CPA vs DIY for Form 5472 - When to Self-File and When to Get Help
Summary
Form 5472 can be self-prepared for simple cases. Some situations call for CPA review. This guide covers when each path makes sense for foreign-owned LLC owners.
Form 5472 + Pro Forma 1120 can be self-prepared for many cases. For others, CPA review meaningfully improves outcomes. This guide covers when each path makes sense for foreign-owned LLC owners, with specific factors that tilt the decision.
Where the line between self-filing and CPA review falls
This is the comparison the rest of the page expands on. It sets the five factors that actually move the decision against what each one implies.
| Factor | Points to self-filing | Points to CPA review |
|---|---|---|
| Unfiled years | None or one | Four or more |
| Foreign related parties | One, the owner | Three or more |
| US-source effectively connected income | None, no US presence | Possible, US fulfilment or on-site work |
| IRS notice received | None | CP15 or CP215 in hand |
| Intercompany loans or IP licensing | None | Present |
Read down the column that matches your facts. One entry in the right-hand column is enough to justify getting help, and the notice row settles it on its own.
Self-preparation works for: single related party, current-year filings, no US-source effectively connected income, ordinary capital contributions and distributions. CPA review is appropriate for: multi-year catch-up cases, multiple foreign related parties, US-based fulfillment creating ECI, intercompany loans or IP licensing, multi-tier structures, post-notice cases, or any case where the assessment exceeds $25,000. filetax.co handles the simple end of that spectrum at $99 per year. Professional engagement is priced case by case and costs more, which is the trade being made when the facts are genuinely complex.
When self-preparation works well
Self-preparation (or use of an automated tool like filetax.co) works well for the most common foreign-owned LLC fact pattern:
- Single foreign related party (the foreign owner personally)
- Single tier (no foreign holdco above the LLC)
- Ordinary transactions (capital contributions, distributions)
- Current-year filing (filed by April 15 or by October 15 with extension)
- No US-source effectively connected income
- Standard formation through Stripe Atlas, Doola, Firstbase, or Northwest
For this profile, the form is relatively mechanical. The reportable transactions are clear, the related party is one person, the Pro Forma 1120 is mostly blank, and the mailing address is the dedicated Ogden address. A founder who reads the IRS instructions carefully or uses an automated tool can produce a correct filing.
When CPA review meaningfully helps
The decision tilts toward CPA review when one or more of these factors are present:
1. Multi-year catch-up exposure
If you have 3+ years of unfiled Form 5472 returns, the nominal exposure is $75,000+. Multi-year cases benefit from CPA review of the comprehensive reasonable cause statement, because a single coherent argument across all years is more credible than separate per-year statements. The narrative needs to explain why the failure persisted, which requires careful framing.
2. Multiple foreign related parties
Foreign-owned LLCs with multi-tier structures (Singapore Pte Ltd over US LLC, UK Ltd over US LLC, etc.) require identification and reporting of multiple related parties. Each related party may need its own Form 5472 or a separate Part II section in a consolidated filing. Mistakes in related-party identification can trigger audit risk.
3. US-source effectively connected income
If the LLC has US-based fulfillment (Amazon FBA, US 3PL warehouse, US-based services), the LLC may have effectively connected income. That triggers Form 1040-NR for the foreign owner in addition to Form 5472. The ECI analysis requires understanding of US source rules and trade-or-business thresholds.
4. Intercompany loans or IP licensing
Loans between foreign related parties and the LLC, or IP licensing arrangements between the LLC and a foreign IP-holding entity, create transfer pricing considerations. Whether intercompany terms are arm's length affects Form 5472 reporting, and can create transfer pricing exposure of its own under rules separate from the ones this site covers.
5. Post-notice cases (CP15 or CP215 received)
Once the IRS has assessed a penalty, the abatement request must address the IRS's position. Form 843 with a §6664(c) reasonable cause statement is the procedural vehicle, but the substantive arguments need to be calibrated to what the IRS examiner will respond to. CPA experience with §6038A cases improves outcomes.
6. Continuation penalty exposure
If the IRS notice is more than 90 days old and the underlying Form 5472 has not been filed, continuation penalty under §6038A(d)(2) is accruing at $25,000 per 30-day period. The case requires immediate filing of the underlying form plus a strong abatement request.
7. Owner relocation or status change
Foreign owners who have relocated to the US, become US tax residents, or have other status changes face overlapping foreign-side and US-side compliance. The transition period is complex.
8. Acquisition or investor diligence
If the LLC is being acquired or has investor scrutiny, the diligence team will scrutinize tax compliance. Pre-emptive CPA review and certification provides cleaner diligence outcomes.
Cost comparison
filetax.co: $99 per year for the Form 5472 and pro forma 1120 packet, current year or a missed one. Each additional related party is $25 per year. A reasonable cause letter is $199 per job, and one letter covers every year in that job rather than being charged per year.
