Do I still need account details if I check the 25 accounts box on the FBAR?

Yes, in full. 31 CFR 1010.350(g) provides that a filer with 25 or more accounts need only report the number of accounts and certain basic information, but will be required to provide detailed information concerning each account when requested by the Secretary or his delegate. The FinCEN line item instructions for FinCEN Form 114 say the same thing in operational terms: anyone who reports 25 or more accounts at Item 14a or Item 14b must provide all the information omitted from Parts II, III, IV or V if FinCEN or the IRS requests it. Separately, 31 CFR 1010.420 requires you to create and retain records of the account name, number, institution name and address, account type and maximum value regardless of how you completed the form.

Do accounts I have a financial interest in and accounts I only sign on combine to reach 25?

No. The two tests in 31 CFR 1010.350(g)(1) and (g)(2) are applied separately and are never aggregated. Each column has to reach 25 on its own. A filer with a financial interest in 12 accounts and signature authority over 17 has 29 reportable accounts but qualifies for neither simplification, and must complete a full FinCEN Form 114 itemising all of them. It is also common to qualify under one limb only, which produces a return with Item 14a checked and Parts II and III blank, alongside a fully completed Part IV for the smaller set of signatory accounts.

Is the 25 counted per account or per bank?

Per account. Each separately identifiable foreign financial account with its own number or designation counts as one, regardless of how many of them sit within a single banking or platform relationship. A UK bank relationship comprising a current account, two savings accounts and three fixed-term bonds is six accounts. An investment platform with nine separately designated sub-accounts is nine. Joint accounts count in full for each US person with a financial interest, and accounts of an entity in which you directly or indirectly own more than 50 percent of the voting power or equity are attributed to you under 31 CFR 1010.350(e).

How long do I have to keep the records if I used the 25 account simplification?

Five years. 31 CFR 1010.420 states that the records shall be retained for a period of 5 years and shall be kept at all times available for inspection as authorized by law, and IRS guidance and IRM 4.26.16 confirm that period runs from the due date for filing the FBAR for that calendar year. The five records are the name in which the account is maintained, its number or other designation, the name and address of the foreign bank or other person with whom it is maintained, the type of account, and the maximum value of the account during the reporting period. Using the simplified election does not shorten or alter that duty in any way.

Does the 25 account rule apply to Form 8938 as well?

No. The concession is a Bank Secrecy Act rule and applies only to FinCEN Form 114, filed through FinCEN's BSA E-Filing System. Form 8938, the FATCA statement of specified foreign financial assets filed with your income tax return, has no equivalent - every specified foreign financial asset is itemised with its maximum value however many there are. Because both forms draw on the same underlying account data, most of the apparent time saving from checking the FBAR box disappears once Form 8938 is prepared properly, which is one reason we usually recommend itemising the FBAR anyway.

Can I use the 25 account rule when catching up on missed FBARs?

Technically yes, but it is rarely the right call. Late FBARs for a US person in the UK normally form part of a submission under the Streamlined Foreign Offshore Procedures, which requires a certification of non-willfulness signed under penalties of perjury. That certification is assessed for consistency with the filings that accompany it, and a form showing only a checked box and a number gives a reviewer nothing to corroborate. There is also a timing mismatch: the record retention duty under 31 CFR 1010.420 runs five years from the FBAR due date, while the civil penalty assessment window under 31 USC 5321(b)(1) runs six years from the violation date, so a year can stay open to assessment after the retention period for it has closed. Itemising the accounts puts the detail permanently on a filed federal form.

Missed FBAR: The 25 or More Accounts Rule

A Missed FBAR that involves 25 or more foreign financial accounts can be brought up to date using a simplified reporting election: you check the box at Item 14a or Item 14b of FinCEN Form 114, state the number of accounts, and you do not complete the detailed per-account items in Part II, Part III or the whole of Part IV. That is the full extent of the relief. Under 31 CFR 1010.350(g)(1) and (g)(2) the filer still needs only to provide the number of financial accounts and certain other basic information on the report, but will be required to provide detailed information concerning each account when so requested by the Secretary or his delegate. The election gives you a shorter form. It does not give you a lighter legal standard, a reduced record duty, or any protection at all if FinCEN or the IRS comes back and asks for the account-level detail you chose not to submit.

