CRS and AEOI: Automatic Exchange of Financial Information Explained

The era of financial privacy through offshore accounts is over for the vast majority of taxpayers in developed countries. The Common Reporting Standard (CRS) and the broader framework of Automatic Exchange of Information (AEOI) have fundamentally changed the information available to tax authorities worldwide. Understanding exactly what is reported, to whom, and under what framework helps internationally mobile individuals and investors manage their affairs with full legal compliance — and without confusion about what their obligations actually are.

What Is AEOI?

Automatic Exchange of Information is the umbrella term for frameworks under which countries share financial account information with each other without waiting for a specific request. The "automatic" element distinguishes it from earlier exchange-on-request models, where a tax authority had to identify a specific individual and make a specific request to a foreign government — a process that was slow, bilateral, and generally ineffective against widespread non-compliance.

AEOI was driven by the OECD (Organisation for Economic Cooperation and Development) and received decisive political momentum following the US Foreign Account Tax Compliance Act (FATCA), passed in 2010, and the revelation of large-scale offshore tax non-compliance. The G20 and OECD developed the global CRS framework, which came into effect for early-adopting countries in 2016–2017.

What Is CRS?

The Common Reporting Standard (CRS) is the international standard for the automatic exchange of financial account information between tax authorities. It was developed by the OECD and published in 2014.

Under CRS:

1. Financial institutions in participating countries collect information about account holders who are tax-resident in other CRS-participating countries.
2. They report that information annually to their own domestic tax authority.
3. That domestic tax authority automatically transmits the information to the tax authority of the account holder's country of tax residence.

The result: if you are UK tax-resident and hold a bank account in Switzerland, the Swiss bank reports your account details to the Swiss tax authority (ESTV), which forwards that information to HMRC. HMRC then has account-level detail without having to make any specific request.

Who Participates in CRS?

As of 2026, over 100 jurisdictions participate in CRS, including:

• All EU member states
• Switzerland
• The UK
• The Channel Islands (Jersey, Guernsey)
• The Isle of Man
• Singapore
• The UAE
• Australia, Canada, New Zealand
• Most Caribbean financial centres (Cayman Islands, British Virgin Islands, Bermuda, Bahamas)
• Many Asian, African, and Latin American jurisdictions

The US does not participate in CRS as a reporter (it has its own framework, FATCA, described below). However, the US does receive information under reciprocal FATCA arrangements, and most CRS-participating countries receive information from the US under FATCA.

Notable non-participants include a small number of jurisdictions that are not OECD or G20 members, though this list has shrunk considerably as pressure for compliance has grown.

The full list of participating jurisdictions is published by the OECD and updated regularly. Always verify current participation when making banking decisions.

What Information Is Reported Under CRS?

The CRS reports the following information for each qualifying financial account:

• Name and tax identification number of the account holder
• Address and country(ies) of tax residence
• Account number
• Account balance or value at year-end
• Gross interest, dividends, and other income credited during the year
• Gross proceeds from sales of financial assets

For accounts held by entities (companies, trusts, foundations), the information extends to the controlling persons — the beneficial owners.

Not all accounts are reportable. Lower-value accounts held by residents of the same jurisdiction (domestic accounts) are generally not subject to CRS reporting; CRS targets non-resident account holders. However, the definition of "non-resident" and the thresholds for inclusion vary by jurisdiction.

FATCA: The US Framework

The US Foreign Account Tax Compliance Act (FATCA), enacted in 2010, preceded CRS and operates differently. Key characteristics:

• US persons are subject to FATCA wherever in the world they hold financial accounts. "US persons" includes US citizens (including those with dual nationality), US residents, holders of US green cards, and certain US entities.
• Non-US financial institutions report on US persons' accounts to the IRS (directly or through their home government under an Intergovernmental Agreement, or IGA).
• FBAR (FinCEN 114) is a separate US requirement — a report of Foreign Bank and Financial Accounts — required of US persons holding foreign accounts with aggregate balances exceeding $10,000 at any point during the year. FBAR failure penalties are severe.
• PFIC rules — US persons holding non-US funds (including most non-US unit trusts and ETFs) face punitive tax treatment under the Passive Foreign Investment Company rules. This creates significant practical complexity for US persons holding investments outside the US.

US persons living outside the United States face significant and specific complexity around offshore accounts. Dedicated specialist advice from a dual-qualified US/UK (or US/other) tax professional is essential for this group.

