-end or $600,000 at any time during the year.
How FATCA interacts with FBAR
FATCA and FBAR overlap, but they are separate filings with different thresholds, different forms, and different filing systems.
The Form 8938 instructions state that filing Form 8938 does not relieve you of the requirement to file FinCEN Form 114 when FBAR rules apply. The IRS also lists an initial Form 8938 penalty of $10,000 for failure to file in IRM 20.1.9, with continuation penalties that can push the total much higher if the failure continues after notice.
For many expats, both filings apply in the same year. The asset list is not identical, the thresholds are not identical, and the safest approach is to reconcile them together.
What should you do if your bank threatens to close the account?
An account-closure warning is usually a documentation deadline, not a tax judgment, so speed and consistency matter more than argument.
- 1
Respond with the requested forms
Provide the W-9 or other certification package promptly so the bank can classify the account before its internal deadline.
- 2
Ask whether the bank accepts US-person clients
Some institutions still serve US persons, while others are exiting that customer group entirely.
- 3
Open a replacement account early if needed
Do not wait for the closure date to start looking for another bank if the institution's policy is restrictive.
- 4
Align the bank file with your tax filings
Make sure the information on your FATCA paperwork matches your FBAR and Form 8938 reporting so you are not creating inconsistencies yourself.
Practical steps for ongoing compliance
FATCA compliance is mostly about keeping your bank certifications and your tax reporting consistent over time.
That means updating W-9 information when the bank asks, tracking whether Form 8938 thresholds are met, and coordinating FATCA reporting with FBAR reporting. Our cross-border tax practice helps US persons across Europe keep those filings aligned before an account review becomes a larger compliance problem.