Where and how to report suspected tax evasion
The Internal Revenue Service (IRS) accepts reports of suspected tax evasion through Form 211, called a claim for reward. You file it with the IRS Criminal Investigation division, either by mail or through their online whistleblower portal. The IRS also accepts reports through their general tip line, though Form 211 is the official channel if you want to be considered for a monetary reward.
For suspected evasion by a specific business or individual, you will need their name, address, and as much detail as you can provide about what you believe they are hiding — unreported income, inflated deductions, offshore accounts, or cash-only operations. The more concrete your information, the more seriously the IRS will treat the report.
If the suspected evasion involves a state tax (income tax, sales tax, or business tax), contact your state's department of revenue or tax authority directly. Most states have their own whistleblower programs separate from the federal system. A single scheme may involve both state and federal violations, so you can report to both.
Key Takeaways
- File Form 211 with the IRS Criminal Investigation division by mail or through the IRS whistleblower portal if you want to report federal tax evasion and potentially receive a reward.
- You do not need to be a tax professional or have proof — the IRS investigates based on specific details like business names, income sources you believe are hidden, or patterns you have observed.
- State tax evasion is reported separately to your state's department of revenue, which maintains its own investigation and reward programs.
- The IRS keeps your identity confidential during its investigation, though you may be contacted if they need clarification on your report.
What information to include in your report
Start with identifying details: the person's or business's full name, address, phone number, and any business license or tax ID number you know. If you are reporting a business, include what type of business it is and where it operates.
Then describe what you observed or know about the suspected evasion. Examples include: a cash-only business that does not issue receipts, someone claiming business losses year after year while living expensively, a business that pays employees in cash off the books, unreported rental income, or hidden bank accounts. Be specific about dates, amounts, or transactions if you can.
Explain how you know this information — are you a former employee, a customer, a family member, or someone who overheard conversations? The IRS does not require you to have direct access to tax records; suspicions based on observable patterns are reportable.
The IRS whistleblower reward program
If your report leads to a successful IRS investigation and recovery of taxes, penalties, and interest totaling more than $2 million, you may receive a monetary award. The award is typically between 15 and 30 percent of the amount recovered, though the IRS has discretion in setting the percentage.
To be considered for a reward, you must file Form 211 and clearly indicate that you are seeking one. Reports submitted anonymously through the general tip line do not may have access to for rewards. The IRS will not contact you about a reward unless your report results in an investigation that meets the threshold.
The process is slow — investigations can take years, and the IRS will not tell you the outcome or whether a case was opened based on your report. You will only learn about a reward if the IRS contacts you directly.
How to file Form 211
Download Form 211 from the IRS website or request it by mail. The form asks for your contact information, the subject's information, a detailed description of the suspected evasion, and your basis for knowing about it. You do not need to attach documents unless you have them; the form itself is the report.
Mail the completed form to the IRS Criminal Investigation division at the address listed on the form instructions. Processing times vary, but expect several weeks before you receive any acknowledgment. Keep a copy for your records.
Alternatively, use the IRS whistleblower portal online, which allows you to submit your report electronically. The portal is secure and you can track the status of your submission. This method is faster than mail and provides immediate confirmation of receipt.
Reporting to state tax authorities
Each state maintains its own tax evasion reporting process. Most states have a dedicated whistleblower program or a general tip line run by the state department of revenue. Search "[your state] tax evasion report" or "[your state] department of revenue whistleblower" to find the correct contact and form.
Some states offer rewards similar to the federal program; others do not. A few states require you to file a formal complaint, while others accept anonymous tips. The procedures and thresholds vary significantly, so check your state's specific rules before reporting.
If you suspect evasion of sales tax, payroll tax, or business licensing requirements, the state agency responsible for that tax type is the correct place to report. For example, suspected unpaid sales tax goes to the state department of revenue, while suspected wage theft or unreported payroll tax goes to the state labor department or tax authority.
What happens after you report
The IRS or state agency will not tell you whether they opened an investigation or took action based on your report. Whistleblower cases are confidential, and you will not receive updates on the status of your case unless you are contacted for additional information.
If investigators need clarification, they will contact you using the phone number or address you provided on the form. They may ask follow-up questions or request documents you mentioned. Cooperating with these requests strengthens your case and increases the likelihood of a successful investigation.
If your report results in a recovery and you filed for a reward, the IRS will contact you directly with the outcome. This can take several years from the time you file your report.
Protecting yourself when reporting
The IRS and state tax authorities are required to keep your identity confidential during their investigation. You can also file anonymously through the general tip line, though this disqualifies you from a reward. If you file Form 211 seeking a reward, your name will be on record with the IRS, but it will not be shared with the subject of the investigation.
If you are a current or former employee of the business you are reporting, be aware that retaliation for reporting tax violations is illegal under federal law. If you experience retaliation — termination, demotion, reduced hours, or harassment — after reporting, you may have grounds for a separate legal claim. Document the retaliation and consult an employment attorney.
Do not contact the subject of your report or discuss your report with coworkers or others who might relay the information. Let the IRS or state agency conduct their investigation independently.
Frequently Asked Questions
Do I need proof of tax evasion to file a report?
No. You can report based on suspicion or patterns you have observed. The IRS investigates based on the details you provide, and investigators have access to tax records and financial information you do not. Specific observations — like a business that operates entirely in cash, or someone claiming large losses while living expensively — are enough to report.
Can I report anonymously and still get a reward?
No. To be considered for a reward, you must file Form 211 with your name and contact information. Anonymous reports through the general tip line do not may have access to for rewards, though they are still investigated if they contain credible information.
What if I am not sure whether something is actually tax evasion?
Report it anyway. The IRS distinguishes between aggressive tax planning (which is legal) and evasion (which is not). If you are uncertain, describe what you observed and let investigators determine whether it crosses the line. It is better to report something that turns out to be legal than to stay silent about actual evasion.
How long does it take to hear back about a reward?
Investigations can take years, and the IRS will not provide updates on your case. You will only hear back if the investigation results in a recovery that meets the reward threshold and the IRS decides to award you. This process typically takes at least two to three years, sometimes much longer.
Can I report my employer for tax evasion if I still work there?
Yes, and retaliation is illegal. However, consider whether you want to continue working there after reporting. If you do report and experience retaliation, document it and consult an employment attorney about your options.