Introduction
You submitted your Streamlined Foreign Offshore Procedures package to the IRS Streamlined Filing Compliance Procedures unit in Austin nine months ago through a generalist US-based tax preparer. The package covered three years of late Form 1040 filings, six years of FBAR filings, and the Form 14653 non-willfulness certification. Last week, you received an IRS letter on Letterhead 105C ("Streamlined Filing Compliance Procedures — Certification Disagreement") indicating that the IRS has questions about the non-willfulness narrative and that your submission has been referred to the IRS examination function for further review. The letter cited specific narrative weaknesses, including the reference to an offshore brokerage account opened during a US business trip and the apparent gap between your annual UK salary and your reported account growth. The Streamlined Foreign Disclosure IRS appeals framework provides structured administrative review mechanisms — the IRS rejection or examination referral does not automatically convert your case to full pre-Streamlined penalty exposure.
This guide is written for UK-resident Americans whose IRS Streamlined Filing Compliance Procedures submissions have been rejected or referred to examination, US-UK dual citizens facing post-Streamlined audit examination, UK-resident filers receiving IRS Letter 105C or Letter 4789 (Streamlined Domestic Offshore Procedures Rejection) or similar IRS correspondence, and any UK-based American navigating IRS appeals or examination response after Streamlined submission. By the end, you will know exactly how the Streamlined Foreign Disclosure IRS appeals framework operates. For our broader cross-border service overview, see our Streamlined Foreign Offshore Procedures service.
What Is the Streamlined Foreign Disclosure IRS Appeals Framework (Definition and Overview)
The Streamlined Foreign Disclosure IRS appeals framework refers to the structured administrative review mechanisms available to taxpayers whose IRS Streamlined Filing Compliance Procedures submissions have been rejected, partially accepted with subsequent audit examination, or otherwise challenged by the IRS. The underlying Streamlined program operates through the IRS Streamlined Filing Compliance Procedures with two parallel tracks — Streamlined Foreign Offshore Procedures (SFOP) for US persons living abroad and Streamlined Domestic Offshore Procedures (SDOP) for US persons living in the United States. The IRS Streamlined Procedures reference sits at https://www.irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures.
For UK-resident American filers, the appeals framework operates through several distinct mechanisms depending on the underlying IRS action. First, the IRS Streamlined Filing Compliance Procedures unit in Austin directs correspondence response addresses initial Letter 105C ("Streamlined Filing Compliance Procedures — Certification Disagreement") or Letter 4789 ("Streamlined Domestic Offshore Procedures Rejection") through a written response to the specific concerns raised, typically with supplemental documentation and a revised Form 14653 narrative.
Second, the IRS Independent Office of Appeals administrative review applies when the Streamlined Filing Compliance Procedures unit position has been adopted by IRS examination, and the taxpayer seeks independent administrative review of that position. The Appeals Office reference sits at https://www.irs.gov/appeals.
Third, a Collection Due Process (CDP) hearing under IRC Sections 6320 and 6330 via Form 12153 (Request for a Collection Due Process or Equivalent Hearing) provides specific appeal rights when the IRS proceeds to lien filing under IRC Section 6320 or a levy proposal under IRC Section 6330 following Streamlined rejection. The Form 12153 must be filed within 30 days of the Notice of Federal Tax Lien filing or the Final Notice of Intent to Levy.
Fourth, Collection Appeal Request via Form 9423 provides alternative appeal rights for collection actions where the formal CDP hearing process does not apply. Fifth, the Taxpayer Advocate Service (TAS) escalation under IRC Section 7811 provides intervention for taxpayers experiencing significant IRS hardship or unresolved compliance issues. The IRS TAS reference sits at https://www.taxpayeradvocate.irs.gov/.
Sixth, a US Tax Court petition under IRC Section 6213(a) provides ultimate judicial review where the IRS has issued a Statutory Notice of Deficiency — the petition must be filed with the US Tax Court within 90 days of the Notice of Deficiency mailing date (150 days where the taxpayer is outside the United States).
This matters specifically in 2026 because the IRS Streamlined Filing Compliance Procedures unit Austin has materially increased Letter 105C issuance over the past 24 months following internal procedural updates, the September 2025 FATCA Intergovernmental Agreement data feed has produced increased cross-referencing of Streamlined submissions against UK bank records, and the IRS Independent Office of Appeals operates with materially more sophisticated international tax expertise than five years ago supporting better outcomes for UK-resident filers seeking administrative review.
