Introduction
You have spent weeks reading articles, calling US firms that don't understand UK ISAs, and asking UK accountants who have never seen a Form 5471. You need someone who can answer all of it in one call — your Vanguard UK ISA's PFIC exposure, your Aviva workplace pension's Article 17 treatment, your missed FBARs, and the Form 14653 narrative that will decide your amnesty. That is what makes IRS Streamlined Filing a specialist problem rather than a general one, and that is why TaxYork exists.
This guide is written for Americans living in England, Scotland, Wales, and Northern Ireland — including dual US-UK citizens, Green Card holders, Accidental Americans, and UK entrepreneurs with US citizenship — who want to understand who we are, what we do differently, and why we are the right firm for your Streamlined catch-up. For broader context, see our service page at https://www.taxyork.com/services/.
What Is IRS Streamlined Filing?
IRS Streamlined Filing is the common name for the IRS Streamlined Filing Compliance Procedures, an official amnesty program designed for taxpayers whose past failure to report foreign income, file US returns, or submit FBARs was non-willful — meaning negligence, inadvertence, mistake, or a good-faith misunderstanding of the law.
For Americans living in the UK, the relevant track is the Streamlined Foreign Offshore Procedures (SFOP). It covers three years of late or amended Form 1040 returns, six years of FBARs (FinCEN Form 114), and a non-willfulness certification on Form 14653. The IRS waives all failure-to-file, failure-to-pay, accuracy, information-return, and FBAR penalties. The 5% offshore penalty under SDOP does not apply to qualifying UK-based filers.
UK banks now report your accounts to the IRS under FATCA through HMRC's Automatic Exchange of Information regime, so finding the right specialist quickly matters more every year. The official rules are at https://www.irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures.
Who Qualifies — US Expats in the UK Explained
To qualify for SFOP under the IRS Streamlined Filing program, you must meet the non-residency test. In at least one of the last three years for which the US tax return due date has passed, you were physically outside the United States for at least 330 full days and did not maintain a US abode. Almost every American genuinely living in the UK long-term meets this comfortably. You must also certify non-willfulness and not currently be under IRS examination or criminal investigation.
Several misconceptions cause real harm and are exactly why a specialist matters. The US-UK tax treaty does not eliminate Form 1040 filing — only a specialist will run the right Form 8833 elections. PAYE does not replace US filing. UK ISAs are not tax-free for US purposes and almost always trigger PFIC reporting via Form 8621. A long UK residence does not put you below the IRS's radar. Confirmation of expat filing rules is at https://www.irs.gov/individuals/international-taxpayers.
Why TaxYork Is the Go-To IRS Streamlined Filing Specialist for UK-Based Americans
This is the heart of the article, so here is what genuinely separates a US-UK Streamlined specialist from everyone else.
We are 100% US-UK focused — not "international tax."
TaxYork is not a US firm that occasionally sees a UK client, nor is it a UK firm that occasionally sees a US client. Every client we serve is a US person in the UK. That means we see UK ISAs, Self Assessment, Premium Bonds, NEST and Aviva workplace pensions, UK Limited companies, and the US-UK Income Tax Convention every single day. Generic "international tax" firms split their attention across forty countries — UK nuances drop through the cracks. We do not have to relearn UK ISA treatment from scratch every January.
Our team includes IRS-Enrolled Agents and CPAs
We are licensed to represent you directly before the IRS. Enrolled Agents (EAs) are federally authorized tax practitioners with unlimited rights of representation before the IRS. CPAs in our team bring full accounting credentials. Through executed Form 2848 (Power of Attorney), we deal with the IRS Austin processing center on your behalf — you do not have to.
We handle the technical depth that UK Streamlined cases require
PFIC analysis on Stocks and Shares ISAs, Form 8621 mark-to-market elections, GILTI computations under Internal Revenue Code Section 951A for UK Limited company owners, Section 962 elections, Form 5471 with Schedules M and Q, Form 8858 for check-the-box disregarded entities, Form 8865 for UK LLP members, Form 3520 for UK trusts and inheritances over $100,000, Article 17 pension elections via Form 8833, and the Totalization Agreement Certificate of Coverage for sole traders. These are routine for us; they break most generalists.
Fixed-fee pricing, no surprises
Most generalist firms charge by the hour, which inflates as soon as your case hits PFICs or treaty positions. TaxYork quotes a fixed fee after a free initial eligibility call — you know the total cost before any work begins.
