Missed FBAR for US-Citizen Children With UK Accounts

Yes: a US-citizen child is a US person from birth, so a missed FBAR on a London-born child's UK savings, current or Junior ISA accounts is a real filing failure. A parent signs the child's FinCEN Form 114, and where the child also had unreported income, the child joins the family's streamlined submission with a separately signed Form 14653.

Most published guidance on late FBARs treats children in a single sentence: "minors must file too". That is accurate, but it is not enough for a family that has just discovered that two or three children, each holding UK accounts opened at birth, have never appeared on any US filing. The practical questions are more specific. Which child crosses the $10,000 line, and in which years? Does a child with a few hundred pounds of interest need a Form 1040? Who signs what? Does every child need their own certification, or does the parents' certification cover the household? This guide answers those questions in the order a family actually meets them, with a worked example and a decision table built for US-UK households.

Why are children the most commonly missed FBAR filers in US-UK families?

In our experience at Jungle Tax, children's accounts are missed for three structural reasons rather than through carelessness.

• The accounts were opened by default. A UK-born child typically acquires a savings account, a Junior ISA and often Premium Bonds within the first few years of life. Grandparents, godparents and the parents themselves top them up. Nobody thinks of these as "foreign financial accounts", because to the family they are simply the children's local accounts.
• Citizenship arrived quietly. A child born in London to an American parent who meets the transmission requirements is a US citizen at birth, whether or not a Consular Report of Birth Abroad has been obtained. The obligation exists from that day, not from the day the passport arrives.
• The parents' own compliance often looked complete. Many American parents in the UK file their own Form 1040 and FBAR every year. Their adviser may never have asked whether the children hold accounts, and the parents' FBAR does not, by itself, cover the child's obligation.

Balances also grow faster than families expect. A child's savings account plus a stocks and shares Junior ISA funded at or near the annual subscription limit for several years can pass $10,000 in aggregate well before secondary school.

Is a minor a US person with their own FBAR obligation?

Yes. The FBAR rules contain no age exemption. A US citizen of any age who has a financial interest in, or signature authority over, foreign financial accounts whose aggregate maximum value exceeds $10,000 at any time during the calendar year must report those accounts on FinCEN Form 114. The IRS FBAR overview sets out the threshold and the reporting test; it applies to an eight-year-old exactly as it applies to the parent.

Three consequences follow, and each one surprises families.

1. The child files their own FBAR. FinCEN's instructions place the responsibility on the child, and provide that where a child cannot file for any reason, including age, the parent, guardian or other legally responsible person files it for them. A child's accounts are not folded into a parent's report, and the joint-filing option on the FBAR is available only to spouses.
2. The parent may have to report the same account as well. If the parent can operate the child's account, which is typical for children's savings accounts and Junior ISAs where a parent is the registered contact, the parent may have signature authority over it. That account then belongs on the parent's own FBAR too, as a signature-authority account.
3. The aggregate test is applied per child. Each child's accounts are added together for that child alone. One child may need an FBAR in a given year while a younger sibling does not.

Which UK children's accounts count?

Broadly, anything held with a UK bank, building society, investment platform or fund manager in the child's name: current accounts, regular and easy-access savings, fixed-term children's bonds, cash Junior ISAs, stocks and shares Junior ISAs, and Premium Bond holdings, which are generally treated as reportable. Junior ISA status gives no shelter on the US side; the ISA wrapper is a UK concept and the IRS does not recognise it.

Who signs a child's FBAR, and how is it filed?

The FBAR is filed electronically through FinCEN's BSA E-Filing System; there is no paper option. For a child, the practical mechanics are as follows.

• The filer is the child. The child's name, date of birth and US taxpayer identification number go in the filer section. If the child does not yet have a Social Security number, obtaining one is the first workstream, because the child will need it for any Form 1040 and for the streamlined submission.
• The parent or guardian signs on the child's behalf. FinCEN's filing instructions direct a parent preparing a minor's report to identify the role in the filer-title field, using wording to the effect of "Parent/Guardian filing for child".
• Each account is listed with its maximum value during the year, converted to US dollars at the Treasury year-end reporting rate for that calendar year, and rounded up to the next whole dollar.
• For late reports within a streamlined submission, the reason for late filing is entered as "Other" with the explanation "Streamlined Filing Compliance Procedures". For FBAR-only corrections under the separate delinquent route, a reasonable-cause statement is attached instead.

