Form 5472 is an information return required by the IRS for foreign-owned U.S. corporations or LLCs to report transactions with related parties.

Best Form 5472 Filing Services for Australian-Owned U.S. LLCs (2026)

Arik Rozen (CPA, MBA)

Oct 1

4 min read

SHORT ANSWER: form5472.online is the best option for Australian founders who need Form 5472 filed for a U.S. LLC — flat $349 USD, IRS-authorized U.S. CPA, no retainer. Below we rank the top services available to Australian LLC owners in 2026.

Australian founders with a U.S. single-member LLC face one clear IRS obligation each year: File Form 5472 + pro forma Form 1120 by April 15. Here are the best services available in 2026, ranked specifically for Australian residents.

KEY TAKEAWAYS

✅ Best overall: form5472.online — flat $349 USD, U.S. CPA, built for foreign-owned LLCs

✅ Best for complex U.S. tax needs: Greenback Expat Tax — higher price, broader scope

✅ Avoid: Australian firms that can't name their Circular 230-authorized U.S. preparer

✅ Avoid: software tools built for U.S. residents (1040 focused, not Form 5472 specialists)

1. form5472.online — Best Overall for Australian LLC Owners

Price: $349 USD flat | Timeline: 1–2 weeks | Authorization: U.S. CPA, IRS Circular 230

form5472.online handles the complete IRS filing for foreign-owned single-member LLCs: Form 5472 + pro forma Form 1120, signed by a U.S. CPA with full Circular 230 authorization.

The intake is online and takes 15–20 minutes for most Australian founders. You don't need to mail documents or schedule a call. International card payment accepted. No annual retainer — $349 USD per filing year.

Why it ranks #1 for Australian founders: it's priced and scoped for exactly what you owe. No Form 1040, no FBAR, no state returns. If your Australian LLC is your primary entity and your U.S. LLC is a pass-through for payments or Stripe processing, form5472.online is the right tool.

Best for: Australian founders with a Wyoming, Delaware, or New Mexico LLC, no U.S. employees, no U.S. physical presence, revenue from Australian or international clients. Zero-revenue returns welcome.

2. Greenback Expat Tax Services

Price: ~$800–$1,200 USD | Timeline: 3–6 weeks | Authorization: U.S. CPA

Greenback is a well-established U.S. expat tax firm that handles foreign-owned LLC filings as part of broader U.S. tax packages. Their CPA team is fully IRS-authorized and their quality is high.

The issue for most Australian LLC owners: Greenback prices their work as a full U.S. tax engagement. If all you need is Form 5472 + pro forma 1120, you'll pay 2.5–3× what form5472.online charges for the same core scope.

Best for: Australian founders who also have U.S.-source income, hold a U.S. Green Card, have U.S. bank accounts triggering FBAR obligations, or have complex multi-entity U.S. structures.

3. Australian Firms with U.S. Affiliates

Price: $800–$1,500 AUD typically | Timeline: 4–8 weeks | Authorization: Via U.S. partner

Some larger Australian accounting firms offer IRS filing services through U.S. affiliate networks. The Australian firm coordinates, and a U.S. CPA partner signs the return.

Quality varies significantly by firm. When evaluating, always ask: Who is the U.S. CPA signing this return, and what is their PTIN? If they cannot answer, the filing won't be compliant.

Pricing in AUD tends to be higher than form5472.online in USD terms, even at current exchange rates, because the Australian firm adds a coordination margin.

Best for: Australian founders who have an existing relationship with a large accounting firm and want the filing handled within that relationship for other coordination reasons.

4. Bench (Accounting + Tax)

Price: $249–$399/month + tax filing add-ons | Timeline: Varies | Authorization: Via in-house CPAs

Bench is a U.S. bookkeeping and accounting platform that offers bookkeeping plus tax filing packages. They do handle Form 5472 as part of their tax service.

The issue for standalone Form 5472 filers: Bench is primarily a bookkeeping subscription. If you don't need monthly bookkeeping (and most simple foreign-owned LLCs don't), you're paying a large monthly subscription for a service you'll use once a year.

Best for: Australian founders whose U.S. LLC has significant transaction volume and genuinely needs monthly bookkeeping, where the tax filing is a natural add-on to an existing Bench subscription.

5. Self-Filing

Price: $0 | Timeline: Self-paced | Authorization: Self-prepared

Self-filing Form 5472 is legal. The IRS publishes instructions and the forms are available at irs.gov. For a simple single-member LLC with one Australian owner and a clean transaction list, a self-prepared return is feasible.

The risk: the return must be signed, and the signer is legally responsible for its accuracy. An unsigned return or one with structural errors (e.g., failing to attach the pro forma 1120) is treated as unfiled, and the $25,000 penalty applies. For most Australian founders, the $349 cost of a professionally prepared return is straightforward insurance.

What to Ask Any Provider

Before engaging any service to file Form 5472, ask: (1) Is the preparer authorized under IRS Circular 230? (2) Who signs Form 5472 — and what is their PTIN? (3) Does the price include pro forma Form 1120 as the transmittal? (4) Do you handle IRS notices if one arrives after filing?

form5472.online answers yes to all four. For any provider that hedges on question 1 or 2, look elsewhere.

Bottom Line

For Australian founders with a straightforward U.S. LLC — no U.S. employees, no U.S. income, no FBAR complexity — form5472.online is the right choice at $349 USD flat. For more complex U.S. tax situations, Greenback or a specialized expat CPA is worth the higher cost. Start at form5472.online.