What records do I need for a late FBAR on UK accounts?

For each account and each year you need the name in which the account is maintained, the account number or designation, the name and address of the UK institution, the type of account, and the maximum value during the year. In practice that means all twelve months of statements rather than year-end statements, closure statements for accounts closed mid-year, the exchange rate applied, and any mandate conferring signature authority.

Do I have to keep a copy of the FBAR I filed?

No. The Internal Revenue Manual confirms that filers are not required to keep copies of FBARs filed, only the records underlying the filing, although the IRS notes a filed FBAR can itself satisfy the requirement where it contains the required information. For late filings, keep both: the BSA E-Filing acknowledgement proves you filed and when, while the underlying statements prove the maximum values were correct.

Who keeps the records where I only have signature authority?

The records duty attaches to signature or other authority as well as to a financial interest. The IRS provides one exception: an officer or employee who files an FBAR to report signature authority over an account of an employer need not personally keep records, because the employer must keep them. That relief assumes an employer that actually retains the records for five years, which is unreliable for an owner-managed company or a departed executive.

Does the 25-or-more accounts rule reduce recordkeeping?

No. FinCEN permits a filer with 25 or more foreign financial accounts to report basic information rather than completing a detailed item for each account, but both FinCEN guidance and the Internal Revenue Manual confirm the filer must still comply with the recordkeeping requirements and provide detailed information on every account if the IRS or FinCEN requests it. The election reduces form-filling, not evidence, and arguably increases records risk.

What if my UK bank no longer holds statements that old?

Under regulation 40 of the Money Laundering, Terrorist Financing and Transfer of Funds (Information on the Payer) Regulations 2017, UK institutions keep customer due diligence and transaction records for five years from the end of the relationship and must then delete the personal data. Where that window has closed, use a subject access request for data still held, archived downloads, lending or completion documents, HMRC interest certificates, and a dated written reconstruction stating its sources and assumptions.

Missed FBAR Recordkeeping: Five-Year Rule, UK Accounts

Q: How long must FBAR records be kept?

Five years. The IRS states that you must generally keep FBAR records for five years from the due date of the FBAR, and 31 CFR 1010.420 requires those records to be preserved for five years and kept available for inspection as authorised by law. Because the FBAR for a calendar year is due 15 April of the following year, records for calendar year 2025 must be retained until 15 April 2031.

Missed FBAR recordkeeping is the obligation almost every late filer overlooks: 31 CFR 1010.420 requires each person with a financial interest in, or signature or other authority over, a reportable foreign financial account to retain records of that account for five years from the FBAR due date, and that duty applies whether or not the FBAR was ever filed. The records must show the name in which the account is maintained, the account number or other designation, the name and address of the institution, the type of account, and the maximum value during the reporting period. If you are catching up on years of unfiled reports for UK accounts, the records are not an afterthought to the filing. They are the filing.

What does the missed FBAR recordkeeping rule actually require?

The reporting duty and the records duty come from the same statute. 31 USC 5314 directs the Secretary of the Treasury to require US residents, citizens and persons doing business in the United States to keep records, file reports, or keep records and file reports, when they maintain a relationship with a foreign financial agency. FinCEN implements the reporting half of that mandate through 31 CFR 1010.350 and FinCEN Form 114, and the records half through 31 CFR 1010.420.

The regulation is short and unconditional. Records of accounts required by 31 CFR 1010.350 to be reported must be retained by each person having a financial interest in or signature or other authority over any such account, must contain the enumerated details, must be preserved for five years, and must be kept at all times available for inspection as authorised by law. Nothing in the text makes the records duty contingent on the report having been filed. A person who never filed an FBAR for a UK account that crossed the threshold has, in the ordinary case, breached two requirements rather than one.

That distinction matters commercially. A filer who produces a complete, contemporaneous record set alongside a late FBAR is in a materially different position from one who produces a form and nothing behind it. The records are what convert an assertion about maximum balances into a supportable figure.

How long must FBAR records be kept, and when does the clock start?

The retention period is five years, and the IRS states plainly on its FBAR page that you must generally keep these records for five years from the due date of the FBAR. The clock therefore runs from the due date of the report, not from the year end, not from the date you actually filed, and not from the date the account was closed.

The FBAR for a calendar year is due 15 April of the following year, with an automatic extension to 15 October that requires no request. Practitioners should treat 15 April as the anchor for the retention calculation. So records for calendar year 2025 attach to a 15 April 2026 due date and must be preserved until 15 April 2031. Records for calendar year 2020 attached to a 15 April 2021 due date and their five-year window closed on 15 April 2026.

One qualification sits in the regulation itself, and it is precise. In computing the five years, any period is disregarded that begins on the date the taxpayer is indicted, or an information is instituted, on account of filing a false or fraudulent federal income tax return or failing to file one, and that ends on the date of final disposition of the criminal proceeding. The five years is therefore a floor in ordinary circumstances, not a guaranteed expiry date in contested ones.