Who Qualifies — US Expats in the UK Explained
UK-resident American filers qualify for the Streamlined Foreign Disclosure IRS appeals framework if they have received specific IRS correspondence indicating a Streamlined rejection, an examination referral, or a related collection action. The qualifying triggers include receipt of IRS Letter 105C (Streamlined Filing Compliance Procedures Certification Disagreement), receipt of IRS Letter 4789 (Streamlined Domestic Offshore Procedures Rejection — typically not applicable to UK-resident SFOP filers but procedurally similar), receipt of an examination referral letter indicating the Streamlined submission has been transferred to IRS examination function for further review, receipt of a Notice of Federal Tax Lien filing under IRC Section 6320, receipt of a Final Notice of Intent to Levy under IRC Section 6330, or receipt of a Statutory Notice of Deficiency under IRC Section 6212.
The qualifying triggers do not include the standard IRS Streamlined acceptance letter (Letter 6024 or similar) confirming Streamlined acceptance — the standard acceptance does not require appeal action, and the underlying compliance is concluded.
For UK-resident American filers, the most common appeal trigger is IRS Letter 105C following the Streamlined Filing Compliance Procedures unit's Austin review of the Form 14653 non-willfulness narrative. The Letter 105C typically identifies specific narrative weaknesses requiring response — common narrative weaknesses include unexplained offshore account activity inconsistent with the non-willfulness narrative, gaps between reported UK salary and accumulated UK account balances, references to US-based brokerage accounts opened during periods of US presence, complex international structures (offshore companies, foreign trusts) suggesting deliberate planning, and discrepancies between the Streamlined narrative and prior IRS filings or correspondence. The IRS Publication 54 reference is available at https://www.irs.gov/publications/p54.
UK-specific misconceptions for filers facing Streamlined appeals. First — "The IRS Letter 105C means my Streamlined is automatically rejected and full penalties apply." This is wrong. The Letter 105C typically initiates correspondence with the Streamlined Filing Compliance Procedures unit, where supplemental documentation, a revised Form 14653 narrative, and specialist representation can often lead to a favorable resolution without referral to full examination.
Second — "I should respond to the IRS Letter 105C myself before engaging a specialist to save costs." This is materially risky. The Letter 105C response is one of the most consequential elements of the entire Streamlined process — the response is reviewed by IRS Streamlined Filing Compliance Procedures unit personnel and subsequently by potential examination function personnel. Specialist representation at this stage is materially more important than at the initial Streamlined submission stage, given the increased IRS scrutiny.
Third — "The US-UK Tax Treaty provides specific appeals rights." This is partially wrong. The US-UK Income Tax Convention provides Article 26 Mutual Agreement Procedure (MAP) for treaty interpretation disputes. Still, the standard Streamlined appeals framework operates under US domestic IRS procedures rather than treaty-based MAP procedures. MAP is rarely the appropriate mechanism for Streamlined appeals.
Fourth — "I can just file a fresh Streamlined submission if the first one is rejected." This is wrong on the operational framework. The IRS Streamlined Filing Compliance Procedures unit treats the original submission as the operational document — a fresh submission after rejection typically returns to the same examination posture rather than restarting the process cleanly. The appeals framework for the original submission is the appropriate route.
Core Section: The Six Main Streamlined Foreign Disclosure IRS Appeals Mechanisms
Mechanism One — IRS Streamlined Filing Compliance Procedures unit Austin direct correspondence response
The first and most frequent Streamlined Foreign Disclosure IRS appeals mechanism is the direct correspondence response to IRS Letter 105C or similar Streamlined Filing Compliance Procedures unit Austin correspondence. The response typically takes 30-60 days from the original Letter 105C date. It addresses the specific concerns raised through supplemental documentation, a revised Form 14653 narrative addressing the identified weaknesses, supporting documentary evidence of the non-willfulness position, and, where applicable, detailed counterarguments to the IRS positions.
For UK-resident American filers the typical Letter 105C response covers detailed documentation of the UK accountant engagement framework (engagement letters, scope confirmations, fee correspondence), absence of US-side specialist advice (no prior US-side specialist engagement, no US-side correspondence on filing requirements), absence of concealment indicators (transparent UK banking history, UK tax-resident salary deposit patterns, normal life pattern over the relevant years), and proactive remediation pathway (Streamlined submission timing, specialist engagement timing, comprehensive scope of the catch-up).
The Streamlined Filing Compliance Procedures unit response typically arrives in 8-16 weeks of the response submission and either confirms acceptance of the original Streamlined position (the most common favorable outcome), proposes specific narrative or scope adjustments with revised acceptance (a freq,uent partially favorable outcome), or refers the matter to the IRS examination function for fuller review (a less common but materially adverse outcome).
