UK Accountant vs. Form5472.online for U.S. LLC Owners (2026)
By Arik Rozen, CPA, MBA Updated: September 2026 🇬🇧 United Kingdom
Short Answer
Your UK accountant — no matter how experienced — cannot legally sign U.S. tax forms for the IRS. ACA, ACCA, and CIMA are UK qualifications. The IRS requires a U.S.-licensed CPA or Enrolled Agent. If you own a U.S. LLC, you need a U.S. specialist for Form 5472 and Form 1120. Form5472.online is built for exactly that — at a flat $448, with no billing surprises.
The Core Problem: UK Credentials Don't Cross the Atlantic
Thousands of UK founders own U.S. LLCs — formed through Stripe Atlas, Firstbase, or Delaware agents — and instinctively turn to their UK accountant for help. That makes sense for HMRC filings. It doesn't work for IRS filings.
The IRS operates a Circular 230 system. Only U.S.-licensed CPAs, Enrolled Agents (EAs), and attorneys can sign returns, represent clients before the IRS, or provide IRS tax advice. UK qualifications — ACA (ICAEW), ACCA, CIMA — grant none of these rights with the IRS.
⚠ What this means in practice: Your UK accountant can help you understand your U.S. filing obligations in general terms, but they cannot prepare or sign Form 5472, Form 1120, or any IRS return on your behalf. If they do so anyway, you — not them — bear the legal risk.
What UK Accountants Can and Can't Do for Your U.S. LLC
Task | UK Accountant (ACA/ACCA/CIMA) | Form5472.online (U.S. CPA) |
File your UK Self Assessment (HMRC) | ✓ Yes — their core service | Out of scope |
Advise on UK tax treatment of U.S. LLC income | ✓ Yes | Out of scope |
Prepare Form 5472 (IRS) | ✗ No — not licensed | ✓ Yes — core service |
Prepare Form 1120 (IRS corporate return) | ✗ No — not licensed | ✓ Yes |
Sign IRS returns and represent before IRS | ✗ No — Circular 230 bars this | ✓ Yes — CPA-signed |
Apply the UK-US tax treaty to your situation | ✓ For UK side | ✓ For U.S. side |
Advise on DIIRSP (voluntary disclosure) | ✗ Not qualified | ✓ Yes |
Flat-fee pricing for Form 5472 + 1120 | Hourly — unpredictable | ✓ $448 flat |
The UK Accountant Route: What to Expect UK ROUTE
UK Accountant + U.S. Tax Referral
Some UK accountants who work with internationally mobile clients will have a U.S. CPA they refer out to. This can work — but it adds a layer.
Common providers:
TaxScouts — online UK tax service; handles Self Assessment well, no IRS capability
Blick Rothenberg — mid-size firm with a dedicated U.S. desk; strong for complex cross-border (executive relocation, dual-status returns); expensive
Price Bailey — has U.S. tax specialists; typically mid-tier pricing
BDO / Grant Thornton — large firms with U.S. practices; built for corporate clients, not lean LLCs
Typical cost for Form 5472 + 1120 via UK-linked firm: £800–£2,500+ depending on complexity and whether a formal engagement is opened for U.S. work.
Who this route suits: UK founders with complex cross-border needs — dual-status U.S. resident status, UK-US treaty elections (e.g. hybridity under HMRC's transparancy rules), or a U.S. operating subsidiary alongside the UK entity. If you just own a clean Delaware LLC with no U.S. employees or physical presence, the larger firm's cost is rarely justified.
The Form5472.online Route RECOMMENDED FOR MOST UK FOUNDERS
Form5472.online — U.S. CPA-led, LLC-specialist service
$448 flat — Form 5472 + Form 1120 (pro-forma) + filing
Form5472.online is built for exactly the situation most UK founders are in: a foreign-owned single-member LLC, no U.S. employees, no U.S. physical presence, annual IRS compliance only.
U.S. CPA-signed: Arik Rozen, CPA, MBA — Virginia License #025991 (verifiable at dhp.virginia.gov)
Flat fee: $448 covers Form 5472 + Form 1120 (pro-forma) + all IRS filing — no surprises
LLC-specialist: no individual returns, no HMRC work — purely U.S. entity compliance
Fast turnaround: 3–5 business days once your information is submitted
IRS-only filing method: Form 5472 cannot be e-filed; we fax to 855-887-7737 or send certified mail
DIIRSP: missed prior years? We guide you through voluntary disclosure
What it doesn't cover: your UK Self Assessment, UK corporation tax, HMRC reporting, or dual-status U.S. personal returns. For those, you still need your UK accountant.
