Behind on US Taxes After Marrying a UK National? How Streamlined Filing Works
If you are behind on US taxes after marrying a UK national, the IRS Streamlined Filing Compliance Procedures usually let you catch up with zero penalties. You file three years of amended returns and six years of FBARs, certify the lapse was non-wilful, and your UK spouse is not dragged into the US system.
By the TaxYork Cross-Border Tax Team — reviewed by a US-UK dual-qualified adviser (CPA / Enrolled Agent).
Why does marrying a UK national put me behind on US taxes?
Marriage rarely creates the problem; it exposes it. US citizens and green-card holders owe US tax on worldwide income, no matter where they live, so someone who moved to the UK for a partner has often quietly missed several years of returns and foreign-account reports. The wedding, a joint mortgage,e or a new bank account is usually the moment the gap becomes obvious.
The United States taxes based on citizenship, not residence. Once you settle in the UK, HMRC taxes you as a UK resident,nt and the IRS still expects a Form 1040 every year. Most people are stunned to learn the obligation never paused. The good news is that living abroad with a foreign spouse is precisely the profile the Streamlined Filing Compliance Procedures were designed to help.
See the IRS position on Americans overseas at irs.gov: US taxpayers residing outside the United States. If you are only now discovering the whole picture, our guide on accidental Americans in the UK is a useful companion read.
What is the Streamlined Filing Compliance Procedures program?
Streamlined is an IRS amnesty route for taxpayers whose failure to file was non-wilful — an honest mistake rather than deliberate evasion. It brings you current with three years of income tax returns and six years of foreign bank account reports, and for genuine expats, it carries no penalty at all.
There are two tracks. Which one applies turns almost entirely on where you have been living, and most people who moved to the UK to be with a partner land on the penalty-free side.
Streamlined Foreign Offshore Procedures (SFOP)
SFOP is the overseas track,k and its headline is a 0% miscellaneous penalty. You qualify if, in at least one of the last three years, you had no US abode and were physically outside the United States for at least 330 full days. You attach Form 14653 to certify non-residency and non-wilfulness. A US citizen who married a UK national and now lives in Britain will almost always meet this test.
Streamlined Domestic Offshore Procedures (SDOP)
SDOP is for taxpayers who are still U.S. residents and therefore fail the non-residency test — for example, a couple who married abroad but have since moved to the States. It carries a 5% penalty on the highest year-end aggregate value of your unreported foreign financial assets across the six years, certified on Form 14654. The mechanics are otherwise identical.
Full details are on the IRS page for the Streamlined Filing Compliance Procedures.
Feature
SFOP (Foreign)
SDOP (Domestic)
Who it fits
US person living in the UK
A U.S. person living in the US
Miscellaneous penalty
0%
5% of the highest year-end asset value
Non-residency test
No US abode + 330+ days abroad in 1 of last 3 years
Not met
Certification form
Form 14653
Form 14654
Tax returns required
3 years (amended or delinquent)
3 years amended
FBARs required
6 years
6 years
Do I actually qualify for the 0% penalty track?
If you live in the UK and were outside the US for 330 or more days in any one of the last three years without keeping a US home, you qualify for SFOP and its zero penalty. You must also be able to certify honestly that the failure to file was non-wilful. Nearly everyone who relocated to be with a British spouse meets both conditions.
The 330-day count uses full days abroad, so a fortnight visiting family in the States is fine as long as one qualifying year clears the threshold. "No US abode" means you did not maintain a home available for your use in the United States — a room you keep at your parents' house can complicate this, so document your UK residence carefully. Our note on the 330-day physical presence test works through the edge cases.
What does non-wilful actually mean?
Non-wilful conduct is negligence, an honest misunderstanding, or a good-faith mistake about the law. "I had no idea US citizens abroad still had to file" is the textbook non-wilful story, and it describes most cross-border couples. If you knew you had to file but chose not to, Streamlined is not the correct program, and you should seek advice before doing anything.
How does my UK spouse affect my filing?
Your UK spouse is generally outside the US tax system entirely, and Streamlined does not require them to file anything. The main decision is your own filing status, and for most couples, Married Filing Separately is the cleaner choice. A non-resident-alien spouse is only pulled into US tax if you deliberately elect it.
MFJ or MFS with a non-resident-alien spouse?
A UK national with no US ties is a non-resident alien (NRA) for US purposes. You can file Married Filing Jointly only by making a Section 6013(g) election, which treats your spouse as a US resident and subjects their worldwide income — their UK salary, ISA, pension — to US tax forever unless revoked. Most couples decline this and file Married Filing Separately instead, keeping the UK spouse's finances out of the IRS's reach.
