CRS and FATCA: What Expats Must Know About Automatic Tax Reporting

When the Common Reporting Standard was introduced in 2014 and began exchanging data in 2017, it marked the effective end of financial privacy for internationally mobile individuals. The days when holding money in an offshore account meant it was invisible to your home country tax authority are gone. Today, over 100 countries automatically exchange account information — and HMRC, together with tax authorities around the world, receives annual reports on the offshore accounts of their residents and citizens.

Understanding exactly what is reported, what it means for your tax obligations, and what to do if you have not been fully compliant is not optional. The penalties for offshore non-disclosure are severe, and the automatic nature of reporting means that HMRC does not need to investigate to find out about undeclared offshore income — the information arrives on their systems annually.

The Common Reporting Standard — how it works

The CRS was developed by the OECD and endorsed by the G20. It creates a single global standard for automatic exchange of financial account information between tax authorities. The mechanics are straightforward: financial institutions (banks, investment managers, insurers, and certain other entities) in participating jurisdictions identify account holders who are tax-resident in another jurisdiction, collect their details, and report them annually to their local tax authority. That authority then passes the data to the account holder's country of tax residence.

The CRS applies to a wide range of financial accounts: bank accounts (current and savings), custodial accounts (holding securities), certain insurance products with a cash or investment value, and equity or debt interests in certain entities. It does not, generally, apply to direct holdings of real property — though income from that property (if held through a financial account) may be captured.

What gets reported:

• Account holder identity: name, address, jurisdiction(s) of tax residence, tax identification number(s), date of birth, place of birth
• Account details: account number, name and identifying number of the reporting institution
• Account balance or value at year end
• Income: for custodial accounts — interest, dividends, and other income; for other accounts — interest credited
• Gross proceeds: from the sale or redemption of financial assets during the reporting period

The report is filed by the financial institution to its own government, which then transmits it to the relevant foreign tax authority. For UK residents, this means HMRC receives this data from over 100 countries.

CRS participating jurisdictions

As of 2026, over 100 jurisdictions participate in CRS automatic exchange. This includes all the major offshore banking centres used by internationally mobile UK expats:

• Isle of Man — participating since 2016 (first exchanges 2017)
• Channel Islands (Jersey and Guernsey) — participating since 2016
• Cyprus — EU member; participating since 2017
• Gibraltar — participating since 2017
• Malta — EU member; participating since 2016
• Singapore — participating since 2018
• Hong Kong — participating since 2018
• Dubai / UAE — the UAE joined CRS and began exchanges from 2018
• Cayman Islands — participating since 2017
• Bermuda, British Virgin Islands, Bahamas — all participating

The notable exception is the United States, which has its own regime (FATCA) rather than CRS. However, the practical effect for US persons worldwide is similar.

What CRS means for expats in practice

If you hold an offshore bank account, investment account, or investment-linked insurance policy outside your country of tax residence, the account is almost certainly being reported to your home country tax authority annually. You should assume HMRC (or your home country equivalent) already knows about it.

The obligation to declare offshore income does not depend on whether you have been reported under CRS. The obligation is independent — you are required to report the income regardless of CRS. CRS simply means that HMRC now has independent data to cross-reference against your tax return.

If your tax return correctly declares all offshore income, CRS creates no problem. If it does not, HMRC is in possession of evidence of undeclared income.

FATCA — the US global reporting regime

FATCA was enacted in 2010 and is a US-specific overlay that runs parallel to (but independently of) CRS. It applies to US persons: US citizens (regardless of residence), US green card holders, and certain US residents.

Under FATCA, foreign financial institutions worldwide are required to identify accounts held by US persons and report them to the IRS. Institutions that fail to comply face a 30% withholding tax on US-source payments — a powerful incentive to comply. As a result, virtually every significant bank in the world participates in FATCA, and US persons holding offshore accounts should expect their accounts to be reported to the IRS.

US reporting obligations for offshore accounts:

• FinCEN 114 (FBAR): Filed annually with the Financial Crimes Enforcement Network if the aggregate value of all foreign financial accounts exceeded USD 10,000 at any point during the year. Due 15 April each year (auto-extended to 15 October).
• IRS Form 8938: Filed with your US tax return if foreign financial assets exceed USD 50,000 on the last day of the year or USD 75,000 at any point during the year (higher thresholds for those living outside the US).

FATCA penalties for non-filing are severe: a base penalty of around USD 10,000 per FBAR (the statutory figure is adjusted annually for inflation) for non-wilful violations — assessed per annual report rather than per account, following the US Supreme Court's decision in Bittner v. United States (2023); up to the greater of USD 100,000 or 50% of the account balance per year for wilful violations. The IRS has pursued criminal cases against US persons for systematic non-compliance.

Penalties for offshore non-disclosure in the UK

HMRC takes offshore non-compliance seriously. The penalty regime for offshore matters is more punitive than for domestic matters:

Offshore non-disclosure penalties:

• Standard: 30–200% of the unpaid tax, depending on jurisdiction category and whether the behaviour was prompted or unprompted
• Deliberate and concealed: up to 200% of unpaid tax, with a minimum floor
• Asset-based: for serious cases, HMRC can apply an additional asset-based penalty
• Named and shamed: HMRC publishes names of those with offshore liabilities above a threshold

HMRC has used data received under CRS and FATCA to identify taxpayers with offshore income and assets not declared on their tax returns. The Connect intelligence system cross-references HMRC data with information from financial institutions, Land Registry, Companies House, and other sources. The chance of systematic offshore non-disclosure going undetected is low.

Regularising undeclared offshore accounts

If you have offshore accounts or income that has not been declared, voluntary disclosure is the correct course of action. The later you leave it, the higher the penalties.

HMRC's Contractual Disclosure Facility (CDF) / Code of Practice 9 (COP9): Used in cases where HMRC believes there has been significant tax fraud. Under COP9, HMRC offers immunity from criminal prosecution in exchange for full and complete disclosure. The taxpayer admits fraud and cooperates fully. This is appropriate for serious and systematic non-compliance.

HMRC's offshore disclosure mechanisms: For less severe non-disclosure, HMRC runs voluntary disclosure campaigns and accepts disclosures through its digital platform. Unprompted disclosures — where the taxpayer comes forward before HMRC makes contact — attract lower penalty rates than prompted disclosures.

The foreign income and assets disclosure: Where undeclared offshore income is relatively minor (e.g. small amounts of bank interest that were simply overlooked), an amendment to a self-assessment return or a written disclosure to HMRC may be appropriate, with interest and a reduced penalty.

In all cases, specialist tax advice from an adviser experienced in offshore compliance matters is essential before making any disclosure. The form of disclosure, the narrative provided, and the calculation of the liability all require professional input.

How Global Investments can help

We work with internationally mobile clients to ensure their banking arrangements are fully disclosed and compliant. Where a client has questions about their offshore reporting obligations, we co-ordinate with specialist tax counsel experienced in CRS, FATCA, and HMRC offshore compliance. We do not provide tax advice directly, but we work alongside your tax advisers and can recommend appropriate specialists where needed.

The correct approach to offshore banking is simple: open the accounts you need, in the jurisdictions that serve your financial objectives, and declare them fully to your tax authority. Offshore banking is a legitimate and powerful tool for internationally mobile individuals — it requires compliance, not secrecy.

This guide is for general information only and does not constitute tax or financial advice. CRS and FATCA rules change, and penalties for non-compliance are substantial. Always seek advice from a qualified tax adviser before making any decisions about offshore accounts or disclosures.