Getting a letter from the IRS or the Minnesota Department of Revenue is unsettling for almost anyone. Most people assume the worst the moment that envelope arrives. But there is a significant legal difference between a routine tax audit and a criminal tax investigation, and understanding that difference may be one of the more important things you can do if you ever find yourself on the receiving end of either one.
At Mauzy Law Office, we work with clients across Minneapolis and the Twin Cities who are navigating serious tax matters, including situations that have crossed from civil territory into white collar and economic crimes. The gap between a civil audit and a criminal investigation is not just procedural. It is the difference between paying a bill and potentially facing federal prosecution.
What a Tax Audit Actually Is
A civil IRS investigation generally involves an audit or collections action. In a civil case, the IRS is determining whether you owe additional taxes, penalties, or interest. Think of it as a financial review. The government wants to verify that what you reported on your return matches what you actually earned, spent, and deducted.
Audits come in different forms. Some are handled entirely through the mail, where you send in documentation to support a specific line item. Others involve a meeting at an IRS office, and some, particularly for businesses, result in agents coming to your location to review your books in person. During an IRS audit, the agency reviews tax returns, financial statements, and other relevant documents to verify that income, deductions, and credits have been accurately reported.
Consequences of a civil audit include additional tax liability, penalties, and interest, but no jail time. That last part matters. A civil audit, even a painful one that results in a significant bill, does not put your freedom at risk. It is a financial matter, not a criminal one. Minnesota’s Department of Revenue operates similarly at the state level, with authority to make reasonable examinations or investigations of a taxpayer’s place of business and to inspect and copy relevant books, records, papers, and documents in order to determine the accuracy of a return or fix liability under state revenue law.
What Makes a Criminal Tax Investigation Different
The primary difference between civil and criminal tax investigations is their purpose. Civil investigations are designed to determine whether a taxpayer owes additional taxes, penalties, or interest, while criminal investigations are intended to investigate potential willful violations of the tax laws and, when appropriate, support prosecution.
A criminal tax investigation is handled by IRS Criminal Investigation (CI), a division of the IRS that operates like a law enforcement agency. CI agents, sometimes called special agents, investigate tax fraud, tax evasion, and other financial crimes. These are not revenue agents with clipboards. IRS CI special agents are sworn federal law enforcement officers with unique financial and forensic accounting backgrounds, and their primary function is to follow the money in complex financial crimes.
At the state level in Minnesota, the Criminal Investigation Division reviews and investigates alleged violations of Minnesota tax laws, with investigators uncovering complex financial crimes and recommending criminal charges for the most serious criminal activity. When taxpayers do not obey the law, the Minnesota Department of Revenue will investigate and may seek criminal charges or other penalties and recommend civil action or criminal prosecution, if warranted.
Under Minnesota law, the stakes are real. A person required to pay or collect and remit a tax who willfully attempts to evade or defeat a tax law by failing to do so when required is guilty of a felony. A person who files a return, report, or other document known to be fraudulent or false concerning a material matter is also guilty of a felony.
How a Civil Audit Can Become a Criminal Investigation
About those moments when a routine audit quietly shifts into something much more serious… this is where we see clients get into real trouble, often without realizing what has happened.
A civil audit can turn into a criminal case if the IRS finds evidence of intentional wrongdoing. The process is not random. A Revenue Agent is required to refer a case to IRS Criminal Investigation when firm indications of fraud are present. This includes consistent patterns of unreported income, false statements during the audit, concealment of assets, and obstructive behavior.
And here is something most people do not know: the IRS may not tell you when a civil audit is being referred for criminal investigation. The shift can happen quietly. Criminal investigations often begin discreetly, with special agents conducting interviews or issuing subpoenas. If special agents identify themselves, it is likely a criminal matter.
Once a case has been accepted for criminal investigation, the civil audit may pause or proceed in coordination with CI. A criminal tax case cannot necessarily be resolved simply by paying the tax due. That last sentence deserves a second read. You cannot simply assume that writing a check will make a criminal investigation go away. The process has moved into entirely different legal territory.
When Should You Be Concerned
A few things tend to signal that a matter may be moving beyond a standard audit. If an IRS agent suddenly stops communicating and your audit goes quiet without explanation, that can be a warning sign. If you are in the midst of a civil tax audit and the IRS examiner suspects fraud, the audit may be paused without a complete explanation. Questions about cash transactions, offshore accounts, or bank deposits that exceed your reported income are also worth taking seriously. If your audit has involved questions about cash, offshore accounts, or unreported income, those questions can involve potential indicators of tax noncompliance or fraud.
If someone identifies themselves as an IRS special agent rather than a revenue agent or revenue officer, the nature of the contact has changed significantly. At that point, the conversation you have without an attorney present could become evidence.
Getting the Right Kind of Help
While civil cases focus on recovering unpaid taxes, criminal cases can result in incarceration and a permanent criminal record. The distinction also affects the legal strategies and defenses that can be employed. A criminal tax investigation may require an attorney who understands both the tax code and criminal defense, although CPAs and other tax professionals may also assist.
We work with individuals and businesses throughout Minneapolis, including clients in Hennepin, Ramsey, Anoka, and Dakota counties, who are facing serious tax scrutiny at the federal and state level. If you have received an audit notice, been contacted by an IRS special agent, or have reason to believe your tax situation may be more complicated than a simple correction, contact Mauzy Law Office. Early consultation is not just helpful. In our experience, it is often the difference between a manageable outcome and a much harder road ahead.