Entity and trust penalties scale with the value not reported. Form 5471 section 6038(a) failures start at $10,000 for each annual accounting period of each foreign corporation, then continue at $10,000 for each 30-day period past 90 days after IRS notice, capped at $50,000 additional, with criminal provisions behind the civil schedule. Form 8865 pairs the same $10,000 base and $10,000-per-period, $50,000-maximum additional continuation per partnership with a 10% cut to creditable foreign taxes plus 5% for each 3-month continuation period after 90 days past notice. Form 3520 starts at the greater of $10,000 or 35% of the property transferred to the trust or distributed from it, and 5% of the grantor-trust assets where the trust's own filings fail, with additional penalties where noncompliance continues more than 90 days after IRS notice and no penalties where the failure is due to reasonable cause and not willful neglect. The penalty follows the form that was owed, so a taxpayer missing two forms pays on both schedules.
Worked example
Cara fails to file a required Form 8865 for one partnership and ignores the notice for 30 days past the 90-day window. She owes the $10,000 base plus one $10,000 continuation period amount, $20,000 in all, alongside the credit reduction. Had she instead failed to report a $100,000 foreign-trust distribution on Form 3520, the starting measure would be 35% of the $100,000, or $35,000, since that exceeds $10,000.