Filing MFS with an NRA spouse who has no SSN or ITIN is routine: you write "NRA" in the space for the spouse's identifying number. The Cornell Law reference for the joint election is at 26 U.S. Code § 6013.
Question
MFS with NRA spouse
MFJ (§6013(g) election)
UK spouse's income taxed by the IRS?
No
Yes, worldwide
Spouse needs SSN/ITIN?
No — enter "NRA"
Yes, must obtain an ITIN
Standard deduction
Single-equivalent amount
Higher joint amount
Typical fit for UK-based couples
Usually best
Rarely worth it
Whose accounts go on my FBAR?
Report accounts you own or can control. Your own UK current account, savings, and pension go on your FBAR; your spouse's separate accounts do not, and putting them there needlessly exposes their finances. A jointly held account — a shared current account or offset mortgage savings pot — does go on your report because you have a financial interest in it.
What are FBAR and Form 8938, and do they apply to me?
If your foreign accounts collectively exceeded $10,000 at any point during the year, you must file an FBAR. Form 8938 is a separate, higher-threshold report filed with your tax return. Streamlined fixes both retrospectively.
FBAR (FinCEN Form 114)
The FBAR is filed electronically with FinCEN, not the IRS, when the aggregate of all your foreign accounts exceeds $10,000 at any moment in the calendar year. Streamlined requires six years of FBARs. Penalties for failing to file are steep outside the program — the non-wilful penalty runs to $16,536 per violation and the wilful penalty to $165,353 or 50% of the balance — but Streamlined waives them. The 2023 Supreme Court decision in Bittner v. United States confirmed that the non-willful penalty applies per form, not per account. IRS guidance sits at irs.gov: Report of Foreign Bank and Financial Accounts (FBAR).
Form 8938 (FATCA)
Form 8938 reports "specified foreign financial assets" and only bites at higher thresholds. Living abroad and filing separately, you report once your assets exceed $200,000 on the last day of the year or $300,000 at any point. For those filing jointly, the thresholds rise to $400,000 and $600,000. Details are on irs.gov: About Form 8938. Because ISAs, UK pensions, and investment platforms count, see our breakdown of how ISAs are treated for US tax purposes.
What does the Streamlined process actually involve?
You prepare three years of returns and six years of FBARs, write a clear non-wilfulness narrative, and submit the package as one filing. Done properly, it is a paperwork exercise rather than an audit.
Step by step
- Confirm eligibility — non-wilful conduct and, for SFOP, the 330-day non-residency test.
- Gather six years of financial records — UK bank, building society, pension and investment statements.
- Prepare three years of tax returns, claiming the Foreign Earned Income Exclusion or Foreign Tax Credit so UK tax offsets US liability.
- Prepare six years of FBARs via FinCEN's BSA e-filing system.
- Draft the certification — Form 14653 (SFOP) or Form 14654 (SDOP) — telling your story plainly.
- Submit the returns and certification to the IRS Streamlined Unit and e-file the FBARs.
Because the UK's income tax rates are generally higher than US rates, the Foreign Tax Credit usually wipes out any US tax due, which is why so many Streamlined cases settle at $0 owed. HMRC's own overview of rting is available on gov.uk: tax on foreign income. Our Foreign Tax Credit vs FEIE guide explains which relief to choose.
Case study: Sarah, an American in Leeds
Sarah, a US citizen, married James, a UK national, and moved to Leeds. She had not filed a US return in five years and did not know she had to. Her UK accounts — a current account, a Cash ISA, and a workplace pension — peaked at a combined $45,000 in one year, so FBARs were required, but her assets remained well under the $200,000 Form 8938 threshold.
She used SFOP: three amended returns, six F BARs, Form 1463, explaining that she had genuinely believed that living and paying tax in the UK ended her US obligations. She filed Married Filing Separately, so James's salary and accounts remained outside the US tax system entirely, and the Foreign Tax Credit covered the modest US tax on her UK salary. Outcome: fully compliant, 0% penalty, and roughly $300 of US tax across three years. James never had to file anything.
Ready to get compliant without the panic?
Coming forward through Streamlined is far cheaper and calmer than waiting for a bank's FATCA disclosure to reach the IRS first. TaxYork handles US-UK Streamlined cases end to end — eligibility check, three years of returns, six years of FBARs and a watertight Form 14653 narrative — while keeping your UK spouse out of the US system. Email hello@taxyork.com, call 020 3488 8606, or visit taxyork.com to book a fixed-fee Streamlined review.