Does a small UK share subscription under $100,000 still need Form 926?

It can. The $100,000 cash threshold is only one of two tests. If the US transferor holds at least 10% of the voting power or value of the UK company immediately after the transfer, the transfer is reportable on Form 926 regardless of the cash amount involved, which catches most founders and majority shareholders even on a modest subscription.

Is a director's loan converted to equity a transfer for Form 926 purposes?

Yes. Capitalising a director's loan exchanges property the shareholder already holds — the right to repayment — for shares in the foreign corporation. It is a transfer of property to a foreign corporation under section 6038B(a)(1)(A) even though no fresh cash changes hands at the date of the conversion, and it is one of the transfers most often overlooked.

My accountant filed my US returns but never mentioned Form 926. What now?

Establish first whether a reportable transfer actually occurred — review Companies House filings for share allotments and loan capitalisations against your ownership percentage. If a transfer was missed, the delinquent Form 926 is generally filed with a reasonable-cause statement, either on its own or inside a broader catch-up depending on what else is outstanding.

Does Form 926 apply only to US citizens, or to UK-resident Americans too?

It applies to US citizens or residents regardless of where they live. A US citizen resident in the UK, or a green card holder based in London, who transfers property to a UK company is tested the same way as someone living in the United States; residence in the UK does not remove the filing requirement.

Can Companies House filings help prove a late Form 926 transfer date and value?

Yes. The SH01 return of allotment filed after a share issue, and the company's confirmation statement history, are searchable free through Companies House at find-and-update.company-information.service.gov.uk and independently record the date, share class and amount for each allotment — exactly the details Form 926 asks for, which makes them central to reconstructing a late filing.

Does filing Form 5471 mean the UK company funding transfer is already reported?

No. Form 5471 reports the foreign corporation's ongoing annual activity and the filer's continuing ownership; Form 926 reports the one-time transfer that funded or capitalised the company. Being current on Form 5471 for years does not substitute for a missed Form 926 covering the share subscription, working capital injection or loan conversion that funded it.

Missed US Tax Returns: Form 926 for UK Funding

Missed US tax returns are usually diagnosed by hunting for unreported income. The diagnosis that self-prepared returns, and a surprising number of professionally prepared ones, get wrong is different: a reportable transfer of property to a foreign corporation that should have carried Form 926, Return by a U.S. Transferor of Property to a Foreign Corporation, and never did. If you are a US citizen or resident who capitalised a UK limited company — a share subscription, a cash injection for working capital, a director's loan later converted into equity, or a contribution of intellectual property or other assets — that funding event is precisely the kind of transfer section 6038B of the Internal Revenue Code was written to catch.

In the returns we prepare for founders, investors and executives who hold a UK company in their structure, Form 926 is the single most common gap we find sitting behind an otherwise complete-looking US filing history. It rarely announces itself, because the rest of the return usually looks fine: dividends are reported, capital gains are reported, and even Form 5471 for the company's ongoing annual activity is often already on file. What is missing is the one-time report of the transfer that funded the company in the first place. Because that transfer usually happened years before anyone thought seriously about US compliance, nobody connects a UK share allotment or a loan-to-equity conversion to an American tax form.

This article works through what section 6038B and Form 926 actually require, who has to file, what counts as a reportable transfer including cash, how the penalty and reasonable-cause rules work, why the statute of limitations under section 6501(c)(8) keeps this exposure open far longer than most people expect, how Form 926 sits alongside Form 5471 for the same company, and — the part generic guidance skips — how to reconstruct the evidence for a transfer that happened years ago and bring a missed Form 926 current.

What Is Form 926, and Why Does Funding a UK Company Trigger It?

Form 926 is the information return a US transferor files to report an exchange or transfer of property to a foreign corporation described in section 6038B(a)(1)(A) of the Internal Revenue Code. The IRS sets out the requirement on its Form 926 filing page at https://www.irs.gov/individuals/international-taxpayers/form-926-filing-requirement-for-us-transferors-of-property-to-a-foreign-corporation: US citizens or residents, domestic corporations, and — where a partnership is the transferor — its domestic partners individually, must file Form 926 for a covered transfer. The form is attached to the transferor's income tax return for the tax year that includes the date of the transfer; it is not a standalone filing sent separately to the IRS. The current revision and general filing details are at https://www.irs.gov/forms-pubs/about-form-926.