That distinction matters most to exactly the people who are most likely to qualify for it. A US citizen working in London as an investment banker, a business owner with a UK trading company and a property company, or an investor running money across several platforms will cross 25 reportable accounts far earlier than they expect, and will often cross it in a year they never filed for. The 25-account rule then looks like a gift: a way to clean up years of non-filing without reconstructing dozens of account histories. In practice it is the opposite. It quietly transfers the entire evidential burden from the form to the filer, and it does so at precisely the moment - a Missed FBAR remediation - when the filer is least able to prove what the balances were.

What Is the FBAR 25 or More Accounts Rule?

The 25 or more accounts rule is a modified reporting provision in the Bank Secrecy Act regulations. It sits at 31 CFR 1010.350(g), in the subsection headed special rules, and it has two limbs. Paragraph (g)(1) covers a United States person having a financial interest in 25 or more foreign financial accounts. Paragraph (g)(2) covers a United States person having signature or other authority over 25 or more foreign financial accounts. Both limbs use the same operative language: the person need only provide the number of financial accounts and certain other basic information on the report, but will be required to provide detailed information concerning each account when so requested by the Secretary or his delegate.

The Internal Revenue Manual restates the rule at IRM 4.26.16.3.6 for financial interest and IRM 4.26.16.3.7 for signature authority, and in both places it adds the point that most published summaries skip over: the filer must still comply with the recordkeeping requirements. The rule is a form-completion concession administered by FinCEN. It is not a statutory exemption, it is not an election with a filing threshold of its own, and it is not something you apply for. If you meet the account count, the option is simply available to you when you complete FinCEN Form 114 through FinCEN's BSA E-Filing System.

It is worth noting where the rule does not appear. The IRS Report of Foreign Bank and Financial Accounts (FBAR) page and the IRS newsroom page on reporting foreign bank and financial accounts both set out the USD 10,000 aggregate threshold, the 15 April due date with its automatic extension to 15 October, and the five categories of record you must keep - but neither mentions the 25-account rule at all. Filers who research their position using the main IRS pages will not find it. That is one reason so many people with large account counts either complete an unnecessarily long form or, worse, assume that a high account count somehow excuses them from reporting altogether.

What Does the Simplified Election Let You Leave Off FinCEN Form 114?

The FinCEN line item filing instructions for FinCEN Form 114 set out precisely what changes. If you have a financial interest in 25 or more foreign financial accounts, you check the Yes box at Part I, Item 14a and enter the number of accounts in the space provided. You then do not complete Part II, which is the continuation section for separately owned accounts, and you do not complete Part III, which covers jointly owned accounts. The instruction is explicit that you should instead maintain records of that information.

The signature authority limb works differently, and the difference catches people out. If you have signature or other authority over, but no financial interest in, 25 or more foreign financial accounts, you check Yes at Item 14b and enter the number of accounts. You then complete only items 34 through 43 of Part IV - the identifying information for each person on whose behalf you hold that authority. Note the wording: for each person, not once. A filer with signature authority over 30 accounts belonging to four separate UK companies still completes four sets of items 34 to 43. The concession removes the account-level detail; it does not remove the account holder identification. A parent entity filing a consolidated report for a group with a financial interest in 25 or more accounts follows a parallel rule and completes only Part V items 34 through 42.

Set against that, here is what the election changes and what it leaves entirely untouched.

Removed from the form: the account number or other designation for each account, the maximum value of each account during the calendar year, the type of account, and the name and address of each foreign financial institution - for every account covered by the election.
Still required on the form: the Item 14a or Item 14b box, the accurate number of accounts, all of Part I filer identification, and, under the signature authority limb, items 34 to 43 of Part IV for each account holder.
Unchanged: the USD 10,000 aggregate filing threshold, tested against the maximum values of all foreign financial accounts at any time during the calendar year.
Unchanged: the 15 April due date, with the automatic extension to 15 October that requires no request and no form.
Unchanged: the obligation to file electronically on FinCEN Form 114 through the BSA E-Filing System.
Unchanged: the record creation and retention duty under 31 CFR 1010.420, and the obligation to produce every omitted detail on request from FinCEN or the IRS.

