Introduction Every year, thousands of Americans living in the UK discover that they should have been filing US federal returns since the day they arrived. Many have never filed. Others filed for a few years and then stopped. Some filed incorrectly — choosing the wrong method for reducing their US tax liability on UK employment […]
Every year, thousands of Americans living in the UK discover that they should have been filing US federal returns since the day they arrived. Many have never filed. Others filed for a few years and then stopped. Some filed incorrectly — choosing the wrong method for reducing their US tax liability on UK employment income, or omitting the FBAR entirely.
A tax specialist for the US and UK who understands the full catch-up landscape — the Streamlined Foreign Offshore Procedures, the FEIE vs FTC decision, the self-employed SE tax interaction with the UK-US Totalization Agreement, and the PFIC treatment of UK investment portfolios — can resolve years of non-compliance in a defined, manageable process. This guide provides a complete catch-up overview for Americans abroad in 2026. Visit our advisory service:
https://www.jungletax.co.uk/services/us-uk-tax/
Tax specialist for US and UK in the late filing context means an adviser who understands the full range of catch-up routes — the Streamlined Foreign Offshore Procedures for non-wilful non-filers, the delinquent FBAR submission procedures for taxpayers who filed returns but missed FBARs, and the delinquent international information return procedures for taxpayers who filed returns but omitted specific forms. They also understand how to prepare catch-up returns that are optimized — with the correct FEIE or FTC election, correct PFIC treatment, and correct SE tax analysis for self-employed taxpayers.
The IRS guidance on options for US citizens abroad who have not filed is at:
https://www.irs.gov/individuals/international-taxpayers/us-citizens-and-resident-aliens-abroad
Different catch-up routes apply to different profiles. A taxpayer with unfiled returns and FBARs — non-wilful — uses the Streamlined Foreign Offshore Procedures. A taxpayer who filed all returns correctly but missed the FBAR uses the delinquent FBAR submission procedures. A taxpayer who filed returns but omitted Form 8938 or Form 5471 uses the delinquent international information return procedures. The tax specialist for the US and UK assesses the taxpayer’s profile at the initial engagement — before recommending any specific route.
Every year, UK banks provide HMRC with account information for US citizens in accordance with FATCA. HMRC passes that data to the IRS. Every year of non-compliance adds another year of FATCA account data without a matching US return. Acting before the IRS initiates contact is always better than waiting. Voluntary compliance through the Streamlined program resolves non-compliance before the IRS acts — and waives the FBAR penalties the IRS could otherwise assess.
Two methods exist for reducing US tax on UK employment income. The Foreign Earned Income Exclusion excludes up to $126,500 of foreign earned income in 2026 — but prevents the use of FTC on the excluded income. The Foreign Tax Credit offsets UK income tax paid against the US federal liability — typically eliminating the US federal liability for UK taxpayers in the 40 percent UK band. The wrong choice in catch-up returns may persist — because switching methods requires IRS permission after the initial election.
Our guide to FEIE vs FTC for US expats is at:
https://www.jungletax.co.uk/jungle-tax-news-updates/us-expat-tax-services-feie-vs-ftc/
A self-employed US citizen in the UK pays UK National Insurance Contributions. They are also technically subject to US self-employment tax — at a combined rate of 15.3 percent on the first $168,600 of net SE income in 2026. The UK-US Totalization Agreement prevents double social security taxation — a self-employed US citizen who pays UK NIC is exempt from US SE tax on the same income. The tax specialist for the US and UK applies the Totalization Agreement correctly on every catch-up return — avoiding unnecessary SE tax payments that non-specialist advisers often include incorrectly.
The Streamlined Foreign Offshore Procedures is the primary catch-up route for US citizens living outside the United States who have not filed US federal returns or FBARs non-wilfully. Three years of US federal income tax returns and six years of FBAR filings are prerequisites for the program. All FBAR penalties are waived for a complete, accurate, and genuinely non-wilful submission. The three catch-up returns are typically the three most recently due returns.
Where a US citizen filed all their federal returns correctly but missed the FBAR, the delinquent FBAR submission procedures allow the missing FBARs to be filed without penalty — provided the federal returns were accurate, and there is a reasonable cause explanation for the FBAR omission. This route applies only where the federal returns were complete and accurate. Where the returns also had errors or omissions, the Streamlined program is the correct route.
Where a US citizen filed federal returns but omitted specific international information returns — Form 8938, Form 5471, Form 8621 — the delinquent international information return procedures allow those forms to be filed without penalty where there is reasonable cause. The tax specialist for the US and UK assesses whether the federal returns were otherwise complete before recommending this route.
Catherine is a US citizen who moved from Chicago to Bristol in 2017. She works as a self-employed graphic designer — sole trader. She has not filed US federal returns or FBARs since her arrival. She pays UK Class 2 and Class 4 National Insurance Contributions on her net self-employment income of approximately £52,000 per year. She holds a UK current account, a Stocks and Shares ISA (two UCITS funds, current value £28,000), and a UK savings account.
