FBAR Direct prepares and files your FBAR (FinCEN Form 114) on your behalf. You must review all details for accuracy before we submit to FinCEN. This article is for general guidance only and does not constitute tax, legal, or financial advice.

FBAR UK Bank Accounts: What US Persons Must Report

Tens of thousands of Americans hold bank accounts in the United Kingdom. Some are expats working in London or Manchester. Others are dual US-UK citizens who grew up with Barclays or Lloyds accounts. Others inherited ISAs or building society accounts from British relatives.

These accounts trigger FBAR filing. FBAR UK bank accounts — covered by the Report of Foreign Bank and Financial Accounts (FinCEN Form 114) — must be reported to FinCEN. Under 31 CFR 1010.350, any US person with a financial interest in or signature authority over foreign accounts must file. The threshold is $10,000 in total value at any point during the tax year.

UK accounts carry a specific risk. The US and the UK signed a FATCA Intergovernmental Agreement (IGA) in 2014. Under this deal, HMRC collects data from UK banks and sends it to the IRS every year. If you skip the FBAR, the IRS may already have records showing the accounts you failed to report.

Which FBAR UK Bank Accounts Are Reportable?

The FBAR UK bank accounts rule casts a wide net. Under 31 CFR 1010.350(c), "financial account" covers bank accounts, securities accounts, and other accounts held at foreign banks. You must report most UK accounts. This includes current accounts, savings accounts, ISAs, building society accounts, NS&I products, pensions, and brokerage accounts.

Here is a breakdown of the most common UK account types and their FBAR status.

Current Accounts and Savings Accounts

Every UK current account (checking account) and savings account at a UK bank is reportable. This includes accounts at:

• Barclays
• HSBC UK
• Lloyds Banking Group
• NatWest
• Santander UK
• Metro Bank
• Monzo, Starling, and other digital banks

The bank type does not matter. High-street banks, challenger banks, and online-only banks all count as foreign banks under the FBAR rules.

Individual Savings Accounts (ISAs)

ISAs are tax-free under UK law. However, the ISA wrapper does not change your US reporting duties. All ISA types must appear on the FBAR:

• Cash ISAs: Report the maximum cash balance during the year.
• Stocks and Shares ISAs: Report the peak portfolio value, including all holdings.
• Lifetime ISAs (LISAs): Report the full account value, including government bonuses.
• Innovative Finance ISAs: Report the total value of your peer-to-peer lending holdings.

A Cash ISA holding £18,000 converts to about $22,680 at a 1.26 GBP/USD rate — well above the $10,000 FBAR threshold on its own.

If you hold both a Cash ISA and a Stocks and Shares ISA, report each one on its own FBAR entry. List the bank, account number, and peak value for each.

Building Society Accounts

UK building societies — Nationwide, Yorkshire, Coventry, Skipton, and others — are foreign banks under the Bank Secrecy Act. Any savings account, fixed-rate bond, or regular saver at a building society is a foreign account. These accounts often hold £50,000 or more ($63,000+ USD), far above the $10,000 threshold.

NS&I (National Savings & Investments)

NS&I is backed by HM Treasury, but its accounts are foreign accounts for FBAR purposes. You must report these NS&I products:

• Premium Bonds: Report the face value of your bond holdings, not the prize value.
• Direct Saver: Report the maximum balance during the year.
• Income Bonds: Report the maximum balance.
• Green Savings Bonds: Report the face value of the holding.

NS&I Premium Bonds are often missed. Dual US-UK citizens may hold bonds bought years ago without knowing they trigger a filing duty.

UK Pension Accounts

UK pension accounts are one of the harder areas of FBAR reporting. The IRS has not issued clear guidance on every pension type.

Self-Invested Personal Pensions (SIPPs): Reportable. You direct the investment choices, so a SIPP counts as a financial account. Report the total value including all holdings.

Workplace Pensions (Defined Contribution): Reportable if you can choose or change your funds. Report the full account value.

Defined Benefit Pensions (Final Salary): The rules are unclear. Most tax pros exclude them from the FBAR because there is no account balance you can direct. Consult a qualified expert for your case.

State Pension: Not reportable. The UK State Pension is a government benefit, not a financial account.