We focus on the Form 14653 narrative.
A rejected Form 14653 is the single most expensive outcome of a botched Streamlined submission. We have written hundreds of these for UK clients across every common profile — long-term expats, Accidental Americans, mid-career discovery cases, UK founders, and mixed-nationality couples — and our narratives are accepted without follow-up correspondence.
Step-by-Step: How TaxYork Runs Your IRS Streamlined Filing Case
First, the free eligibility call. Within 30 minutes, we confirm SFOP eligibility under the non-residency test, screen for willfulness factors, scope your accounts and business structures, and quote a fixed fee.
Second, engagement and Form 2848. Engagement letters are signed digitally, the IRS Power of Attorney is executed so we can represent you directly, and document requests go out the same week.
Third, document gathering. We provide structured request lists for every UK account, ISA, NS&I product, pension, SIPP, and Ltd account you hold, with templates for chasing older statements from UK banks.
Fourth, return preparation. We draft three years of Form 1040, including an optimized Form 1116 (Foreign Tax Credit), Form 8938 when FATCA thresholds are met, Form 8621 for every PFIC, Form 8833 for treaty elections, and any Form 5471, Form 8858, Form 8865, or Form 3520 your situation requires.
Fifth, Form 14653 drafting and review. We draft the non-willfulness certification in close consultation with you, ensuring it is honest, specific, grounded in your real UK life, and free of language that could inadvertently describe willful conduct.
Sixth, submission and post-filing monitoring. Six years of FBARs are e-filed through https://bsaefiling.fincen.treas.gov/main.html; the courier sends the Form 1040 package to IRS Austin; any tax owed is settled; and we monitor IRS correspondence over the following three to six months.
The Streamlined Filing Compliance Procedures — Why a Specialist Outranks DIY or a Generalist
The Streamlined Filing Compliance Procedures run on two tracks. The SFOP for non-US-resident filers waives every penalty. SDOP for US-resident filers carries a 5% miscellaneous offshore penalty. For UK-based Americans, SFOP is almost always the right track, and the cost savings versus SDOP alone — typically £5,000 to £25,000 — pay for a specialist many times over.
DIY Streamlined attempts fail most often on three points: misidentified PFICs in UK ISAs, wrong elections between FTC and FEIE, and Form 14653 narratives the IRS rejects. Generalist accountants fail on the same three points, plus they miss information returns like Form 5471 and Form 8938. Specialist outcomes consistently beat both, with zero penalties for qualifying non-willful clients. The official Streamlined page is https://www.irs.gov/compliance/streamlined-filing-compliance-procedures.
Real UK Expat Scenario — TaxYork's IRS Streamlined Filing Approach in Practice
Daniel, a US-UK dual citizen who inherited a UK property in Yorkshire from his grandfather in 2022, contacted TaxYork in early 2026. He had lived in York his entire adult life, worked for the NHS, contributed to the NHS Pension Scheme, held HSBC personal and Marcus savings accounts, and had never filed a US tax return. The inherited Yorkshire property was worth £340,000, and Daniel had been receiving rental income of around £14,000 per year since the inheritance.
What we identified using the IRS Streamlined Filing route: SFOP eligibility was clearly intact, three years of Form 1040 needed including Schedule E for the rental income, Form 3520 for the foreign inheritance over $100,000 (one-year penalty exposure alone of $119,000 outside Streamlined), six years of FBAR, three years of Form 8938, Form 8833 for the NHS Pension under Article 17, depreciation analysis on the rental property in USD, and a Form 14653 narrative explaining a lifetime in the UK and good-faith assumption that UK tax was sufficient.
Outcome: full IRS compliance under SFOP, zero penalties (including the Form 3520 exposure waived), zero net US tax across the three years (Foreign Tax Credit fully offset the rental and NHS income), total professional fee approximately £4,800. Penalty exposure avoided: well over $130,000. For related reading, see https://www.taxyork.com/blog/.
Key IRS Deadlines for US Expats in the UK — 2026
The standard Form 1040 due date is 15 April 2026. US citizens living abroad receive an automatic two-month extension to 15 June 2026 with no form required, though interest still accrues from 15 April on tax owed. A further extension to 15 October 2026 is available by filing Form 4868 by 15 June. The FBAR (FinCEN 114) due date is 15 April 2026, with an automatic extension to 15 October, requiring no separate request. Form 8938 follows the return extension.
