Setting up a fake business to lower your taxes carries penalties that routinely exceed whatever the scheme was meant to save. On the civil side, the IRS can assess a fraud penalty equal to 75% of the underpaid tax, on top of the tax itself and compounding interest. On the criminal side, willful tax evasion is a felony punishable by up to $100,000 in fines and up to five years in federal prison. And because there is no statute of limitations on civil fraud assessments, the agency can reach back decades. Those are the penalties for setting up a fake business for tax purposes, and they stack rather than substitute.
When a Business Is Treated as Fake
Not every money-losing venture is a sham. The IRS separates genuine businesses from fabricated ones using two main frameworks.
Under Section 7701(o) of the Internal Revenue Code, a transaction has “economic substance” only if it meaningfully changes your economic position apart from tax benefits and you had a substantial non-tax purpose for entering into it.1Office of the Law Revision Counsel. 26 USC 7701 – Definitions An entity that exists only on paper to produce write-offs fails both prongs. The IRS disregards it and treats every deduction it generated as invalid.
A business that genuinely tried and failed is a different matter. The hobby-loss rules in Treasury Regulation § 1.183-2(b) use a nine-factor test to decide whether an activity has a real profit motive: whether you run it in a businesslike manner, keep accurate records, have relevant expertise, put in serious time, and can reasonably expect appreciation of assets you use.2Internal Revenue Service. Income and Expenses A real but struggling business is not a fake one. A string of losses with no attempt to change course starts to look less like a business and more like a deduction factory.
Civil Penalties You Would Actually Pay
Civil penalties are imposed administratively. The IRS does not need to win a criminal case to apply them, and they run on top of the tax you already owe.
Accuracy-Related Penalty: 20% or 40%
The baseline accuracy penalty for negligence or a substantial understatement of income is 20% of the underpayment. When the underpayment comes from a transaction that lacks economic substance and you did not disclose that on the return, the penalty doubles to 40%.3Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments If a fake business produced $50,000 in bogus deductions and your marginal rate was 24%, the underlying tax is $12,000 and the 40% penalty adds $4,800 before interest.
Civil Fraud Penalty: 75%
When the IRS concludes the underpayment was due to fraud rather than mere negligence, the penalty is 75% of the fraudulent portion. The IRS must initially show that some part of the underpayment was fraudulent. Once it does, the entire underpayment is presumed fraudulent unless you can prove otherwise by a preponderance of the evidence.4Office of the Law Revision Counsel. 26 USC 6663 – Imposition of Fraud Penalty The burden effectively flips to you.
Failure-to-File Penalty
Some operators of fake businesses stop filing altogether. If you did not file, the failure-to-file penalty runs 5% of the unpaid tax for each month or partial month the return is late, capped at 25%.5Internal Revenue Service. Failure to File Penalty It runs alongside the fraud penalty, not instead of it.
Interest
Interest accrues on all unpaid tax and penalties from the original due date of the return. As of early 2026, the IRS charges 7% on individual underpayments, compounded daily.6Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026 Because there is no civil statute of limitations when fraud is involved, that interest can compound for years before you know you are under investigation.
State tax authorities also receive federal audit results through information-sharing arrangements under Section 6103.7Internal Revenue Service. IRS Information Sharing Programs State civil fraud penalties vary but can add another 20% to 200% of the unpaid state tax on top of the federal bill.
Criminal Charges
Criminal prosecution is less common than civil enforcement, but when the Department of Justice brings a case, the odds are not favorable to the defendant. IRS Criminal Investigation obtained a 90% conviction rate in fiscal year 2024. The line between civil and criminal enforcement turns on willfulness: whether the government can prove you knew what you were doing was wrong and did it anyway.
Tax Evasion
Under 26 U.S.C. § 7201, willfully attempting to evade or defeat any tax is a felony punishable by a fine of up to $100,000 (up to $500,000 for a corporation) and up to five years in prison.8Office of the Law Revision Counsel. 26 USC 7201 – Attempt to Evade or Defeat Tax Creating a fake business to shelter income fits the statute directly.
