NOT financial advice - seek advice from a professional for your specific situation

    TaxKilnUK tax guidance
    TaxKilnUK tax guidance

    Moving Abroad → FATCA plus reporting overlay

    FATCA plus Form 8938 plus FBAR, UK-USA Reporting Overlay

    FATCA (Foreign Account Tax Compliance Act, IRC ss.1471-1474) creates parallel reporting obligations independent of the UK-USA DTA. UK financial institutions report US-person account information to HMRC under the UK-USA Intergovernmental Agreement (2012), and HMRC shares with the IRS. US persons themselves file Form 8938 (Statement of Specified Foreign Financial Assets) with their annual US tax return plus FBAR (FinCEN Form 114) annually with FinCEN. The reporting overlay is distinct from the DTA and is not modifiable by treaty. Penalties for non-compliance are severe; Streamlined Filing Compliance Procedures provide a self-serve route for non-wilful late filers.

    Last reviewed:

    Guidance, not advice. We explain the rules, we don't assess your situation. Always seek financial or tax advice from your accountant, or contact HMRC. Read our editorial scope →

    In plain English

    FATCA is a US law that runs alongside the tax treaty. It does not change how much tax you pay; it changes what you have to tell the US government. There are two separate filings for US persons UK-resident. Form 8938 goes with your US tax return (Form 1040). It lists foreign financial assets above certain thresholds. FBAR (FinCEN Form 114) is a separate filing with the US Treasury's Financial Crimes Enforcement Network. It lists foreign bank and financial accounts where the aggregate balance exceeded 10,000 USD at any time during the year. Meanwhile, your UK bank also reports your account to HMRC under the UK-USA Intergovernmental Agreement (IGA) signed in 2012. HMRC then passes that information to the IRS. So the IRS sees your UK accounts from two sides: your own filings and the UK bank's reporting. Penalties for missing these filings can be large, especially for FBAR. If you have missed years and the failure was non-wilful, the IRS Streamlined Filing Compliance Procedures provide a self-serve catch-up route, often without penalty for foreign-resident US persons.

    How it works

    UK-USA IGA 2012, how UK banks report

    The UK-USA IGA was signed 12 September 2012 as a Model 1 IGA (information flows: UK financial institution to HMRC to IRS). UK financial institutions identify US-person account holders using indicia (US citizenship, US birthplace, US address, US phone, standing orders to US accounts) and report annual account information to HMRC, who passes it to the IRS. UK banks have largely operationalised this since 2014. Some UK banks (e.g. certain private banks) close US-person accounts rather than maintain FATCA compliance overhead, especially for smaller balances.

    Form 8938, US persons annual filing

    Form 8938 (Statement of Specified Foreign Financial Assets) is filed with your annual Form 1040. Thresholds for US persons UK-resident (filing as foreign-resident) are higher than for US-resident filers: - Single or married filing separately: 200k USD year-end OR 300k USD any time during year - Married filing jointly: 400k year-end OR 600k any time Reportable assets include: foreign deposit and custodial accounts, foreign stock and securities not held in financial accounts, foreign partnership interests, foreign mutual funds (PFICs), foreign trusts where you are beneficiary or grantor, foreign pension plans (broadly, with technical exceptions). Penalty for failure to file: 10,000 USD initial plus 10,000 USD per 30 days of continued failure after IRS notice, capped at 50,000 USD per year. Plus 40 percent accuracy-related penalty on understatements attributable to undisclosed foreign assets.

    FBAR (FinCEN Form 114), annual filing

    FBAR is a separate filing under the Bank Secrecy Act, not the IRC. It is filed annually with FinCEN (NOT with the IRS) electronically via the BSA E-Filing System. Threshold: aggregate maximum balance of all foreign financial accounts exceeded 10,000 USD at any point during the calendar year. Reportable accounts include: bank accounts, securities accounts, mutual fund accounts, certain insurance policies with cash value, certain pensions (debated, with practical reporting commonly applied to SIPPs by cautious practitioners). Joint accounts, signature authority over accounts (even without ownership), and grandparent accounts for minor children are all in scope. Due date: 15 April with automatic extension to 15 October. Penalties: non-wilful violations up to 10,000 USD per violation (per account per year); wilful violations the greater of 100,000 USD or 50 percent of account balance per year; criminal penalties for wilful violations.

    Streamlined Filing Compliance plus Delinquent FBAR Submission Procedures

    Two publicly-documented self-serve catch-up programmes: 1. Streamlined Filing Compliance Procedures (Streamlined Foreign Offshore for US persons UK-resident): 3 amended tax returns plus 6 FBARs plus certification of non-wilful conduct. No FBAR or accuracy-related penalty for qualifying foreign-resident filers. Tax plus interest still due. 2. Delinquent FBAR Submission Procedures: for filers who have reported and paid tax on all income but missed FBAR. No penalty for late FBAR if conditions met. Both procedures are self-serve at irs.gov, free of any specialist gatekeeping. Genuine specialist counsel is warranted only where wilfulness is in issue, criminal exposure is possible, or facts are complex (PFICs, foreign trusts, gift-tax overlay). Cold-pitch firms advertising 'streamlined specialist fees 5,000 USD plus' typically commoditise simple cases; appropriate fees from CIOT International plus AICPA practitioners are 2-5k GBP range for genuinely complex situations.