UK Brokerage and Investment Accounts

Any account at a UK broker or investment platform where you hold securities must appear on the FBAR. Common UK platforms include:

• Hargreaves Lansdown
• AJ Bell
• Interactive Investor
• Vanguard UK
• Freetrade

Report the peak portfolio value during the year. This includes stocks, bonds, funds, ETFs, and any cash balance in the brokerage account. If you hold both a general account and an ISA at the same platform, report each one on its own.

How Do You Convert GBP to USD for FBAR Reporting?

To convert GBP to USD for FBAR reporting, use the US Treasury's end-of-year exchange rate. Apply this rate to the peak GBP balance of each UK account during the year. Do not use the spot rate on the date of the peak balance or a yearly average rate. The December 31 Treasury rate is the only accepted method for FBAR currency conversion.

For the 2025 FBAR, use the Treasury's December 31, 2025 rate from the Treasury Exchange Rates page. The December 31, 2024 rate was 1 GBP = 1.2535 USD — verify the current year's rate before filing.

How the Conversion Works

1. Find the maximum GBP balance of each UK account during 2025.
2. Look up the Treasury's December 31, 2025 rate.
3. Multiply each balance by that rate.
4. Sum all converted values to get the aggregate maximum.

Conversion Example

Sarah holds three UK accounts:

• Lloyds current account: peak balance of £8,500
• Nationwide ISA: peak balance of £25,000
• NS&I Premium Bonds: £10,000 face value

Using a Treasury rate of 1 GBP = 1.26 USD:

• Lloyds: £8,500 × 1.26 = $10,710
• Nationwide ISA: £25,000 × 1.26 = $31,500
• NS&I Premium Bonds: £10,000 × 1.26 = $12,600

Aggregate maximum value: $54,810. Sarah must file an FBAR reporting all three accounts. For more detail on calculating maximum values, see our guide on how to calculate maximum account value for your FBAR.

Why Does the US-UK FATCA Agreement Mean the IRS Already Knows About Your Accounts?

The US-UK FATCA Agreement means the IRS already knows about your UK accounts. HMRC shares account data with the IRS each year. UK banks report US-person account balances and income to HMRC, which then sends the data to the IRS. No audit is needed — the IRS already holds records of your UK accounts before you file anything.

What UK Banks Report to HMRC

Under the Model 1 FATCA Intergovernmental Agreement signed in 2012 and updated in 2014, UK banks must report the following for each account held by a US person:

• Account holder name, address, and US taxpayer ID number (SSN or ITIN)
• Account number
• Account balance or value at year-end
• Interest, dividends, and other income paid to the account
• Gross proceeds from sales of financial assets

What This Means for FBAR Non-Filers

If you hold UK accounts and do not file the FBAR, the IRS has two sources of information pointing to a violation:

1. FATCA data from HMRC showing the accounts exist and their balances.
2. The absence of your FBAR in FinCEN's BSA E-Filing system.

Matching these two data sets is simple for the IRS. The penalty for a non-willful failure to file is up to $16,117 per violation under 31 USC 5321(a)(5)(B)(i) (2026 adjusted amount). The Supreme Court ruled in United States v. Bittner (2023) that non-willful penalties apply per report, not per account. A single missed year is one violation.

Willful violations carry far harsher penalties. The maximum is the greater of $129,210 or 50% of the account balance under 31 USC 5321(a)(5)(C). The DOJ has charged willful FBAR violations as crimes. Criminal penalties reach $250,000 and five years in prison under 31 USC 5322.

The FATCA IGA removes any privacy shield for UK accounts. Filing your FBAR is not optional when the IRS already has the data to check your compliance.

Common Scenarios for US Persons With UK Accounts

US persons with UK accounts fall into three groups: expats working in the UK, dual citizens who have held accounts since childhood, and US residents who inherited UK accounts. Each case triggers FBAR filing. The examples below show how the total threshold applies.

Scenario 1: American Expat Working in London

James is a US citizen who moved to London in 2022 for work. He opened a Barclays current account, a Vanguard UK Stocks and Shares ISA, and enrolled in his employer's workplace pension. His account values in 2025:

• Barclays current account: peak £12,000 ($15,120)
• Vanguard UK ISA: peak £45,000 ($56,700)
• Workplace pension (defined contribution): balance £28,000 ($35,280)

Aggregate maximum: $107,100. James must file an FBAR for 2025 under 31 CFR 1010.350, reporting all three accounts. He should also check Form 8938 (FATCA), which has a higher threshold for expats but may still apply.

James also holds a Chase checking account in the US. Domestic accounts do not appear on the FBAR.

