Setting up a fake business for tax purposes carries penalties that routinely exceed whatever tax the scheme was meant to avoid. On the civil side, the IRS can assess a fraud penalty of 75% of the underpaid tax on top of the tax itself, plus interest that compounds daily. On the criminal side, 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 IRS can come after a sham entity you created a decade ago as easily as one you created last year.
What Counts as a Fake Business
A business that loses money is not automatically a fake business. The IRS uses two frameworks to separate a real venture that failed from an entity that never had a purpose beyond generating deductions.
Under Section 7701(o) of the Internal Revenue Code, a transaction has “economic substance” only if it meaningfully changes your economic position apart from any tax benefit 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 to produce write-offs fails both tests. The IRS will disregard it entirely and treat every deduction it generated as invalid.
Separately, the hobby loss rules apply a nine-factor test from Treasury Regulation § 1.183-2(b) to activities that keep losing money. Factors include whether you run the activity in a businesslike manner, keep accurate records, have relevant expertise, and put in serious time and effort.2Internal Revenue Service. Income and Expenses No single factor controls. A venture with sustained losses and no visible effort to change course looks less like a business and more like a deduction generator.
Most sham arrangements are not sophisticated. A common pattern is a sole proprietorship on Schedule C that reclassifies personal spending as business costs, sometimes paired with fabricated invoices, inflated vehicle deductions on Form 4562, or wages paid to family members who perform no actual work.3Internal Revenue Service. About Form 4562, Depreciation and Amortization (Including Information on Listed Property)
Civil Penalties You’ll Owe
Civil penalties are administrative. The IRS imposes them without needing a criminal conviction, and they stack on top of each other and on top of the underlying tax.
Accuracy-Related Penalty: 20% or 40%
The baseline penalty for negligence or a substantial understatement of income is 20% of the underpayment. When the underpayment stems from a transaction lacking economic substance and you did not disclose that on your return, the penalty doubles to 40%.4Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
Civil Fraud Penalty: 75%
If the IRS determines the underpayment was due to fraud rather than negligence, the penalty rises to 75% of the fraudulent portion. The IRS must first establish that some part of the underpayment was fraudulent. Once it does, the entire underpayment is presumed fraudulent unless you prove otherwise by a preponderance of evidence.5Office of the Law Revision Counsel. 26 USC 6663 – Imposition of Fraud Penalty The burden flips to you once the IRS makes its threshold showing.
Failure-to-File Penalty
If you did not file a return at all, the penalty is 5% of the unpaid tax for each month or partial month the return is late, capped at 25%.6Internal Revenue Service. Failure to File Penalty It runs alongside fraud penalties, not in place of them.
Frivolous Return Penalty
A return containing information obviously designed to impede tax administration, or based on a position the IRS has identified as frivolous, triggers a flat $5,000 penalty per submission.7Office of the Law Revision Counsel. 26 USC 6702 – Frivolous Tax Submissions You can avoid it by withdrawing the submission within 30 days of IRS notice, but by then you have attracted the attention you were trying to avoid.
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.8Internal Revenue Service. Interest Rates Remain the Same for the First Quarter of 2026 Because civil fraud assessments have no expiration, interest can compound for years before you learn you are under investigation.
Criminal Charges the DOJ Can Bring
Criminal prosecution is less common than civil enforcement, but IRS Criminal Investigation obtained a 90% conviction rate in fiscal year 2024. The pivot from civil to criminal is willfulness: whether the government can prove you knew what you were doing was wrong and did it anyway.
Tax evasion is the most serious charge. 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.9Office of the Law Revision Counsel. 26 USC 7201 – Attempt to Evade or Defeat Tax Creating a sham entity to shelter income falls squarely within it.
Filing a false return under 26 U.S.C. § 7206 is a felony carrying a fine of up to $100,000 ($500,000 for a corporation) and up to three years in prison.10Office of the Law Revision Counsel. 26 US Code 7206 – Fraud and False Statements The charge applies to anyone who signs a return containing fabricated deductions, regardless of the size of the underpayment.
Willfully failing to file at all is a misdemeanor under 26 U.S.C. § 7203, carrying a fine of up to $25,000 and up to one year in prison.11Office of the Law Revision Counsel. 26 USC 7203 – Willful Failure to File Return, Supply Information, or Pay Tax Prosecutors often stack it alongside other counts.
Criminal fines are separate from civil penalties. A conviction does not erase what you owe. You still owe the back taxes, the 75% civil fraud penalty, and accrued interest on top of anything the court imposes.
How the IRS Finds Out
Automated systems do most of the initial screening. The primary method compares deductions on your Schedule C against industry averages for similar businesses. A one-person consulting firm claiming $80,000 in travel expenses stands out immediately. Sustained losses year after year trigger additional scrutiny under the hobby loss rules.
Information matching is where schemes most often 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 if the “contractor” filed no return at all, the deduction gets flagged. The same cross-referencing applies to wages, rent payments, and effectively every dollar flowing between parties.
The IRS also shares information with state tax authorities under Section 6103 of the Internal Revenue Code.12Internal Revenue Service. IRS Information Sharing Programs Federal findings flow to state agencies, which may pursue their own penalties. State civil fraud penalties vary widely but can add another 20% to 200% of the unpaid state tax on top of what the IRS assesses.
Third parties supply a large share of leads. An ex-spouse, a former business partner, or a suspicious neighbor can file IRS Form 3949-A to report suspected fraud confidentially.13Internal Revenue Service. Information Referral Process for Form 3949-A For larger cases, the IRS Whistleblower Program pays informants 15% to 30% of the total proceeds collected.14Internal Revenue Service. Whistleblower Office The people who know about your fake business have a financial reason to talk.
There’s No Time Limit on Getting Caught
The normal three-year assessment window does not apply when fraud is involved. For civil assessments, there is no time limit at all. If you filed a false or fraudulent return with intent to evade tax, the IRS can assess additional tax and penalties at any point in the future.15Office of the Law Revision Counsel. 26 USC 6501 – Limitations on Assessment and Collection
Criminal prosecution does eventually expire. The government generally has six years from the commission of the offense to bring charges for tax evasion, filing a false return, or willful failure to file.16Office of the Law Revision Counsel. 26 USC 6531 – Periods of Limitation on Criminal Prosecutions Pinning down the exact start of that clock can itself become a legal fight.
If You’ve Already Done This: Voluntary Disclosure
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, but it makes criminal charges significantly less likely.17Internal Revenue Service. IRS Criminal Investigation Voluntary Disclosure Practice
Timing controls eligibility. A disclosure is only “timely” if it arrives before the IRS has started a civil examination, received a third-party tip, or otherwise obtained information about your noncompliance through enforcement action. 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 reducing the VDP penalty framework to a 20% accuracy-related penalty instead of the standard 75% civil fraud penalty for qualifying participants, a meaningful reduction for taxpayers who come forward on their own.
Your Preparer Doesn’t Absorb Your Liability
If a tax preparer helped you build the fake business, they face their own penalties, but that does not reduce yours. A preparer who understates a client’s tax liability due to unreasonable positions faces a penalty of $1,000 or 50% of their fee, whichever is greater. Willful or reckless conduct raises that to $5,000 or 75% of the fee.18Internal 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.10Office of the Law Revision Counsel. 26 US Code 7206 – Fraud and False Statements
Both the taxpayer and the preparer are independently on the hook. The IRS regularly pursues both.