Form 5472 Penalty Calculator: How Much Do You Owe the IRS?

The penalty math is brutally simple, which is exactly why it is so dangerous. The IRS does not scale the Form 5472 penalty to the size of your company, your revenue, or the dollar value of the transactions you failed to report. It is a flat $25,000 for each Form 5472 that is not filed, filed late, or filed substantially incomplete. A dormant LLC that earned $0 owes the same $25,000 as a company that moved $2 million.

The penalty multiplies in two directions. First, by year: every separate tax year you missed is its own $25,000. Second, by form: if your LLC had transactions with more than one related foreign party in a single year, you owe a separate Form 5472 — and a separate $25,000 — for each. A founder with two foreign related parties over three years could face $150,000 in base penalties alone.

Many information-return penalties are capped — Form 5471, for example, tops out in practice through its own structure, and some 1099 penalties have annual maximums. Form 5472 has none. The statute, IRC section 6038A(d), simply assesses $25,000 per failure and then layers continuation penalties on top with no ceiling. This is why a single ignored letter can spiral.

The 90-day notice and the $25,000-per-30-days continuation

Here is how it compounds within one year. The IRS assesses the initial $25,000. If you fail to file within 90 days of the IRS mailing a formal notice of the failure, an additional $25,000 applies for each 30-day period (or fraction of one) that the failure continues.

A single unfiled year, left unaddressed for four months after the notice, can exceed $100,000. Multiply that across several years and the exposure becomes genuinely ruinous — for a company that may never have earned a dollar.

Normally the IRS has three years to assess tax after a return is filed. But under IRC section 6501(c)(8), when a required information return such as Form 5472 is missing, the assessment clock for the entire return does not begin to run until that information is supplied. For a disregarded entity that never filed, the period stays open indefinitely.

The practical consequence is severe: a year you ignored in 2019 is still fully assessable in 2026and beyond. There is no point at which an unfiled Form 5472 becomes “safe” by age. The only way to start the clock and cap your exposure is to file the missing form. The sooner you file, the sooner the open-ended risk ends.

The penalty is a failure-to-filepenalty, which means the failure is what is being penalized — not the underlying transactions. The moment the IRS receives a complete Form 5472 attached to a pro forma Form 1120, the “failure” ends. The continuation penalties stop accruing, and the assessment statute finally begins to run.

You cannot e-file — and that matters for the penalty

A foreign-owned single-member LLC cannot e-file Form 5472. The only accepted methods are mail to Internal Revenue Service, P.O. Box 149342, Austin, TX 78714-9342, or fax to 855-887-7737. Because timely filing is your defense, keep dated proof — a certified-mail receipt or a fax confirmation establishes the filing date if the IRS later disputes it.

File the form, or file Form 7004 by April 15 to extend to October 15. Missing the date without an extension is what exposes you to the $25,000. Most foreign-owned LLCs must file at all because virtually every foreign-owned SMLLC has at least one reportable transaction — even funding the LLC counts — so the safe assumption is that you must file.

Penalty abatement exists, but it is a request, not a right. Under the reasonable-cause standard, you must show that you exercised ordinary business care and prudence yet still could not file on time — a high bar that “I didn’t know about the form” rarely meets on its own. First-time abatement may apply if you have a clean compliance history, but it is discretionary.

We describe abatement here only so you understand the landscape. We do not represent clients in penalty-abatement proceedings. The honest conclusion is that prevention beats cure: a $299filing avoids a $25,000 penalty with certainty, while abatement is a gamble decided by the IRS after the damage is done. If you have unfiled years, the priority is to file now and stop the clock.

The arithmetic is one-sided. form5472.tax prepares Form 5472 and the pro forma Form 1120, has a specialist review it, and files it correctly for a flat $299 — saving $248 versus form5472.online and up to $1,700 versus doola, while eliminating a $25,000 penalty per year. DIY is free, but the same $25,000 applies to an honest mistake or a missed deadline.

A common assumption is that the IRS sizes the Form 5472 penalty to how much money moved through the LLC, the way an underpayment penalty scales to unpaid tax. It does not. IRC section 6038A(d) sets a fixed dollar figure: $25,000 for each Form 5472 that is late, incomplete, or never filed. The number does not move with your revenue, the dollar value of the reportable transaction, or whether the LLC turned a profit. A company that contributed $1,000 of capital and a company that wired $5 million both owe the identical $25,000 if they fail to file.

That makes the calculation a simple multiplication, not a formula. Count the number of separate Form 5472 filings you owe — one per related foreign party, per tax year — and multiply by $25,000. The pro forma Form 1120 that carries the 5472 is not separately penalized under 6038A; the $25,000 attaches to the missing information return itself. T.D. 9796 brought foreign-owned single-member LLCs into this regime for tax years beginning on or after January 1, 2017, so every year from 2017 onward is in scope.

