FATCA letter from your foreign bank: What it means and what to do next
Getting a FATCA letter from your bank can feel alarming. It shouldn't. The letter usually means the bank flagged a possible US tax connection and needs documentation – typically a self-certification, a W-9, or a W-8BEN – to classify your account correctly.
You haven't necessarily done anything wrong. But you do need to respond, and how you respond matters. Banks send these letters because FATCA operates through foreign financial institution reporting and IGA frameworks.
Why did I get a FATCA letter from my bank?
Banks don't send these letters at random. There are specific triggers that flag an account for review, and most come down to what the IRS calls "indicia" – indicators that suggest a US tax connection.
Banks look for indicia of a US connection – examples include:
- A US birthplace listed in your account records
- A US mailing or residential address on file
- A US phone number associated with the account
- Standing instructions to transfer funds to a US account
- A power of attorney or signatory authority held by a US person
- Conflicting residency documentation the bank cannot reconcile
The exact application varies by bank and country and is governed by the FATCA rules and any local IGA guidance.
When one or more of these appear, the bank is required – under FATCA and the applicable IGA – to ask you to clarify your tax status. This "indicia plus self-certification" approach is the standard FATCA compliance model. In the UK, for example, banks follow HMRC guidance under the UK-US IGA when applying those rules.
If you hold US citizenship but live abroad, a FATCA letter is especially common. The US applies citizenship-based taxation, meaning US persons owe tax on worldwide income regardless of where they live. Banks operating under IGA agreements are required to identify and report those accounts.
What is a FATCA notice?
If you received a letter from your bank about FATCA, you may have searched "FATCA notice" trying to understand what it means. The two terms refer to the same thing – a formal compliance request asking you to document your tax status before the bank classifies your account for FATCA reporting.
It is not a penalty or a finding. It is a standard step banks are required to take under IRS and HMRC self-certification rules when they identify a potential US tax connection on an account.
What forms does the bank usually want: W-9 vs W-8BEN
Your bank needs to know one thing: are you a US person or not? The answer determines which form you send – and getting it wrong has real consequences.
US persons certify with Form W-9. This covers US citizens, green card holders, and anyone who meets the substantial presence test.
Non-US persons use a Form W-8BEN or another appropriate W-8 variant to certify their foreign status.
Where people go wrong is assuming that living outside the US changes their status. It does not.
US citizens and green card holders should not send a W-8BEN just because they live abroad. A US citizen in London is still a US person for tax purposes. Submitting a W-8BEN instead of a W-9 is not a workaround – it is a false certification, and the consequences are significantly worse than the original reporting obligation.
Which form should you send?
| The bank asks for | What it usually means | A US person sends | A non-US person sends |
|---|---|---|---|
| Form W-9 | Bank suspects a US tax connection | Form W-9 | Form W-8BEN |
| Form W-8BEN | Bank suspects non-US status | Form W-9 – not W-8BEN | Form W-8BEN |
| Self-certification | The bank needs a tax status confirmed | Certify as a US person + W-9 | Certify as a non-US person + W-8BEN |
FATCA letter vs FBAR vs Form 8938: not the same thing
Receiving a FATCA notice often pulls three different obligations into the same conversation. They are not the same thing, and mixing them up leads to real mistakes.
A FATCA letter from a bank is an institution-side compliance contact. The bank needs to classify your account correctly under FATCA rules. The IRS is not contacting you directly – your bank is.
FBAR (FinCEN Form 114) is a separate filing obligation. If you held foreign financial accounts with an aggregate value exceeding $10,000 at any point during the calendar year, you are required to report them to FinCEN – not the IRS.
Form 8938 is an IRS tax return attachment. It applies when your specified foreign financial assets exceed certain thresholds, which vary depending on your filing status and whether you live inside or outside the US.
You can have all three obligations at once, or just one.
FATCA letter vs FBAR vs Form 8938
| FATCA letter | FBAR (FinCEN 114) | Form 8938 | |
|---|---|---|---|
| Who asks | Your bank | FinCEN | IRS |
| Where filed | Response sent to your bank | FinCEN BSA e-filing system | Attached to your federal tax return |
| Trigger | Bank identifies US indicia on your account | Aggregate foreign accounts exceed $10,000 at any point in the year | Specified foreign financial assets exceed applicable thresholds |
| Main threshold | None – bank-driven | $10,000 aggregate | $50k–$75k (single, US) / $100k–$150k (joint, US) / $200k–$300k (single, abroad) / $400k–$600k (joint, abroad) |
| Typical example | A US citizen's account flagged at a UK bank | A US person with a foreign account worth $15,000 | US expat with $100,000 in foreign accounts and other assets |
What to do if you receive a FATCA letter
Responding to a FATCA letter from your bank is straightforward if you follow the right steps.
- Read the letter and find the deadline. Deadlines vary by bank and jurisdiction. Many banks request documents within a few weeks, but there is no universal deadline – check your letter for the exact date and contact the bank to request an extension if needed. Most institutions will accommodate a reasonable request.
- Identify exactly what the bank is asking for. The letter should specify what it needs – a self-certification, a W-9, a W-8BEN, a passport copy, or some combination. Your response should match the request precisely.
- Confirm your US person status before you do anything else. This is the most important step. US citizenship, green card status, and the substantial presence test can all make someone a US person for tax purposes, regardless of where they live. If you are unsure which category applies to you, get advice before you fill in anything.
- Send the correct form – do not guess. Your US person status under IRS rules determines which form you send: US persons certify with a W-9, non-US persons with a W-8BEN or appropriate variant. Sending the wrong form – especially a W-8BEN when you should send a W-9 – can look like a deliberate attempt to conceal your status, which carries consequences far worse than the original reporting obligation.
- Keep copies of everything. Save the original letter, the form you submitted, and any supporting documents. If the bank follows up, you want a clear paper trail of what you sent and when.
- Respond before the deadline – or ask for more time. If your situation is complex, say so and request an extension. The one thing banks will not accommodate is silence.
What not to do
A few common mistakes can turn a manageable FATCA notice into a much bigger problem.
- Don't ignore the letter. Banks that don't receive a response may restrict access to your account, close it, or report it as undocumented. Silence is never a neutral choice.
- Don't send the wrong form just to keep the account open. Submitting a W-8BEN when you are a US person is a false certification to a financial institution. The consequences are significantly worse than the reporting obligation you were trying to avoid.
- Don't assume living abroad means you are not a US person. If you were born in the US, hold a US passport, or have a green card, you are almost certainly still a US person for tax purposes – regardless of where you live.
- Don't attempt a quiet disclosure if you have past-due reporting issues. Slipping unreported accounts into amended returns without going through proper channels carries a serious risk. The IRS has Streamlined Filing Compliance Procedures and a Voluntary Disclosure Practice designed specifically for this situation – use them.
What if you are not compliant with US taxes or foreign account reporting?
If a FATCA letter from your bank prompted you to check your US filing history – and you realized something is missing – you are not alone, and you are not out of options.
The IRS has three main programs for this situation. Which one applies comes down to one question: was your non-compliance willful or not?
Streamlined Filing Compliance Procedures are the most common route – designed for taxpayers who failed to file because they simply did not know they had to, not because they were hiding anything. There are two tracks depending on where you live:
- Streamlined Foreign Offshore Procedures – for taxpayers living outside the US
- Streamlined Domestic Offshore Procedures – for US residents
If you have never filed at all, Streamlined may still be an option – the same willfulness question applies.
Voluntary Disclosure Practice (VDP) covers the opposite scenario. For willful cases, there are voluntary disclosure options, including the IRS Criminal Investigation voluntary disclosure practice – these routes are formal and carry significant legal considerations. Get specialist advice before proceeding.
Delinquent FBAR procedures apply in a narrower set of cases: missed FBAR filings with no unreported income attached.
The IRS would rather have taxpayers come forward through proper channels than stay non-compliant. Getting into the right program early is almost always the better outcome.
What if you are compliant already?
Not every FATCA letter signals a problem. If your US filings are current and the bank's classification is correct, the process is typically straightforward – you provide the requested documentation, keep a copy for your records, and the matter is resolved.
The bank completes its due diligence, your account gets classified correctly, and there is nothing further to address: no back taxes, no penalties, no compliance programs.
The one thing worth verifying is that the documentation you submit accurately reflects your tax status. A W-9 for US persons, a W-8BEN for non-US persons – confirming that detail is the whole job when your FATCA reporting obligations are already being met.
FATCA letter from a bank in the UK: Is anything different?
If you received a FATCA letter from a bank in the UK, the core US tax analysis is no different from anywhere else. Your obligations as a US person do not change based on which country your bank is in.
Where things differ is how UK banks handle the compliance process. Rather than reporting directly to the IRS, UK banks operate under the UK-US intergovernmental agreement (IGA), which routes FATCA reporting through HMRC.
As a result, a FATCA letter from a UK bank may come with HMRC-specific self-certification requirements and requests for additional supporting documents.
One point worth knowing clearly: the US-UK tax treaty does not remove FATCA or FBAR reporting duties. Living in the UK and benefiting from treaty provisions does not exempt you from those obligations.
If you are a US-UK dual citizen, a FATCA notice from your UK bank is especially common. The bank is doing what it is required to do under the IGA – but your broader US reporting obligations remain fully in place regardless of how the letter is framed.
Not sure where you stand?
- Review the letter and identify what the bank actually needs
- Confirm whether a W-9 or W-8 is appropriate for your situation
- Check whether FBAR or Form 8938 applies
- Assess whether Streamlined or another compliance option is the right path forward
FAQ
Not necessarily. A FATCA letter from your bank means the institution is running its own due diligence before it decides whether and how to report your account. It does not confirm that the IRS has already received or acted on any data about you.
If you don't respond to a FATCA notice, the bank may classify you as a recalcitrant or undocumented account holder. Depending on the bank and local law, this can lead to account restrictions, closure, withholding, or reporting. Contact the bank – silence is risk.
Only if you are genuinely a non-US person for tax purposes. US citizens and green card holders living abroad are still US persons and should send a W-9. Submitting a W-8BEN to avoid reporting implications is a false certification – and one that carries consequences far worse than the underlying obligation.
If you were born in the US but have lived abroad your entire life and were unaware of your US tax obligations, you are not alone – and you are not without options. Streamlined Filing Compliance Procedures were designed for exactly this situation. The key question is whether your non-compliance was non-willful, which, for most accidental Americans, it is.
Possibly, and independently of the FATCA letter. If you held foreign accounts exceeding $10,000 in aggregate at any point during the year, FBAR applies. If your specified foreign financial assets exceed the relevant thresholds, Form 8938 may also be required. The bank letter triggers none of these automatically – but it is a good reason to check.
The underlying US tax obligations are the same as anywhere else. The difference is that UK banks operate under the UK-US IGA and run their compliance process through HMRC, so you may be asked for additional self-certification documents. The US-UK tax treaty does not exempt you from FATCA or FBAR reporting duties.
