The Foreign Account Tax Compliance Act, usually shortened to FATCA, is a United States law that requires financial institutions around the world, including banks in Australia, to identify accounts held by US citizens and US tax residents and report them to the US Internal Revenue Service. It was enacted by the US in 2010 to stop Americans hiding money in offshore accounts to avoid US tax. Because the US taxes its citizens on their worldwide income no matter where they live, FATCA reaches far beyond America: an Australian bank must check whether its account holders are US persons and, if they are, report those accounts. In Australia this happens through an agreement between the two governments, so your bank reports to the ATO, and the ATO passes the information to the IRS. If you are a US citizen, a green card holder, or a US tax resident living in Australia, FATCA is the reason your Australian bank asks whether you have US tax obligations.
Why a US law affects Australian accounts
FATCA feels strange to a lot of Australians because it is a foreign law reaching into Australian banks. The reason it has that reach comes down to how the US taxes its people. Unlike almost every other country, the US taxes based on citizenship, not just residence. An American citizen living permanently in Melbourne still has US tax filing obligations, even if they have not set foot in the US for decades and owe no US tax. FATCA was the US response to the reality that some citizens were holding money offshore and not declaring it, and rather than chase individuals one by one, the US put the obligation onto the financial institutions that hold the money.
The enforcement mechanism is what gives FATCA its global teeth. A financial institution anywhere in the world that does not comply can face a 30% withholding tax on certain US-sourced payments to it. For a bank with any exposure to US markets, that penalty is severe enough that compliance is effectively compulsory. So banks across the world, including every significant Australian institution, fell into line and began identifying and reporting US account holders.
How FATCA works in Australia
Australia did not simply let US law operate directly on its banks. Instead, the two countries signed an intergovernmental agreement, usually called an IGA, in 2014, and Australia passed its own legislation to implement it. This is the key to understanding how FATCA runs here. Rather than Australian banks reporting directly to the IRS, they report to the ATO, and the ATO exchanges that information with the IRS under the existing tax treaty between the two countries, with its privacy and confidentiality protections.
In practice, this means an Australian bank or other financial institution must register with the IRS, review its accounts to identify any held or controlled by US persons, and lodge an annual FATCA report with the ATO covering those accounts. The ATO then transmits the data to the US. The result for an ordinary account holder is the question many Australians have seen when opening an account or updating their details: are you a US citizen or US tax resident? That question exists because of FATCA.
Who is a US person for FATCA purposes
The category FATCA cares about is broader than people expect, because US tax residency is broader than most assume. A US person includes US citizens, including dual citizens who also hold Australian citizenship, and people born in the US who may never have lived there as adults. It includes green card holders, who remain US tax residents until they formally give up the card, even while living in Australia. And it can include people who spend enough time in the US to meet its residency test.
This catches a lot of people by surprise. Someone born in the US to Australian parents and raised entirely in Australia is a US citizen and a US person for FATCA, often without realising it. A long-term green card holder who moved to Australia years ago and let the card lapse in practice may still be a US tax resident in the eyes of the IRS. Because the net is wide, the first useful step for anyone with a US connection is simply to work out whether they are a US person, because that status, not where you live, is what triggers both FATCA reporting and US tax obligations.
What gets reported
FATCA reporting is about accounts, not transactions. When a financial institution identifies a reportable account, it reports identifying information about the account holder, such as name, address, and US taxpayer identification number where held, along with the account number, the account balance or value, and income paid into the account such as interest and dividends. It is account-level information designed to let the IRS match what a US person holds abroad against what they have declared on their US return.
What FATCA does not do is assess or collect tax by itself. It is an information-reporting regime. The reported data allows the IRS to see that a US person holds an Australian account and to check it against that person’s US filings. Any US tax actually owed, and any US return required, is a separate matter governed by US tax law. FATCA is the visibility; the obligations it exposes sit under the broader US citizenship-based tax system.
FATCA and your Australian tax
A point worth being clear on is that FATCA does not change your Australian tax. If you live in Australia and are an Australian tax resident, you are taxed in Australia on your income in the normal way, and FATCA sits alongside that without altering it. Your Australian interest is still declared and taxed here as our guide on how interest on savings is taxed describes, whether or not you are also a US person.