For a US person who capitalises a UK limited company, the trigger is rarely dramatic. It is the ordinary mechanics of starting and running a business: subscribing for shares in exchange for cash, injecting working capital as the company grows, contributing intellectual property developed personally into the corporate vehicle, or converting an informal loan to the company into share capital. Each of those is a transfer of property — cash counts as property for this purpose — to a foreign corporation, and each one has to be tested separately against the filing requirement.

Who Must File, and the Partnership Trap

The filer categories that matter to most readers of this article are straightforward on paper:

US citizens and residents who personally transfer property to a foreign corporation
Domestic corporations that make the transfer directly
Domestic partners of a partnership transferor — the partnership itself does not file Form 926; each partner reports its own share of the transfer
A person who was a US citizen or resident at the date of the transfer, even if their US tax position has changed since

That partnership rule catches a structure we see often: a UK company capitalised through a US LLC or partnership vehicle owned by American individuals. The Form 926 obligation sits with the individual partners, not the entity, which means a preparer working only from the partnership's books — rather than tracing through to each partner's personal return — can miss it completely, even when the partnership's own filings are otherwise in good order.

What Counts as a Reportable Transfer of Property, Including Cash

Section 6038B(a)(1)(A) covers exchanges or transfers of tangible or intangible property to a foreign corporation, and the IRS's guidance is explicit that cash is property for this purpose. In a UK company context, the transfers that most often go unreported look like this:

A share subscription — cash paid in exchange for newly allotted ordinary or preference shares
A working capital injection paid into the company's UK bank account without a formal share issue at the time
A contribution of intellectual property, software, or other business assets on incorporation or during a restructuring
A director's loan account that is later capitalised, converting an amount the company owed the shareholder into share capital
Assets transferred on winding up a UK sole-trader or partnership operation into a newly formed UK limited company

The gap angle most competitors miss is the fourth item on that list. A director's loan converted to equity does not feel like writing a check to a foreign company — it feels like paperwork, a board resolution and a Companies House filing tidying up an existing balance. Economically, though, it is the same event as a fresh cash subscription: property the shareholder previously held (the right to repayment of the loan) is exchanged for stock in the foreign corporation. The same is true of a follow-on share subscription completed to fund a second or third round of UK growth, made by an owner who already filed a Form 926 for the original incorporation and assumed, wrongly, that the obligation was a one-time event rather than one triggered by every subsequent transfer.

The Cash Transfer Rule Most Founders Miss

Because cash transfers are so routine, the IRS applies a specific reporting rule to them rather than treating every cash movement as reportable. A US person who transfers cash to a foreign corporation must report it on Form 926 if either of two conditions is met: immediately after the transfer the person holds, directly or indirectly, at least 10% of the total voting power or total value of the foreign corporation, or the cash transferred to that foreign corporation during the 12-month period ending on the date of the transfer exceeds $100,000. Both tests are confirmed on the IRS's Form 926 filing requirement page cited above.

For a founder who owns most or all of a UK trading company, the 10% ownership test is almost always met, which means every cash transfer is potentially reportable regardless of size. For a minority investor, the $100,000 rolling 12-month threshold matters more, and it is the one people miss: several working capital top-ups paid in over the course of a year, none of which looked significant on its own, can cross $100,000 in aggregate and trigger a filing obligation that nobody tracked because no single payment felt large enough to flag.

What Information Does Form 926 Ask For?

The form and its instructions, available at https://www.irs.gov/pub/irs-pdf/i926.pdf, ask the transferor to identify itself and the transferee foreign corporation, then to describe the transfer in enough detail for the IRS to value it. In practice, the information gathered for a UK company funding event generally covers:

Identifying details for the transferor and the UK transferee corporation, including its jurisdiction and any US EIN it holds
A description of the property transferred — cash, shares subscribed, IP, or other assets
The fair market value and, where applicable, the adjusted basis of the property at the date of transfer
The date of the transfer and the type of exchange or nonrecognition provision it was made under
Additional information required by the regulations under section 1.6038B-1, which can extend to valuation methodology and details of the exchange

For a straightforward cash-for-shares subscription this is usually a short, factual exercise. It becomes more involved where the property transferred is intellectual property or another asset that needs a defensible valuation, or where a loan-to-equity conversion means the amount of the loan capitalised has to be reconciled against company accounts and board minutes to support the figure reported.

