What Is Automatic Exchange of Information (AEOI)?
Automatic Exchange of Information (AEOI) is a tax transparency mechanism under which authorities share predefined financial and income data at regular intervals without prior request.
Also known as: AEOI, Automatic exchange of financial account information.
How Automatic Exchange of Information (AEOI) works
Automatic Exchange of Information operates when financial institutions or other reporting bodies supply predefined data on account holders resident abroad to their local tax authority, which then transmits the data periodically to the authority of the country of residence without any request, allowing that country to match foreign income and assets against tax returns. Within the European Union, Directive 2011/16/EU on administrative cooperation defines automatic exchange as the systematic communication of predefined information without prior request at pre-established regular intervals, and originally covered categories such as employment income, director's fees, certain life insurance products, pensions and immovable property. Directive 2014/107/EU extended the scheme to financial account information under due diligence and reporting rules fully consistent with the OECD Common Reporting Standard (CRS), applicable from 1 January 2016 in most Member States, with exchanges made annually within nine months following the end of the calendar year. The United States relies on a separate regime, the Foreign Account Tax Compliance Act (FATCA), under which foreign financial institutions generally report on assets held by US account holders or face withholding on certain payments, often under intergovernmental agreements with partner countries. Which accounts are reportable, which residence indicators institutions apply and which partner jurisdictions receive data depend on each country's implementing law and exchange relationships, so coverage is not uniform and remains subject to local rules.
Automatic Exchange of Information (AEOI) vs Exchange of Information on Request
Unlike exchange of information on request, which requires one tax authority to ask another for specific information about an identified taxpayer, Automatic Exchange of Information transfers predefined data in bulk at regular intervals without any prior request.
| Automatic Exchange of Information (AEOI) | Exchange of Information on Request | |
|---|---|---|
| Trigger | No request; data flow under a standing legal framework such as the DAC, CRS agreements or FATCA | A specific request from one tax authority, usually linked to an audit or enquiry |
| Scope of data | Predefined categories, such as financial account balances and income, for all reportable account holders | Information foreseeably relevant to an identified taxpayer or case |
| Timing | Periodic, for example annually within nine months after the calendar year under EU rules | Case by case, within deadlines set by the applicable treaty or agreement |
Example
Illustrative example: A software developer who is tax resident in Country A keeps a savings account and a brokerage account with banks in Country B, an EU Member State, after moving away from Country B. When updating the accounts, the developer gave each bank a self-certification of tax residence, so both banks classify the accounts as held by a Country A resident. Each year, the Country B banks report the account balances, interest, dividends and sale proceeds to the Country B tax authority, which passes the data to Country A within the applicable timetable, illustratively within nine months after the end of the calendar year under the EU rules. The Country A tax authority can then compare the foreign income with the developer's return; undeclared interest or dividends may prompt an enquiry, while correctly reported foreign income and any foreign tax credit claim would generally align with the exchanged data. If the developer later becomes resident in Country C and updates the self-certification, the accounts would generally be reported towards Country C instead, provided Country B has an exchange relationship with Country C.
Common misconception
Myth: Accounts held with online banks or brokers outside the home country stay invisible to the home tax authority unless that authority sends a specific request.
Reality: Under Automatic Exchange of Information, participating financial institutions generally report accounts of foreign-resident holders each year, and the data reach the residence country's tax authority without any request.
Frequently asked questions
What is automatic exchange of information?
Automatic Exchange of Information is the periodic transfer of predefined taxpayer data, such as financial account balances and income, between tax authorities without a prior request, mainly under the OECD Common Reporting Standard and, for the United States, FATCA.
What information is shared under CRS?
Under the Common Reporting Standard, financial institutions generally report the account holder's identity details, jurisdiction of residence and tax identification number, the account balance or value, and income such as interest and dividends, subject to local implementing rules.
Does automatic exchange of information apply to US accounts?
The United States exchanges financial account information mainly through FATCA and its intergovernmental agreements rather than the Common Reporting Standard, so the data sent by the United States to partner countries can differ in scope from CRS exchanges.
When is information exchanged under AEOI?
Timing depends on the framework; under EU Directive 2014/107/EU, financial account information is exchanged annually within nine months following the end of the calendar year to which the information relates.
Related terms
- Exchange of Information on Request — Request-based exchange often confused with AEOI
- Common Reporting Standard (CRS) — Main global standard for automatic account exchange
- FATCA (Foreign Account Tax Compliance Act) — US regime for reporting accounts of US persons
- Directive on Administrative Cooperation — EU legal basis for automatic exchange
- Reportable Account — Accounts whose data institutions must report
Related guides
- Digital nomad tax setups guide — Multi-country setups whose accounts are reported
- Accounting and bookkeeping for digital nomads — Record-keeping to match exchanged account data
- Global tax reform and US digital nomads — US context including FATCA reporting
Sources
- EUR-Lex: Council Directive 2011/16/EU (DAC)
- EUR-Lex: Council Directive 2014/107/EU (DAC2)
- IRS: Foreign Account Tax Compliance Act (FATCA)
Last verified: 2026-10-08. This entry is general information, not tax or legal advice; rules vary by country and change over time.