What the 25 Account Box Does Not Relieve: Records Under 31 CFR 1010.420

This is the part of the rule that gets one sentence in most guides and deserves several. 31 CFR 1010.420 is a standalone recordkeeping regulation that applies to persons having financial interests in foreign financial accounts. It requires records showing the name in which each such account is maintained, the number or other designation of such account, the name and address of the foreign bank or other person with whom such account is maintained, the type of such account, and the maximum value of each such account during the reporting period. Those records shall be retained for a period of 5 years and shall be kept at all times available for inspection as authorized by law. IRS guidance and IRM 4.26.16 confirm that the five years run from the due date for filing the FBAR for that calendar year.

Read those two rules together and the architecture becomes clear. The five data points that 31 CFR 1010.420 requires you to hold are the same five data points that the 25-account election lets you leave off the form. The regulation was never drafted so that a filer could avoid gathering the information. It was drafted so that FinCEN would not have to receive it up front from a filer with 60 accounts. The information still has to exist, in the filer's hands, for at least five years, and the FinCEN line item instructions close the loop: any person who reports 25 or more foreign financial accounts at Item 14a or Item 14b must provide all the information omitted from Parts II, III, IV or V if that information is requested by FinCEN or the IRS.

There is no materiality filter in that sentence and no proportionality. A request can arrive for all accounts or for one. It can arrive in the course of an examination of an entirely different issue. The filer who elected simplification and then cannot answer is in a materially worse position than the filer who never had 25 accounts, because the checked box is a written representation that the accounts exist and that their number is known. Having asserted the count, you have to be able to stand behind it item by item.

How Are the 25 Accounts Counted - Per Account or Per Institution?

Per account. Not per institution, not per banking relationship, not per platform, and not per country. The regulation counts foreign financial accounts, and each separately identifiable account with its own number or designation counts as one. A single UK bank relationship comprising a current account, two savings accounts and three fixed-term bonds is six accounts, not one. An investment platform holding nine separately designated sub-accounts is nine. This is the single most common counting error we correct, and it almost always runs in the direction of the filer undercounting and concluding the rule does not apply to them.

The second counting rule is that the two limbs are tested separately and never combined. Accounts in which you have a financial interest go into one column. Accounts over which you have signature or other authority but no financial interest go into the other. Each column must independently reach 25 before the corresponding box becomes available. A filer with a financial interest in 12 accounts and signature authority over 17 has 29 reportable accounts and no entitlement to either simplification - that person completes a full FBAR with every account itemised. Conversely, a filer can qualify under one limb and not the other, which produces a hybrid return: Item 14a checked with Parts II and III left blank, alongside a fully completed Part IV for a smaller set of signatory accounts.

Two further points on counting. Joint accounts count in full for each US person who has a financial interest in them, and each such person reports the account's full maximum value rather than a share - so a married couple who both hold US person status can each be counting the same joint accounts toward their own 25. And a financial interest is not limited to accounts held in your own name: 31 CFR 1010.350(e) attributes a financial interest to a US person who directly or indirectly owns more than 50 percent of the voting power or equity of an entity that is the owner of record of an account. Every account of a UK company you majority own is one of your accounts for counting purposes.

Why Wealthy UK-Based Filers Reach 25 Accounts Sooner Than They Expect

The 25-account threshold sounds like a number reserved for institutional filers. It is not. It is a number that ordinary UK financial arrangements reach quickly once the person has a company, a platform and a habit of opening fixed-rate products. Signature authority is the accelerant: it attaches to accounts you do not own and may never have thought of as yours, including accounts of an employer, a portfolio company or a family business where you are a director or authorised signatory. IRM 4.26.16 defines signature or other authority as the ability to control the disposition of money, funds or other assets held in a financial account by direct communication to the institution, whether alone or jointly with others. Being one of two required signatories is enough.

A typical senior UK-based US person accumulates accounts along these lines.

