Every international penalty case I handle starts the same way. A client opens a CP15 or CP215 notice, sees a five figure penalty for a form they had never heard of until this year, and calls me somewhere between anger and panic. The penalty is usually $10,000 or $25,000. The form is usually Form 5471, Form 5472, or Form 3520. And in most of these cases the client reported every dollar of income and owed no additional tax at all. Here is what the notice does not tell you: these penalties are assessed automatically, by computer, with no human judgment applied to your facts. That cuts both ways. It means careful, honest taxpayers get hit with maximum penalties for paperwork failures. It also means a properly built abatement case is often the first time a human being at the IRS actually reads your story. When the story is told correctly and pushed through the right procedural channel, these penalties come off far more often than people expect.
Why International Information Return Penalties Are Different
Most IRS penalties are a percentage of unpaid tax. If you owed nothing, the penalty is nothing. International information return penalties break that logic completely. Forms 5471, 5472, 3520, 3520-A, 8938, and 8865 are information returns: they report ownership, transactions, and assets rather than income. The penalties attach to the failure to file the form itself, in fixed dollar amounts, regardless of whether any tax was underpaid. A foreign-owned LLC with zero revenue can owe a $25,000 penalty. A taxpayer who received a completely tax free inheritance from a parent abroad can owe a penalty of 25% of the amount received.
The second difference is procedural. Most of these penalties are assessed systemically, meaning IRS computers generate the assessment the moment a late form is processed, before anyone considers why it was late. There is no audit, no examiner conversation, and in most cases no deficiency notice that lets you contest the penalty in Tax Court before it is assessed. The burden shifts to you to get the penalty removed after the fact. That is the entire discipline of international tax penalty work: knowing which procedural door to walk through, in which order, with which facts in hand.
The Penalty Menu: What Each Form Costs
Form 5471: $10,000 Per Form, Per Year
U.S. shareholders and officers of foreign corporations who miss Form 5471 face an automatic $10,000 penalty per corporation per year. If the IRS issues a notice and the failure continues past 90 days, continuation penalties of $10,000 per 30 day period accrue, up to an additional $50,000 per year. A separate provision can reduce your foreign tax credits, and the statute of limitations on your entire income tax return generally stays open until the form is filed.
Form 5472: $25,000 Per Form, Per Year
Foreign-owned U.S. corporations and foreign-owned single member LLCs that skip Form 5472 face a $25,000 penalty per form per year, with the same continuation structure on top. This is the penalty I see most often against small foreign-owned businesses whose owners were never told that a disregarded entity with no income still has a filing obligation. Many of them find out three or four years in, which means the exposure arrives multiplied.
Form 3520: Up to 25% of the Amount Received
Miss the deadline for reporting a foreign gift or inheritance on Form 3520 and the penalty runs 5% per month, capped at 25% of the amount received. On a $400,000 inheritance that is a $100,000 penalty on money that was never taxable in the first place. Foreign trust reporting failures run higher still: up to 35% of contributions to or distributions from the trust, plus a separate penalty tied to Form 3520-A.
Form 8938 and the FBAR
Form 8938, the FATCA foreign asset statement, carries a $10,000 penalty with continuation penalties up to an additional $50,000. The FBAR is technically not a tax form at all; it is filed under the Bank Secrecy Act, its penalties are assessed under a separate regime, and willful violations can reach the greater of $100,000 or 50% of the account balance, per year. Americans living abroad routinely owe several of these filings at once, which means penalty exposure stacks across forms and across years.
How These Penalties Actually Get Assessed
The most common trigger is self-inflicted. A taxpayer or a new preparer discovers a missed form, attaches it to a late or amended return with no explanation, and mails it in. The service center processes the late form, and the computer assesses the penalty automatically. A CP15 notice (for individuals) or CP215 notice (for businesses) follows a few weeks later. Nobody weighed your facts, because the systemic assessment process has no step where facts get weighed.
The notice matters more than most people realize. It states a response window, and responding inside that window with a complete reasonable cause protest is what preserves your cleanest path to the IRS Independent Office of Appeals without paying the penalty first. Miss the window and your options narrow to collection-stage hearings or paying in full and suing for a refund. When a client brings me a fresh CP15, the response deadline goes on the calendar before anything else happens.
Reasonable Cause: The Standard That Decides Most Cases
Nearly every penalty discussed above can be abated if the failure was due to reasonable cause and not willful neglect. The standard asks whether you exercised ordinary business care and prudence and still failed to comply. That is a facts and circumstances test, and after years of building these cases I can tell you which facts actually move the needle:
- What you knew and could reasonably have known. Your background, your experience with U.S. taxes, whether you were new to the country, and whether anything in your situation would have alerted a reasonable person in your position to the filing requirement. A first-generation immigrant who inherited from a parent abroad sits very differently than a private equity executive with a family office.
- Whether you relied on a professional, and how. Reliance on a qualified advisor is the backbone of most successful cases, but the details control. Did your preparer know about the foreign company, the foreign accounts, the inheritance? Did they ever ask? A preparer who knew the facts and never mentioned the form is a strong fact for you. A preparer who was never told the facts is not.
