Missed FBAR? HMRC Offshore Letter Checklist for US Citizens

If an HMRC offshore letter has arrived with a schedule of your accounts and you are a US citizen, treat that schedule as the starting point for a missed FBAR review, not the finish line. Reconcile every listed account against your FBAR and Form 8938 history, add the accounts HMRC never mentions, then correct both countries in one consistent sequence.

The newer versions of these letters are more specific than the generic nudges of a few years ago. They reportedly attach a schedule naming each institution that supplied data, a description of the amount reported and the year it relates to. For a UK-resident American that schedule is useful, because it is a ready-made list of non-US accounts. It is also dangerous if you read it as complete. This guide explains how we at Jungle Tax turn the schedule into a working checklist for both HMRC and the IRS, and where the two systems pull in different directions.

What does an HMRC offshore data schedule actually tell a US citizen?

It tells you which overseas institutions have reported an account in your name to HMRC, roughly how much was reported and for which year. It does not tell you what the IRS knows, whether you filed an FBAR, or whether accounts outside the schedule exist. Treat it as one data source among several, not a verdict.

The letter itself makes the same point. It asks the recipient to check that all UK liabilities have been declared, not only those connected to the listed items. For an American, that instruction has a second meaning. Every account that sits outside the United States is potentially reportable to the US Treasury on FinCEN Form 114, the FBAR, whether or not HMRC has ever heard of it.

Three practical limitations shape how we use the schedule:

• It is built from offshore data. The schedule reflects information HMRC holds about accounts outside the UK. Your ordinary UK current account, a UK ISA or a UK workplace pension will not normally appear, yet each is a foreign account from the IRS point of view.
• The amount is a description, not your FBAR figure. An institution may report a year-end balance, income paid or gross proceeds. The FBAR asks for the maximum value during the calendar year, which is often higher.
• The year may not match either tax year. Institutional reporting is usually by calendar year. The UK tax year runs from 6 April to 5 April. The FBAR follows the calendar year, as does the US income tax return. Mapping each scheduled line to the right UK and US year is part of the job.

Does an HMRC letter mean the IRS already knows about my accounts?

Not necessarily, and you should not assume it either way. The HMRC letter is a UK compliance exercise about UK tax. Nothing in it says the schedule has been shared with the IRS. What matters for the US side is your own filing record, and whether the IRS itself has opened an examination.

That said, foreign banks have their own reporting duties towards the US under FATCA, and UK and US tax authorities do exchange information under their agreements. A sensible working assumption is that the IRS may hold some data about your non-US accounts today or may receive it later, entirely independently of the HMRC letter. That is a reason to act on the US side while you still control the timing, not a reason to panic.

Why is an HMRC letter not IRS contact for streamlined purposes?

The IRS streamlined eligibility rules turn on action by the IRS itself. Its own page says a taxpayer is ineligible if the IRS has begun a civil examination of their returns for any year, or if they are under investigation by IRS Criminal Investigation. A letter from HMRC is neither of those.

We are careful not to stretch this further than the wording supports. The IRS streamlined filing compliance procedures page excludes taxpayers where the IRS "has initiated a civil examination", and it applies that bar whether or not the examination concerns foreign assets. It does not list correspondence from a foreign tax authority as a disqualifier. So an HMRC nudge, on its own, should not close the streamlined route. If, separately, you have received an IRS examination notice for any year, the analysis changes completely and needs individual review before anything is filed.

Which accounts must be on an FBAR even if HMRC never listed them?

Any non-US financial account in which you held a financial interest or signature authority, once the combined maximum value of all such accounts exceeded $10,000 at any point in the calendar year. That includes UK accounts, joint accounts, accounts you can sign on but do not own, and accounts closed during the year.

These are the categories we most often find missing from a client's own list, and none of them depend on HMRC's schedule:

UK domestic accounts

Current accounts, savings accounts, premium-rate deposit accounts, stocks and shares ISAs, cash ISAs, general investment platforms and many UK pension arrangements are all outside the United States. They are the core of most UK-resident Americans' FBARs and will rarely, if ever, show up on an offshore schedule because, to HMRC, they are not offshore. An ISA is a particular trap. It is tax-free in the UK, so it feels invisible, but the US gives it no special status and the account, and usually its income, must be reported.

Joint accounts

A joint account with a non-American spouse is fully reportable by the US citizen at its full maximum value, not half. The schedule may list it under your spouse's name only, or not at all.

