CPA-Prepared vs DIY Form 5472: Honest Comparison
Updated June 2026 · Reviewed by a Form 5472 specialist
Updated June 2026 · Reviewed by a Form 5472 specialist
The short answer
Key takeaways
A CPA typically charges between $400 and $800 to prepare Form 5472 with the pro forma Form 1120 for a foreign-owned single-member LLC. Some bundle it into a broader engagement that runs $1,000 or more, often billing extra by the hour.
Form 5472 is a niche international filing, so general-practice CPAs price it as specialty work. The fee depends on the firm, the complexity of your reportable transactions, and whether the CPA already prepares other returns for you. For a clean foreign-owned SMLLC with a handful of capital contributions, the typical range is $400-$800. Add bookkeeping cleanup, multiple owners, or catch-up years and that figure climbs quickly.
| Engagement | Typical CPA fee | What is included |
|---|---|---|
| Single-member LLC, simple | $400-$600 | Form 5472 + pro forma 1120 |
| Single-member LLC, complex | $600-$800 | Plus transaction classification work |
| Bundled with full bookkeeping | $1,000+ | Books, reconciliation, the filing |
| Catch-up of prior years | $400-$800 per year | One package per missed year |
Source: form5472.tax survey of US CPA firms preparing foreign-owned LLC filings. Verified June 2026.
Compare those figures to a fixed-price specialist on the pricing page before you commit.
Yes — you can legally file Form 5472 yourself, and the IRS charges nothing to file. But a foreign-owned single-member LLC cannot e-file; you must mail to P.O. Box 149342, Austin, TX 78714-9342 or fax 855-887-7737, and any error risks $25,000.
Nothing in the law requires a paid preparer. You can download Form 5472 and the pro forma Form 1120, fill them in, and send them in by the April 15 deadline (or October 15 with Form 7004). The catch is that this exact package has no e-file path — consumer tax software will not produce it — so DIY means assembling the forms by hand and sending them by the two accepted methods only.
The step-by-step is on how to file Form 5472, and the line-by-line walkthrough is on the Form 5472 instructions page.
| Method | Where | Proof to keep |
|---|---|---|
| P.O. Box 149342, Austin, TX 78714-9342 | Certified-mail receipt | |
| Fax | 855-887-7737 | Fax transmission confirmation |
Source: IRS Instructions for Form 5472 (foreign-owned U.S. disregarded entity). Verified June 2026.
The headline risk is the $25,000 penalty under IRC §6038A(d), which applies per form, per year, even for an honest mistake or a one-day-late filing. There is no cap and no statute of limitations, and an extra $25,000 accrues every 30 days after a 90-day notice.
DIY is only "free" if you get it perfect. The most common first-timer mistakes all trigger the same flat penalty: omitting the pro forma Form 1120, misclassifying capital contributions, leaving Part V blank, using the wrong reporting period, or filing by an unaccepted method. Because there is no statute of limitations on an unfiled information return under §6501(c)(8), a year you got wrong can be assessed years later.
| DIY mistake | Consequence |
|---|---|
| Filed Form 5472 without the pro forma 1120 | Treated as not filed — $25,000 |
| Missed the April 15 / October 15 deadline | $25,000, even one day late |
| Tried to e-file (not allowed for SMLLC DE) | Rejected — risks a late filing |
| Misclassified reportable transactions | Penalty if deemed incomplete |
| No proof of mailing or fax | Hard to contest an assessment |
Source: IRC §6038A(d), §6501(c)(8); IRS Instructions for Form 5472. Verified June 2026.
Read the full rule on the instructions page so you understand exactly what counts as a complete filing.
Almost certainly yes. Virtually every foreign-owned single-member LLC has at least one reportable transaction — even funding the LLC or paying its formation fee counts — so almost all must file under the disregarded-entity-as-corporation rule in effect since 2017.
Two conditions must both be true: a non-US person owns at least 25% of the US entity, and the entity had a reportable transaction. Forming and funding an LLC always moves money from the owner, so a zero-revenue, dormant foreign-owned LLC still typically must file. The requirement comes from final regulations T.D. 9796, which treat foreign-owned disregarded entities as corporations for this reporting purpose for tax years beginning on or after January 1, 2017.