What FATCA does is expose a separate, parallel set of US obligations for those who are US persons. A US citizen living in Australia generally has to file a US tax return each year reporting worldwide income, and may have additional US reporting such as the Report of Foreign Bank and Financial Accounts, known as the FBAR, which is separate from FATCA but aimed at similar information. Double tax is usually avoided through foreign tax credits and the tax treaty, so most Australian-resident US citizens end up owing little or no US tax, but the filing obligation remains even when nothing is owed. The trap is not usually extra tax; it is failing to file returns you did not know you had to.
CRS: the global version of the same idea
FATCA was so effective at prompting information exchange that the rest of the world built a multilateral version of it. The Common Reporting Standard, or CRS, developed by the OECD, applies the same basic model, with financial institutions identifying account holders who are tax residents of other participating countries and reporting them to their local tax authority for exchange. Australia participates in CRS, so Australian banks identify and report account holders who are tax residents of dozens of other countries, not just the US.
The practical effect is that automatic exchange of financial account information is now the global norm, not a US-only arrangement. FATCA handles the US; CRS handles most of the rest. For an Australian with accounts or tax residency ties in more than one country, both regimes can be relevant, and the account-opening questions about your tax residency in other countries come from CRS in the same way the US question comes from FATCA. For anyone with genuinely cross-border affairs, our business and tax advisers can help make sense of which regimes apply.
What FATCA means for you in practice
For most Australians with no US connection, FATCA means very little beyond ticking “no” to the US person question when they open an account. The reporting happens in the background between banks, the ATO, and the IRS, and it does not affect how their Australian income is taxed. There is nothing to do and nothing to worry about.
For a US person living in Australia, the picture is different and worth taking seriously. Your Australian accounts are being reported to the IRS, which means any gap between what you hold and what you have filed in the US is visible. If you are a US citizen or green card holder who has not been filing US returns, the sensible course is to get advice and bring your US filings up to date, because the information is already flowing and the cost of addressing it voluntarily is far lower than being found non-compliant. US tax filing itself is specialist work usually handled by a US-qualified preparer, but your Australian accountant can help you understand your Australian position, report your Australian income correctly, and coordinate the two sides so nothing falls through the gap.
FATCA and businesses, not just individuals
FATCA is not only about individual bank accounts. It also reaches entities, which matters for business owners, trustees, and anyone involved with a company or trust. When a business opens an account, the financial institution has to work out what kind of entity it is and, in some cases, look through it to its controlling persons. The concern is that a US person could hold assets through an Australian company or trust rather than in their own name, so FATCA requires institutions to identify entities that are effectively vehicles for US persons and report the US controlling individuals behind them.
In practice, an Australian trading company with ordinary Australian owners has little to worry about beyond answering the entity classification questions on account forms. But a passive investment entity, one whose income is mostly passive investment returns, can be looked through to its controlling persons, and if any of those are US persons, the account becomes reportable. This is why business account opening now involves questions about the entity’s type and sometimes about the tax residency of its controllers. If you run a company or trust and are unsure how it is classified, our guide on what your accountant needs for your business tax return covers the records that help, and we can help you answer the classification questions correctly.
What happens if your status cannot be confirmed
Financial institutions are required to make reasonable efforts to establish whether an account holder is a US person, and that is why they sometimes chase customers for information. If a bank has indicators that an account holder might be a US person, a US birthplace, a US address, or a US phone number on file, for example, it may ask for documentation to confirm the position one way or the other. These are called US indicia, and they trigger follow-up rather than an automatic conclusion.
If an account holder does not respond and the bank cannot resolve the question, the account can end up being treated as reportable anyway, on the basis of the indicators the bank holds. So ignoring a bank’s request for information does not keep you out of the system; it can simply mean your account is reported without your input. The better approach, if your bank contacts you about your status, is to respond and provide what is needed, whether that confirms you are not a US person or establishes that you are and should be getting your US filings in order. Either outcome is better handled than left unresolved.
Answer the bank’s question honestly
One small but important point: when a bank asks whether you are a US person, answer it accurately. The question is not an intrusion the bank invented; it is a legal obligation under FATCA, and giving a false answer to avoid reporting is both ineffective, because the information often surfaces anyway, and a problem in itself. If you are unsure whether you count as a US person, that uncertainty is worth resolving with advice rather than guessing, because the answer determines whether a whole parallel set of obligations applies to you.
If your affairs are entirely Australian, the question is a formality. If you have a US birthplace, a US passport, a green card, or significant US ties, it is a prompt to check your position properly. Getting your Australian tax right is the part we can help with directly, and our team can prepare and lodge your Australian return and point you to the right US specialist where a US obligation exists.