Mechanism Two — IRS Independent Office of Appeals administrative review
The IRS Independent Office of Appeals is the second main appeals mechanism, operating where the Streamlined Filing Compliance Procedures unit position has been adopted by IRS examination and the taxpayer seeks independent administrative review. The Appeals Office is structurally independent from the IRS examination function — the Appeals Officer reviewing the case is not the same Revenue Agent who conducted the underlying examination.
The Appeals Office reference sits at https://www.irs.gov/appeals. Appeals review typically operates through written submissions and conference calls (in-person meetings can be requested but are less common for international taxpayers). UK-resident filers typically engage with the Appeals Office through written correspondence with their specialist representative, who coordinates the conference calls.
The Appeals Office settlement framework operates under a "hazards of litigation" analysis: the Appeals Officer evaluates the likely outcome if the case proceeds to Tax Court or another judicial forum, and settles the case on terms reflecting that analysis. For UK-resident American Streamlined cases, the hazards of litigation analysis typically support a materially favorable settlement, given the documented non-willfulness position and the IRS evidentiary burden for willfulness allegations.
Mechanism Three — Collection Due Process (CDP) hearing under IRC Section 6320 and IRC Section 6330 via Form 12153
The CDP hearing occurs when the IRS proceeds to collection action (a lien filing under IRC Section 6320 or a levy proposal under IRC Section 6330) following Streamlined rejection and tax assessment. The Form 12153 (Request for a Collection Due Process or Equivalent Hearing) must be filed within 30 days of the Notice of Federal Tax Lien filing or the Final Notice of Intent to Levy. The Form 12153 reference sits at https://www.irs.gov/forms-pubs/about-form-12153.
The CDP hearing provides a formal administrative hearing before the IRS Independent Office of Appeals at which the taxpayer can challenge the underlying tax liability (where no prior opportunity to challenge has occurred), propose collection alternatives (Installment Agreement, Offer in Compromise, Currently Not Collectible status, Innocent Spouse relief), or raise spousal defenses. The CDP determination is reviewable by the US Tax Court under IRC Section 6330(d).
Mechanism Four — Collection Appeal Request via Form 9423
The Form 9423 (Collection Appeal Request) provides alternative appeal rights for IRS collection actions where the formal CDP hearing process does not apply or where the 30-day CDP window has been missed. The Form 9423 covers proposed levies, denied or terminated Installment Agreements, lien filings where CDP rights have lapsed, levies on retirement accounts, and similar collection actions. The Form 9423 reference is available at https://www.irs.gov/forms-pubs/about-form-9423.
Mechanism Five — Taxpayer Advocate Service (TAS) escalation under IRC Section 7811
The Taxpayer Advocate Service is an independent organization within the IRS that provides intervention for taxpayers experiencing significant IRS hardship, unresolved compliance issues, or systemic IRS process failures. TAS engagement under IRC Section 7811 is typically appropriate when the underlying IRS process has materially failed (e.g., extended IRS delays, repeated IRS process errors, or IRS failure to follow internal procedures) or when the taxpayer faces significant financial or operational hardship from the IRS action. The IRS TAS reference sits at https://www.taxpayeradvocate.irs.gov/.
For UK-resident American Streamlined filers, TAS engagement is occasionally appropriate when the Streamlined Filing Compliance Procedures unit's Austin response is materially delayed (more than 12 months without acceptance or rejection), the IRS examination function has materially exceeded normal procedural timelines, or the underlying IRS process has produced demonstrable procedural error.
Mechanism Six — US Tax Court petition under IRC Section 6213(a)
The US Tax Court petition under IRC Section 6213(a) provides judicial review when the IRS issues a Statutory Notice of Deficiency under IRC Section 6212. The petition must be filed with the US Tax Court within 90 days of the mailing date of the Notice of Deficiency (150 days if the taxpayer is outside the United States, including UK residence).
A Tax Court petition is the ultimate judicial review mechanism for IRS tax assessment disputes and results in a fully litigated determination of the underlying tax liability. The Tax Court reference is part of the broader US federal court framework.
Step-by-Step: How US Expats in the UK Pursue Streamlined Foreign Disclosure IRS Appeals
The first step is the IRS correspondence triage and the calculation of the timeline. Upon receipt of any IRS correspondence following Streamlined submission the specialist identifies the specific letter type (Letter 105C, examination referral, Notice of Federal Tax Lien, Final Notice of Intent to Levy, Statutory Notice of Deficiency), calculates the applicable response deadline (30 days for CDP, 60-90 days for typical correspondence responses, 90/150 days for Tax Court petition), and identifies the appropriate appeals mechanism for the specific correspondence type.