- Your compliance history. Years of clean, timely filing supports the argument that this failure was an aberration rather than a pattern of neglect.
- What you did upon discovery. Moving promptly to fix the problem once you learned of it is powerful evidence of good faith. Sitting on it through two more filing seasons is the opposite.
One boundary matters here. The Supreme Court held in United States v. Boyle that relying on someone else to physically file on time is not reasonable cause; the filing deadline is yours to meet. But relying on professional advice about whether a filing requirement exists at all is a different question, and that distinction is where most international cases are won. The taxpayer who told their preparer about the foreign LLC and was told nothing needed to be filed has a real case. So does the taxpayer whose preparer used an intake questionnaire that never asked a single question about foreign assets, which is more common than the profession would like to admit.
First-Time Abatement Usually Does Not Work Here
First-time abatement is the administrative waiver that removes certain late filing and late payment penalties for taxpayers with a clean three year history. Clients ask about it constantly, because it sounds like exactly what they need. The answer is usually disappointing: FTA applies to a defined list of penalties, and the international information return penalties are generally not on that list. The practical consequence is that there is no easy administrative button to press for a Form 5471 or Form 3520 penalty. The case gets won on reasonable cause or on procedure, not on a waiver. Anyone who quotes you a quick fix based on first-time abatement for these penalties has not read the notice closely.
The Four Procedural Paths
1. Protest the Notice and Go to Appeals
If the penalty is already assessed and a CP15 or CP215 is in hand, the primary move is a written protest inside the notice's response window, laying out the full reasonable cause case with exhibits. If the initial reviewer denies it, the case can be pushed to the Independent Office of Appeals, where an officer evaluates hazards of litigation rather than just checking boxes. Appeals is where most of my abatement results actually happen. The protest that gets there needs to be built like a case file from day one, because it becomes the record everything else relies on.
2. The Delinquent Information Return Path
If the forms are still unfiled and the IRS has not contacted you, do not file them cold. Filing delinquent international information returns with a reasonable cause statement attached to each one, where all income was otherwise reported, is the established route for resolving the failure without penalties ever being assessed. The quality of the attached statement is the entire game: a strong one prevents the assessment, a weak one invites it, and silence guarantees it.
3. Streamlined Procedures for Multi-Year Failures
When the missed forms come with unreported foreign income across multiple years, the Streamlined Filing Compliance Procedures are usually the better framework: three years of amended returns, six years of FBARs, a non-willfulness certification, and the information return penalties are not asserted. For taxpayers who qualify under the foreign residence test, the miscellaneous offshore penalty is zero. For expats who never knew they had U.S. filing obligations at all, this path frequently resolves everything at no penalty cost.
4. Pay and Sue for a Refund
The last resort: pay the penalty, file a refund claim, and litigate in federal district court or the Court of Federal Claims when it is denied. Nobody wants this path, but its existence disciplines the earlier ones, and the government knows which reasonable cause cases it does not want a jury to hear. A small number of my matters have needed the credible threat; almost none have needed the courtroom.
What a Strong Reasonable Cause Statement Looks Like
The reasonable cause statement is not a form letter, and it is not an apology. It is a legal argument built on a documented chronology. The ones that succeed share a structure: a precise timeline of who knew what and when; the taxpayer's background and why the requirement was not reasonably knowable to them; the professional relationships, with names, engagement scope, and what was actually asked and answered; the moment of discovery; and the immediate corrective action that followed. Then the law, applied to those facts, with the standard quoted and met element by element.
Exhibits carry the day. The intake questionnaire that never asked about foreign accounts. The email where the client mentioned the foreign company and got no follow-up. The engagement letter limited to domestic preparation. I have had penalties abated in weeks on the strength of a single well-documented email chain, and I have watched sympathetic cases die because the statement was two generic paragraphs asking for mercy. The IRS reviewer reads hundreds of these; the ones that read like case files get treated like cases.
Mistakes That Sink Good Cases
- The quiet disclosure. Attaching late forms to an amended return with no statement, hoping nobody notices. The computer notices. This converts a winnable pre-assessment case into an uphill post-assessment fight.
- The template letter. Recycled boilerplate about acting in good faith, with no chronology, no names, and no exhibits. It reads as an admission that there is no real story to tell.
- Missing the response window. The CP15 deadline is short and the notice does not beg. Blowing it forfeits the cleanest route to Appeals.
- Saying too much. Statements drafted without understanding the willfulness standard can hand the government facts it would otherwise have to prove, especially where FBAR exposure sits alongside the tax forms.
- Fixing one year and ignoring the rest. Filing 2024 while leaving 2019 through 2023 open tells the IRS exactly where to look next. The compliance picture has to be resolved as a whole, under one strategy.
When to Get Help
If a CP15 or CP215 notice is sitting on your desk, the clock is already running, and what you mail back will define the case. If you have discovered missed forms and nothing has been assessed yet, you are in the strongest position you will ever be in, and the worst thing you can do is file something quickly and quietly. Either way, the analysis is the same one I run every week: which forms, which years, which procedural path, and what the reasonable cause record actually supports. Book a free consultation and bring the notice, the old returns, and every email you ever exchanged with a preparer about anything foreign. The case is usually already sitting in that pile. It just has to be built.