Personal banking: two or three current accounts across different UK banks, plus instant access savings accounts attached to each - commonly five to seven accounts before anything else is counted.
Fixed-term products: each fixed-rate bond, notice account or regular saver carries its own account number and counts separately, and a filer who ladders maturities can hold four or five at once.
Cash and stocks and shares ISAs: each ISA wrapper is a separate reportable account, and filers frequently hold several from different tax years across different providers.
Investment platforms and general investment accounts: platforms often carry a separate designation for each sub-account or model portfolio, and each designation counts.
Joint accounts with a spouse or partner: counted in full by each US person with a financial interest, not split.
Company accounts where you hold more than 50 percent: every current account, deposit account, merchant account and currency account of that company is attributed to you under 31 CFR 1010.350(e).
Signature authority roles: director or authorised signatory positions on the accounts of an employer, a UK trading business or an investment vehicle, counted in the separate signature authority column.

Add those together for a business owner or a banker with a personal service company and the count is rarely below 20. The practical consequence is that the 25-account rule is not an edge case for high-net-worth US persons in the UK - it is close to the base case, and it is a question that should be settled early in any compliance exercise rather than discovered halfway through completing the form.

Worked Example: A Missed FBAR Covering 41 UK Accounts

Marcus Delaney is a fictional composite of clients we see regularly. He is a US citizen, 47, resident in London for eleven years, a managing director at an investment bank. He has never filed an FBAR. He holds four personal current and savings accounts across three UK banks, three fixed-term savings bonds, two cash ISAs and a stocks and shares ISA, five separately designated platform sub-accounts, two joint accounts with his UK spouse, and ten accounts belonging to two UK companies he owns outright - a personal service company and a property company. That is 27 accounts in which he has a financial interest, once the corporate accounts are attributed to him under 31 CFR 1010.350(e). Separately, he is one of two authorised signatories on 14 accounts of a UK trading business in which he holds a 20 percent stake and a directorship.

Marcus therefore qualifies under one limb and not the other. He has a financial interest in 27 accounts, so he may check Item 14a, enter 27, and leave Part II and Part III blank. He has signature authority over 14 accounts, which is below 25, so Item 14b is not available and he must complete Part IV in full for every one of those 14 accounts - account number, maximum value, institution name and address, account type, and the identifying details of the trading business as account holder. His aggregate maximum values run well past USD 10,000 in every year concerned, so the filing obligation is not in doubt. On first inspection the simplified route saves him from itemising 27 accounts across six calendar years, which is 162 line items.

The saving is illusory, and here is why. To decide that he crossed the USD 10,000 aggregate threshold in each year, Marcus has to establish the maximum value of each account in each year anyway - the threshold is tested against aggregate maximum values, and there is no way to test it without the underlying figures. To satisfy 31 CFR 1010.420 he has to hold those figures, plus the institution details and account types, for five years from each FBAR due date. And to complete Part IV for the 14 signatory accounts he has to obtain company bank data for a business he does not control, which is usually the hardest part of the whole exercise. The checked box at Item 14a removes 162 data entry operations and removes none of the data gathering. What it does remove is the audit trail: had he itemised, the filed FBARs themselves would evidence the balances. Having elected simplification, nothing on the record does.

Six years on, that gap is not academic. Two of the platform sub-accounts were closed in the earliest year. One of the fixed-term bonds matured and the provider was acquired. UK institutions are frequently unable to produce statements for closed accounts going back that far, and where they can, the process runs to weeks per account. Marcus can still file. What he cannot do, if a request arrives, is prove the numbers he implicitly asserted when he checked the box and wrote 27.

How the 25 Account Rule Interacts With a Missed FBAR Remediation

When the FBARs being filed are late, the calculus changes materially. A Missed FBAR remediation for a US person resident in the UK will normally run through the Streamlined Foreign Offshore Procedures, with the Streamlined Domestic Offshore Procedures applying to those who do not meet the non-residency test. Those procedures are the live published route, and the IRS FBAR page directs late filers to the Streamlined filing compliance procedures and to FinCEN's late filing reason facility. Streamlined requires delinquent or amended returns for the relevant period alongside FBARs for the covered FBAR years, together with a certification of non-willfulness signed under penalties of perjury.