The Section 6038B Penalty for a Missed Form 926

The penalty for failing to file a required Form 926 is 10% of the fair market value of the property at the time of the exchange or transfer, capped at $100,000 unless the failure to comply was due to intentional disregard, in which case the cap does not apply. That figure is stated on the IRS's Form 926 filing requirement page. On a modest share subscription the exposure is limited by the value of what was transferred; on a larger funding round, or where several transfers over several years have all gone unreported, the cap on each individual failure still leaves meaningful cumulative exposure across multiple missed forms.

The same IRS page notes that a separate 40% penalty can also apply where an understatement of tax is attributable to an undisclosed foreign financial asset — a distinct accuracy-related exposure that sits alongside, rather than instead of, the section 6038B penalty. The two are assessed on different bases and for different reasons, and a missed Form 926 can in principle touch both if the underlying return also understates tax.

The Reasonable Cause Defence

Section 6038B's penalty does not apply where the failure to comply was due to reasonable cause and not to willful neglect, and that exception is stated directly on the IRS's Form 926 page. What counts as reasonable cause is a facts-and-circumstances question, and it is worth being realistic about how it is actually applied in practice.

The IRS's general page on delinquent international information return submission procedures, at https://www.irs.gov/individuals/international-taxpayers/delinquent-international-information-return-submission-procedures, is a useful guide to how reasonable-cause statements attached to a late filing are treated even though its named examples centre on Forms 3520 and 3520-A rather than Form 926 specifically. That page is explicit that a reasonable-cause statement is not necessarily evaluated at the point the delinquent return is processed, that penalties may still be assessed under existing procedures despite the statement, and that the taxpayer may have to defend the statement later in response to an IRS notice rather than rely on it being accepted automatically. Treat a reasonable-cause narrative for a missed Form 926 the same way: as a position you may have to support with contemporaneous evidence, not as a formality that waives the penalty on its own.

Why Missed US Tax Returns With a Form 926 Gap Rarely Go Statute-Barred

Most US taxpayers assume that once three years pass after filing, the IRS's window to assess additional tax on that return has closed. Section 6501(c)(8) overrides that assumption for returns that should have included section 6038B information. Under that provision, the assessment period extends to the date that is three years after the date on which the information required to be reported — in this case, the Form 926 for the transfer — is actually provided to the IRS. Practically, that means a transfer that happened a decade ago, and was never reported, can leave the return for that year open to assessment today, because the three-year clock under section 6501(c)(8) has arguably never started running.

This is why a missed Form 926 is not a self-limiting problem. Missed US tax returns that omit a section 6038B transfer do not age out of IRS reach the way a normal filing eventually does; they sit open until the required information is filed, whether that happens voluntarily or on IRS contact. Filing the outstanding Form 926 is what starts the three-year clock — which is also the practical argument for filing it sooner rather than leaving the exposure open indefinitely.

Form 926 and Form 5471 for the Same UK Company

Founders who have Form 5471 on file for their UK company sometimes assume the funding transfer is already covered. It is not. The IRS's own summary of Form 5471 describes it as a return filed by "certain U.S. citizens and residents who are officers, directors, or shareholders in certain foreign corporations" — see https://www.irs.gov/forms-pubs/about-form-5471 — and it reports the foreign corporation's ongoing financial activity and the filer's continuing ownership position year after year. Form 926 is a different, one-time report of the transfer event itself: the share subscription, the working capital injection, or the loan capitalised into equity. A shareholder can be fully current on Form 5471 for a UK company's annual results and still have never reported the transfer that originally, or subsequently, capitalised it.

In practice the two forms need to agree with each other. The ownership percentage and share count reported on Form 5471's ownership schedules should reconcile to the shares actually allotted in exchange for the property reported on Form 926, and the dates should line up with the company's own Companies House filing history. We regularly find that a UK company's Form 5471 has been filed accurately for years while the Form 926 for the original incorporation, or for a later funding round, was simply never prepared — two obligations for the same company, only one of which was on anyone's checklist.