Signature authority without ownership

Executives and founders often hold signing rights over company or entity accounts. Signature authority alone can trigger an FBAR line, subject to specific exceptions in the instructions. These accounts are never on a personal HMRC schedule because the income is not yours.

Closed and dormant accounts

An account closed in 2022 still belongs on the 2022 FBAR if it was open at any time that year and the aggregate threshold was crossed. Clients frequently omit an account because it no longer exists.

Accounts below UK interest but above the US threshold

The FBAR threshold is an aggregate test. Five accounts of $3,000 each produce an FBAR filing obligation for all five. An account that generated trivial interest, and therefore no meaningful UK tax issue, can still be a missing FBAR line.

How do US and UK reporting of the same account compare?

The two systems ask different questions about the same money. HMRC wants the income and gains taxed correctly. The US wants the income taxed and, separately, the account itself disclosed. The table below sets out the differences that most often cause one country's filing to contradict the other.

Point of comparison	UK (HMRC)	US (IRS and FinCEN)
What is reported	Income and gains, on the Self Assessment return	Income on Form 1040, plus the account itself on the FBAR and, above higher thresholds, Form 8938
Reporting period	Tax year 6 April to 5 April	Calendar year for both the FBAR and Form 1040
Which accounts count	Worldwide income for UK residents; the offshore schedule covers non-UK accounts only	Every account outside the United States, including all UK accounts
Value figure	Not required for most accounts; the WDF asks for the maximum value of offshore assets in the last five years	Maximum value during the calendar year, converted to US dollars at the Treasury year-end rate
ISA treatment	Income and gains exempt from UK tax	No exemption; income taxable and the account reportable
Correction route for past errors	Worldwide Disclosure Facility for offshore matters	Streamlined Foreign Offshore Procedures for non-wilful failures by qualifying non-residents
Behaviour assessment	Taxpayer self-assesses behaviour, which sets the years and penalty	Taxpayer certifies non-wilful conduct on Form 14653 under penalties of perjury

How do I reconcile the schedule against my FBAR and Form 8938 history?

Build a single account-by-year grid. List every scheduled account first, then every account you know of that is missing, then fill in the maximum value, the FBAR status and the Form 8938 status for each calendar year. The gaps in that grid are your US correction list.

This is the sequence we follow when preparing a reconciliation:

1. Transcribe the schedule exactly. Copy each institution, amount description and year into the grid without editing. Keep a note of what the amount describes, because it will rarely be the FBAR maximum.
2. Add every unscheduled account. Work through UK bank statements, ISA and platform statements, pension statements, employer equity accounts held abroad, joint accounts and any signing mandates. Include closed accounts.
3. Pull your FBAR filing history. Use your own BSA E-Filing confirmations or your preparer's records. Do not rely on memory, as partial filings are common.
4. Pull your Form 8938 history. Check which years a Form 8938 accompanied the 1040 and which accounts it listed. For a US citizen living abroad, the form applies once specified foreign assets exceed $200,000 at year end or $300,000 at any time if single, or $400,000 and $600,000 if married filing jointly.
5. Obtain maximum values. Request the highest balance for each calendar year from each institution, or derive it from monthly statements, then convert using the Treasury year-end rate.
6. Test the aggregate threshold year by year. If the total of all maximum values exceeded $10,000 in a year, every account belongs on that year's FBAR.
7. Flag income consequences. For each account and year, note whether the income or gains were on the UK return, the US return, both or neither. This feeds the WDF and the amended or delinquent 1040s.
8. Record the reason each item was missed. Write one plain sentence per gap. These sentences become the raw material for a consistent non-wilful narrative.

In what order should the WDF disclosure and the streamlined filing be made?

Prepare both together from one account inventory, but settle the UK figures first. UK tax paid on a disclosure can usually be credited against US tax on the same income, so the US returns depend on the UK numbers. Submit the two packages close together so neither tells a different story.

There are three reasons the order matters.

Foreign tax credits flow from the UK figures

Where the WDF results in extra UK tax on interest or gains, that tax is usually what reduces or removes the US liability on the same income on the 1040s filed under the streamlined procedures. Finalising the US returns before the UK numbers are settled risks overpaying US tax or having to amend again.