Filing a False Return
Under 26 U.S.C. § 7206, filing a return you know to be materially false is a felony carrying a fine of up to $100,000 ($500,000 for a corporation) and up to three years in prison.9Office of the Law Revision Counsel. 26 US Code 7206 – Fraud and False Statements Signing a return with fabricated deductions from a sham entity is enough, even if the resulting tax understatement was modest.
Willful Failure to File
Willfully failing to file is a misdemeanor under 26 U.S.C. § 7203, carrying a fine of up to $25,000 and up to one year in prison.10Office of the Law Revision Counsel. 26 USC 7203 – Willful Failure to File Return, Supply Information, or Pay Tax It is a lighter charge, but prosecutors often stack it alongside felony counts.
Criminal fines are separate from civil penalties. A taxpayer convicted of evasion still owes the back taxes, the 75% civil fraud penalty, and accumulated interest in addition to anything the court imposes.
Why Time Does Not Protect You
The ordinary three-year window the IRS has to assess additional tax does not apply when fraud is involved. If you filed a false or fraudulent return with intent to evade tax, the IRS can assess tax and penalties at any time, with no expiration.11Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection A fake business you set up ten years ago can still produce a civil fraud assessment today.
Criminal prosecution has a longer leash than usual but does eventually expire. The government generally has six years from commission of the offense to bring charges for evasion, filing false returns, or willful failure to file.12Office of the Law Revision Counsel. 26 USC 6531 – Periods of Limitation on Criminal Prosecutions Pinning down exactly when the offense was “committed” can become its own legal fight.
How the IRS Finds Fake Businesses
Most people who set up fake businesses assume they will blend in. Automated systems do most of the initial screening and are better at it than most taxpayers realize.
Schedule C deductions are compared against industry averages for similar businesses. A one-person consulting firm claiming $80,000 in travel stands out immediately. Repeated losses with no visible attempt to change course trigger additional scrutiny under the hobby-loss rules.
Information matching is where schemes usually unravel. If you claim a $50,000 payment to a contractor, the IRS checks whether that contractor reported $50,000 in income. If no matching Form 1099-NEC exists, or the “contractor” did not file at all, the deduction gets flagged. The same cross-referencing applies to wages, rent, and nearly every dollar flowing between parties.
People around you can also report what they know. The IRS Whistleblower Program pays informants 15% to 30% of the proceeds collected in larger cases, which gives former spouses, business partners, and employees a direct financial reason to come forward.13Internal Revenue Service. Whistleblower Office
If You Have Already Done It
The IRS maintains a Voluntary Disclosure Practice (VDP) for taxpayers with criminal exposure from willful violations. Coming forward before the IRS contacts you does not guarantee immunity from prosecution, but it makes criminal charges significantly less likely.14Internal Revenue Service. IRS Criminal Investigation Voluntary Disclosure Practice
Timing is strict. A disclosure is only “timely” if it reaches the IRS before any civil examination begins, before a third-party tip arrives, and before the agency obtains information about your noncompliance through any enforcement action.14Internal Revenue Service. IRS Criminal Investigation Voluntary Disclosure Practice Once the IRS already knows, the door closes. You must cooperate fully, file or amend all returns for the disclosure period, and pay all taxes, interest, and applicable penalties. As of early 2026, the IRS has proposed a VDP framework applying a 20% accuracy-related penalty rather than the standard 75% civil fraud penalty for qualifying participants, which is a meaningful reduction for taxpayers who come forward on their own.
If a Tax Preparer Set It Up
A preparer who understates your tax liability due to unreasonable positions faces a penalty of $1,000 or 50% of the fee for preparing the return, whichever is greater. If the understatement was due to willful or reckless conduct, that penalty rises to $5,000 or 75% of the fee.15Internal Revenue Service. Tax Preparer Penalties Criminal charges under Section 7206 can also apply to anyone who aids in preparing a false return, not just the taxpayer who signs it.9Office of the Law Revision Counsel. 26 US Code 7206 – Fraud and False Statements
Working with a preparer who encouraged the scheme does not reduce your own liability. Both of you are independently on the hook, and the IRS routinely pursues both.