Side-by-Side: Form 5472 Filing Specifically
Factor | UK Accountant | |
IRS authority to sign | ✗ None (ACA/ACCA/CIMA only) | ✓ U.S. CPA, Virginia #025991 |
Specialises in Form 5472 | ✗ Rarely | ✓ Core product |
Typical cost | £800–£2,500+ (via referral) | $448 flat |
Turnaround | 2–6 weeks | 3–5 business days |
HMRC Self Assessment | ✓ Yes — their core | ✗ Not in scope |
UK-US treaty interpretation (U.S. side) | ✗ Not qualified for U.S. side | ✓ Yes |
Voluntary disclosure (missed years) | ✗ Not qualified | ✓ Yes |
Fixed, transparent pricing | ✗ Hourly / estimate | ✓ $448 flat |
Popular UK Online Platforms: What They Can't Do
Several popular UK digital accounting platforms are well-suited to HMRC work but have no IRS capability whatsoever:
Platform | Good for | IRS Form 5472 |
TaxScouts | UK Self Assessment (HMRC) | ✗ No IRS capability |
Coconut | UK freelancer bookkeeping | ✗ No IRS capability |
Crunch | UK limited company accounting | ✗ No IRS capability |
GoSimpleTax | UK Self Assessment DIY | ✗ No IRS capability |
FreeAgent | UK bookkeeping + VAT | ✗ No IRS capability |
⚠ None of these platforms can prepare, review, or file Form 5472. If a UK platform tells you it handles your "U.S. tax obligations," ask specifically: does a U.S.-licensed CPA sign the IRS return? If not, your obligation is not covered.
The UK-US Tax Treaty: What It Does and Doesn't Do
The UK-US Income Tax Convention (1980, updated 2001) governs how income is taxed in both countries for UK residents with U.S. income. It does not:
Eliminate your Form 5472 filing obligation
Reduce the $25,000 per-form penalty for non-filing
Allow a UK accountant to prepare IRS returns
The treaty is primarily relevant for:
Avoiding double taxation on the same income stream
Determining residency for tax purposes when you have U.S. and UK ties
Reducing U.S. withholding rates on dividends, interest, and royalties paid to UK residents
Bottom line: The UK-US treaty helps your overall tax position. It doesn't eliminate your IRS reporting obligations — and it doesn't qualify your UK accountant to handle them.
Who Should Use Which Option
Your Situation | Best Fit |
Clean Delaware/Wyoming LLC, no U.S. staff, annual IRS compliance only | Form5472.online ($448 flat) |
LLC with U.S. employees, U.S. office, or complex treaty elections | UK firm with a U.S. desk (Blick Rothenberg, Price Bailey, BDO) |
Missed prior years — need voluntary disclosure | Form5472.online (DIIRSP guidance) |
HMRC Self Assessment only | Your UK accountant |
Both HMRC and IRS obligations | UK accountant for HMRC + Form5472.online for IRS — two separate engagements |
Frequently Asked Questions
Can my UK accountant just "refer" my Form 5472 work to someone in the U.S.?
Some do. The problem is coordination overhead, added cost, and the risk that the referral partner is a generalist rather than an LLC specialist. It's usually simpler and cheaper to go direct to a U.S. LLC specialist.
Can I use a U.S. tax software like TurboTax or TaxAct?
No. Form 5472 cannot be e-filed through any consumer software. It must be faxed to the IRS (855-887-7737) or mailed — and it must be attached to Form 1120. DIY filing without a professional frequently results in incomplete submissions and automatic $25,000 penalties.
My UK accountant says they can handle my "global tax situation." Does that include Form 5472?
Ask them directly: "Are you a U.S.-licensed CPA or Enrolled Agent? Will you sign Form 5472 under Circular 230?" If the answer to either is no, they cannot legally file IRS forms for you.
What if I've missed several years of Form 5472 filings?
The IRS has a voluntary disclosure path called DIIRSP (Delinquent International Information Return Submission Procedures). Potential penalties are significant but coming forward voluntarily before you're audited materially reduces your exposure. Form5472.online can guide you through this process.
Is the $448 really all-inclusive?
Yes — it covers Form 5472, the required Form 1120 (pro-forma annual return), preparation, and IRS filing for a single-member LLC with no U.S. employees and no U.S. physical presence. Complex structures (multiple transactions, U.S. personnel, treaty elections) are scoped separately.
Verify before you rely:
· IRS Circular 230 — practitioner requirements: irs.gov/tax-professionals/circular-230-tax-professionals
· IRS Form 5472 instructions: irs.gov/forms-pubs/about-form-5472
· Virginia CPA license verification (Arik Rozen #025991): dhp.virginia.gov
· UK-US Tax Convention (HM Treasury): gov.uk/government/publications/usa-tax-treaties
File Your U.S. LLC Taxes — $448 Flat
U.S. CPA-signed. Form 5472 + Form 1120. Fast turnaround. Built for UK founders.
AR Arik Rozen, CPA, MBA
U.S.-licensed CPA · Virginia License #025991 · Verifiable at dhp.virginia.gov
Arik specialises in IRS compliance for foreign-owned U.S. LLCs. He is not a UK accountant and does not provide HMRC advice. All IRS content on this site is prepared and reviewed by a licensed U.S. CPA.
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