Reconstructing the Evidence Years Later: the Late Form 926 Evidence Pack

The hardest part of a late Form 926 is rarely the form itself; it is establishing, years after the fact, exactly what was transferred, when, and at what value. For a UK company, the evidence pack we build for a late filing draws on:

Companies House filing history for the company, including the SH01 return of allotment of shares filed after each round and the annual confirmation statement, all searchable free at https://find-and-update.company-information.service.gov.uk/
UK bank statements showing the cash actually received into the company's account and the date it cleared
Board minutes and shareholder resolutions authorising the share issue or the capitalisation of a director's loan
The company's statutory accounts and director's loan account ledger, to reconcile the amount capitalised against what the company's books show was owed
Any contemporaneous valuation, share purchase agreement, or subscription agreement setting out price per share and total consideration

An SH01 filed with Companies House shortly after an allotment is often the single most useful document in this pack: it independently dates the transaction and states the number, class and amount paid for the shares allotted, matters Form 926 asks about directly. Cross-referenced against the bank record and the board minute that authorised it, it lets a late Form 926 be completed with a defensible date and value, rather than an estimate.

Remediating a Missed Form 926 Inside a Catch-Up or Streamlined Submission

How a missed Form 926 gets fixed depends on the state of the rest of the taxpayer's filing history. Where the underlying US returns were filed but omitted the form, the established route is to file the delinquent Form 926 with a reasonable-cause statement, generally through amended return procedures for the year of the transfer, following the same framework discussed above for delinquent international information returns.

Where the missed Form 926 is one piece of a broader gap — unfiled US returns, unreported UK income, or FBARs never filed for UK accounts — it more often sits inside a wider catch-up. For US persons who meet the non-residency and non-willfulness tests, the Streamlined Foreign Offshore Procedures at https://www.irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures require the delinquent or amended returns, a signed non-willfulness certification, and "all required information returns, including FBARs" — a category Form 926 falls within for a covered transfer in a covered year. Bringing the missed Form 926 current inside that submission keeps the whole UK funding history consistent with the certification being made.

Delinquent Form 926 filed alone with a reasonable-cause statement, for an otherwise compliant filer with one isolated gap
Form 926 brought current inside a Streamlined Foreign Offshore submission, for a non-willful filer with a broader compliance gap
Form 926 addressed as part of a full catch-up filing where several years of US returns were never filed at all

Whichever route applies, the calculator at https://www.us-uktax.com/calculators/streamlined-filing-calculator is a useful starting point for scoping the size of a Streamlined submission before deciding how a missed Form 926 fits into it, and our https://www.us-uktax.com/cross-border-tax-planning and https://www.us-uktax.com/business-corporate-tax-planning services cover both the personal and company-side preparation this kind of catch-up requires.

A Worked Scenario: Funding a UK Company Across Three Transfers

The following is an illustration only, with figures chosen for clarity and an assumed exchange rate of $1.27 to £1 used purely to convert the sterling amounts referenced; it is not a real client file.

Year 1: a US citizen resident in London subscribes for £150,000 of new ordinary shares in a newly incorporated UK trading company, funding it entirely in cash — a reportable transfer under both the 10% ownership test and the $100,000 cash threshold
Year 3: the same shareholder has advanced a further £80,000 to the company as an informal director's loan over the preceding 18 months; the company's accountant recommends capitalising it, and the loan is converted into a further allotment of ordinary shares — a second reportable transfer, this time of property other than cash (the right to repayment)
Year 4: a working capital shortfall is met with a £90,000 cash injection from the same shareholder within a single 12-month period — a third reportable transfer under the cash threshold alone

Three transfers, three separate Form 926 obligations, and in this illustration none were filed, because the shareholder's US returns for those years were self-prepared using off-the-shelf software that had no prompt for a foreign corporation transfer. By the time the gap is identified, the section 6501(c)(8) exposure described above means all three years are still open to IRS assessment, even though the first transfer happened years earlier. The evidence pack described above — the SH01 for each allotment, the bank records, and the board minutes authorising the loan capitalisation — is what lets each of the three Form 926 filings be completed accurately now, rather than estimated.