    Who this applies to + key conditions

    Statute + manual references

    Primary: FATCA, IRC ss.1471-1474 plus Treasury Regulations plus UK-USA IGA 2012 (Model 1)

    Related: FBAR, 31 USC s.5314 plus 31 CFR s.1010.350; Form 8938, IRC s.6038D; PFIC reporting, Form 8621 (interacts with FATCA); Foreign Trust reporting, Forms 3520 plus 3520-A (separate regime, often relevant)

    Common mistakes + traps

    Worked example

    Sarah, US citizen UK-resident since 2018, UK current account, UK savings, S+S ISA, UK SIPP

    Sarah has the following accounts at any point during 2025: UK current account 3,000 GBP, UK savings account 28,000 GBP, S+S ISA 120,000 GBP holding 3 UK-domiciled OEICs, UK SIPP 280,000 GBP. She has not previously filed FBAR or Form 8938 because no one mentioned them.

    1. FBAR threshold check: aggregate maximum balance during 2025 = ~431,000 GBP roughly 540,000 USD, well above 10,000 USD threshold. FBAR required.
    2. Form 8938 threshold check: foreign-resident single filer threshold 200k year-end / 300k any time. Year-end ~430k GBP roughly 530k USD; threshold met. Form 8938 required.
    3. Form 8621 PFIC reporting: each of the 3 OEICs in the S+S ISA is a separate PFIC, requires separate Form 8621 with potentially punitive Section 1291 calculation or QEF / MTM election.
    4. Sarah uses IRS Streamlined Foreign Offshore Procedures: 3 amended Form 1040 returns for 2022, 2023, 2024, with Form 8938 plus 8621 for each year; 6 FBARs for 2019-2024; non-wilful certification. Pays tax plus interest, no FBAR or Form 8938 penalty.
    5. Going forward: annual FBAR (FinCEN Form 114), annual Form 8938 with 1040, annual Form 8621 per PFIC. Consider restructuring ISA out of OEICs to UK individual shares to eliminate PFIC reporting (see /moving-abroad/usa/isa-pfic-trap-and-uk-savings).

    Outcome: Sarah catches up via Streamlined, avoiding the 10,000 USD per missed Form 8938 plus 10,000 USD per non-wilful FBAR violation penalty stack. PFIC restructuring of the ISA significantly reduces ongoing compliance complexity. Estimated specialist cost for Streamlined plus PFIC catch-up plus restructuring advice: 3-5k GBP via CIOT International plus AICPA, well below 8k-plus cold-pitch market.

    How this connects to the rest of the framework

    SRT plus Substantial Presence Test →

    US-person status (citizenship, Green Card, SPT) determines FATCA / FBAR obligation; UK residence is not the trigger.

    ISA PFIC trap plus UK savings →

    ISA-held PFICs trigger BOTH Form 8621 PFIC reporting AND Form 8938 / FBAR reporting if balance thresholds met.

    DTA mechanics plus saving clause →

    FATCA is not modifiable by the DTA; treaty residence and saving clause analysis do not change reporting obligations.

    Frequently asked questions

    What happens if I miss the Self Assessment deadline?+
    The Self Assessment deadline is 31 January (online filing) for the previous tax year. Miss it and HMRC apply an automatic £100 penalty. Beyond that: £10 per day from 3 months late (capped at £900), 5% of tax due at 6 months late, and another 5% at 12 months late, under Schedule 55 of the Taxes Management Act 1970. If you have a genuine reason (serious illness, bereavement, technical issue with HMRC's systems) you can appeal with evidence; HMRC accepts reasonable excuse appeals in most genuine cases.
    Do I need an accountant or can I file Self Assessment myself?+
    Legally you can file Self Assessment yourself via gov.uk for free, most simple sole-trader returns (single income source, basic expenses) are realistic to self-file. An accountant adds real value when: your trading profit is above £40,000 (extraction-strategy decisions matter), you have multiple income streams (PAYE + self-employment + property + dividends), you've crossed the £90,000 VAT threshold, you're considering incorporation, or you have an HMRC enquiry. Expect to pay £400-£1,500/year for a typical sole-trader accountant; the cost is itself a deductible expense.
    How do payments on account work?+
    When your Self Assessment tax bill exceeds £1,000 for the first time, HMRC requires payments on account toward NEXT year's tax. Half the current bill is due 31 January (alongside the current bill); the other half is due 31 July. So your first January after crossing the threshold can hit with a double-bill: last year's balance + first payment on account. Adjust via Form SA303 if you expect next year's income to drop substantially. Payments on account don't apply if more than 80% of your tax is collected via PAYE.
    Do UK ISAs need to be reported on Form 8938 and FBAR?+
    Yes to both, if thresholds are met. The ISA wrapper is irrelevant for US reporting; the underlying account is a foreign financial account for FBAR purposes and a specified foreign financial asset for Form 8938 purposes. ISA holdings in OEICs / unit trusts / ETFs also trigger Form 8621 PFIC reporting separately. Individual UK shares in an ISA do not trigger PFIC but still count toward Form 8938 and FBAR thresholds.
    Is a UK SIPP reportable?+
    Form 8938 yes, as a foreign pension plan / specified foreign financial asset. FBAR: technically contested. IRS guidance has shifted; many cautious practitioners report SIPPs on FBAR to avoid any wilfulness exposure even where the strict reading might exclude. The conservative practice is to report.
    What if I have signature authority over a UK relative's account?+
    Signature authority alone (without beneficial ownership) triggers FBAR obligation. This catches power-of-attorney holders for elderly relatives, signatories on UK club or society accounts, signatories on UK employer accounts, and trustees of UK family arrangements. The account is reported on FBAR but typically NOT on Form 8938 if you have no beneficial interest.
    Can I rely on UK bank IGA reporting and skip Form 8938 / FBAR myself?+
    No. The IGA reporting is an obligation of the UK financial institution, separate from your personal obligations. The IRS sees the IGA report AND expects your filings independently; missing your filings while the bank has reported is a high-risk profile that often triggers IRS enquiry. Treat the IGA reporting as a reason to file accurately, not as a substitute.

    Free + regulated-body resources

    Last reviewed: