Does each partner bank on a UK savings platform need its own FBAR line?

Usually, yes. If each partner bank holds the deposit in your own name, each is a separate foreign financial account and gets its own line with that bank's name and reference. If the platform holds deposits as nominee, you still have a financial interest under 31 CFR 1010.350, and the conservative approach is to list each identifiable underlying deposit while keeping the full schedule on file.

Is a missed FBAR filed with the IRS or with FinCEN?

A missed FBAR is filed electronically with FinCEN through the BSA E-Filing System, not with the IRS or attached to Form 1040. For a report filed after the October 15 extended due date, you select a reason for late filing or choose other and give a written explanation. Under the Streamlined procedures, you select other and enter Streamlined Filing Compliance Procedures.

How do I value a fixed-term bond that matured and returned to the hub account?

Report the bond at its maximum value during the calendar year, which is normally the balance immediately before maturity, including any interest credited to it. The hub account is reported separately at its own highest balance. Convert every sterling maximum using the Treasury Reporting Rate of Exchange for 31 December of that year, not the rate on the maturity date.

Does the UK Personal Savings Allowance make platform interest tax-free in the US?

No. The Personal Savings Allowance of £1,000 for basic rate and £500 for higher rate taxpayers, with nothing for additional rate taxpayers, is a UK relief only. A US citizen reports all platform interest on Form 1040. Where UK tax was paid, a foreign tax credit on Form 1116 can offset US tax, but interest covered by the UK allowance usually has no UK tax to credit.

What happens if I have 25 or more platform accounts in one year?

On FinCEN Form 114 you check yes at Item 14a, enter the total number of accounts and leave Parts II and III blank. You must still keep detailed records of every account, including institution, account number, type and maximum value, for five years, and provide them if FinCEN or the IRS asks. The simplified form does not reduce what you must track.

Does Bittner v. United States reduce penalties for many platform accounts?

Yes, for non-willful cases. In Bittner v. United States, decided on 28 February 2023, the Supreme Court held that the non-willful FBAR penalty applies per report, not per account. A saver with 14 unreported deposits in one year faces at most one non-willful penalty for that year's report. Willful penalties and Form 8938 penalties are unaffected by the ruling.

Missed FBAR on UK Cash Deposit Platform Accounts

A Missed FBAR on a UK cash deposit platform is one of the most common gaps we find when a US citizen living in Britain moves serious savings onto a single hub account that spreads the money across a dozen or more partner banks. The short answer: every foreign financial account in which you have a financial interest counts toward the $10,000 aggregate test, and depending on how the platform holds the money, each partner-bank deposit can be a separate reportable account on FinCEN Form 114. The fix is to rebuild the account list, value each deposit correctly and file the late reports through FinCEN's BSA E-Filing System, usually inside the Streamlined Filing Compliance Procedures where the failure was non-willful.

This guide is written from the tax preparation side. In the returns we prepare for high-net-worth savers, cash platforms rarely feel like foreign accounts to the client: there is one login, one app and one consolidated statement. FinCEN does not look at the login. It looks at who holds legal title to each deposit, and at the maximum value each deposit reached during the calendar year.

What Is a UK Cash Deposit Platform, and Why Do Wealthy Savers Use One?

A cash deposit platform is a savings service that gives the customer one hub cash account and, from it, places money into fixed-term bonds, notice accounts and easy-access accounts offered by a panel of partner banks and building societies. When a deposit matures, the money sweeps back to the hub and is either paid out or reinvested with another partner bank. The appeal for wealthy UK residents is simple: one onboarding process, rate shopping across many institutions, and a practical way to keep each slice of cash within the Financial Services Compensation Scheme limit.

The FSCS protects eligible deposits up to £120,000 per eligible person, per authorised firm, a limit that took effect on 1 December 2025 according to https://www.fscs.org.uk/what-we-cover/banks-building-societies-credit-unions/deposit-limit/. Brands that share one banking licence count as a single firm for that limit, and certain temporary high balances, such as proceeds of a home sale, can be protected up to £1.4 million for up to six months. A saver with £1 million of cash therefore has a natural incentive to hold nine or ten separate deposits at different licensed banks. That is exactly the pattern that multiplies FBAR lines.

Is Each Partner-Bank Deposit a Separate Foreign Financial Account?

The answer depends on the legal structure the platform uses, and the platform terms and conditions tell you which one applies. There are two broad models, and FinCEN's definition of financial interest in 31 CFR 1010.350 treats both as reportable by the US saver, though they change what goes on each line.

Model one is the direct model. The partner bank opens the deposit in the customer's own name, the customer is the owner of record, and the platform acts as an introducer and administrator. Here each deposit is a separate account at a separate foreign financial institution. The FBAR line should carry the partner bank's name and address and the account number or reference the bank uses. The hub cash account, if it is itself a UK bank account in the customer's name, is a further line.

Model two is the nominee or client money model. The platform, or a custodian bank it appoints, holds the deposits at each partner bank in its own name on behalf of its customers, typically in designated client accounts, and the customer's entitlement is recorded on the platform's books. The customer is not the owner of record at the partner bank. However, the FinCEN FBAR filing instructions state that a US person has a financial interest in an account where the owner of record or holder of legal title is an agent, nominee, attorney, or a person acting in some other capacity on behalf of the US person. A nominee holding your deposit for you does not remove the reporting obligation; it simply means the legal title sits with someone acting on your behalf.

In practice, under model two the preparer must decide how to describe the accounts. The conservative approach we take is to report each underlying partner-bank deposit that is identifiable on the platform statements as its own account, naming the partner bank as the institution, because that is where the value sits and where maturity events happen. Where the platform only reports a single pooled client position, we report that position with the platform or custodian as the institution and keep the underlying deposit schedule in the file. Either way, the aggregate test includes the full value you are entitled to.

Read the platform terms: look for words such as owner of record, nominee, custodian, client money and designated client account.
Check whether each partner bank sent you its own welcome letter, account number or annual interest statement. If it did, you are usually the owner of record at that bank.
Check whether the hub cash account is a bank account in your name or a client money balance held by the platform.
Keep a schedule of every deposit: partner bank, reference, product type, opening date, maturity date and maximum balance.

How Does the $10,000 Aggregate Test Work Across a Hub and Partner Banks?

The IRS summary at https://www.irs.gov/businesses/small-businesses-self-employed/report-of-foreign-bank-and-financial-accounts-fbar confirms the threshold: a US person must file if the aggregate value of their foreign financial accounts exceeded $10,000 at any time during the calendar year. The FinCEN instructions explain the mechanics: value each account separately at its maximum, convert to dollars, then add the maximum values together. If the total exceeds $10,000, an FBAR is required and every account must be reported, including a deposit that only ever held a few hundred pounds.

A gap angle that almost nobody explains for platform savers is double counting. When £100,000 sits in the hub in January and then moves into a partner-bank bond in February, the hub's maximum value and the bond's maximum value are both £100,000, so the aggregate of maximum values is £200,000 even though you never had more than £100,000. That is correct under the rules. The aggregate test is a filing threshold, not a measure of wealth, and for anyone with meaningful cash on a platform it will be exceeded by a wide margin. Do not try to net the figures down; report each account's own maximum.

How Do You Find Maximum Values When Deposits Matured Mid-Year?

The maximum value of an account, in FinCEN's words, is a reasonable approximation of the greatest value of currency or nonmonetary assets in the account during the calendar year, and periodic statements may be relied on provided they fairly reflect that maximum. For cash deposits the practical rules we apply are these.

Fixed-term bond that matured during the year: the maximum is normally the balance immediately before maturity, which is principal plus any interest credited to the account. If interest was paid away monthly to the hub, the maximum is usually the principal.
Bond opened during the year: the maximum is the opening deposit plus any interest credited before year end.
Notice and easy-access accounts: use the highest balance shown on the transaction history, not the 31 December balance.
Hub cash account: use the highest daily balance, which often occurs on the day a large deposit matures and before it is reinvested.
Closed accounts: an account that was opened and closed in the same year is still reported, at its maximum value.
Conversion: convert each sterling maximum to dollars using the Treasury Reporting Rates of Exchange for the last day of the calendar year, as the FinCEN instructions require, even if the deposit matured in March.

Platforms usually provide a downloadable transaction history for the hub and a maturity or closure statement for each product. Where a platform no longer shows closed products online, request the historic statements in writing. If the maximum genuinely cannot be established for an account and you have fewer than 25 accounts, the FinCEN instructions allow the amount unknown box in item 15a, but in our experience a reasonable reconstruction from deposit and maturity figures is almost always possible and is the better answer.

What Does the 25-or-More-Accounts Rule on FinCEN Form 114 Mean for Platform Savers?

Heavy platform users can reach 25 accounts faster than they expect, especially where maturing bonds are rolled to new partner banks within the same year. The FinCEN instructions for Item 14a say that a filer with a financial interest in 25 or more foreign financial accounts checks yes, enters the total number of accounts, and leaves Part II and Part III blank. That is a simplification of the form, not of the obligation.

The same instructions require the filer to keep detailed records of every account and to provide all of the omitted information if FinCEN or the IRS requests it. The general record-keeping rule is five years from April 15 of the year after the reporting year, covering the name on the account, the account number, the institution's name and address, the type of account and the maximum value. Checking the 25-or-more box without that schedule in the file is a common failure mode we see. Build the schedule first, count the accounts, then decide which form route applies.

Do Platform Deposits Also Go on Form 8938?

Often, yes. Form 8938, Statement of Specified Foreign Financial Assets, is filed with the Form 1040 and also covers deposit accounts held at foreign financial institutions. The thresholds are much higher than the FBAR test. For a taxpayer living abroad, the IRS comparison page at https://www.irs.gov/businesses/comparison-of-form-8938-and-fbar-requirements lists more than $200,000 on the last day of the year or more than $300,000 at any time for single filers, and more than $400,000 or $600,000 for married couples filing jointly. For taxpayers living in the United States the figures are $50,000 and $75,000 for single filers, and $100,000 and $150,000 jointly.

The two forms use different valuation approaches and different rules on what counts, so they will rarely show identical totals. For a nominee-held client money position, Form 8938 reporting still usually follows the underlying deposits you are entitled to. The IRS page lists a Form 8938 penalty of up to $10,000 for failure to disclose, with an additional $10,000 for each 30 days of non-filing after IRS notice, up to a further $50,000. If you are remediating a Missed FBAR on platform deposits, check every open year for a missing Form 8938 at the same time.

How Is UK Savings Interest Taxed on the US Return?

UK banks and building societies generally pay interest without tax deducted, and the UK then taxes it through the Personal Savings Allowance framework. GOV.UK at https://www.gov.uk/apply-tax-free-interest-on-savings/how-much-is-tax-free sets the allowance at £1,000 for basic rate taxpayers, £500 for higher rate taxpayers and nothing for additional rate taxpayers, with a separate starting rate for savings of up to £5,000 available only where other taxable income is below £17,570. Most of the platform savers we work with are additional rate taxpayers, so all of their interest is taxable in the UK.

The US return is a separate question. A US citizen is taxed on worldwide income, so every pound of platform interest is reported on Form 1040 in dollars, whether or not the UK taxed it. The UK allowance has no US equivalent. Where UK tax was paid on the interest, it can generally be claimed as a foreign tax credit in the passive category on Form 1116, which often removes most of the US tax for an additional rate payer. Where the interest fell within the UK allowance, or sat in a cash ISA, there is no UK tax to credit and the interest is fully exposed to US tax. Timing matters too: interest on a multi-year fixed-term bond may be credited annually or only at maturity, and the US return should follow the actual crediting pattern shown on the statements. A missing FBAR almost always travels with missing interest, so the remediation normally includes amended or delinquent returns.

How Do You Fix a Missed FBAR on Cash Deposit Platform Accounts?

There are two practical routes today, and the choice depends on whether income is missing from the returns and on the reason the reports were not filed.

Route one is a late FBAR filed directly through FinCEN's BSA E-Filing System. The FinCEN instructions say that a report filed after October 15 of the year following the reporting year must select a reason for late filing from the drop-down list, or select other and provide a written explanation. This route suits a saver whose returns already reported all the interest correctly and who simply did not know the deposits were reportable. The IRS FBAR page says that a person who has not been contacted by the IRS and is not under investigation should file delinquent FBARs promptly. Be careful about one point: the IRS withdrew its Delinquent FBAR Submission Procedures page around 1 July 2026, so we do not treat that as a live, named programme. A late filing through BSA E-Filing with a reason is still available, but it does not carry the specific penalty assurances the old page described.

Route two is the Streamlined Filing Compliance Procedures, which is the right route where interest is also missing from the returns and the failure was non-willful. For a UK resident, the Streamlined Foreign Offshore Procedures at https://www.irs.gov/individuals/international-taxpayers/us-taxpayers-residing-outside-the-united-states require at least 330 full days outside the United States and no US abode in at least one of the last three years, three years of delinquent or amended returns with all required information returns such as Form 8938, six years of FBARs, full payment of tax and interest, and a Form 14653 certification of non-willful conduct. Compliant filers receive relief from the FBAR and information return penalties. The late FBARs are filed through BSA E-Filing, selecting other as the reason and entering Streamlined Filing Compliance Procedures in the explanation box. US residents use the Streamlined Domestic Offshore Procedures, which carry a miscellaneous offshore penalty; the general framework is set out at https://www.irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures.

We cover eligibility in more depth at https://us-uktax.com/streamlined-foreign-offshore-procedures and https://us-uktax.com/irs-streamlined-filing, and you can size the exposure with https://us-uktax.com/calculators/streamlined-filing-calculator before any filing is made.

What Penalties Apply to a Missed FBAR, and Why Does Bittner Matter?

The statute in 31 U.S.C. 5321 sets a civil penalty for a non-willful failure to file of up to $10,000 per violation, a figure that is adjusted upward for inflation each year, and no penalty applies where there was reasonable cause and the balance is properly reported. A willful failure can be penalised at the greater of $100,000, also inflation-adjusted, or 50 percent of the account balance at the time of the violation, with possible criminal exposure. We quote the current inflation-adjusted amounts from the official annual adjustment at the time of filing rather than from memory.

For platform savers the key authority is Bittner v. United States, decided by the Supreme Court on 28 February 2023. The Court held that the non-willful penalty applies per report, not per account. Before Bittner, the government had argued that a filer with many unreported accounts faced a separate non-willful penalty for each account in each year. For someone with 14 or 30 partner-bank deposits that difference is enormous: the maximum non-willful exposure is one penalty per unfiled annual report, not one per deposit. Bittner does not touch willful penalties, and it does not reduce the Form 8938 penalty, which is separate.

Worked Scenario: A Missed FBAR Across 14 Platform Accounts

This is an illustration built from the pattern we see, not a real client. Assume a US citizen who has lived in London since 2016, is an additional rate taxpayer, and files US returns every year reporting salary and a UK current account on the FBAR. In 2023 she sold a property and placed £1.3 million on a cash deposit platform. For simplicity assume a Treasury year-end rate of $1.25 to £1 for every year; the real filing must use the published Treasury rate for 31 December of each year.

Her platform statements show 14 accounts across 2023 to 2025: the hub cash account, which peaked at £1.3 million on the day the sale proceeds arrived, and 13 partner-bank deposits of between £90,000 and £115,000 each, placed so that no licensed bank held more than the FSCS limit. Five of the deposits were one-year bonds that matured in 2024, with the proceeds swept back to the hub and left there. The terms show the direct model: each partner bank holds the deposit in her own name and issued its own reference number.

Accounts per year: 14 including the hub. That is under 25, so each account goes on its own Part II line with the partner bank's name, address and reference.
Hub maximum in 2023: £1.3 million, about $1,625,000 at the assumed rate. Partner-bank maximums add roughly £1.3 million more, so the aggregate far exceeds $10,000, which is expected.
Matured bonds in 2024: each is reported at its balance immediately before maturity, even though it was closed by 31 December, and the hub's 2024 maximum reflects the day the proceeds landed.
Interest: about £55,000 a year across all deposits in this illustration, taxed in the UK at the additional rate, but omitted from every Form 1040 she has filed since the sale.
Form 8938: as a UK resident married filing separately, she exceeded the $300,000 any-time test in each year, and no Form 8938 was filed.

Because interest is missing and the failure was non-willful, the Streamlined Foreign Offshore route fits. We prepare returns for the three most recent years whose due dates have passed, amending those already filed to add the interest, Form 1116 foreign tax credits for the UK tax paid, and Forms 8938; six years of FBARs, amending the years already filed to add any platform accounts; and a Form 14653 narrative explaining that she believed one app meant one UK account already covered by her FBAR. The foreign tax credit largely offsets the US tax on the interest, so the cash cost is modest compared with the penalty exposure she had without Bittner and without the programme. The accounts schedule is kept for five years.

Common Errors We See With Platform Accounts

Reporting only the hub account and assuming it covers every partner bank.
Using the 31 December balance instead of the maximum value, which understates bonds that matured mid-year and omits them entirely if they closed.
Converting at the exchange rate on the maturity date instead of the Treasury year-end rate.
Netting the hub and deposit balances to avoid double counting, which the rules do not permit.
Checking the 25-or-more box without holding the detailed account schedule.
Filing late FBARs but leaving the interest off the Form 1040, which leaves the income problem unresolved.
Describing the fix as the Delinquent FBAR Submission Procedures after that IRS page was withdrawn.

The UK side should be checked alongside the US filings. Platform interest must appear on the UK Self Assessment return where the Personal Savings Allowance is exceeded, and the UK tax figure feeds the US foreign tax credit. Our US return work is set out at https://us-uktax.com/us-tax-services and our UK compliance work at https://us-uktax.com/uk-tax-services. If you hold cash on a deposit platform and your FBARs list fewer accounts than your platform app shows, contact us at https://us-uktax.com/contact to rebuild the schedule before the next filing season.