The second step is the comprehensive case diagnosis. The specialist reviews the original Streamlined submission documentation (Form 14653 narrative, three-year Form 1040 catch-up, six-year FBAR, supporting documentation), the IRS correspondence content (specific concerns raised, identified narrative or substantive weaknesses, requested supplemental documentation), the broader factual matrix (UK accountant engagement history, US-side specialist advice history, UK banking history, life context), and the appeals mechanism selection. The IRS Streamlined Procedures reference is available at https://www.irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures.
The third step is the specialist representation engagement. UK-resident American filers facing Streamlined appeals materially benefit from specialist representation through Form 2848 Power of Attorney, enabling the specialist to correspond directly with the IRS Streamlined Filing Compliance Procedures unit, IRS examination function, or IRS Independent Office of Appeals on the taxpayer's behalf. The Form 2848 reference sits at https://www.irs.gov/forms-pubs/about-form-2848.
The fourth step is the gathering of supplemental documentation and the drafting of the revised Form 14653 narrative, where the appeals mechanism is direct correspondence or examination dialogue. Typical supplemental documentation includes detailed UK accountant engagement letters, fee correspondence, and scope confirmations covering the relevant years, UK bank statements demonstrating transparent banking patterns consistent with the non-willfulness positioning, UK employment documentation supporting the salary-to-account-growth relationship, US travel records demonstrating limited US presence, and any other documentary evidence of the substantive non-willfulness position.
The fifth step is the formal response submission to the appropriate IRS office. The Letter 105C response is typically submitted by certified mail to the IRS Streamlined Filing Compliance Procedures unit address specified in the original correspondence. CDP hearing requests via Form 12153 are submitted by certified mail to the IRS office identified in the underlying lien or levy notice. Appeals Office submissions follow the specific assignments assigned to each Appeals Officer.
The sixth step is the ongoing management of correspondence and conference calls. UK-resident American filers typically engage with the IRS through their specialist representative across multiple correspondence rounds over 6-18 months, depending on the complexity of the case and the IRS office involved.
The seventh step is the resolution achievement and going-forward integration. Successful Streamlined appeals resolution typically achieves either full Streamlined acceptance confirmation (the most favorable outcome), partial Streamlined acceptance with revised scope, or a modest penalty (a frequent, partially favorable outcome), or an alternative resolution through the Offer in Compromise or Installment Agreement framework. The going-forward compliance workflow integrates the resolved Streamlined position with current-year filing obligations.
The Streamlined Filing Compliance Procedures — What UK Expats Need to Know
The Streamlined Filing Compliance Procedures is the underlying IRS program that the Streamlined Foreign Disclosure IRS appeals framework operates upon. The Streamlined Foreign Offshore Procedures (SFOP) is the principal voluntary disclosure program for US persons living outside the United States with non-willful past US tax non-compliance, applicable to UK-resident Americans on the standard baseline terms. The IRS Streamlined Procedures reference sits at https://www.irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures.
The SFOP package consists of three years of late or amended Form 1040, six years of FBAR via the FinCEN BSA E-Filing System at https://bsaefiling.fincen.treas.gov, and the Form 14653 non-willfulness certification, with zero federal penalties for eligible non-willful filers. Most UK-resident American Streamlined submissions proceed through to IRS acceptance without appeals — the IRS Streamlined Filing Compliance Procedures unit in Austin processes the vast majority of submissions through routine acceptance within 18-26 weeks.
The minority of submissions that produce Letter 105C correspondence or examination referral typically share common characteristics — Form 14653 narrative weaknesses (generic template language, gaps in the chronology, references to potentially concerning facts without adequate explanation), substantive factual concerns (unexplained offshore activity, complex structures, US-based brokerage activity during US presence), or technical execution issues (incomplete documentation, missing forms, calculation errors). Specialist preparation of the original Streamlined submission substantially reduces the Letter 105C exposure relative to generalist or self-prepared submissions.
For comprehensive Streamlined catch-up engagement, including appeals representation, see our Streamlined Foreign Offshore Procedures service. The official IRS Streamlined Procedures reference is available at https://www.irs.gov/individuals/international-taxpayers/streamlined-filing-compliance-procedures.