A professional preparer can file on the family's behalf, but FinCEN Form 114a, the record of authorisation, must then be signed. For a minor, the parent signs that authorisation in the child's place, and both the parent and the preparer retain it.

Does the child also need a US tax return?

This is where most guides go quiet, and where the family's streamlined submission is actually settled. A US-citizen child is taxed on worldwide income, so UK interest, Junior ISA interest and fund distributions are all US-taxable income in the child's hands, even though they are tax-free or under the allowances in the UK.

The filing threshold for a dependent child

A dependent child must file a Form 1040 when their unearned income (interest, dividends, capital gains, fund distributions) exceeds an annually indexed threshold, which in recent years has sat at a little over $1,300. Separate thresholds apply where the child also has earned income, and the gross income test for a dependent combines the two. Because the figure moves each year, every year in the lookback period must be tested against that year's number, not today's.

Form 8615: the kiddie tax

Once a child's unearned income passes a second, higher threshold (in recent years roughly double the filing threshold), the excess is taxed at the parent's marginal rate rather than the child's. The child's return then includes Form 8615, which pulls in the parent's taxable income. For high-earning parents, that means the child's UK interest can be taxed at the top federal rate. The kiddie tax generally applies to children under 18 and to older full-time students within the age limits.

Form 8814: the parent's election

Where a child's income consists only of interest and dividends (including capital gain distributions) and falls below an indexed ceiling, a parent may elect on Form 8814 to report it on the parent's own return, and the child then files no return. For US-UK families this election is often less attractive than it looks:

• It can increase the parent's tax because the child's income is stacked on top of the parent's.
• It is unavailable if the child made estimated payments or had other income types, and PFIC distributions inside a stocks and shares Junior ISA complicate the calculation considerably.
• In a streamlined submission, moving the child's income onto the parent's amended or delinquent return changes the parent's tax figures and therefore the parent's own Form 14653 narrative. It must be decided before the returns are prepared, not after.

Foreign tax credits and the child

Because a UK child usually pays no UK tax on modest savings income, protected by their own personal allowance, the starting rate for savings and the personal savings allowance, there is generally no UK tax to credit. The parent's foreign tax credits cannot be borrowed for the child. In most years the US liability on a child's income is small, but the filing failure is still a failure, and it is the filing record, not the dollars, that drives the streamlined decision.

PFIC exposure in a child's Junior ISA

A stocks and shares Junior ISA almost always holds UK-domiciled OEICs, other collective funds or ETFs. For US purposes these are typically passive foreign investment companies, and the child is the shareholder. That can bring the excess-distribution regime and an annual Form 8621 per fund, subject to a de minimis exception for small holdings that has conditions of its own. A cash Junior ISA does not raise this issue; its interest is ordinary interest income. Our wider guide on ISA and PFIC reporting covers the elections and the reporting mechanics in detail; for present purposes, the point is that PFIC holdings can push a child into a return-filing obligation even where cash income is small.

How children fit into the Streamlined Foreign Offshore Procedures

The Streamlined Foreign Offshore Procedures require each participating taxpayer to meet the non-residency test, file the most recent three years of delinquent or amended returns and the most recent six years of delinquent FBARs, pay tax and interest, and submit a signed Form 14653 certifying that the failures were non-willful. Children who have lived in the UK all their lives will meet the non-residency test comfortably.

Every taxpayer certifies for themselves. A Form 14653 for the parents' joint return does not certify anything on the child's behalf, because the child is a separate taxpayer with a separate TIN, separate returns and separate FBARs. In practice the family pack is therefore organised as parallel sub-files.

