Missed the Form 5472 Deadline? What to Do, Step by Step

TL;DR

If you missed the Form 5472 deadline, the order of operations is: file promptly (before any IRS notice), bring every missed year current at once, attach a reasonable-cause statement if the facts support one, and keep proof of everything. The escalating +$25,000-per-30-days continuation penalty only begins after IRS notice — which is why acting first matters.

Why acting before the IRS contacts you matters

The Form 5472 penalty has two stages: the initial $25,000 exposure, and a continuation penalty of another $25,000 per 30-day period that begins after the IRS issues a notice and 90 days pass. Filing before any notice exists caps the problem at stage one — and demonstrates the “ordinary business care” that relief arguments are built on.

Step by step for a late filing

1. Reconstruct the missed year(s). Bank statements, formation documents, and capital movements — the same inputs as a normal 5472.
2. Prepare one complete package per year — Form 5472 attached to its own pro forma 1120, each year separate.
3. Attach a reasonable-cause statement if the facts support one — a concise, factual explanation of why the filing was missed and what you did once you learned of the duty. See how reasonable cause works.
4. Mail or fax to the IRS (Ogden, UT) — same channel as a timely filing — and keep transmission proof.
5. Fix the system going forward: calendar April 15, and file Form 7004 by that date in any year you need more time — extensions cannot be granted retroactively.

Late filing: what it is NOT

• It is not hopeless. Penalties are exposure, not an automatic certainty; complete, prompt filings with documented cause are in the strongest position.
• It is not something to “wait out.” There is no statute-of-limitations comfort on an unfiled information return — the clock you care about starts with an IRS notice, and you want to file before one exists.
• It is not fixed by filing only the latest year. A current-year filing sitting on top of unfiled prior years leaves the exposure in place.

Multi-year cleanups

Sellers often discover the 5472 duty two or three years in. The cleanup is the same recipe repeated per year, filed together: each year’s transactions, each year’s package, one consistent reasonable-cause narrative. Because a delinquent filing invites more scrutiny than a timely one, this is the single situation where professional preparation earns its fee most clearly — our Form 5472 service prices prior years as fixed line items.

This article is general information, not tax or legal advice. Penalty assessment and relief are fact-specific — confirm how the rules apply to your situation before acting.