Real UK Expat Scenario — Streamlined Foreign Disclosure IRS in Practice
Case Study: A York-Based American Receiving IRS Letter 105C Nine Months After Streamlined Submission
Michael is a US citizen aged 46, working as a senior IT consultant at a York-based technology consultancy on an annual salary of £ 105,000. He moved from San Francisco to York in 2016 to take up the position. He is single and lives in a two-bedroom flat in York city center. His UK financial position includes a Lloyds current account, a Marcus by Goldman Sachs UK savings account, a Vanguard UK Stocks and Shares ISA worth £58,000, a workplace pension worth £125,000, and a Hargreaves Lansdown SIPP worth £45,000. He also retained a Charles Schwab US brokerage account ($285,000) and a Fidelity 401(k) account ($215,000) from his pre-York employment.
In January 2025, Michael engaged a generalist US-based tax preparer (a sole practitioner CPA in Texas) to prepare the Streamlined Foreign Offshore Procedures package. The Texas CPA had limited international tax experience but offered a competitive fixed fee of $2,800 for the comprehensive Streamlined package. The Streamlined submission covered three years of Form 1040 (2021, 2022, 2023) with Form 2555 Foreign Earned Income Exclusion positioning (rather than Form 1116 Foreign Tax Credit positioning), six years of FBAR via FinCEN BSA E-Filing, and a Form 14653 non-willfulness narrative based on a generic template. The submission was filed in April 2025.
In late January 2026, Michael received IRS Letter 105C from the Streamlined Filing Compliance Procedures unit in Austin. The Letter 105C identified three specific concerns with the Form 14653 narrative. First, the narrative referenced "occasional US business travel" without specifying dates, duration, or activities. The IRS noted that Michael's passport records showed 12 US business trips during the relevant period, totaling 87 days, which the narrative had not addressed. Second, the narrative did not adequately explain why Michael had retained the Charles Schwab US brokerage and Fidelity 401(k) without parallel US tax filing — the IRS suggested this indicated US-side awareness of US tax obligations. Third, the narrative did not adequately address the Vanguard UK ISA growth pattern from £18,000 (2019 opening balance) to £58,000 (2024 closing balance), given that Michael's annual UK salary did not appear to support that growth pattern through subscription contributions alone.
Michael contacted his original Texas CPA, who acknowledged limited experience with Streamlined appeals and recommended that Michael engage a UK-US specialist firm. Michael contacted TaxYork in early February 2026 for emergency representation in Streamlined appeals.
The TaxYork diagnostic identified the full scope of Streamlined appeals. The Form 14653 narrative had material weaknesses requiring comprehensive revision. The Form 2555 FEIE positioning was suboptimal compared with the Form 1116 FTC positioning, given Michael's £105,000 UK salary above the UK higher-rate threshold, resulting in sufficient UK Income Tax to fully absorb US tax through Form 111. The retained Charles Schwab US brokerage and Fidelity 401(k) had specific innocent explanations (employer-administered 401(k) rollover restrictions, Schwab account retention for occasional US travel cash access). The Vanguard UK ISA growth pattern had a specific explanation: market appreciation of the underlying fund positions combined with regular subscription contributions.
The TaxYork representation strategy proceeded through several coordinated workstreams. First, Form 2848, Power of Attorney, was filed with the IRS Streamlined Filing Compliance Procedures unit in Austin, authorizing TaxYork to correspond on Michael's behalf. Second, comprehensive supplemental documentation was assembled covering Michael's US travel chronology (passport records, employer travel authorisation records, business meeting calendars, hotel and flight records demonstrating brief business-only US presence), UK accountant engagement framework (engagement letters from Michael's York-based generalist UK accountant covering 2016-2024 with scope limited to UK Self Assessment and HMRC compliance), Vanguard UK ISA growth analysis (Vanguard quarterly statements demonstrating £4,000 annual subscription contributions plus £15,500 accumulated market appreciation across the underlying fund positions over the relevant period), and Charles Schwab US brokerage retention explanation (no transactions other than dividend reinvestment, no withdrawals, retention for occasional US travel cash access only).
Third, the Form 14653 non-willfulness narrative was comprehensively revised. The revised narrative documented Michael's relocation from San Francisco to York in 2016 for the IT consultancy position, the specific US business travel chronology (twelve trips totalling 87 days across 2017-2024, all employer-authorised business meetings with no personal extension or US-based income generation), the retention of the Charles Schwab US brokerage and Fidelity 401(k) (with specific explanation of employer-administered 401(k) rollover restrictions and Schwab dormant retention with no transactions), the engagement of the York-based generalist UK accountant whose scope was limited to UK Self Assessment and who had no awareness of US-side filing requirements, the absence of any prior US-side specialist consultation, the absence of any concealment indicators or offshore structures, and the proactive remediation through Streamlined submission upon learning of the obligation. The narrative also addressed the Vanguard UK ISA growth pattern by drawing on detailed references to the Vanguard statement evidence and the market appreciation versus subscription decomposition.
