Form 8938 Reporting: What Wealthy US-UK Clients Should Know For wealthy Americans in Britain, Form 8938 reporting is the annual disclosure of your specified foreign financial assets to the IRS, filed with your 1040. Miss it, and you risk a $10,000 penalty, a 40% understatement charge, and a tax year that never closes. By the […]
For wealthy Americans in Britain, Form 8938 reporting is the annual disclosure of your specified foreign financial assets to the IRS, filed with your 1040. Miss it, and you risk a $10,000 penalty, a 40% understatement charge, and a tax year that never closes.
By the Jungle Tax Cross-Border Tax Team — reviewed by a US-UK dual-qualified adviser (CPA / Enrolled Agent).
Form 8938, the Statement of Specified Foreign Financial Assets, is the IRS mechanism that puts the Foreign Account Tax Compliance Act (FATCA) into practice at the individual level. It was introduced under Internal Revenue Code §6038D, and unlike some foreign-asset disclosures,s it is filed with your annual federal income tax return rather than separately. You can review the official overview on the IRS About Form 8938 page.
The purpose is transparency. Congress designed FATCA so the IRS could see, from your own return, the value and character of assets you hold outside the United States. For a US citizen or green-card holder living in the UK — where holding ISAs, SIPPs, investment platforms and UK company shares is entirely normal — this means a large share of your ordinary financial life becomes reportable. Effective Form 8938 reporting is therefore less an edge case and more a routine part of dual-status compliance.
It also sits inside a wider information-sharing machine. Under FATCA, UK banks and investment houses report account details on US clients directly to HMRC, which passes them to the IRS. That means the IRS frequently already holds data on your UK accounts before you file. When your Form 8938 does not reconcile with your bank’s reporting, the mismatch is exactly the kind of flag that prompts an inquiry. High-net-worth clients, with balances well above the reporting thresholds and often multiple institutions, are the most visible of all — which is precisely why precision matters more the wealthier you are.
The thresholds depend on two things: whether you live abroad and your filing status. Americans who are genuinely resident in the UK enjoy substantially higher thresholds than those living in the States, because the rules recognize that expatriates naturally accumulate foreign assets. The current figures, confirmed on the IRS page Do I need to file Form 8938?, are set out below.
|
Filing status |
Threshold (last day of year) |
Threshold (any time in the year)
|
|---|---|---|
|
Living abroad — single/married filing separately |
$200,000 |
$300,000 |
|
Living abroad — married filing jointly |
$400,000 |
$600,000 |
|
Living in the US — single/married filing separately |
$50,000 |
$75,000 |
|
Living in the US — married filing jointly |
$100,000 |
$150,000 |
You cross the threshold if the aggregate value of all your specified foreign financial assets exceeds the relevant figure, which is why Form 8938 reporting so often applies to wealthy expatriates who would never think of themselves as “offshore”. That “any time during the year” test catches taxpayers who assume a year-end snapshot is enough — a mid-year property sale or bonus that briefly parked funds in a UK brokerage account can trigger the obligation even if balances fall by 31 December.
Two points regularly trip up wealthy filers. First, the thresholds are tested on aggregate value, not per account, so several modest holdings can combine to breach the limit. Second, valuation is in US dollars using the year-end Treasury exchange rate, which means a strong pound can push otherwise stable sterling balances over the line from one year to the next without you adding a penny. Married couples should also take care with the filing-status question: the jointly held thresholds are generous, but a spouse who is not a US person changes the analysis. Assets must be attributed correctly between partners rather than simply pooled.
The definition is broad. According to the Instructions for Form 8938, specified foreign financial assets include foreign bank and brokerage accounts, foreign stock or securities held outside a custodial account, interests in foreign entities, foreign pensions, and certain foreign trusts. For UK-based clients that typically pull in:
Crucially, directly held foreign real estate is not a specified foreign financial asset. Your flat in London or holiday home in Cornwall does not go on Form 8938 if you own it personally — although a UK company or trust that holds the property can very much be reportable. Because so many UK funds are passive foreign investment companies, wealthy clients often file Form 8621 alongside their 8938, and the interaction between the two is a common source of error. Accurate Form 8938 reporting, therefore, starts with a proper inventory of everything you hold outside the United States.
Foreign trusts and family investment structures deserve particular care. Interests in a foreign trust, and in some cases the assets it holds, can be specified foreign financial assets — and they frequently sit alongside separate reporting on Forms 3520 and 3520-A. Wealthy families who have set up UK trusts for succession or asset protection are often surprised to find those arrangements generate US disclosure obligations quite independent of any UK tax outcome. Where entity and trust interests are involved, valuing them for Form 8938 is a matter of judgment rather than a simple bank statement, and getting that valuation defensible is part of doing the job properly.