When a child needs their own Form 14653

• The child had a 1040 filing requirement in any of the three return years and did not file, or had income that was not reported. The child participates in the streamlined procedure in their own right: delinquent returns, any Forms 8621, six years of FBARs, and a separate Form 14653 signed by a parent or guardian on the child's behalf. The certification's narrative should explain the child's position in plain terms: the accounts were opened for the child in infancy, the child had no understanding of US obligations, and the parents did not know the child's accounts were reportable.
• The child's only failure is the FBAR, all income was below the filing threshold or properly reported (for example through a valid Form 8814 election on the parent's return), and there is no tax to pay. This child is closer to the profile of the Delinquent FBAR Submission Procedures: late FBARs with a reasonable-cause statement, no certification of unreported income, and generally no penalty where the IRS has not already made contact.

Coordinating both routes inside one family submission is usual. What matters is that each child's facts are tested year by year, and that nothing in a child's paperwork contradicts what the parents certify about themselves.

Signing and marking the child's papers

Where a child cannot sign, the established IRS convention for a minor's return is that the parent signs the child's name followed by "By [parent's signature], parent for minor child". The same approach is generally applied to the child's Form 14653. The child's returns and each information return are marked "Streamlined Foreign Offshore" at the top of the first page, a copy of the child's Form 14653 is attached to each, and the original goes in the submission. The child's FBARs, filed electronically, reference the streamlined procedures in the late-filing explanation.

Worked example: two children, one family pack

A US-citizen parent and a British parent live in London. Both children were born in London and are US citizens. The parents discovered the children's position in October 2026 while preparing their own streamlined submission. For this example, assume a Treasury year-end rate of £0.80 per $1 (illustrative only; the published rate for each year is used in practice).

Account (2025 maximum value)	The older child (age 15)	The younger child (age 9)
Easy-access children's savings	£22,000	£3,500
Current account	£1,400	None
Cash Junior ISA	None	£9,000
Stocks and shares Junior ISA (two UK funds)	£18,500	None
Premium Bonds	£5,000	None
Aggregate maximum	£46,900 = $58,625	£12,500 = $15,625
2025 UK interest and distributions	About £1,340 (interest £920, fund distributions £420)	About £500 of interest
Approximate US dollar income	About $1,700	About $640

The older child crosses $10,000 in every year from 2020 onward, so six FBARs (2020 to 2025) are needed. Unearned income exceeded the dependent filing threshold in 2024 and 2025, and the two UK funds are PFICs, so the child has a 1040 requirement in at least two of the three streamlined return years. The older child enters the Streamlined Foreign Offshore Procedures with their own returns, Forms 8621 where required, six FBARs, and a Form 14653 signed by the US-citizen parent. Income sits below the kiddie tax threshold, so Form 8615 is not needed in this example. A Form 8814 election on the parent's return was considered and rejected because of the PFIC distributions.

The younger child crosses $10,000 only from 2023, when the cash Junior ISA balance grew. Three FBARs (2023, 2024 and 2025) are required. Income is below the filing threshold in every year, there is no US tax, and nothing was unreported. The younger child's late FBARs are filed with a reasonable-cause statement and no Form 14653.

The US-citizen parent is the registered contact on both children's savings accounts and can give instructions on them. Those accounts are added to the parent's own six years of FBARs as signature-authority accounts, alongside the parent's own UK accounts and pension.

Decision table: does this child need an FBAR, a 1040 or a 14653?

Child's facts in the year	FBAR (Form 114)	Form 1040	Form 14653
Aggregate UK accounts never above $10,000; income below the filing threshold	No	No	No
Accounts above $10,000; income below the filing threshold; no PFICs	Yes, filed by parent for the child	No	No; delinquent FBAR route
Accounts above $10,000; interest and dividends above threshold, income reported on a parent's Form 8814	Yes	No (parent's return carries it)	Child: no. Parent: covers it in their own certification
Income above the filing threshold, not reported	Yes, if over $10,000	Yes, delinquent	Yes, signed by parent for the child
Stocks and shares Junior ISA with UK funds	Yes, if over $10,000	Often yes, with Form 8621 analysis	Yes, where a return was required and missed
Unearned income above the kiddie tax threshold	Yes, if over $10,000	Yes, with Form 8615	Yes, where the return was missed

The UK side: what HMRC sees on a child's accounts

UK tax rarely bites on children's savings, but the UK picture still matters for the US filing, because it explains the facts behind the non-willfulness narrative and confirms that there is no UK tax to credit.