Note that Form 5472 is not the same as a beneficial ownership (BOI) report. Per FinCEN's March 2025 interim final rule, US-formed entities — including foreign-owned US LLCs — are now exempt from BOI reporting; only foreign reporting companies file BOI. Form 5472 is a separate IRS requirement and is still due every year you have a reportable transaction.
For most foreign-owned SMLLCs the flat-fee specialist wins on cost and risk: a CPA runs $400-$800, DIY is $0 but exposes you to a $25,000 penalty, and a flat-fee service prepares the same CPA-quality package for a flat $299.
The three options produce the same IRS filing — the difference is price, accuracy support, and how much of the risk sits on you. A CPA brings credentials but charges more and often bills hourly for follow-up questions. DIY is cheapest up front but unforgiving. A flat-fee specialist sits in between: the work is CPA-prepared at a fixed price, so you get professional accuracy without the hourly meter.
| Factor | CPA | DIY |
|---|---|---|
| Cost | $400-$800 | $0 (penalty risk) |
| Accuracy | High | Depends on you |
| Penalty risk | Low if filed correctly | Highest |
| Hourly billing for questions | Often yes | Not applicable |
| E-file the SMLLC package | No — mail or fax | No — mail or fax |
Source: form5472.tax comparison of preparation options for foreign-owned SMLLCs. Verified June 2026.
See the flat-fee option in full on the pricing page or start directly on the apply page.
A flat-fee specialist prepares Form 5472 plus the pro forma Form 1120 for a single fixed $299 — no hourly billing — versus $400-$800 from a typical CPA and $547 at form5472.online. Annual compliance bundles cost far more.
The same filing sold three ways: a CPA prices it as specialty hourly work, an online competitor lists it at $547, and an annual compliance provider folds it into a yearly subscription. A dedicated flat-fee service does only this one thing, so it can hold the price at a flat $299 for CPA-prepared, reviewed, and filed work.
For the full breakdown against bundled providers, read our reviews of Doola and Firstbase.
For most foreign-owned SMLLCs, no. Doola charges $1,999/year and Firstbase $999-$1,499/year for annual compliance that often centers on the same Form 5472 a flat-fee specialist files for $299 — a difference of more than $1,000.
Subscription bundles can make sense if you genuinely need bookkeeping, a registered agent, and ongoing advisory in one place. But if your only annual obligation is Form 5472 plus the pro forma 1120, you are paying for services you do not use. A focused filing at a flat $299 covers the actual IRS requirement without the recurring overhead.
| Provider | Annual price | Core deliverable |
|---|---|---|
| Doola Total Compliance | $1,999/year | Form 5472 + pro forma 1120 + extras |
| Firstbase | $999-$1,499/year | Form 5472 + pro forma 1120 + extras |
| form5472.online | $547 | Form 5472 + pro forma 1120 |
| Flat-fee specialist | $299 | Form 5472 + pro forma 1120 |
Source: published provider pricing compared against the flat-fee filing. Verified June 2026.
Our deep-dive on the subscription model is in the Stripe Atlas review.
For a typical foreign-owned single-member LLC, the flat-fee specialist is the best value: it delivers the same CPA-prepared Form 5472 and pro forma 1120 for a flat $299, undercutting the $400-$800 CPA range while removing nearly all DIY penalty risk.
Choose a CPA if your tax situation is complicated, you have multiple entities, or you want one advisor for everything. Choose DIY only if you are confident reading the instructions and accept the $25,000 downside. For everyone in between — the large majority of foreign-owned SMLLC owners — a flat-fee specialist is the cleanest answer: professional accuracy, fixed price, and no hourly surprises.
We prepare and file the package, not represent you in penalty disputes — keep your mailing or fax proof either way. Ready to move? Start on the apply page.
Form 5472 and the pro forma 1120, prepared, reviewed, and filed for a flat $299. Or message us first — we answer every question.