How to Read an IRS Notice to Your Foreign-Owned LLC

TL;DR

Every IRS notice tells you five things in the top-right corner: the notice number (CP215, CP504…), the tax period, the form involved, the amount, and your response deadline. For a foreign-owned LLC the highest-stakes letter is CP215 — the civil-penalty notice that typically carries the $25,000 Form 5472 penalty. It means the penalty has already been charged. The 90-day continuation clock runs from a notice that a Form 5472 is missing; whichever letter you hold, if any Form 5472 is still unfiled, file it now. Read the number first, then the deadline, then respond in writing.

Where do I find what the notice means?

Start at the top-right corner: the notice or letter number identifies the message before you read a word of the body. Then find the tax period it covers and the “respond by” date. The body explains what the IRS believes happened; the number tells you which playbook you are in.

Numbers outside this table exist by the hundreds — the reading method is the same: number, period, amount, deadline.

Why is CP215 the one that matters most?

Because it carries the money: $25,000 for each Form 5472, already charged. The response order is mechanical: make sure every missing return is filed, then ask for the penalty to be removed. A separate clock applies only to a Form 5472 that is still unfiled: once the IRS mails notice that it is missing, a continuation penalty of $25,000 per 30-day period can begin after 90 days, and filing stops it; the late-filing playbook covers the sequence, and reasonable-cause relief covers the written request that follows — relief is possible but never guaranteed.

What happens if I miss important IRS notices from my registered agent?

The deadlines run anyway, because they start when the IRS sends the notice, not when you read it. For a Form 5472 that is still missing, the statute applies the continuation penalty when the failure “continues for more than 90 days after the day on which the Secretary mails notice of such failure to the reporting corporation”: $25,000 for each further 30-day period for tax years beginning after 2017 (26 U.S.C. §6038A(d)(2)).

Whether the notice reaches your registered agent at all depends on the address the IRS has. It writes to your “last known address,” which is the address on your most recently processed return unless you have given it “clear and concise notification of a different address” (Treas. Reg. §301.6212-2(a)). Three fixes, in order:

1. Check which address the IRS has, and if it is not one you read, change it with Form 8822-B.
2. Name a designee on Form 8821 to receive copies of IRS notices for the tax matters and years listed on the form; the box under the designee’s name has to be checked for that (Instructions for Form 8821).
3. If a notice may already have gone unread, file anything still missing now; filing is what stops the continuation clock.

What if the notice went to an old address?

It still counts. Notices are effective when sent to your address of record, and the escalation clock runs whether or not you saw the letter. This is the single strongest argument for keeping your IRS mailing address current with Form 8822-B — a $39–$70 filing that removes the worst failure mode a foreign owner has: penalties compounding in a mailbox you no longer control.

The response checklist

1. Identify the notice number, tax period, and deadline — photograph or scan the full letter.
2. Verify it is real: the IRS initiates contact by mail, not by email, SMS, or chat apps. Unexpected payment links are a scam signature.
3. Stop the bleeding — if the notice concerns an unfiled return, file it now; disputes come second.
4. Respond in writing by the stated date, keeping proof of mailing.
5. Fix the root cause — update addresses, calendar the recurring deadline, and bring any other unfiled years current before they generate their own notices.

In our practice, the pattern behind almost every escalated penalty is the same: the notice was real, the deadline was real, and nobody was reading the mailbox. The cure is administrative, not heroic.

Official references: IRS — Understanding your IRS notice or letter (look up any notice number) · IRS — Penalty relief.

This article is general information, not tax or legal advice. Notice handling depends on your facts — get specific guidance before responding to an assessed penalty.