For Streamlined submissions, there is no calendar deadline — eligibility ends the moment the IRS opens an examination or criminal investigation. Current dates are at https://www.irs.gov/individuals/international-taxpayers/us-citizens-and-resident-aliens-abroad.
Penalties for Non-Compliance — Why a Specialist Pays for Itself
Outside of amnesty, the penalty schedule is genuinely punishing. FBAR non-willful penalties run up to $10,000 per form per year. Willful FBAR penalties are the greater of $100,000 or 50% of the account balance per year. Failure to file Form 1040 results in a 5% penalty on the unpaid tax per month, up to 25%. Form 8938 carries an initial penalty of $10,000, rising to $50,000. Form 5471 is $10,000 per company per year for UK Ltd directors. The Form 3520 penalty for unreported foreign trusts or inheritances is 35% of the amount.
A specialist running IRS Streamlined Filing correctly eliminates every one of these penalties for qualifying non-willful filers. The exposure avoided by working with TaxYork rather than going DIY or a generalist routinely runs $50,000 to $250,000 per submission. The IRS penalty relief overview is at https://www.irs.gov/payments/penalty-relief.
Common Mistakes UK-Based Americans Make Choosing a Preparer
Six mistakes recur in cases that come to us second. The first is hiring a US-only firm with no UK expertise — they miss ISA PFICs, UK pension treaty positions, and Self Assessment crossovers. The second is hiring a UK accountant with no US expertise — they file Form 1040 with no awareness of Form 5471, Form 8621, or Form 14653. The third is using a low-cost online expat tax service that produces template returns without specialist review. The fourth is choosing an hourly-rate firm whose costs balloon once PFICs and treaty positions appear. The fifth is going DIY and discovering the IRS rejects the Form 14653 narrative. The sixth is waiting too long — delays raise FATCA contact risk, ending Streamlined eligibility entirely.
The US-UK Tax Treaty — How a Specialist Uses It Correctly
The US-UK Income Tax Convention (1975, as amended) is genuinely useful but routinely misapplied by non-specialists. Article 17 allows you to defer US tax on UK pension growth and employer contributions through a Form 8833 election. Article 24 coordinates the UK State Pension with the US Social Security. Article 4 contains tie-breaking rules, though they are largely overridden by the saving clause in Article 1(4).
What the treaty does protect: the Foreign Tax Credit on Form 1116 typically eliminates US income tax on UK earnings; special pension treatment under Article 17; and Social Security coordination. What it does not eliminate: Form 1040, FBAR, FATCA, PFIC, or Form 3520 filings. A specialist prepares the appropriate Form 8833 disclosure for each relevant treaty position. The full treaty text is at https://home.treasury.gov/policy-issues/tax-policy/international-tax.
How TaxYork Helps Americans in the UK With IRS Streamlined Filing
TaxYork specializes exclusively in US-UK expat tax matters. Our team includes IRS-Enrolled Agents and CPAs authorized to represent taxpayers before the IRS, with day-to-day experience of UK ISAs, workplace pensions, SIPPs, PFIC analysis, treaty elections, Self Assessment crossovers, UK Limited companies, sole trader Schedule C work, Accidental American cases, and mixed-nationality married couples.
We run IRS Streamlined Filing submissions end-to-end with fixed-fee pricing quoted at the eligibility stage — eligibility analysis, six years of FBAR, three years of returns with optimized Form 1116, full Form 8938 and 8621 compliance, Article 17 treaty elections via Form 8833, Form 5471 or Form 8858 for entrepreneurs, Form 3520 for inheritances, and the Form 14653 narrative drafted to your real UK history. Contact TaxYork at info@taxyork.com or https://www.taxyork.com — we help Americans in the UK get fully IRS-compliant, almost always with all penalties eliminated.
Conclusion
Three things matter most for Americans living in the UK when choosing a Streamlined preparer. First, the work is genuinely specialist — UK ISAs trigger PFICs, UK pensions need Article 17 elections, UK Ltds need Form 5471 and GILTI, and the Form 14653 narrative decides the entire outcome. Second, generalist US and UK firms, and low-cost online services, miss the UK-specific obligations that drive penalty exposure. Third, a dedicated US-UK specialist like TaxYork delivers zero-penalty outcomes for qualifying non-willful clients at a fixed fee, paying for itself many times over by avoiding penalties. Contact TaxYork to start your IRS Streamlined Filing case with the right firm from day one.