Scenario 2: Dual US-UK Citizen

Emily is a dual US-UK citizen who has lived in the UK since childhood. She has a Lloyds savings account, NS&I Premium Bonds, and a Cash ISA at Nationwide. All three were opened when she was a teenager.

• Lloyds savings: peak £6,200 ($7,812)
• NS&I Premium Bonds: £15,000 face value ($18,900)
• Nationwide Cash ISA: peak £9,500 ($11,970)

Total peak value: $38,682. Emily must file an FBAR. Dual citizens like Emily often have never filed because they did not know about the rule.

If Emily has missed prior years, the Streamlined Filing Compliance Procedures are the most common remedy. For a detailed overview of penalty exposure, see our article on FBAR penalties and what happens if you do not file.

Scenario 3: US Person Who Inherited UK Accounts

David is a US citizen living in Ohio. His British grandmother passed away in 2024 and left him £40,000 in a Skipton Building Society account and £20,000 in NS&I Income Bonds.

• Skipton Building Society: peak £40,000 ($50,400)
• NS&I Income Bonds: peak £20,000 ($25,200)

Aggregate maximum: $75,600. David must file an FBAR for 2025 under 31 CFR 1010.350 — the first full calendar year he holds the accounts. The FBAR obligation began the moment David had a financial interest in the accounts.

Inherited accounts catch US persons off guard. The inheritance itself may not be taxable in the US, but gifts or bequests over $100,000 from a foreign person may require a Form 3520 filing. The FBAR duty is separate and applies every year the accounts stay open.

How to Report Specific UK Account Types

To report UK accounts on the FBAR, you enter the bank name, account number, account type, and peak value in USD. The steps are similar for ISAs, building society accounts, NS&I products, and UK pensions. Each type has a few quirks. The sections below walk through the most common types.

Reporting ISAs

For an ISA, enter:

• Financial Institution: The ISA provider (e.g., "Nationwide Building Society" or "Hargreaves Lansdown")
• Account Number: Your ISA account number or client reference
• Account Type: "Other" with description "Individual Savings Account (ISA)" — or "Bank" for a Cash ISA
• Maximum Value: The peak value of the ISA during the year, converted to USD

Report the ISA wrapper account. You do not list each stock or fund held inside a Stocks and Shares ISA — the FBAR tracks the account, not the assets within it.

Reporting NS&I Premium Bonds

Premium Bonds have no changing balance — you hold them at face value. Report the total face value in USD as the peak value.

• Financial Institution: "National Savings & Investments (NS&I)"
• Account Number: Your NS&I holder's number
• Maximum Value: Total face value of Premium Bonds held, converted to USD

Prize winnings do not increase the FBAR value — they are separate income events.

Reporting Building Society Accounts

Report building society accounts the same way as standard bank accounts. Enter the society name, your account or roll number, "Bank" for savings accounts (or "Other" for fixed-rate bonds), and the peak balance in USD.

Reporting UK Pensions (SIPPs)

For a SIPP, enter the pension provider name (e.g., "AJ Bell"), your SIPP account reference, account type "Other — Self-Invested Personal Pension (SIPP)", and the peak total pension value converted to USD.

When Is the FBAR Deadline, and What Happens If You Miss It?

The FBAR for 2025 is due on April 15, 2026. If you miss that date, you get an auto extension to October 15, 2026 under 31 CFR 1010.306(c). You do not need to ask for this extension — it applies to all filers. FinCEN does not charge a late fee between April 15 and October 15. After October 15, penalties may apply.

For full deadline details, see our article on the 2026 FBAR filing deadline.

The FBAR and Form 8938: Two Separate Filings

US persons with UK accounts often need to file both the FBAR and Form 8938. The FBAR goes to FinCEN while Form 8938 goes to the IRS with your tax return. They have different dollar thresholds, cover slightly different assets, and carry separate penalties. Filing one does not exempt you from the other. If your UK accounts push you above both limits, you must submit both reports for the same tax year.

	FBAR (FinCEN Form 114)	Form 8938
Filed with	FinCEN (via BSA E-Filing)	IRS (attached to tax return)
Threshold (domestic filers)	$10,000 aggregate	$50,000 on last day or $75,000 at any time
Threshold (expats, filing jointly)	$10,000 aggregate	$400,000 on last day or $600,000 at any time
Penalties	Up to $16,117 non-willful; up to 50% willful	Up to $10,000 for failure to file

Expats with UK accounts often exceed both thresholds. Filing one does not satisfy the other — you must file both reports. For a full comparison, see our article on FBAR vs. Form 8938 differences.

