By Rick Yandle, Esq., CPA — federal criminal & civil tax defense
The IRS closed fewer audits in 2025 and has fewer auditors, yet its criminal investigators sent more cases to prosecutors than the year before. A smaller audit program does little to shrink criminal exposure, because very few criminal tax cases begin with an audit.
What the new numbers show
The IRS Data Book for fiscal year 2025 reports 497,621 closed audits, and 81% of them were handled by mail rather than in person. The workforce behind those audits is shrinking. The number of revenue agents on the payroll fell from 10,736 to 8,609 in a single year, about 20%, and revenue officers fell about 24%. The Treasury Inspector General for Tax Administration reported in August 2026 that new individual audits fell 30% in the same year, so the decline in closed audits has further to run.
The criminal side was treated differently. IRS Criminal Investigation lost about 4% of its special agents (2,285 to 2,195), and its referrals to prosecutors rose 14%, from 1,794 to 2,043. It reports an 89% conviction rate.
Criminal cases rarely start with an audit
The most useful number in the new Criminal Investigation annual report is the one about where cases come from. Only 3% of its investigations came from the IRS civil side, which includes auditors. The rest came from U.S. Attorneys' offices (29%), other federal agencies (27%), Criminal Investigation's own work (19%), bank reports filed with FinCEN (12%), tips from the public (6%), and state and local agencies (4%).
So a quieter audit program leaves nearly the entire criminal pipeline untouched. A currency transaction report, a suspicious activity report from a bank, an agency investigating something else, a former business partner, an employee, or an ex-spouse: those are the usual beginnings, and none of them depends on how many revenue agents the IRS employs.
Where investigators are pointed now
The FY2025 figures also show where Criminal Investigation is spending its time. Prosecution recommendations in its return preparer program rose from 91 to 169. Recommendations in its refund-fraud program rose from 43 to 80, and indictments in that program went from 18 to 69. Employment tax recommendations rose from 113 to 142, and non-filer recommendations from 131 to 147.
This is a shift, and the numbers deserve a fair reading. Investigations of abusive tax schemes fell from 92 to 34, the share of agent time spent on tax cases fell to about 63%, and the number of tax fraud cases filed in federal district court was essentially flat (302 in fiscal 2023, 304 in fiscal 2025). The pattern is a narrower aim: preparers, false refund and credit claims, unpaid payroll taxes, and people who stopped filing. Those are cases that can be built from data the government already holds.
A desk audit can still become a criminal case
A correspondence audit is usually a civil matter resolved on paper, and most stay that way. They are also not sealed off from the criminal side. The IRS has written fraud procedures for its campus examiners, and when an examiner sees firm indications of fraud, the case goes to a fraud specialist and can be referred to Criminal Investigation on Form 2797.
The indications are the familiar badges of fraud: income that does not match the bank deposits, explanations that change, records that appear to have been created after the fact, and accounts or payees that were left out. The warning signs on the taxpayer's end are just as familiar. The examiner stops responding, a scheduled step is postponed without explanation, or the questions move away from the adjustment and toward where the money went.
The response itself carries risk. A letter to the IRS is a statement to a federal agency. Willfully giving the IRS a document known to be false is its own crime under Section 7207, a false statement can be charged under 18 U.S.C. Section 1001, and a document signed under penalties of perjury brings in Section 7206(1). An audit that began over a modest adjustment can produce a criminal case of its own through a careless or creative reply.
If a letter is on your desk
Lower odds of an audit are no comfort to the person who already has one. The better question is what the letter is about. If it asks you to document a deduction you can support, it is a paperwork exercise. If it touches income you did not report, deposits you would have to explain, or a return you know was wrong, the response becomes evidence, and it should not be written without counsel. The same is true if a preparer or bookkeeper is drafting the answer for you.
A note for referring counsel
For CPAs and enrolled agents handling correspondence exams, the moment to pause is when the client's explanation changes, when supplied records look reconstructed, or when the issue turns on unreported deposits. The Section 7525 practitioner privilege does not apply in a criminal matter, so what the client tells the representative at that stage can be reached. That is the point to bring in criminal-tax counsel, before the response is filed. I am glad to consult with counsel on where a matter sits.
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