Yes, it still matters. A US citizen or green card holder who has not filed US returns while living in the UK has missed a filing duty, and that duty does not depend on a bill being due. Owing nothing means the late-filing and late-payment penalties, which are worked out on unpaid tax, usually have nothing to bite on. It does not mean the years are closed, and several other consequences have no connection to the tax figure.
This post is for people who think they have never filed US taxes living in the UK and suspect, often correctly, that UK tax would have wiped out any US liability. It goes further than our guide for people behind on US taxes in the UK on one question: whether a nil balance makes the problem go away. It covers the IRS time limit, the penalties that ignore tax, what staying silent costs, the catch-up routes, and a worked example from Leeds.
Does the filing duty apply if you owe no US tax?
Yes. The duty to file turns on gross income, measured before any credit or exclusion, and not on the tax left at the end. The IRS says that US citizens and resident aliens abroad (opens the official IRS page in a new tab) are subject to the same filing rules as people living in the United States, so a UK address changes where you send the return and not whether you send it.
The reliefs that bring a UK employee's US bill down to nothing are claimed on the return. The foreign tax credit (opens the official IRS page in a new tab) is claimed on Form 1116, and the foreign earned income exclusion (opens the official IRS page in a new tab) on Form 2555. Neither applies by itself. A person who never filed has never made either claim, so a nil result is something the return shows once it is prepared and not something that can be assumed in advance. For a married filing separately return the gross income threshold is only $5, which catches many people married to a non-US spouse.
Owing nothing is common for a UK salary, because UK income tax is generally higher than US tax on the same income. It is less certain where there is rental income, investment gains, a UK company or a pension lump sum. The return is where that is worked out, and it can only be worked out by filing.
What can the IRS do about years you never filed?
The IRS can assess tax for an unfiled year at any time, because the ordinary time limit for assessment starts only when a return is filed. A year left blank therefore stays open indefinitely. A late return starts the clock from the date it is filed, which is one practical reason to file even where nothing is owed.
The IRS may also prepare a substitute return for a person who does not file. Its own guidance on past due returns says a substitute return might not give credit for deductions and exemptions the person is entitled to. Because a substitute return is built from the information the IRS holds, it can omit the foreign tax credit that would have brought the bill to nil.
In practice the IRS often does nothing for years, and there is no useful way to predict when that stops. Information flows from UK banks under FATCA, and a letter from a bank asking about US status is frequently the first notice. Our post on Streamlined after an IRS letter explains why the catch-up routes narrow once the IRS makes contact, so the position tends to get worse with time and not better.
Which penalties apply even when no tax is due?
Information return penalties and FBAR penalties apply whether or not any tax is due. They are fixed or proportional to something other than the tax, so a nil balance gives no protection against them. This is the main reason a no-tax case is not automatically a harmless one.
The details depend on what you own. Form 8938 carries an initial penalty of $10,000 for a missed year, and Form 5471 for a UK company you own or direct carries an initial penalty of $10,000 per form per year. Form 8621 has no standalone monetary penalty, but failing to file it keeps the statute of limitations open for the whole return. Whether any of these forms applies to you turns on the facts.
The FBAR is filed with FinCEN and not with the tax return. The threshold is an aggregate across all your foreign accounts, and signature authority counts as well as ownership. For non-wilful failures the Supreme Court held in Bittner v. United States in 2023 that the penalty applies per report and not per account. We do not quote FBAR penalty amounts, and the position for wilful failures is of a different order.
- FBAR: filed with FinCEN (opens the official FinCEN page in a new tab), required once aggregate foreign accounts pass the threshold
- Form 8938: reports specified foreign financial assets above the abroad thresholds, such as $200,000 at year end or $300,000 at any time for a single filer
- Form 8621: needed for PFICs such as many UK funds and ISA holdings, subject to a de minimis exception
- Form 5471: needed for certain owners and officers of a foreign corporation
What does staying quiet cost besides penalties?
The costs are mostly lost options. A refund or credit that depends on filing can lapse once the time allowed for claiming it has passed, and a person who owes nothing but would have been owed something loses that money for the older years. The IRS says there is no failure-to-file penalty for a late filer who is due a refund, which is a separate point from whether the refund can still be claimed.
Elections also suffer. The 330 full days test and the foreign earned income exclusion are only useful when claimed on a return, and the choice between the credit and the exclusion shapes later years. In the UK the foreign tax credit often gives the better result and preserves carryovers of back one year and forward ten, but those carryovers exist only if returns have been filed to record them.
Renunciation is the other pinch point. Form 8854, filed for the year of expatriation, asks the person to certify compliance with all US federal tax obligations for the five preceding tax years. A person who cannot certify is a covered expatriate whatever their wealth. Our expatriation service and the IRS page on expatriation tax (opens the official IRS page in a new tab) set out the tests.
- Unclaimed refunds and credits for older years that can no longer be recovered
- Foreign tax credit carryovers that were never recorded on a return
- A clean five-year record needed to certify on Form 8854
- No answer ready when a bank, an adviser or the IRS asks about US status
How do you catch up when you owe nothing?
For most UK residents the usual route is the Streamlined Foreign Offshore Procedures (opens the official IRS page in a new tab). They ask for three years of returns, six years of FBARs, payment of any tax and interest, and a signed Form 14653 certifying that the failures were non-wilful. A person who qualifies pays no miscellaneous offshore penalty on the Foreign route. A nil tax result simply means nothing is paid with the package.
The Streamlined Domestic Offshore Procedures (opens the official IRS page in a new tab) are for people who do not meet the non-residency test. They charge a 5% miscellaneous offshore penalty, so the route matters. Both require non-wilful conduct, certified in writing under penalty of perjury, and neither is available once the IRS has opened an examination. The test for wilful conduct is explained in our post on Streamlined versus voluntary disclosure.
Where income was reported but only forms were missed, narrower routes can fit, such as the delinquent international information return submission procedures (opens the official IRS page in a new tab). Sending in late returns with no procedure at all, the quiet disclosure approach, can invite the penalties a procedure avoids. Which route fits depends on what was missed and why, and our IRS streamlined filing service starts by establishing that.
How might this look for a US citizen in Leeds?
A US citizen employed in Leeds moved to the UK as a child, paid income tax through PAYE and has never filed a US return. She has a current account, a savings account and a workplace pension, and learns of the duty when her bank asks about her US status. She assumes that because she paid UK tax she owes nothing.
She is probably right about the tax, but not about the effect. The returns still need to be prepared to show that a foreign tax credit or exclusion applies, her accounts may need FBARs, and whether any other form applies is a question of facts. She meets the non-residency test, so the Foreign route is the likely fit, subject to the non-wilful certification.
Her package therefore shows nil tax and carries no penalty if she qualifies. Her later returns can then be filed on time, and the individual tax returns service covers that. The foreign income and FBAR service deals with the account reports, and the Form 1040 page describes the return. Our guide to catching up on US taxes in the UK shows the whole sequence, and you can contact US UK Tax Returns to discuss your own facts.
General information, not advice. The right answer depends on your circumstances and the tax year concerned.