Professional engagement: priced per case, and materially higher. Rates vary by firm, by country, and by how difficult the facts are, so treat any single figure quoted online as a guess rather than a quote. Ask for a fixed fee in writing before work starts.
The cost gap is real and so is the value gap, and which one dominates depends entirely on the five factors above. A founder who formed through Stripe Atlas, doola or Firstbase, files on time, and is the only related party sits squarely in the case the automated packet was built for. The further your facts sit from that description, the more a professional is worth paying for.
How to decide quickly
A 5-minute decision framework:
Question 1: Has the IRS contacted you?
- Yes, a notice has been received → CPA review appropriate
- No → Continue
Question 2: How many unfiled years?
- 0-1 → Self-preparation likely fine
- 2-3 → Self-preparation possible; consider CPA-Authored Reasonable Cause Letter
- 4+ → CPA review appropriate
Question 3: How many foreign related parties?
- 1 (just the foreign owner) → Self-preparation fine
- 2 (owner plus one foreign entity owner) → Self-preparation possible
- 3+ → CPA review appropriate
Question 4: Does the LLC have US-source effectively connected income?
- No / Unsure with no US presence → Self-preparation fine
- Possible (Amazon FBA, US 3PL, US clients with on-site work) → CPA review appropriate
Question 5: Does the structure include intercompany loans or IP licensing?
- No → Self-preparation fine
- Yes → CPA review appropriate
A "yes" on Q1 or "appropriate" on Q2-Q5 tilts the case toward CPA review.
If every answer landed on the self-filing side, that is the case filetax.co was built for: the completed Form 5472 and pro forma 1120 packet, in under 15 minutes, for $99 per year. If any answer landed on the other side, spend the money on judgement rather than on data entry.
What CPAs typically do that automation cannot
Beyond filing the forms, CPAs add value in:
- Reasonable cause framing. Tailoring the §6664(c) argument to the specific case facts and the IRS examiner's likely concerns.
- Multi-related-party allocation. Identifying which transactions involve which related parties and structuring the Form 5472 packages appropriately.
- Transfer pricing posture. Evaluating whether intercompany terms (loan rates, royalty rates, service fees) reflect arm's-length conditions and documenting the analysis.
- ECI analysis. Determining whether US-source income exists and whether Form 1040-NR is required.
- Notice response strategy. Calibrating the abatement request to the IRS's specific assessment and the procedural posture.
- Audit defense. Representing the LLC if the IRS examines the filing.
Deciding which side of the line your case sits on
For typical single-related-party, current-year, no-ECI cases, filetax.co generates the complete Form 5472 and pro forma 1120 packet for $99 per year, with an optional reasonable cause letter at $199 per job.
For complex cases, meaning multi-year, multi-related-party, ECI questions, post-notice or continuation exposure, a qualified CPA review is the appropriate next step.
Start with your penalty exposure and the relief paths open to you. For multi-year cases, see filing several years late. For a notice already in hand, see what CP15 and CP215 each mean, and for the abatement mechanics, Form 843 penalty abatement.
The IRS's official Form 5472 page is at IRS.gov/Form5472.
Frequently Asked Questions
I have 2 unfiled years and standard transactions. Self-prep or CPA?
Self-preparation with a careful reasonable cause statement is workable. The reasonable cause letter at $199 per job covers both years in one letter, which provides the substantive review without a full engagement.
I have an Amazon FBA business with US inventory. Self-prep or CPA?
CPA review. Amazon FBA may create effectively connected income, triggering Form 1040-NR in addition to Form 5472. The ECI analysis is non-trivial.
I received a CP215 notice. Should I respond myself?
Notice cases generally benefit from CPA review. The IRS has already taken a position by assessing the penalty. The abatement request must address that position directly.
How do I find a CPA who handles §6038A cases?
Look for an international tax practitioner who has handled foreign-owned US LLC compliance specifically, not general small-business tax work. Ask how many Form 5472 cases they have filed, whether they have written a reasonable cause statement that was accepted, and whether they will quote a fixed fee. A practitioner who cannot answer the first question is the wrong practitioner.
Is a CPA worth the cost for a Form 5472 case?
For a single related party, a current-year filing and no effectively connected income, no. The automated packet at $99 produces the same return for that fact pattern. For multi-year, post-notice, ECI or multi-related-party cases the difference is not the form, it is the argument attached to it, and that is where professional judgement earns its fee.
Can I start with self-prep and engage a CPA only if needed?
Yes, this is a common pattern. File the current year self-prep or via filetax.co. If complications arise (notice received, audit, transfer pricing question), engage a CPA for the specific issue. This minimizes ongoing cost while preserving access to expertise when needed.
Related pages
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Missed Form 5472: Penalty Exposure, Relief Paths, and How Bad Your Case Actually Is →
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Filed 5472 Multiple Years Late - Penalty Exposure and Your Options →
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