Fourth, the revised three-year Form 1040 catch-up was prepared with Form 1116 Foreign Tax Credit positioning replacing the original Form 2555 FEIE positioning. The Form 1116 FTC positioning absorbed substantially all US tax on Michael's UK salary substantially through credit relief on UK Income Tax already paid via UK PAYE, generated approximately $32,000 of accumulated FTC general category carryforward, and preserved Michael's earned income basis for any future Schedule 8812 refundable Additional Child Tax Credit eligibility (relevant if Michael's family circumstances change). Form 8833 treaty election was added on the workplace pension and Hargreaves Lansdown SIPP under Article 18(5). Form 8621 PFIC analysis was added for the underlying fund holdings in the Vanguard UK ISA and the Hargreaves Lansdown SIPP, with a Section 1296 mark-to-market election on the marketable PFIC positions.
The comprehensive Letter 105C response package (revised Form 14653 narrative plus supplemental documentation plus revised three-year Form 1040 with Form 1116 FTC repositioning plus revised Form 8621 PFIC schedules plus Form 8833 treaty election) was submitted by certified mail to the IRS Streamlined Filing Compliance Procedures unit in Austin in late March 2026 within the 60-day response window specified in the original Letter 105C.
The IRS Streamlined Filing Compliance Procedures unit responded approximately 12 weeks later (mid-June 206), confirming full acceptance of the revised Streamlined submission and zero federal penalties on the three-year Form 1040 catch-up and the six-year FBAR catch-up. The Streamlined Filing Compliance Procedures unit accepted the revised Form 14653 narrative, the Form 1116 FTC repositioning, and the supplemental documentation, with no referral to the IRS examination function. The Streamlined acceptance letter was issued in late June 2026.
The outcome was comprehensive Streamlined acceptance through the Letter 105C response framework with zero federal penalties confirmed, $32,000 of accumulated Form 1116 FTC carryforward established (versus zero FTC under the original Form 2555 FEIE positioning), Form 8833 treaty election established on UK workplace pensions, Form 8621 PFIC repositioning established with Section 1296 mark-to-market on marketable positions, and going-forward integrated annual workflow established under £2,400 annual fee. Total TaxYork engagement fee for the Streamlined appeals representation was approximately £6,800 — a clear positive outcome against the original Texas CPA fee of $2,800 (which had produced the suboptimal Form 2555 FEIE positioning and the materially weak Form 14653 narrative that had triggered the Letter 105C).
Penalties for Non-Compliance — What UK-Based Americans Risk
The penalty exposure for Streamlined rejection without successful appeals resolution reverts to the full pre-Streamlined penalty framework. The FBAR penalty framework post-Bittner v United States 598 US 85 (2023) operates at approximately $16,000 per non-willful violation per year and approximately $159,000 per willful violation per year, or 50 percent of the account balance. For UK-resident American filers with 6 years of FBAR noncompliance, the non-willful exposure can reach $100,000+, and the willful exposure can reach 50% of the account balance. The FinCEN BSA E-Filing reference sits at https://bsaefiling.fincen.treas.gov.
The Failure-to-File penalty under IRC Section 6651(a)(1) operates at 5 percent per month on unpaid tax up to 25 percent. The Failure-to-Pay penalty under IRC Section 6651(a)(2) operates at 0.5 percent per month on unpaid tax up to 25 percent. The Form 8938 FATCA penalty under IRC Section 6038D imposes an00 initial penalty of $10,000 per year, with a continuation penalty cap of $50,000 per year.
The Form 3520 penalty under IRC Section 6677 operates at 35 percent of the unreported foreign trust transaction amount or 5 percent of the unreported foreign gift amount. The Form 5471 penalty under IRC Section 6038(b) operates at a $10,000 base penalty per missed Form 5471 per year, with a $50,000 continuation cap.
Successful Streamlined Foreign Disclosure IRS appeals resolution typically restores the zero federal penalty framework that the original Streamlined submission was intended to achieve — the appeals framework provides the structured administrative route to preserve the Streamlined zero-penalty outcome where the original submission has been challenged.