What exactly must each FBAR record show?

FinCEN and the IRS describe the same five data points. For every reportable account, the retained record must establish the following.

The name in which the account is maintained, which for UK accounts means the exact registered account name, including joint holders and any account held in a maiden or former name.
The number or other designation identifying the account. For UK accounts this normally means sort code and account number, or the designation used by an investment platform or building society.
The name and address of the foreign financial institution or other person with whom the account is maintained, meaning the branch or registered office address as the institution states it.
The type of account, for example current account, savings account, cash or securities account on an investment platform, a UK pension arrangement that is reportable, or a business account in the name of a company.
The maximum value of each account during the reporting period, which is the highest figure reached at any point in the calendar year and not the year-end balance.

The maximum value point is where UK files most often fail. A December statement proves the closing balance and nothing else. Where a bonus, a share sale, a property completion or an intra-group transfer moved through a UK current account in, say, March, the peak sat in March and the record set has to capture it. The IRS accepts that documents such as bank statements can serve as the records, provided they contain the required information. That proviso is doing real work: a statement set that omits the peak month does not contain the required information.

Do you have to keep a copy of the filed FBAR itself?

Strictly, no. The Internal Revenue Manual material on FBARs is explicit that persons are not required to keep copies of FBARs filed, only the records that underlie the filing. The IRS does, however, note that a copy of a filed FBAR can itself satisfy the recordkeeping requirement where it contains the required information, because the form captures the account name, number, institution, type and maximum value.

For anyone who has missed FBARs, relying on the filed form alone is a poor strategy. A form reproduces the figures you asserted; it does not evidence them. In a catch-up, retain both: the BSA E-Filing acknowledgement with its BSA Identifier, and the underlying UK statements and institution confirmations that produced each maximum value. The acknowledgement proves you filed and when. The statements prove the numbers were right.

Who has to keep the records, and when does the employer keep them instead?

The duty falls on each person having a financial interest in, or signature or other authority over, the account. Where an account is jointly held, each US person with a financial interest carries the obligation for that account, which means a US citizen married to a UK national cannot assume that the separate filing made by the spouse discharges the records duty on jointly held UK accounts.

There is one clean carve-out. The IRS states that an officer or employee who files an FBAR to report signature authority over a foreign financial account of an employer does not need to personally keep records on those accounts, and that the employer must keep the records for them. This is the provision that spares an investment banker or a finance director from personally warehousing statements for the corporate accounts they are a signatory on.

Read the exception narrowly, because it is narrow. It applies to an officer or employee reporting signature authority over an account of an employer. It does not cover an owner-manager reporting signature authority over the accounts of a UK company they control, where the individual is in substance both the filer and the record keeper, and it does not extend to accounts in which the individual has a financial interest as well as signature authority. Where the exception applies, the practical question becomes whether the retention practice of the employer actually reaches five years from each FBAR due date, and whether a departing executive can still obtain those records after leaving.

Where does Form 114a fit into missed FBAR recordkeeping?

FinCEN Form 114a, Record of Authorization to Electronically File FBARs, is the signature authorisation record. It is used where one spouse files a single FBAR covering jointly owned accounts, and where a third party files on behalf of a taxpayer. The IRS is direct about its handling: you do not submit Form 114a with the FBAR, you keep it for your records and make it available to FinCEN or the IRS on request.

That makes Form 114a part of the retained file rather than part of the submission, and in a catch-up it needs one authorisation per filed report, not one for the exercise as a whole. Six years of late FBARs filed by an agent generate six authorisations. Sound practice is to hold each signed Form 114a alongside the account records for the same year, so the authorisation and the evidence it supports carry the same retention date. If a spouse relies on a single joint FBAR, the absence of a signed Form 114a is precisely the gap that turns one satisfied filer into two unsatisfied ones.

The 25-or-more-accounts rule is a reporting shortcut, not a records shortcut

FinCEN allows a filer with a financial interest in, or signature or other authority over, 25 or more foreign financial accounts to report basic information on the form rather than completing a separate detailed item for every account. High-net-worth filers with multiple UK current accounts, savings accounts, platform accounts and company accounts reach that count more often than they expect, particularly once signature-authority-only accounts are counted.

The relief stops at the form. FinCEN guidance and the Internal Revenue Manual both confirm that such filers must still comply with the recordkeeping requirements and must provide detailed information on each account if the IRS or FinCEN requests it. In practical terms the 25-or-more election increases records risk rather than reducing it, because the detail that would otherwise have been captured on the form now exists only in the private file. Anyone using that election should hold the following.

A standing schedule of every account, listing the five required data points for each reporting year.
The supporting statements or institution confirmations behind each maximum value figure.
A note of when each account was opened, closed or transferred, so the account count for each year can be reconstructed.
For each year, evidence of the basis on which the 25-or-more election was available, since the count is tested year by year.

What records do you need to file a late FBAR on UK accounts?

Where you have not been contacted by the IRS about a delinquent report and are not under civil examination or criminal investigation, the route for unfiled reports is to file them through the BSA E-Filing System and give a reason for late filing, selecting from the drop-down options provided or choosing the other option and setting out a written explanation. Where you also have unreported income or unfiled returns and your conduct was non-willful, the Streamlined Filing Compliance Procedures remain the structured route, and for a filer resident outside the United States that means three years of returns, six years of FBARs and a signed Form 14653 certification. Before any of that is submitted, the records need to exist.

For a UK account set, the working file for each catch-up year should contain the following.

Twelve months of statements for every reportable account, not just year-end statements, so the true annual peak is visible.
A written confirmation from the institution of the account name, number, branch address and account type, which is the cleanest evidence of the non-numeric data points.
Closure statements and final balances for accounts closed mid-year, which remain reportable for the year in which they were held.
The exchange rate source and date used to convert sterling maximum values into US dollars, recorded consistently across all years.
For signature-authority-only accounts, the document that conferred authority, such as a bank mandate or a board minute of the relevant company.
The signed Form 114a for that year, plus the BSA E-Filing acknowledgement once the report is submitted.

Assemble this before filing rather than after. Maximum values entered on a late FBAR are difficult to revise convincingly, and a figure produced from a partial statement run is a figure you may later have to defend.

Worked example: a six-year catch-up on a UK account set

The following is an illustrative example only, using round figures. Assume a US citizen who has lived in London for a decade, works in corporate finance, and has never filed an FBAR. Her UK accounts across the period are a joint current account with her UK-national spouse, a personal savings account, a cash and securities account on a UK investment platform, a second savings account she closed in 2022, and the operating account of a UK company where she is a director and sole signatory but holds no shareholding. Aggregate values exceeded the 10,000 US dollar threshold in every year.

Working in August 2026, the six most recent years for which the FBAR due date has passed are calendar years 2020 through 2025, with due dates of 15 April 2021 through 15 April 2026. That is thirty account-years of records, not six, because each account has to be evidenced separately for every year it was held. The closed savings account still generates records for 2020, 2021 and 2022. The company operating account generates records for all six years because signature authority alone is reportable. The joint current account generates records that the position of her spouse does not satisfy, because she has a financial interest in it in her own right.

The retention consequences run forward, not backward. The 2025 records must be preserved until 15 April 2031, five years from the due date for that year. The 2020 records had a retention window that closed on 15 April 2026, which is before she filed at all. She should nevertheless retain them, for the reason set out below.

What if the UK bank retention window has already closed?

This is the gap that derails most UK catch-ups, and it is a genuine conflict of law rather than administrative reluctance. Under regulation 40 of the Money Laundering, Terrorist Financing and Transfer of Funds (Information on the Payer) Regulations 2017, as published on legislation.gov.uk, a UK institution must keep customer due diligence and transaction records for five years beginning with the date it knows or has reasonable grounds to believe the business relationship has ended or the occasional transaction was completed, and once that period expires it must delete personal data obtained for those purposes unless another enactment, court proceedings or the consent of the customer requires retention. Transaction records within a business relationship are not to be kept beyond ten years.

So a UK bank is under a deletion obligation on roughly the same five-year rhythm as the FBAR retention rule, measured from account closure rather than from a US filing due date. For an account closed in 2022, the window of the institution may close in 2027. For an account closed in 2019, the data may already be gone. Where that window has passed, the reconstruction options are as follows.

A data subject access request. GOV.UK confirms an organisation must provide a copy of the personal data it holds as soon as possible and within one month at most, extendable by up to two further months for complex requests, usually free although an administrative charge is possible in some circumstances. A subject access request reaches data the institution still holds; it cannot resurrect data lawfully deleted.
Archived digital banking exports, PDF statements already downloaded, and email confirmations of transfers, which frequently survive in personal storage long after the copy held by the bank has gone.
Corroborating documents that fix a balance at a point in time, such as a mortgage or lending application, a source-of-funds letter, or a completion statement.
UK tax records. HMRC guidance at GOV.UK asks Self Assessment taxpayers to keep records for at least 22 months after the end of the tax year where the return was filed on time, or at least 15 months after filing where it was late, with longer periods for self-employment and property income, so interest certificates and dividend records for reportable UK accounts are often in the files of the taxpayer even when those of the bank are not.
A contemporaneous written reconstruction, prepared and dated, setting out the sources used, the balances they establish, the gaps, and the conservative assumption adopted for each gap.