Jungle Tax assessed Catherine’s position. Non-wilful — she had not known about the US filing obligation for Americans abroad. The Streamlined Foreign Offshore Procedures was the correct route. The three catch-up returns covered 2022, 2023, and 2024. The six FBARs covered 2019 through 2024.
For each of the three return years, the tax specialist for the US and the UK modeled FEIE vs. FTC. The FTC from UK income tax (at the 20 percent basic rate on the UK net profit) produced nil additional US tax in all three years, making the FTC method more efficient than the FEIE.
The Totalization Agreement exemption was applied — Catherine obtained a Certificate of Coverage from HMRC confirming payment of UK NIC. US SE tax on £52,000 of net self-employment income at 15.3 percent would have been approximately $10,000 per year. The Totalization exemption eliminated this entirely — a saving of approximately $30,000 across the three catch-up years.
Additional US tax owed across all three catch-up years: nil. FBAR penalty waiver: theoretical post-Bittner exposure of $60,000 eliminated. SE tax savings from the Totalization Agreement: approximately $30,000 across three years. Form 8621 filed for both ISA UCITS funds. Annual compliance program established. Adviser fee: £2,200.
The FEIE is widely marketed as the default method for US expats — but for UK taxpayers in the 40 percent tax band, the FTC typically yields a lower combined tax. The tax specialist for US and UK models both use methods for each year before making the election, not defaulting to the FEIE because it is more familiar.
A self-employed US citizen who pays UK NIC is exempt from US SE tax under the Totalization Agreement. Many non-specialist advisers are not aware of this and include US SE tax on catch-up returns, resulting in unnecessary payments of thousands of pounds. The exemption requires a Certificate of Coverage from HMRC — obtained before the returns are prepared.
The FBAR requires peak balances from monthly statements — not year-end balances. A catch-up FBAR set using year-end figures is inaccurate — and inconsistent with the FATCA data the IRS holds for the same accounts. The adviser requests monthly statements for all accounts for the full six-year FBAR period before beginning FBAR preparation.
Every non-US fund — UCITS fund, UK ETF, UK investment trust — is a PFIC. The catch-up returns must include Form 8621 for every PFIC in every catch-up year. Omitting Form 8621 leaves the return open indefinitely. The adviser reviews the investment portfolio before beginning return preparation — identifying every PFIC position across all three catch-up years.
The IRS guidance on Streamlined procedures for Americans abroad is at:
https://www.irs.gov/individuals/international-taxpayers/streamlined-foreign-offshore-procedures
Jungle Tax is a specialist US-UK cross-border tax advisory firm with specialists in the US and UK, including IRS Enrolled Agents and UK-qualified tax practitioners experienced in late-filing catch-up for Americans abroad. We confirm the correct catch-up route based on each taxpayer’s profile and model FEIE vs. FTC for every catch-up year, apply the UK-US Totalization Agreement for every self-employed taxpayer, review the investment portfolio for PFIC positions, and file Form 8621 for every qualifying fund in every catch-up year. We request monthly statements for the full six-year FBAR period and establish the annual compliance program before the submission closes.
Read our step-by-step catch-up process guide:
https://www.jungletax.co.uk/jungle-tax-news-updates/us-uk-tax-accountants-catching-up-late-filings/
Catching up on late US filings requires a tax specialist in the US and the UK who understands the correct catch-up approach, optimizes the FEIE vs. FTC election for each year, applies the Totalization Agreement for self-employed taxpayers, and identifies every PFIC position before the returns are prepared.
Three points matter most. First, the FTC typically produces a lower combined tax than the FEIE for UK taxpayers in the 40 percent band — model both methods before making the election. Second, self-employed US citizens who pay UK NIC are exempt from US SE tax under the Totalization Agreement — this saves thousands of pounds in unnecessary payments on catch-up returns. Third, every non-US fund is a PFIC — Form 8621 must be filed for every position in every catch-up year, or the statute of limitations remains open indefinitely.
Jungle Tax | mailto:hello@jungletax.co.uk | 0333-8807974 | https://www.jungletax.co.uk
The Streamlined Foreign Offshore Procedures require three years of federal returns and six years of FBARs — regardless of how many years you have been non-compliant.
For most UK taxpayers at the 40% UK rate, FTC produces lower combined tax — the UK tax fully offsets the US liability. FEIE has a stacking effect above the exclusion ceiling—model both before choosing.
Not if you pay UK National Insurance Contributions. The UK-US Totalization Agreement exempts UK NIC payers from US SE tax. A Certificate of Coverage from HMRC is required to claim the exemption.
Yes. ISA income is US-taxable with no FTC available. SIPP growth is deferred via the Article 17 election — made annually on Form 8833. Both appear on the FBAR and Form 8938.
Every non-US fund is a PFIC. Form 8621 must be filed for each fund annually. Omitting it leaves the return open indefinitely. A specialist identifies every PFIC position and files Form 8621 for every catch-up year.
Yes — if your non-compliance was non-wilful. The Streamlined program waives all FBAR penalties for a complete, accurate non-wilful submission. Additional US tax and interest owed must be paid.