Because the figure is flat, there is no “small” version of this penalty. The cheapest way to make the calculation come out to $0 is to file each required Form 5472 on time — by April 15, or October 15 with a timely Form 7004 extension.

Form 5472 is an information return, not a tax return. It exists to report dealings between the LLC and its foreign owner or other related parties, regardless of whether those dealings produced any taxable income. The filing obligation under IRC section 6038A turns on whether the LLC had a reportable transaction with a related party during the year — not on profit, loss, or revenue. An LLC that earned $0 but had even one reportable transaction must still file.

What counts as a reportable transaction for a zero-revenue LLC

The definition is broad enough that almost any activity qualifies. Money or value moving in either direction between the LLC and a related foreign party is reportable, including the most basic startup events:

This is why the safe assumption is that you must file: virtually every foreign-owned SMLLC has at least one reportable transaction— even funding the LLC counts — in its very first year. A brand-new entity that has done nothing but open a bank account has almost certainly created a reportable capital contribution. Treating “we made no money” as a reason not to file is the exact mistake that exposes a dormant LLC to the full $25,000.

The initial $25,000 is only the floor. IRC section 6038A(d)(2) adds a continuation penalty: once the IRS sends a formal notice of the failure to file, you have 90 days to comply. If the form is still not filed after that 90-day window, the IRS adds another $25,000 for every 30-day period — or any part of one — that the failure continues. There is no ceiling on how many 30-day blocks can stack.

Read the escalation carefully: a single tax year that started as a $25,000 problem becomes a $175,000 problem six months after the notice — and that is for one form. If you owe multiple years, each one escalates on its own clock. The continuation penalty is also what makes ignoring IRS correspondence so dangerous: the letter that looks easy to set aside is the event that starts the 90-day countdown to compounding.

The continuation penalty only runs while the form remains unfiled. Filing the Form 5472 with the pro forma Form 1120 ends the failure and stops new 30-day penalties from accruing. Because a foreign-owned SMLLC cannot e-file, you stop the clock by mailing to P.O. Box 149342, Austin, TX 78714-9342, or faxing 855-887-7737, and keeping dated proof of the filing date.

For an ordinary tax return, the IRS generally has three years from the filing date to assess additional tax. That protection does not exist when a required information return like Form 5472 is missing. IRC section 6501(c)(8) suspends the assessment period for the entire return until the taxpayer furnishes the required information. For a foreign-owned single-member LLC that never filed, the clock has never started — so it can never run out.

The practical effect is that age gives you no safety. Because the disregarded-entity filing requirement took effect under T.D. 9796 for tax years beginning on or after January 1, 2017, every year from 2017 forward that you failed to file remains fully assessable today. A 2017 omission is just as open in 2026 as a 2025 omission. There is no point at which an unfiled year “ages out” and becomes safe.

The only way to start the clock and cap your exposure is to file the missing form. Filing the delinquent Form 5472 and pro forma Form 1120 furnishes the information section 6501(c)(8) is waiting for, which finally begins the assessment period and closes the open-ended risk for that year.

The decision between fixing and ignoring is one-sided once the numbers are on the table. Ignoring an unfiled year does not make it go away — section 6501(c)(8) keeps it open, and a future IRS notice starts the $25,000-per-30-days continuation penalty. Catch-up filing does the opposite: it furnishes the information, ends the failure, and freezes that year’s exposure. The cost of fixing is the flat filing fee; the cost of ignoring is the $25,000 base penalty per form, with no cap.

Compared to alternatives, catch-up filing is also the cheapest route to compliance: form5472.online charges $547 for a single filing, doola bundles compliance at $1,999/year, and Firstbase runs $999–$1,499/year. We prepare and file each delinquent Form 5472 with its pro forma Form 1120 for a flat $299per year. The “ignore it” column has no upside — the penalty does not shrink with time, and the year cannot expire on its own.

We prepare and file the delinquent returns; we do not represent clients in penalty-abatement proceedings. The reliable move is to stop the bleeding: file the missing years now so each open year closes and the continuation clock can never start.

A common and expensive misunderstanding is that the $25,000 penalty is capped at one charge per year. It is not. The penalty attaches to each Form 5472, and a reporting entity files a separate Form 5472 for everyrelated foreign party it transacted with. An LLC owned by one foreign person, with no other related parties, files one form — so the calculator’s one-form-per-year default fits the typical single-owner LLC.

But the math changes fast when there are multiple related parties. Suppose your US LLC paid a foreign company you also own, borrowed from a foreign relative, and took a capital contribution from a foreign co-owner. That is three related parties, three Forms 5472, and $75,000 of exposure for a single unfiled year — before any continuation penalty. Over two unfiled years the base exposure reaches $150,000.

If your LLC has more than one related foreign party, count the forms before you read the calculator total, then multiply. The safest path is the same either way: file every required Form 5472, each attached to the one pro forma Form 1120, for a flat $299 per year.