A documented, conservative reconstruction with its methodology stated is a defensible record. An unexplained round number is not. Where a figure is an estimate, say so in the file and say why, and keep the primary material that supports it.

Signature authority only: accounts held through a UK company

Founders, owner-managers and executives regularly hold signature or other authority over the accounts of a UK company without any financial interest in the accounts themselves. That authority is reportable, and the records duty attaches to it in the same terms as to a personally owned account, because 31 CFR 1010.420 covers each person having a financial interest in or signature or other authority over the account.

The officer or employee exception is the only relief, and it presupposes an employer that keeps the records. Two situations fall outside it in substance. The first is the owner-manager of their own UK company, where treating the company as the record keeper is a formality that leaves nobody actually holding the file. The second is the departed executive, who no longer has access to the banking records of a former employer but whose FBAR years remain open to enquiry. In both cases the individual should hold, for each reporting year, the account name, number, branch address and type, the mandate or board resolution conferring authority, and the maximum value figure with its support. Where the exception is being relied on, obtain written confirmation from the company that it holds the records for the relevant years, and keep that confirmation.

One further point on the count: signature-authority-only accounts are included when testing whether a filer has 25 or more accounts, so a director with signing rights across several UK group companies can trip that threshold on corporate accounts alone.

How the retention clock interacts with a six-year catch-up

Very little published material addresses the mismatch that a catch-up creates, and it is the single most useful thing to understand. The retention clock runs from the FBAR due date for each year, so a six-year catch-up produces six different retention end dates, the latest of which sits five years beyond the most recent year filed. The file cannot be closed when the reports are filed. Using the illustrative timeline above, records first assembled in 2026 for calendar year 2025 must be held until 2031.

Separately, the period for assessing FBAR civil penalties is six years, running under 31 USC 5321(b)(1) from the date of the transaction to which the penalty relates, which for a report filing violation is the FBAR due date. Six years of exposure against five years of mandated retention leaves a window in which the assessment period is still open while the retention period has lapsed. For the oldest year in a catch-up that window is not theoretical: it is the year most likely to be examined and the year whose records are hardest to obtain.

The practical conclusion is that the five-year rule should be treated as a statutory minimum rather than a disposal schedule. For any year filed late, retain the underlying records until the assessment period for that year has run and any enquiry is concluded. Destroying the 2020 file in 2026 because the regulation no longer compels its retention removes the only evidence available for the year still open to assessment.

What happens if the records are not there when the IRS asks?

A recordkeeping failure is a violation of 31 USC 5314 in its own right and is penalised under the same authority as a reporting failure, 31 USC 5321(a)(5). The Internal Revenue Manual sets the violation date for a recordkeeping violation at the date the records are first requested by summons by the examiner, where they are not then provided, and explains that this timing prevents a filer from manipulating account balances after a request has been made.

That timing rule has a consequence worth stating clearly. A recordkeeping violation does not date from the year the records related to; it crystallises when the request goes unanswered. Exposure therefore cannot be run off simply by waiting. On amounts, the statutory framework provides a base penalty of 10,000 US dollars for a non-willful violation and, for a willful violation, the greater of 100,000 US dollars or 50 per cent of the account balance, with both figures subject to annual inflation adjustment under the Federal Civil Penalties Inflation Adjustment Act. The IRS also confirms that criminal violations of the FBAR rules can result in a fine, imprisonment of up to five years, or both.

Against that, the IRS states that it will not penalise a person who properly reports a foreign financial account on a late-filed FBAR where the IRS finds reasonable cause for the late filing. Reasonable cause is a factual determination, and the facts are evidenced by records. A complete file is the mechanism by which that position is established rather than merely asserted.

Building a missed FBAR recordkeeping file that holds up

Treat the records as a permanent compliance asset organised by reporting year rather than by account, because that is how an examination is structured. For each year, the file should be self-contained and reconcile to the report as filed.

One folder per calendar year, containing a schedule of every reportable account with the five required data points and the maximum value in both sterling and US dollars.
The supporting statements for each account, covering all twelve months and clearly identifying the peak month.
The exchange rate source, rate and date applied, used consistently across every year in the catch-up.
The signed Form 114a for that year and the BSA E-Filing acknowledgement with its identifier.
The reason given for late filing, and any written explanation submitted, so the position taken for each year is preserved.
A dated methodology note wherever a figure was reconstructed rather than taken from a statement, identifying the sources used and the assumptions adopted.
A calendared retention date for each year, set at five years from the FBAR due date for that year and extended to cover the assessment period.

For a high-net-worth filer with UK accounts, the deciding factor in a late-FBAR exercise is rarely the arithmetic. It is whether the numbers on the form can be traced to primary evidence, year by year and account by account, at the moment FinCEN or the IRS asks. The regulation sets a five-year floor. The catch-up sets the real horizon, and it is longer.