The behaviour you describe to HMRC must match the certification you sign for the IRS

The WDF asks you to assess your own behaviour, and that assessment drives how many years you disclose and the penalty level. The streamlined procedures require a Form 14653 statement that your US failures were non-wilful, meaning due to negligence, inadvertence, mistake or a good-faith misunderstanding. If your UK disclosure states that an offshore account was deliberately left off your tax returns, a US certification describing the same account as an innocent oversight is an obvious contradiction. The two standards are not identical, and a careless UK error can sit comfortably with a non-wilful US position, but the facts in each narrative must be the same facts.

Timing on the UK side is fixed once you notify

Under HMRC's Worldwide Disclosure Facility guidance, once you notify through the Digital Disclosure Service and receive your disclosure reference, you have 90 days to make the disclosure, with the possibility of asking for a further 90 in complex cases. That window is usually enough to prepare the US package in parallel, which is why we gather all US data before notifying, not after.

For the UK detail of the WDF itself, including behaviours and penalty ranges, see our guide to missed UK tax returns and the HMRC nudge letter route through the Worldwide Disclosure Facility. If your letter concerns US-source income rather than offshore accounts, the separate guide to the HMRC one-to-many letter on US-source income covers that variant.

What does the Streamlined Foreign Offshore Procedure require?

Three years of US income tax returns, six years of FBARs, full payment of US tax and interest, and a signed Form 14653 certifying non-wilful conduct. You must also meet the non-residency test. For qualifying filers, the IRS does not impose failure-to-file, accuracy, information return or FBAR penalties on the covered years.

The detailed rules sit on the IRS page for US taxpayers residing outside the United States. In outline:

• Non-residency. A US citizen must have had no US abode and have been physically outside the US for at least 330 full days in at least one of the three most recent years. Most long-term London residents meet this easily, but founders who split time with the US should count days carefully.
• Returns. The three most recent years whose due date, including a properly obtained extension, has passed. Delinquent returns or amended returns, with the information returns that should have been attached, including Form 8938 and, where relevant, Form 5471.
• FBARs. The six most recent years whose FBAR due date has passed, filed electronically through BSA E-Filing.
• Payment. All US tax and statutory interest for the three years, paid with the submission.
• Certification. An original signed Form 14653 with a factual explanation of why the failures happened.

For a submission made in late 2026, the window will normally cover the 2023 to 2025 tax returns and the 2020 to 2025 FBARs, but the exact years depend on filing dates and extensions, so confirm them for your own facts.

Can I just file the late FBARs now without the streamlined procedure?

You can file late FBARs, but there is no longer a published IRS procedure promising that a late FBAR will not be penalised. The IRS removed its Delinquent FBAR Submission Procedures page on 1 July 2026, and it has not published a replacement. Late filing now relies on general reasonable-cause principles.

Before that change, a taxpayer whose only failure was the FBAR itself, with all income correctly reported and taxed, could file late FBARs with an explanation and generally expect no penalty, provided the IRS had not already been in touch. That published safe harbour is gone. It does not follow that every late FBAR will be penalised, and the underlying FBAR rules have not changed. But you can no longer point to a specific IRS page that gives the assurance.

For a UK-resident American who has an HMRC letter in hand, the FBAR-only case is less common than it looks. If an ISA, a premium deposit account or an offshore investment account produced income that never reached a US return, there is also a tax failure, and the streamlined route is normally the more complete answer because it deals with both returns and FBARs and carries a penalty waiver for qualifying filers. The decision depends on your facts and should be made once the reconciliation grid is complete, not before.

What penalties are at stake for a missed FBAR?

Non-wilful FBAR violations carry a civil penalty that is inflation-adjusted from a $10,000 base, and the US Supreme Court decided in 2023 that this applies per annual report, not per account. Wilful violations are far heavier, potentially the greater of an inflation-adjusted $100,000 base or half the account balance.

Form 8938 failures carry their own separate penalty starting at $10,000, with further amounts if the failure continues after IRS notice. You can model the FBAR side with our FBAR penalty calculator, but treat its output as an indication of exposure, not a prediction. For qualifying filers, the foreign offshore route is designed precisely so that none of these apply to the covered years.

Worked example: a London-based American with five accounts, two missing from the schedule

The following figures are invented for illustration only. Consider a hypothetical US citizen, resident in London since 2016, working as a senior executive. They have never filed an FBAR or Form 8938. They have filed UK Self Assessment returns, and they filed US returns showing salary only, with the foreign earned income exclusion. In 2026 they receive an HMRC offshore letter with a schedule listing three items.

