What Happens If You Never File Form 5472? The Real Timeline
Updated June 2026 · Reviewed by a Form 5472 specialist
Updated June 2026 · Reviewed by a Form 5472 specialist
The short answer
Key takeaways
The timeline runs in stages: a missed April 15 deadline, then 12 to 36 months until the IRS matches data and assesses $25,000, then a 90-day notice, then $25,000 every 30 days after that. The exposure never expires.
People imagine the IRS reacts the day after a deadline. It does not. For Form 5472, the real sequence is slower at the start and brutal at the end. The penalty is statutory and automatic on assessment, so by the time you hear from the IRS the dollar figure is already set. Understanding each stage is what makes the urgency obvious — the cheapest moment to act is always before the next stage begins.
| Stage | When it happens | What it costs |
|---|---|---|
| Missed deadline | April 15 (or Oct 15 with Form 7004) passes | $0 yet — but the clock has started |
| Data matching | 12–36 months later, via EIN / FATCA / 1099-K | $0 — IRS is building the case |
| Initial assessment | IRS mails a CP15 or penalty notice | $25,000 per form, per year |
| 90-day notice lapses | You do not file within 90 days | Compounding begins |
| Continued failure | Each 30-day period after the 90 days | +$25,000 per 30 days, no cap |
Source: IRC §6038A(d); §6501(c)(8); IRS Instructions for Form 5472. Verified June 2026.
If you have already passed the first stage, do not wait for the second. The missed Form 5472 guide explains exactly what to do before the IRS acts, and the penalty page covers the legal basis in full.
The base penalty is $25,000 per form, per year, under IRC §6038A(d)(1). It applies per entity and per missed year, with no maximum cap. Two LLCs that each skipped three years can face $150,000 before any compounding.
Form 5472 carries one of the harshest information-return penalties in the entire code, and it is the same flat amount whether your LLC earned millions or nothing at all. Because it is assessed per form and per year, the arithmetic of never filing gets ugly fast.
| Unfiled years | Penalty per year | Total exposure |
|---|---|---|
| 1 year | $25,000 | $25,000 |
| 2 years | $25,000 | $50,000 |
| 3 years | $25,000 | $75,000 |
| 5 years | $25,000 | $125,000 |
Source: IRC §6038A(d)(1). Pre-compounding totals. Verified June 2026.
Run your own numbers on the penalty calculator — it shows both the base assessment and what the figure becomes once compounding starts.
Once the IRS issues a notice and you fail to file within 90 days, an additional $25,000 accrues for each 30-day period the failure continues, under IRC §6038A(d)(2). A single year can pass $100,000within months.
The base $25,000 is only the opening figure. Section 6038A(d)(2) adds the continuation penalty: after the IRS mails its notice and 90 days pass without the form, every 30-day period that follows adds another $25,000 for that same year. There is still no cap on the total.
This is why a $25,000 problem ignored becomes a six-figure problem. Three additional 30-day periods after the 90-day window turn one unfiled year from $25,000 into $100,000. The math is mechanical and unforgiving, which is exactly why filing before the notice lands matters so much. For the mechanics in detail, see how the Form 5472 penalty works.
No. Under IRC §6501(c)(8), the statute of limitations on the entire return stays open indefinitelyuntil Form 5472 is filed. A year skipped in 2019 can still be assessed in 2026 or later — there is no expiration.
Most tax issues age out after three years. Form 5472 does not. Because the failure to file an information return keeps the limitations period open under section 6501(c)(8), the IRS can reach back any number of years to assess the penalty — and in many cases the open period applies to your whole return, not just the missing form.
Practically, this means time is never on your side. Waiting does not run out the clock; it only adds more years of $25,000 exposure. The only thing that closes the window is filing. If you have stacked up multiple years, missed Form 5472 for 2 years walks through the cleanup sequence step by step.
Detection comes from data the IRS already holds: EIN issuance, bank and payment-processor reporting (1099-K), and FATCA exchanges. Assessment commonly lands 12 to 36 months after the missed deadline, and increasingly sooner.
A foreign-owned US LLC leaves a long paper trail. The EIN application names a responsible party; US banks and Stripe, PayPal, and Mercury report activity; FATCA intergovernmental agreements share account data across borders. When that data shows a foreign-owned entity with no Form 5472 on file, it surfaces for review.
The gap between the missed April 15 deadline and an actual notice is often one to three years, but that gap is not safety — it is the data-matching stage, during which your exposure keeps accruing and the statute stays open. By the time a notice arrives, the penalty is already calculated. Read the full legal picture on the penalty page.
Almost certainly yes. The penalty is triggered by a reportable transaction, not by profit. Funding the LLC or paying its formation fee counts, so virtually every foreign-owned single-member LLC has had to file at least once.
The most common myth behind an unfiled return is “the LLC was dormant, so there was nothing to report.” That is wrong. A reportable transaction is any money or value moving between you and the LLC — including the capital you put in to open the bank account, formation and registered-agent fees you paid, or a loan to the entity. Because forming and funding an LLC always moves money, virtually every foreign-owned SMLLC has a reportable transaction in year one.
| What you assumed | The reality |
|---|---|
| No revenue, so no filing | Funding the LLC is a reportable transaction — you had to file |
| Paid formation fees myself | That payment is reportable — filing was still required |
| LLC was dormant all year | Even one capital contribution triggers the requirement |
| Multi-member LLC, so it's exempt | That files Form 1065 / K-1 instead — different form, still required |
Source: IRC §6038A; IRS Instructions for Form 5472. Verified June 2026.
Disregarded-entity treatment as a corporation for this reporting purpose has applied since 2017 under T.D. 9796, so even brand-new single-member LLCs are covered. Note that Form 5472 is separate from FinCEN BOI: under FinCEN’s March 2025 interim final rule, US-formed entities (including foreign-owned US LLCs) are exempt from BOI reporting, but that exemption does not touch your Form 5472 obligation.
File the delinquent Form 5472 plus a pro forma Form 1120 for each missed year, with a reasonable-cause statement, before the IRS assesses. A disregarded entity cannot e-file — mail to Austin, TX or fax 855-887-7737.
The cleanup is mechanical but exacting. For each unfiled year you prepare Form 5472 attached to a pro forma Form 1120, marked for the correct tax year, with a reasonable-cause statement explaining the failure. Filing before an assessment gives you the strongest abatement position, because the penalty becomes automatic the moment the IRS assesses it.
| 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. DE). Verified June 2026.
Because the statute stays open and the penalty compounds, every month of delay is more expensive. The fastest way to close the exposure is to file all delinquent years now. You can apply to have us file your Form 5472, or compare the cost on the pricing page — a flat $299 for prepared, reviewed, and filed returns, versus $547 at form5472.online and $1,999/year at doola.
File every delinquent year before the IRS assesses. Prepared, reviewed, and filed for a flat $299 — or message us first and we answer every question.