What Options Do First-Time Filers and Late Filers Have?

If you have UK accounts and have never filed an FBAR, you are not alone. The IRS offers three main paths to get current, based on whether your non-filing was non-willful or willful. Most late filers qualify for a penalty-reduction program, and acting sooner matters.

Here are the main options:

• Streamlined Filing Compliance Procedures: For non-willful filers, this program lets you file the last three years of tax returns and six years of FBARs with reduced or zero penalties. See IRS Streamlined Procedures.
• Delinquent FBAR Submission Procedures: If you have no unreported income, you may file past-due FBARs without penalties. See IRS Delinquent FBAR Procedures.
• Voluntary Disclosure Practice: For willful cases, this is the formal path. You will face penalties, but criminal charges become far less likely.

If you are a first-time filer getting started, our FBAR first-time filer guide walks through the full process step by step. Green card holders with UK accounts should also review our guide on FBAR rules for green card holders.

Can I Keep a UK Bank Account If I Live Abroad?

Yes, US persons can keep UK bank accounts while living outside the United Kingdom. There is no UK law that forces you to close an account simply because you move abroad. However, you must report these accounts on the FBAR each year the combined value of all your foreign accounts exceeds $10,000.

The bigger risk is that your UK bank may close your account on its own. Since FATCA took effect, many UK banks have dropped US-person clients because the cost of reporting to HMRC (and then to the IRS) outweighs the profit from a single account. According to a 2020 report from the Association of Americans Resident Overseas (AARO), roughly one in five US persons living abroad had a bank account closed or a new account denied due to FATCA rules. Barclays, HSBC, and several building societies have been cited in these cases.

If your UK bank closes your account, you still have options. Some banks — such as HSBC Expat and Wise (formerly TransferWise) — serve US persons abroad. You can also hold accounts at UK-based digital banks that accept US tax residents. No matter which bank you use, the FBAR filing duty remains as long as you hold the account and exceed the $10,000 threshold.

Frequently Asked Questions

Below are the most common questions about reporting UK bank accounts on your FBAR. These answers cover closed accounts, the $10,000 threshold, ISA tax treatment, joint accounts, and the US-UK tax treaty. If your UK accounts had a combined peak value above $10,000 at any point during the year, you likely need to file. The answers below explain how specific UK account types and rules apply to your situation.

Do I report a UK account I closed partway through the year?

Yes. If you held the account at any point during the calendar year and your aggregate foreign account values exceeded $10,000, you must report the closed account. Use the maximum value the account reached before you closed it.

My UK bank account holds less than $10,000. Do I still file?

That depends on the total. Add up the peak values of all your foreign accounts worldwide — not just UK accounts. If you have a EUR5,000 account in France and a GBP4,000 account in the UK, the combined value may push you over the $10,000 threshold.

See our guide on how to calculate maximum account value for a detailed walkthrough.

Are ISA gains taxable in the United States?

ISAs are tax-free in the UK. The US does not honor the ISA tax wrapper. Interest, dividends, and capital gains inside an ISA are taxable on your US income tax return. This is an income tax question apart from the FBAR, but it often surprises US persons holding UK ISAs.

Does the US-UK tax treaty protect me from FBAR penalties?

No. The US-UK Income Tax Treaty covers income tax. The FBAR is a Bank Secrecy Act duty under 31 USC 5314, not an income tax rule. The treaty does not override BSA reporting rules. FBAR penalties apply no matter what treaty position you take.

Do joint account holders both need to file an FBAR for UK accounts?

Yes. Each US person with a financial interest in or signature authority over a foreign account must file on their own. If you and your spouse both have access to a UK joint account, you both may need to file. See our article on FBAR joint account reporting rules for details.

Let FBAR Direct Handle Your UK Account Filing

UK accounts make FBAR filing harder — multiple account types, GBP-to-USD conversions, ISA wrappers, Premium Bond face values, and pension reporting. Getting these wrong can lead to penalties or IRS notices.

Let FBAR Direct prepare your filing — you review and approve before we submit to FinCEN. Upload your UK statements and we handle conversion, reporting, and submission. See how it works.

This article is current as of March 13, 2026. Tax rules change — verify current rules at IRS.gov or FinCEN.gov. Consult a qualified tax pro for advice specific to your case.