Nobody is ever convicted of willfulness by confession. There’s no form where you check a box marked “I intended to hide this.” Willfulness is established the way most states of mind are established in law: by inference from a pattern of facts. The IRS assembles the pattern; a court decides what it adds up to.
That has a practical consequence most people miss: your willfulness case — for or against you — is being written right now, in your filings, your paperwork, and your conversations with your preparer, years before anyone asks a question. Understanding what goes into the pattern is how you avoid accidentally writing the wrong one.
The baseline: what the IRS has to show
The burden sits with the IRS. To assess a willful penalty, it has to establish that the failure was knowing, reckless, or willfully blind — and as covered in Willful vs. Non-Willful: The Two-Tier System Behind Every FBAR Penalty, recklessness has done most of the work in recent cases. Should have known and stayed incurious can be enough; the Reyes ruling said so in plain terms. Two Court Rulings Just Pulled FBAR Penalties in Opposite Directions covers it.
So the evidence question isn’t “did they catch you scheming?” It’s “what does the record suggest about what you knew, or chose not to know?”
The patterns that show up in the case law
A few recurring facts carry most of the weight when the IRS argues willfulness. None of them is conclusive alone; together they tell a story.
The false “no” on your own tax return. Schedule B asks directly whether you have foreign financial accounts. A “no” on a return you signed — under penalty of perjury — when the true answer was yes is the single most cited piece of willfulness evidence, because it’s your own signed statement. Courts have repeatedly accepted it as supporting willfulness, with one important limit: a wrong checkbox by itself has not been treated as automatically willful, particularly where tax software filled it in by default and the taxpayer never engaged with the question. The checkbox opens the argument; it doesn’t end it. Checking “No” on the Foreign-Accounts Question — How One Checkbox Becomes Evidence Against You is dedicated to this.
Concealment-shaped logistics. Hold-mail arrangements with foreign banks, accounts spread across multiple institutions or jurisdictions without an ordinary-life explanation, moving balances after compliance questions arise. These are facts about behavior, and behavior that looks like avoiding a paper trail reads as knowledge of what the paper trail would show.
What you didn’t tell your preparer. If your preparer asked about foreign accounts and the record shows you didn’t disclose them, that’s evidence you understood the question’s significance. The mirror image matters too: a preparer who never asked supports your side — but as The US-Only Tax Preparer Problem: When Good Help Isn’t the Right Help explains, the responsibility for the return stayed with you either way.
The shape of your own sophistication. Courts weigh who you are. A taxpayer who runs businesses, signs international contracts, or manages substantial investments has a harder time arguing they couldn’t be expected to know. Education, profession, and the scale of the money all feed the reasonableness inference.
What you did after learning. Prompt correction supports good faith. Continuing to file as before — or quietly fixing future years while leaving past years buried — supports the opposite. The record after the moment of knowledge is often the most legible part of the whole file.
Read the list again, from the other side
Here’s the constructive use of that list: every pattern has an innocent mirror, and the mirror is buildable in advance. Answer the foreign-account questions on your returns accurately. Keep a simple annual inventory of your accounts — including the dormant and joint ones, which is where patterns accidentally form (The Accounts You Forgot Still Count: Aggregation, Dormant Accounts, and Your Non-US Spouse). Tell your preparer about your foreign financial life in writing, even if they don’t ask. And if you discover a gap, act on it promptly — through the organized routes, not by quietly patching future years. The Three Ways Back: Catch-Up Paths for Missed Foreign Account Filings, Compared explains why the quiet patch is specifically the wrong move.
None of that is about gaming an examination. It’s the same behavior an honestly compliant person exhibits — which is precisely why it’s persuasive.
One closing caution: if you’re reading this because the patterns above feel uncomfortably familiar, resist the urge to self-assess your way to an answer. Willfulness is a legal conclusion drawn from your complete record, and it’s exactly the question a cross-border professional — sometimes with counsel involved — should evaluate before you file anything else.
This article is general educational information, not tax or legal advice. Willfulness determinations are fact-intensive legal judgments. Before acting on anything here, speak with a qualified cross-border tax professional about your specific circumstances.