A US citizen in the UK who owns a UK limited company and never filed Form 5471 has to include one for each year of the catch-up. The IRS instructions for the Streamlined Foreign Offshore Procedures (opens the official IRS page in a new tab) ask for complete and accurate late returns together with all required information returns, and name Form 5471 among them. The form for each year goes in with that year's return, and any US tax on the company's profits is paid with the package. Done properly, the Foreign route protects the filer from the initial $10,000 penalty for each missed form.
This post is for US citizens and green card holders who run a business through their own UK company and are now putting several years right. It goes further than our guide for people behind on US taxes in the UK on one question: what the company adds to the package. It covers the filing duty, what the accounts must supply, the income the company can create on the owner's return, the penalty position, the time limit for assessment, and a worked example from Edinburgh.
Does a Streamlined submission need Form 5471 for my UK company
Yes, for every year in the covered period in which you had a filing duty. The IRS page for taxpayers residing outside the United States says the late or amended returns must be filed together with all required information returns, giving Forms 3520, 5471 and 8938 as examples. A return without the company's form is not a complete submission.
The covered period is the most recent three years for which the US return due date, or properly extended due date, has passed. Each of those years needs its own Form 1040 and, attached to it, its own Form 5471. The IRS says information returns go in with the return even where they would normally be filed separately, so nothing about the company is sent on its own. The FBARs for the most recent six years are filed electronically with FinCEN, and the company's bank account can belong on them, as our post on the FBAR for your UK company bank account explains.
The filing duty comes from ownership, not income. The Instructions for Form 5471 (opens the official IRS page in a new tab) describe category 4 filers as US persons who control a foreign corporation, generally by owning more than half of its vote or value, and category 5 filers as US shareholders of a controlled foreign corporation. A sole US owner of a UK limited company is usually in both, every year, including years of loss or no activity.
- A late Form 1040 for each covered year, marked for the procedure
- A Form 5471 for each company and each covered year, attached to that return
- Form 8992 and any other forms the company's income requires for that year
- Copies of the signed Form 14653 attached to each return and information return
- Payment of all tax and statutory interest shown on the returns
What do the company's accounts need to supply for back years
Full figures for each year, not the version on the public register. The form restates the company's income statement and balance sheet for a US reader, measures earnings and profits under US tax rules, and lists dealings between the company and its owner. All of that has to be rebuilt from the company's own records for every covered year.
The UK annual accounts and Company Tax Return (opens the official GOV.UK page in a new tab) are the starting point. A small company often files abridged or micro-entity accounts at Companies House that leave out the profit and loss account, so the preparer needs the full accounts, the trial balance and the corporation tax computation behind them. Where the company's year end is not 31 December, figures may need to be split or matched to the periods the form covers.
The owner's side matters as much as the company's. Salary, dividends, the director's loan account and expenses paid for the owner appear on Schedule M and must agree with what the owner reports personally. Our financial statements work turns UK ledgers into US-basis schedules, and our post on Form 5471 for a one-person UK limited company walks through each schedule.
- Full statutory accounts and trial balance for each year in the period
- Corporation tax computations and evidence of UK tax paid
- Payroll summaries, dividend vouchers and the director's loan account
- The share register and any change in ownership during the years
- Bank statements for the company's accounts, for the FBAR as well
Can the company's profits create US tax for the catch-up years
They can, and this is where the company changes the outcome. A US shareholder of a controlled foreign corporation may have to include some of the company's income on their own return each year, whether or not it was paid out. Each catch-up year is prepared under the law in force for that year, so the rules for years before 2026 apply.
For tax years beginning before 1 January 2026, the main regimes are Subpart F, reported through Schedule I of the form, and global intangible low-taxed income, known as GILTI, calculated on Form 8992 (opens the official IRS page in a new tab). For a UK trading company whose owner leaves profit in the company, the GILTI computation is usually the one that matters. By default an individual is taxed on that inclusion without a credit for the corporation tax the company paid.
The regime was amended by 2025 legislation and renamed net CFC tested income for tax years beginning after 31 December 2025, as described in the Internal Revenue Bulletin (opens the official IRS page in a new tab). Back years stay on the old rules. Options to review for each year include a section 962 election and the high-tax exception, and our post on GILTI becoming net CFC tested income explains how they work. Any tax that results is paid with interest as part of the package.
Does Streamlined relieve the Form 5471 penalty
On the Foreign route, yes, for an eligible filer who follows the instructions. The penalty for a missing form is $10,000 for each company for each year, with further amounts if the form is still missing after IRS notice. The IRS says an eligible taxpayer using the Foreign route will not be subject to information return penalties for the streamlined years.
The same page sets out the limits. The protection does not apply if an examination finds the original non-compliance was fraudulent or an FBAR violation was wilful. If the IRS later finds additional tax on a streamlined return, it may assert penalties on that deficiency. And penalties already assessed for those years before the submission will not be abated. The streamlined filing compliance procedures (opens the official IRS page in a new tab) page also excludes anyone already under IRS civil examination or criminal investigation.
The Domestic route works differently. It is for people who do not meet the non-residency test, and it carries a miscellaneous offshore penalty of 5% on the relevant foreign assets. For someone who reported all their income and missed only the company form, the delinquent international information return procedures (opens the official IRS page in a new tab) may fit better, but the IRS says penalties may still be assessed there. Our IRS streamlined filing service helps decide which route fits.
- Foreign route: no information return penalties for eligible, compliant filers
- Protection lost on a finding of fraud or a wilful FBAR violation
- Penalties already assessed before the submission are not abated
- Additional tax found later can carry its own penalties
Why does a missing Form 5471 keep the tax year open
Because of section 6501(c)(8) of the Internal Revenue Code. Where information required under section 6038, the provision behind Form 5471, is not furnished, the time for the IRS to assess tax on the return to which it relates does not end until three years after the information is furnished. A missing form leaves that year open.
The extension is not limited to the company. As written, it covers any tax return, event or period to which the information relates. Where the failure was due to reasonable cause and not wilful neglect, the statute limits the extended period to the items related to the failure. Whether reasonable cause exists depends on the facts, and it is not presumed.
This interacts with the catch-up in a way that is easy to miss. The streamlined procedure asks for a fixed number of years. A year outside that window in which a Form 5471 was required and never filed is not closed by the passage of time, because the information has not been furnished. Whether to file further years is a judgement made on the facts, and it is worth raising before the package is posted.
How might this look for a company owner in Edinburgh
A US citizen in Edinburgh has run a software consultancy through her own UK limited company for some years. She is the sole shareholder and director, pays herself a salary and occasional dividends, and has never filed a US return or a Form 5471. A FATCA letter from her bank prompts her to act.
She qualifies for the Foreign route on residence and her failure was not wilful. Her package has three late Form 1040s, each with a Form 5471 built from the company's full accounts and ledgers, and the GILTI computation for each year, all of them before 2026. Her salary was taxed in the UK and is covered by foreign tax credits. The profit she left in the company produces an inclusion for each year, so the options to review are tested before anything is signed.
Her certification explains how she came to miss the filings, as our post on writing the Form 14653 certification describes. The company's US position from 2026 onwards, including whether a check-the-box election suits it, is a separate decision covered in our guide to US-UK tax for founders. The wider sequence is in our guide to IRS streamlined filing from the UK, and you can contact US UK Tax Returns to review your own company's years.
General information, not advice. The right answer depends on your circumstances and the tax year concerned.