Issue	United States (IRS / FinCEN)	United Kingdom (HMRC)
Is the child a taxpayer in their own right?	Yes, from birth, on worldwide income	Yes, with their own personal allowance
Junior ISA	Fully taxable; funds usually PFICs	Tax-free; no reporting
Savings interest	Taxable from the first dollar; return needed above the dependent threshold	Usually covered by allowances
Account reporting	FBAR above $10,000 aggregate; Form 8938 only at much higher thresholds	No equivalent asset report for UK accounts
Who reports	The child, with a parent signing	The child or the parent, depending on where the capital came from
Bank reporting	UK banks identify US-person accounts and report them to HMRC, which shares them with the IRS	Same exchange, from the UK side

A UK-resident child has their own personal allowance, and savings income can also fall within the starting rate for savings and the personal savings allowance; the current figures are on the GOV.UK guidance on tax-free savings interest. Junior ISAs are outside UK tax altogether.

One UK rule deserves a brief mention for income reporting only. Where capital in a child's non-ISA account was provided by a parent and produces more than £100 of income in a tax year, HMRC treats the whole of that income as the parent's, not the child's, under the parental settlement rule. This changes who reports the income on the UK side; it does not change the US analysis, where the child remains the owner of the account and the reporting person for FBAR and Form 1040 purposes. The UK side of the family's returns should be checked at the same time so the two filings describe the same accounts consistently.

Exposure if the family does nothing

The non-willful FBAR penalty is capped at an inflation-indexed amount above $10,000 per late report, following the Supreme Court's 2023 decision in Bittner v. United States that the non-willful penalty applies per report rather than per account. In the worked example, nine missed child FBARs and the parent's own late reports could, in theory, produce substantial exposure. Our FBAR penalty calculator shows the order of magnitude. In practice, a complete and accurate streamlined submission made before the IRS makes contact is designed to remove that exposure, which is why timing matters: UK financial institutions already report US-person accounts, and a child's US passport can trigger that classification.

Assembling the family streamlined pack: a practical sequence

1. Confirm each child's status and TIN. Gather the Consular Report of Birth Abroad or passport, and apply for a Social Security number if the child does not hold one.
2. Inventory every account, by child, by year. Request year-end statements and the highest balance in each calendar year for six years. Closed and matured accounts count for the years they existed.
3. Run the $10,000 aggregate test per child per year at each year's Treasury rate.
4. Test each child's unearned income against that year's filing and kiddie tax thresholds, and identify PFIC holdings.
5. Decide the Form 8814 question before the parents' returns are finalised.
6. Allocate each child to a route: streamlined with their own Form 14653, or delinquent FBAR only.
7. Add signature-authority accounts to the parent's FBARs.
8. Draft consistent narratives. The parents' and children's certifications must tell the same story about when and how the family learned of the obligations.
9. Submit as one coordinated package, with each taxpayer's papers separately bundled, marked and signed, and the FBARs filed electronically on the same timetable.

Families with substantial holdings in the parents' names will usually have the children's work folded into a broader high-net-worth compliance review, so that the children's position is never left as an afterthought to the parents' larger file.

Bringing the children into compliance with confidence

A child's missed FBAR is rarely a large tax problem, but it is a genuine filing failure, and it sits inside a family submission where every certification must line up. We prepare complete streamlined packs for US-UK families, children included: FBARs signed correctly for minors, the 1040 and Form 8615 or 8814 analysis for each child, PFIC reporting on Junior ISAs, and separate Forms 14653 where they are needed. To discuss your family's position in confidence, contact our cross-border team or explore our US-UK tax accountants service.