It is the certification that makes the simplified election awkward. A non-willfulness certification is a narrative document that has to explain what the accounts were, how they arose, and why they went unreported. It is assessed by people who are looking for consistency between the story and the filings. A set of streamlined-submitted FBARs that consist of a checked box and the number 27 gives the reviewer nothing to corroborate the narrative against, and gives the filer nothing to point to later. An itemised set does the corroboration automatically. Where a case is being built on the credibility of an explanation, self-evidencing filings are worth considerably more than the hours they cost.

There is a second timing problem specific to late filers. The record retention duty under 31 CFR 1010.420 runs for five years from the FBAR due date, while the civil penalty assessment window for FBAR violations runs for six years from the date of the violation under 31 USC 5321(b)(1). Those periods are not aligned. For roughly a year at the end of each cycle, a year can remain open to assessment after the retention duty for that year has expired. That asymmetry is uncomfortable for any filer, but it is far more dangerous for one who elected simplification, because the filer who itemised has the filed form as a permanent record of the detail while the filer who checked the box has nothing on file and no continuing obligation to hold the source data. Expiry of the retention period is not a substitute for the information and it is not an answer to a request.

Two Traps the Standard Guides Miss

The first concerns penalty structure. In Bittner v. United States, decided by the Supreme Court in 2023, the court held that the non-willful FBAR penalty accrues per report rather than per account. For a filer in the 25-account cohort that is a significant point: the non-willful exposure of a person with 41 accounts is calculated on the same per-report basis as that of a person with three. Willful penalties work differently, being measured by reference to the balances in the accounts and applied at account level, so the number of accounts drives the arithmetic directly. Specific penalty figures are adjusted annually for inflation and should be confirmed against current published amounts rather than quoted from a blog. The structural point stands regardless of the figures: for a large-account filer, the entire gap between non-willful and willful characterisation is measured in orders of magnitude, and the quality of the contemporaneous record is what keeps a case on the non-willful side of that line. Electing to file the shortest possible form is not how you build that record.

The second concerns the rest of the compliance package. The 25-account concession is a Bank Secrecy Act rule that applies to FinCEN Form 114 and to nothing else. Form 8938, the FATCA statement of specified foreign financial assets filed with the income tax return, has no equivalent simplification - every specified foreign financial asset is itemised, with maximum values, whatever the count. A filer with 41 accounts who leans on Item 14a to shorten the FBAR will nonetheless itemise the reportable subset on Form 8938. Since the two forms draw on the same underlying account data, the supposed time saving on the FBAR largely evaporates once the FATCA form is prepared properly. In practice, once you have assembled the data to a Form 8938 standard, itemising the FBAR is marginal additional work with a substantial evidential payoff.

Should You Use the Simplified Election, or File in Full?

Our default position for high-net-worth filers is to complete FinCEN Form 114 in full even when the 25-account election is available. The election is legitimate and correctly used in some cases, but the circumstances that make it genuinely appropriate are narrower than its popularity suggests. The question to ask is not whether you qualify - it is whether you would rather the detail sat on a filed federal form or in a folder you have to be able to find in five years.

The election is usually appropriate where the accounts are current, held with institutions that provide reliable historic reporting, and where the filer has a maintained schedule that already satisfies 31 CFR 1010.420. It is usually inappropriate where any part of the account population is closed or historic, where the filing is late, where a Streamlined certification is being prepared, or where signature authority accounts belong to entities the filer does not control. In every one of those situations the cost of itemising is measured in hours and the cost of not itemising is measured in an inability to respond years later.

Whichever route is taken, the underlying discipline is identical: a permanent, per-account schedule showing the name in which the account is maintained, its number or designation, the institution's name and address, the account type, and the maximum value during each calendar year, converted at the Treasury year-end rate. That schedule is the compliance product. FinCEN Form 114 is only the transmission of part of it. The 25 or more accounts rule changes how much of that schedule gets transmitted - and nothing else.