What CRS Means Practically for International Investors

Tax authorities know about your offshore accounts. If you are UK tax-resident and hold accounts in any CRS-participating jurisdiction, HMRC receives annual information. The same applies for French, German, Australian, and Canadian residents with offshore accounts in CRS jurisdictions.

Non-disclosure is not viable. Strategies that depend on tax authorities not knowing about foreign accounts are not sustainable in the CRS era. The correct approach is full disclosure combined with effective, legitimate tax planning.

CRS does not mean you owe tax on offshore accounts. Holding assets offshore does not create a tax liability per se. The liability depends on your tax residency, domicile, the type of income or gain, and the applicable rules of your home jurisdiction. CRS makes it more important to understand and comply with those rules, not more likely that you owe unexpected tax.

Legitimate offshore planning remains valid. Structuring wealth efficiently across jurisdictions — using offshore investment bonds, trust structures, tax-treaty provisions, and appropriate residency arrangements — remains legal and potentially valuable. The distinction is between legal tax planning (which CRS does not affect) and illegal non-disclosure (which CRS makes difficult to sustain).

Self-Certification and Bank Obligations

When opening any bank account or investment account internationally, you will be required to complete a CRS self-certification form. This is a legally binding declaration in which you confirm:

• Your country(ies) of tax residence
• Your tax identification number(s) in each country of tax residence
• That the information is correct to the best of your knowledge

Banks are obliged to review your self-certification and may request supporting evidence if the declaration appears inconsistent with other information they hold. Providing false information on a CRS self-certification is a criminal offence in most jurisdictions.

If your tax residency changes, you are required to notify your financial institutions so they can update your CRS reporting status. This includes becoming tax-resident in a new country, ceasing to be tax-resident in your previous country, or any other material change.

Multiple Tax Residencies

Some internationally mobile individuals are tax-resident in more than one jurisdiction simultaneously, under the domestic laws of each country, though double taxation treaties often provide tie-breaker rules. If you have genuine dual tax residency, both countries may receive CRS reports for your accounts in third countries, and both may have tax claims on your income or assets.

Resolving conflicting tax residencies requires professional advice. Claiming a residency you do not genuinely hold in order to avoid tax in your actual country of residence is both illegal and detectable through CRS mechanisms.

CRS and Non-Dom Clients

Prior to April 2025, UK non-domiciled individuals could elect to pay UK tax only on income and gains remitted to the UK (the remittance basis). Offshore assets were often not reported to HMRC on the basis that they would not be remitted. The UK's non-dom regime was significantly reformed with effect from April 2025. If non-dom status and the remittance basis were relevant to how you managed your offshore accounts, obtain updated professional advice on your position under the new rules.

The OECD's Future Direction

The OECD continues to develop AEOI standards beyond financial accounts. The Crypto-Asset Reporting Framework (CARF), published in 2023, extends automatic reporting to crypto-asset accounts and transactions. Implementation timelines vary by jurisdiction, but major financial centres have committed to adoption. If you hold crypto assets, expect similar transparency to apply to those holdings as currently applies to conventional financial accounts.

Practical Steps for Full Compliance

1. Ensure all foreign accounts are declared on your domestic tax return. In the UK, this means disclosing foreign bank accounts and investment accounts on the self-assessment return, along with any income and gains arising.

2. Obtain and keep tax reference numbers for all jurisdictions of tax residence. Banks will require them for CRS self-certification.

3. Review your self-certification accuracy whenever your tax residency changes.

4. Seek professional advice if you are uncertain about the interaction between CRS reporting and your tax obligations — particularly if you have multiple residencies, complex offshore structures, or are a US person.

5. Consider voluntary disclosure if you have historical undeclared offshore accounts or income. HMRC's statutory disclosure facility and equivalent programmes in other jurisdictions typically offer better outcomes than waiting for information to be received through CRS reporting.

How Global Investments Can Help

Global Investments supports internationally mobile clients who need to manage the complexity of multiple tax residencies, offshore account reporting, and the interaction between CRS and their overall financial planning. We work alongside specialist tax advisers to ensure that clients' financial arrangements are both legally compliant and efficiently structured.

We can help review offshore account structures, ensure CRS self-certifications are accurate, and identify where professional tax advice is needed to resolve specific questions about reporting obligations.

CRS frameworks, participating jurisdictions, and tax rules change. This guide reflects the position as of 2026 and is for general information purposes only. Do not rely on it as tax, legal, or financial advice. Seek professional guidance tailored to your individual circumstances.