They hold five accounts outside the United States:

Account	On HMRC schedule?	Max value 2024 (USD)	Income on UK return?	Income on US return?	FBAR filed?
A. Jersey sterling deposit account	Yes (2022 to 2024)	$410,000	No	No	No
B. Guernsey investment custody account	Yes (2023, 2024)	$620,000	Partly	No	No
C. Irish deposit account, closed 2023	Yes (2021, 2022)	Closed (2022 max $95,000)	No	No	No
D. UK stocks and shares ISA	No	$240,000	Exempt in UK	No	No
E. Joint UK current account with non-US spouse	No	$85,000	Yes (their share)	No	No

UK side. Accounts A and C produced interest that was never on the UK return, and part of the Guernsey income was omitted. Those three items are the substance of the WDF disclosure. The ISA is correctly exempt in the UK, and the UK interest on the joint account was declared, so D and E create no UK tax issue at all. If the executive only answered HMRC's schedule, the UK file would be complete.

US side. All five accounts are foreign accounts. In 2024 the aggregate maximum value was well over $1.3 million, so every account belongs on the 2024 FBAR, and the joint account goes on at its full value, not half. Account C belongs on the FBARs for the years it was open, including 2023, the year it closed. The ISA dividends and gains, and the full interest on all five accounts, were missing from the 1040s. With specified foreign assets well above the $200,000 year-end threshold for a single filer abroad, Form 8938 was also required for the recent years. Depending on the underlying holdings, the ISA and the Guernsey account may contain non-US funds that raise further US reporting questions, which need to be checked line by line.

Reconciliation outcome. The schedule identified three accounts. The full US correction involved five, and the two that HMRC never mentioned, the ISA and the joint account, account for a significant share of the missing US income and FBAR lines. The UK disclosure was settled first, giving the UK tax figures that fed the foreign tax credit calculations. The Form 14653 narrative described the same facts HMRC was told: the executive believed that UK-taxed or UK-exempt savings had no US consequence and did not realise that accounts outside the US had to be listed separately. Nothing in either submission contradicted the other.

What should the Form 14653 narrative contain?

A specific, honest, first-person account of why each failure happened, who you relied on, what you knew, and what changed. It should name the types of accounts and years involved. Generic statements that you "did not know" without supporting detail invite questions.

The IRS instructions ask for the specific reasons for the failures, including favourable and unfavourable facts. In a UK context, helpful facts are often real: UK tax was paid on most of the income, a UK accountant handled the UK return and was never asked about US reporting, or ISAs were assumed to be tax-free everywhere. Unhelpful facts must be addressed, not omitted, especially if your UK disclosure has already put them on record. If you previously filed a US return that answered the Schedule B foreign account question, that answer will need explaining.

Checklist: turning the HMRC schedule into a complete US and UK file

• Confirm no IRS civil examination or criminal investigation is open for any year.
• Transcribe the schedule line by line, with the year and amount description.
• Add every UK account, ISA, pension, joint account, signing mandate and closed account.
• Obtain calendar-year maximum values and convert at Treasury year-end rates.
• Map each scheduled year to the correct UK tax year and US calendar year.
• Identify every income item missing from the UK return, the US return or both.
• Count days outside the US to confirm the 330-day non-residency test.
• Settle the UK disclosure figures before finalising US foreign tax credits.
• Draft one factual account of what went wrong and use it for both the WDF behaviour assessment and Form 14653.
• Prepare FBARs, 1040s with Form 8938 and other information returns, and the payment, then submit both packages close together.

How Jungle Tax prepares a combined HMRC and IRS response

We work from one master inventory for both countries, so the account values, income figures and narrative you give HMRC are the same ones the IRS receives. Our UK and US preparers handle the WDF disclosure and the streamlined package together, which avoids the most common failure in these cases: two separate advisers, two separate account lists and two stories that do not match. More detail on our approach sits on our US-UK tax accountants and high-net-worth pages.

If an HMRC letter with an account schedule is sitting on your desk and you are a US citizen, the first step is a confidential review of every account, not just the listed ones, before anything is filed with either country. Contact our cross-border team to arrange a discreet consultation, and we will tell you what needs correcting, in which order, and on what timetable.