This is the question we answer most often. The FBAR (FinCEN Form 114) and Form 8938 overlap heavily, yet they are separate obligations administered by different arms of the Treasury. Many wealthy US-UK clients must file both every year. The IRS maintains a detailed comparison of Form 8938 and FBAR requirements, summarised here.
|
Feature |
Form 8938 |
FBAR (FinCEN 114)
|
|---|---|---|
|
Agency |
IRS |
FinCEN (Treasury) |
|
Filed with |
Your Form 1040 |
Separately, electronically to FinCEN |
|
Lowest threshold (abroad) |
$200,000 aggregate |
$10,000 aggregate across accounts |
|
Asset scope |
Broad — accounts, securities, pensions, entity interests |
Foreign financial accounts only |
|
Real estate (held directly) |
Not reportable |
Not reportable |
The practical takeaway: the FBAR’s $10,000 trigger is far lower, so many clients file an FBAR but sit below the Form 8938 threshold — while a wealthy client will usually breach both. Getting Form 8938 reporting right does not discharge your FBAR duty, and vice versa. For the account-reporting side, see the IRS guidance on the Report of Foreign Bank and Financial Accounts and our breakdown of FBAR penalties.
The penalty regime is where Form 8938 reporting becomes genuinely expensive. A failure to file a complete and correct Form 8938 by the due date carries a $10,000 penalty. If you do not file within 90 days after the IRS mails you a notice, an additional $10,000 penalty applies for every 30 days, up to a maximum of $50,000. On top of that, any underpayment of tax attributable to undisclosed specified foreign financial assets is subject to a 40% substantial-understatement penalty.
The sting in the tail is the statute of limitations. Where a required Form 8938 is omitted, the assessment period for the whole return can stay open — potentially indefinitely — until the form is filed. In other words, a return you thought was closed after three years remains fully exposed to IRS examination. A reasonable-cause defense exists and is decided on a case-by-case basis, but it is far cheaper to file correctly than to argue reasonable cause after the fact. The wider FATCA framework is explained in our overview of FATCA for US expats.
For high-net-worth clients, the numbers compound quickly because penalties can apply per form and per year. Someone who has quietly failed to file for several years is not looking at a single $10,000 charge but at a stack of them, potentially alongside separate FBAR penalties for the same accounts and PFIC charges on the same funds. This is why we treat historic non-compliance as urgent rather than academic: the exposure grows with every year the returns sit open, and voluntary correction almost always costs less than waiting for the IRS to make first contact.
Consider “James”, a US citizen who moved to London and built a media business. By 2025, he held a SIPP worth roughly $280,000, a UK brokerage account of $150,000 holding OEICs, and a 30% stake in his UK trading company. His accountant had filed FBARs but never a Form 8938, assuming the pension and shares “were already covered”. They were not.
On aggregate, James held well over $400,000 of specified foreign financial assets — comfortably above the married-filing-jointly abroad threshold — and his OEICs were unreported PFICs. Because no Form 8938 had ever been filed, none of his returns had technically closed.
We brought him current through the IRS Streamlined Filing Compliance Procedures, prepared the missing 8938s and 8621s, and closed off the open-ended exposure before it became a $50,000 problem. The fix cost a fraction of the penalties he was facing.
James’s case is typical in one important respect: the problem was not deliberate concealment but a well-meaning accountant who did not specialize in US-UK matters and assumed the FBAR was enough. That non-willful profile is exactly what the streamlined route is built for.
Because we could evidence reasonable, non-willful conduct and bring three years of returns and six years of FBARs into line in a single coordinated filing, James avoided the punitive penalty regime altogether and, just as importantly, restored certainty to returns that had been silently open for years. For any wealthy US person in the UK, that certainty — knowing your disclosures are complete and your years are genuinely closed — is the real value of getting this right the first time.
If you hold UK pensions, investments, or company shares and you are a US person, get your disclosures reviewed before the IRS reviews them for you. Jungle Tax — Accountants for Creatives — handles US-UK reporting end to end.
Email hello@jungletax.co.uk | Call 0333 880 7974 | Visit jungletax.co.uk
No. Form 8938 is attached to and filed with your annual Form 1040 by the same deadline, including extensions. This is a key difference from the FBAR, which is filed separately and electronically with FinCEN.
Very possibly, yes. The two are separate obligations with different agencies, thresholds and asset scopes, and many wealthy US-UK clients must file both. Filing Form 8938 does not discharge the other, so accurate reporting on Form 8938 is required in addition to your FBAR whenever your assets exceed the 8938 threshold.
Not if you own it directly in your own name — directly held foreign real estate is excluded. However, if the property is held through a UK company, partnership or trust, your interest in that entity is a specified foreign financial asset and becomes reportable.
Generally yes. Both are foreign financial accounts or foreign pensions and count towards your aggregate specified foreign financial assets. The tax-free status they enjoy in the UK does not exempt them from US reporting, and the funds held within them are often PFICs that require Form 8621.
Because an omitted 8938 can keep the statute of limitations open on the whole return, back-filing matters. Eligible taxpayers can often use the IRS Streamlined Filing Compliance Procedures to become compliant by filing the missing forms with a reduced or waived penalty when the failure was non-willful.
