FATCA Explained: What Startup Founders with International Ties Need to Know

The Foreign Account Tax Compliance Act, commonly known as FATCA, is a US federal law that requires foreign financial institutions to report information about accounts held by US taxpayers directly to the IRS. It also requires US individuals with significant foreign financial assets to report those assets on their tax return.

FATCA was enacted in 2010 as part of the HIRE Act, primarily to crack down on offshore tax evasion. But its reach extends well beyond those with intent to hide assets. Startup founders with international structures, foreign bank accounts, or equity in overseas entities are directly affected, whether they know it or not.

Who does FATCA apply to?

FATCA operates on two levels, and both matter to startup founders.

Level 1: Individual US taxpayers. If you are a US citizen, green card holder, or resident alien with foreign financial assets above certain thresholds, you are required to disclose those assets by filing Form 8938 with your annual tax return. FATCA is the law that created and enforces this requirement.

Level 2: Foreign financial institutions (FFIs). Banks, brokerages, investment funds, and similar institutions outside the US are required under FATCA to identify US account holders and report their account details to the IRS. Over 100 countries have entered into intergovernmental agreements (IGAs) with the US to facilitate this reporting. This means that even if you do nothing, your foreign bank may already be reporting your account to the IRS.

What does FATCA actually require you to report?

As an individual US taxpayer, FATCA requires you to disclose specified foreign financial assets if their aggregate value exceeds the applicable threshold. This is done through Form 8938, filed with your Form 1040.

The reportable assets include:

• Financial accounts held at foreign institutions (bank accounts, brokerage accounts, custodial accounts)
• Stock or securities issued by foreign corporations
• Interests in foreign partnerships, trusts, or estates
• Foreign-issued notes, bonds, or other debt instruments
• Any financial instrument or contract held for investment with a foreign counterparty

For startup founders, the most commonly overlooked category is equity in foreign companies. If your startup has a foreign holding company structure, or if you hold shares in an overseas entity as part of a deal or co-founding arrangement, those assets are within FATCA's scope.

Filing thresholds: Do you need to report?

FATCA reporting is triggered based on the total value of your foreign financial assets. The thresholds vary depending on your residency and filing status:

If the total value of your foreign financial assets crosses either threshold at any point during the year, you are required to file Form 8938. The higher thresholds for those living abroad reflect the reality that expats are more likely to maintain legitimate foreign accounts for everyday use.

How FATCA affects your foreign bank

Even if you choose not to report, FATCA has likely already flagged your accounts. Here is why.

Under FATCA, foreign banks and financial institutions that want to maintain access to the US financial system must agree to identify their US account holders and report account information, including balances, interest, dividends, and proceeds from asset sales, to the IRS. Institutions that do not comply face a 30% withholding tax on certain US-source payments.

As a result, most major international banks now ask new account holders whether they are US persons. If you are a US taxpayer with a foreign account, there is a very reasonable chance that the institution holding that account is already reporting it to the IRS, directly or through their local tax authority under an IGA arrangement.

This has a practical implication: non-disclosure is not the same as non-detection. The IRS cross-references FATCA data with individual tax returns. If a foreign bank reports an account you have not disclosed, that discrepancy will surface.

Real scenarios where FATCA catches founders off guard

Scenario 1: You have a foreign operating account

Your startup operates internationally and maintains a business bank account in Singapore, the UAE, or the UK for local payments and vendor relationships. Even if the account belongs to a corporate entity rather than you personally, if you have signature authority over it and its value exceeds $10,000 at any point, you may have separate reporting obligations under FBAR. If you have a financial interest and the value crosses the FATCA thresholds, Form 8938 may also apply.

Scenario 2: Your startup has a Cayman or BVI holding structure

Many venture-backed startups use a Cayman Islands or British Virgin Islands holding company as the top entity for fundraising purposes. As a founder holding equity in that foreign entity, the value of your interest is a specified foreign financial asset under FATCA. If it crosses the threshold, it must be disclosed.

Scenario 3: You moved to the US after starting a company abroad

You founded a company in India, Germany, Brazil, or elsewhere, then relocated to the US. You still hold equity in the original entity. The moment you became a US tax person, your foreign equity became subject to FATCA disclosure requirements. The timing of when assets were acquired does not exempt them from reporting once you are a US taxpayer.

Scenario 4: A foreign investor gave you an interest in their fund

As part of a strategic partnership or early-stage investment arrangement, you received a carried interest or co-investment stake in a foreign fund. Interests in foreign investment vehicles are reportable under FATCA if they meet the threshold.

FATCA vs. FBAR: Understanding the overlap

FATCA and FBAR (the Foreign Bank Account Report, filed as FinCEN Form 114) are often mentioned together because they overlap significantly. But they are separate obligations with different rules.

The key distinction is scope. FBAR covers foreign financial accounts only. FATCA covers a much broader set of assets, including equity and other ownership interests in foreign entities. If you have a foreign bank account, you may need to file both. If you hold equity in a foreign company but no foreign bank account, FATCA may apply while FBAR does not.

Having to file both forms for the same account is not double-jeopardy. The IRS requires both because they serve different compliance purposes and are administered by different agencies.

Penalties for non-compliance

FATCA's penalty structure is designed to be a strong deterrent.

• Failure to disclose: $10,000 per tax year in which a required Form 8938 was not filed
• Continued failure after IRS notice: Up to an additional $50,000
• Underpayment related to undisclosed foreign assets: A 40% accuracy-related penalty applies, double the standard 20%
• Extended statute of limitations: If Form 8938 is not filed, the IRS can assess tax for up to six years, rather than the standard three
• Criminal penalties: In cases of willful non-compliance, criminal prosecution is possible

The IRS does provide reasonable cause relief for certain failures, but the standard is meaningful. You need to demonstrate that the failure was not due to willful neglect and that you took affirmative steps to comply once the obligation was identified.

Common misconceptions

"My foreign bank account is small, so it doesn't count."
The FATCA thresholds apply to the aggregate value of all your foreign financial assets combined, not to each account individually. Multiple smaller accounts can collectively cross the threshold.

"My accountant handles everything, so I'm covered."
Only if you have told your accountant about every foreign account and foreign equity interest you hold. FATCA reporting depends on complete information. If you haven't disclosed a foreign holding to your preparer, it almost certainly isn't being reported.

"The account belongs to my company, not me personally."
Entity structure matters, but it doesn't automatically remove the obligation. If you have a financial interest in or signature authority over a foreign account, FBAR may apply regardless of how the account is titled. For FATCA purposes, equity interests in foreign entities held in your own name are reportable even if the underlying operations are conducted through a corporate structure.

"I already filed FBAR, so I'm done." FBAR and FATCA are separate filings. Filing one does not satisfy the other.

What you should do

1. Take stock of every foreign financial account and foreign equity interest you hold. Include accounts held in your name, accounts over which you have signature authority, and equity interests in foreign companies.

2. Determine whether the aggregate value crosses the applicable threshold. Use the thresholds for your filing status and residency. When in doubt, err on the side of disclosure.

3. Work with a tax professional who has international experience. FATCA intersects with a range of other international tax concepts including PFICs, controlled foreign corporations (CFCs), and subpart F income. A general CPA may not be equipped to handle this correctly.

4. Do not assume that prior-year non-compliance is undetectable. FATCA data from foreign banks goes back to 2014 for most institutions. The IRS has been actively working through that data.

5. If you missed prior years, consider a voluntary disclosure. The IRS has programs designed to bring non-compliant taxpayers into compliance with reduced penalties. Proactive disclosure is treated more favorably than a detected omission.

FATCA is not just a law for wealthy individuals hiding money offshore. It is a broad disclosure regime that applies to any US taxpayer with meaningful foreign financial assets, including startup founders with international company structures, overseas bank accounts, or equity in foreign entities.

The compliance burden is real, but it is manageable with the right guidance. What makes FATCA particularly important to take seriously is the detection risk. Foreign institutions are reporting to the IRS whether you file or not. The question is whether your tax return reflects what they are reporting.

Disclosure is the right approach, and the earlier it is addressed, the more options you have.