For UK-resident American filers facing Streamlined appeals the alternative outcomes include full Streamlined acceptance confirmation (most favourable — zero federal penalties), partial Streamlined acceptance with revised scope and modest penalty (frequent — substantially reduced penalty exposure relative to pre-Streamlined framework), Offer in Compromise resolution under Form 656 (where substantial compromise is achievable on financial hardship grounds), or Installment Agreement framework under Form 9465 for any surfaced unpaid balance. The IRS penalty relief reference sits at https://www.irs.gov/payments/penalty-relief.
Common Mistakes Americans in the UK Make With Streamlined Foreign Disclosure IRS Appeals
The first mistake is responding to IRS Letter 105C without specialist representation. The Letter 105C response is one of the most consequential elements of the entire Streamlined process — generalist or self-prepared responses frequently result in escalation to the IRS examination function rather than a favorable resolution at the Streamlined Filing Compliance Procedures unit level. Specialist representation at the Letter 105C stage is materially more important than at the original Streamlined submission stage.
The second mistake is missing the 30-day deadline to file Form 12153, a Collection Due Process hearing request, after receiving a Notice of Federal Tax Lien or a Final Notice of Intent to Levy. The 30-day deadline is statutory and cannot typically be extended — missing it forfeits CDP rights and the corresponding US Tax Court review framework. However, Form 9423 Collection Appeal Request may provide an alternative appeals route. The IRS Form 12153 reference sits at https://www.irs.gov/forms-pubs/about-form-12153.
The third mistake is filing a fresh Streamlined submission after the original submission has been rejected. The IRS Streamlined Filing Compliance Procedures unit treats the original submission as the operational document — a fresh submission typically returns to the same examination posture rather than restarting cleanly. The appeals framework for the original submission is the appropriate route.
The fourth mistake is engaging in informal correspondence with the IRS without a Form 2848 Power of Attorney covering the specialist representative. Form 2848 establishes the formal authority for the specialist to correspond directly with the IRS Streamlined Filing Compliance Procedures unit, the examination function, or the Independent Office of Appeals. Without Form 2848, the IRS typically refuses to discuss specific case details with the specialist. The Form 2848 reference is available at https://www.irs.gov/forms-pubs/about-form-2848.
The fifth mistake is failing to address the specific concerns raised in the IRS Letter 105C. The Letter 105C identifies specific narrative weaknesses or substantive concerns — generic responses that do not address these concerns, resulting in a production escalation rather than a favorable resolution. The response must comprehensively address each identified concern with specific supplemental documentation and a revised narrative.
The sixth mistake is underestimating the importance of the Form 1116 Foreign Tax Credit versus Form 2555 Foreign Earned Income Exclusion positioning decision in the original Streamlined submission. Generalist preparation frequently defaults to Form 2555 FEIE despite Form 1116 FTC being materially preferable for UK higher-rate-earning filers. The Streamlined appeals process provides an opportunity to reposition Form 1116 FTC, where the original submission used Form 2555 FEIE.
The US-UK Tax Treaty — How It Affects Streamlined Foreign Disclosure IRS Appeals
The US-UK Income Tax Convention (1975 as amended) provides limited direct application to the Streamlined appeals framework — the appeals operate under US domestic IRS procedures rather than treaty allocation. However, the broader treaty framework affects substantive positions taken in the Streamlined submission and the related appeals representation.
Article 1(4) Saving Clause preserves US worldwide taxation rights on US citizens regardless of UK residence — the substantive underlying tax position in the Streamlined catch-up operates under the Saving Clause framework. The US Treasury treaty page is at https://home.treasury.gov/policy-issues/tax-policy/international-tax.
Article 24 Relief from Double Taxation provides credit relief through Form 1116 Foreign Tax Credit on the US side — the proper Form 1116 FTC positioning in the Streamlined catch-up substantially affects the underlying US tax liability and the relevance of the unpaid balance for collection action.
Article 26 of the Mutual Agreement Procedure (MAP) provides for treaty interpretation dispute resolution, but is rarely the appropriate mechanism for Streamlined appeals. MAP is more appropriate for treaty-specific interpretation disputes (e.g., disagreements over Article 18 pension treatment or Article 4 residence tiebreaker application) than for the standard non-willfulness narrative or substantive tax position disputes within Streamlined.
Article 18(5) Pension Schemes provides Form 8833 treaty election guidance for UK workplace pensions and SIPPs — the Form 8833 election operates as a substantive position within the Streamlined catch-up, affecting both the underlying tax liability and the related appeals positioning.
What the treaty does NOT eliminate. The IRS Streamlined Filing Compliance Procedures unit's jurisdiction over Streamlined submissions continues regardless of treaty position. The IRS Independent Office of Appeals administrative review framework operates under US domestic procedures. The IRS's collection authority under IRC Sections 6320 (lien) and 6330 (levy) continues regardless of treaty position. The US Tax Court petition framework under IRC Section 6213(a) continues to apply regardless of the treaty position.
