The number is $10,000. That is the base penalty for a single missing or incomplete Form 5471, and it applies per foreign corporation, per annual accounting period, before the IRS touches your foreign tax credits or the statute of limitations on the return. Total monetary exposure on one delinquent form reaches $60,000. For the filing categories, schedules, and mechanics of the form itself, see our Form 5471 filing guide.
What Is the Base Penalty for Failing to File Form 5471?
The base penalty under IRC Section 6038(b)(1) is $10,000, and it applies per Form 5471, per foreign corporation, per annual accounting period, for failing to furnish the information the form requires. A U.S. person who controls three foreign corporations and misses the filing for all three in the same year is looking at $30,000 in base penalties before anything else is added.
The penalty is not limited to a complete no-show. It also reaches a Form 5471 that was filed but is substantially incomplete, because a missing required schedule, an inaccurate ownership statement, or omitted financial data can be treated the same as never filing at all. Whether a person is a U.S. shareholder in the first place turns on the CFC attribution rules, and the penalty attaches regardless of which filer category triggered the requirement.
How Does the Continuation Penalty Work?
The continuation penalty under IRC Section 6038(b)(2) adds another $10,000 for each 30-day period, or fraction of one, beginning 90 days after the IRS mails notice of the failure, and it is capped at $50,000 for each foreign corporation and accounting period. That cap puts the base penalty plus the full continuation penalty at $60,000 for a single delinquent Form 5471, still before the foreign tax credit sanction is applied.
How the 90-Day Clock Actually Runs
- The IRS mails a written notice of the failure, and the clock begins on that date.
- Ninety days follow. That window is the taxpayer's chance to correct the failure.
- Uncured after 90 days, the continuation penalty accrues at $10,000 per 30-day period or fraction.
- Accrual stops at $50,000, for a combined maximum of $60,000 with the base penalty.
- File the complete form inside the 90 days & the continuation penalty never starts. Reasonable cause under Section 6038(c)(4)(B) can also defeat it after the fact, because it moves the prescribed time and the start of the clock to the last day reasonable cause existed.
Because the 90-day window opens only after a mailed notice, a taxpayer who self-discovers a missed Form 5471 and files it voluntarily before the IRS ever sends notice avoids the continuation penalty by definition, even though the $10,000 base penalty can still apply.
What Is the Foreign Tax Credit Reduction Penalty?
IRC Section 6038(c) imposes a separate sanction that reduces the taxpayer's foreign tax credits by 10 percent, rising by another 5 percent for each 3-month period the failure continues after the 90-day period following IRS notice. Section 6038(c)(3) then reduces that credit reduction by any penalty already imposed under Section 6038(b) for the same annual accounting period, and Section 6038(c)(2) caps it at the greater of $10,000 or the income of the foreign business entity for that period. A taxpayer already hit with the $10,000 base penalty on a small foreign corporation often sees no credit reduction at all. The sanction bites where the entity's income is large enough that the cap exceeds the penalty already assessed.
The dollar penalty can reach $60,000 per delinquent form. The credit reduction sits on top of that only to the extent it survives the Section 6038(c)(2) cap and the Section 6038(c)(3) offset, so run both before quoting anyone a number. Anyone claiming foreign tax credits alongside a controlled foreign corporation filing should read the credit mechanics in our foreign tax credit guide.
What Qualifies as Reasonable Cause for Form 5471 Penalties?
Reasonable cause relief is available where the failure to furnish required information is due to reasonable cause and not willful neglect, but the taxpayer must affirmatively establish it, and a generic statement is routinely rejected. Reasonable cause does not waive the Section 6038(b) penalty by its own terms. Under IRC Section 6038(c)(4)(B), it moves the prescribed time for furnishing the information, and with it the start of the 90-day clock, to the last day on which reasonable cause existed. Treas. Reg. 1.6038-2(k)(3) sets the mechanics, requiring a written statement signed under penalties of perjury.
Why the First Statement Decides the Outcome
CautionA statement like "my accountant didn't tell me" or "I didn't know I had to file" gets rejected on its face. The standard asks for specific facts tied to a specific period, and no IRS reviewer is obliged to go looking for those facts on your behalf.
The statement you file first becomes the permanent record. Every later reviewer, every appeals officer, and every court works from that document and the facts you chose to put in it. Rebuilding the record after a penalty notice has already issued costs more than building it correctly the first time, and by then the assessment is already sitting on your account.
Where Does the Assessment-Authority Fight Stand as of September 2026?
The Tax Court initially held in Farhy v. Commissioner, 160 T.C. No. 6 (2023), rev'd, 100 F.4th 223 (D.C. Cir. 2024), that the IRS lacked authority to administratively assess Section 6038(b) penalties, and the D.C. Circuit reversed that holding on May 3, 2024. On February 27, 2026, the Second Circuit reached the same conclusion in Safdieh v. Commissioner, 169 F.4th 102 (2d Cir. 2026).
As of September 2026, two federal appellate courts, the D.C. Circuit and the Second Circuit, have held the IRS may assess these penalties directly, without a separate collection suit. The Tax Court has continued to hold the opposite in cases arising elsewhere, so where a case would be appealable changes the answer. Anyone facing a Section 6038(b) assessment should have venue analyzed before deciding whether to pay, petition, or ask for abatement.
Why Does the Statute of Limitations Matter More Than the Penalty?
Under IRC Section 6501(c)(8), a failure to furnish required Form 5471 information keeps the assessment statute of limitations open on the return the information relates to, which the IRS applies to the whole return and not only the foreign items, until three years after the required information is actually furnished. If the failure is due to reasonable cause, the extension narrows to only the items related to the failure.
A taxpayer who assumes the statute closed three years after filing can find the IRS examining unrelated items on that same return years later, solely because one Form 5471 was never furnished. Establishing reasonable cause can eliminate the monetary penalty, and it narrows the statute extension down to the items tied to the missed form.
What If You Have Unfiled Forms 5471 From Prior Years?
The right path depends on whether there is unreported income behind the missed filing. Taxpayers whose income was fully reported but who missed the international information return can use the Delinquent International Information Return Submission Procedures, attaching a reasonable cause statement to each late Form 5471. The IRS says on that page that penalties may be assessed during processing without considering the attached statement, so expect a CP15 or a systemic notice on a late 5471 and plan to fight the penalty after assessment. Where there is unreported income and the conduct was non-willful, the Streamlined Domestic Offshore Procedures or the Streamlined Foreign Offshore Procedures apply, depending on which residency test the taxpayer meets.
Choosing the wrong track is its own risk. The IRS states no income condition on the delinquent procedures, so unreported income doesn't close that door by itself. In practice unreported income usually means the streamlined track is the right one, because streamlined fixes the income side and the missed information return in the same submission. A reasonable cause statement gets evaluated against the full facts either way, unreported income included. A CFC filer working through this decision should first settle which inclusion regime applies, because subpart F and GILTI reach different income and the unreported items usually drive the choice between the two tracks.
The reasonable cause record has to be built around what actually happened in those years, whether the Form 5471 is delinquent, incomplete, or already penalized. Contact TS CPA for a free consultation. We respond within the same day.