UK-specific nuances for Streamlined appeals. UK Income Tax paid via UK PAYE or UK Self Assessment flows through Form 1116 FTC on the US side, providing proper credit relief. Propositioning in the appeals response substantially affects the underlying tax liability. UK ISA tax treatment is not recognized on the US side — the underlying fund holdings are PFIC positions that require Form 8621 filings. UK workplace pension contributions and growth are addressable through Form 8833 treaty election under Article 18(5).
How TaxYork Helps Americans in the UK With Streamlined Foreign Disclosure IRS Appeals
TaxYork is a US expat tax specialist firm focused exclusively on Americans living in the United Kingdom. Our team holds US IRS Enrolled Agent credentials supporting comprehensive Streamlined Foreign Disclosure IRS appeals representation including Form 2848 Power of Attorney filing with the IRS Streamlined Filing Compliance Procedures unit Austin, IRS examination function, or IRS Independent Office of Appeals, comprehensive case diagnostic across the original Streamlined submission documentation and the specific IRS correspondence content, revised Form 14653 non-willfulness narrative drafting addressing the specific concerns raised in the IRS correspondence, supplemental documentation gathering including UK accountant engagement framework, UK banking history, UK employment documentation, and US travel chronology, Form 1116 Foreign Tax Credit repositioning where the original submission used Form 2555 Foreign Earned Income Exclusion, Form 8833 treaty election under Article 18(5) on UK workplace pensions and SIPPs, Form 8621 PFIC repositioning with Section 1296 mark-to-market elections, Letter 105C response submission by certified mail to the IRS Streamlined Filing Compliance Procedures unit Austin, Form 12153 Collection Due Process hearing request submission where applicable, Form 9423 Collection Appeal Request submission where applicable, IRS Independent Office of Appeals representation through written submissions and conference calls, Taxpayer Advocate Service escalation where significant IRS hardship or process failure exists, and US Tax Court petition coordination where a Statutory Notice of Deficiency has been issued.
For UK-resident American filers facing Streamlined appeals, we deliver the full coordinated representation workstream from initial IRS correspondence triage through resolution, with a going-forward integrated annual workflow that combines the resolved Streamlined position with current-year filing obligations. You can read our broader guidance on our Streamlined Foreign Offshore Procedures service.
Contact TaxYork today at info@taxyork.com or visit https://www.taxyork.com/services/ — we help Americans in the UK navigate the Streamlined Foreign Disclosure IRS appeals framework to preserve the Streamlined zero-penalty resolution where the original submission has been challenged.
Conclusion
Three takeaways matter most for UK-resident American filers facing Streamlined Foreign Disclosure IRS appeals in 2026. First, IRS Letter 105C, examination referral, or other adverse IRS correspondence following Streamlined submission does NOT automatically reinstate the full pre-Streamlined penalty exposure — the appeals framework operates through structured administrative mechanisms (Streamlined Filing Compliance Procedures unit Austin direct correspondence response, IRS Independent Office of Appeals administrative review, Collection Due Process hearing under IRC Section 6320 and IRC Section 6330 via Form 12153, Collection Appeal Request via Form 9423, Taxpayer Advocate Service escalation under IRC Section 7811, and US Tax Court petition under IRC Section 6213(a)) that frequently produce favourable resolution preserving the Streamlined zero-penalty outcome. Second, the Letter 105C response is the single most consequential element of the entire Streamlined appeals process — specialist representation at the Letter 105C stage is materially more important than at the original Streamlined submission stage given the increased IRS scrutiny and the consequences of generalist response weaknesses, with the response typically comprising revised Form 14653 narrative addressing the specific concerns plus comprehensive supplemental documentation plus where applicable Form 1116 Foreign Tax Credit repositioning from Form 2555 Foreign Earned Income Exclusion. Third, statutory deadlines for the various appeals mechanisms are unforgiving — 30 days for Form 12153 Collection Due Process hearing request following Notice of Federal Tax Lien or Final Notice of Intent to Levy, 90/150 days for US Tax Court petition following Statutory Notice of Deficiency, and typically 30-60 days for Streamlined Filing Compliance Procedures unit Austin direct correspondence response — making prompt specialist engagement upon receipt of adverse IRS correspondence materially important. Speak to a TaxYork adviser today by emailing info@taxyork.com or visiting https://www.taxyork.com/services/.