The amount of money the Internal Revenue Service collected from audits dropped dramatically last year after the Trump administration pushed out many of the agency’s employees, according to a watchdog report released on Monday.
The report from the Treasury Inspector General for Tax Administration, called TIGTA, showed that I.R.S. audits brought in $6.5 billion in fiscal year 2025, a 35 percent decrease from the $10 billion that audits elicited the previous year. That plunge came after President Trump, at the start of his second term, moved to reduce the size of the federal work force, a push that resulted in the I.R.S. losing roughly 30 percent of its staff dedicated to audits.
That stark reduction in staffing levels had been expected to curb the federal government’s ability to conduct the time-intensive investigations sometimes needed to collect the taxes that people and companies owe. The report, which includes data running through Sept. 30, 2025, the end of the fiscal year, is among the first official assessments of that effect.
The I.R.S. began 30 percent fewer audits of individuals in fiscal year 2025 compared with the prior year, TIGTA said. In one major division of the agency, officials did not start new audits for six months because of uncertainty about whether they would have enough staff to conduct them, according to the report. I.R.S. audits can take years, meaning the full budgetary impact of Mr. Trump’s changes to the agency may not become apparent for some time.
The decline in enforcement efforts comes after the Biden administration tried to revitalize the agency’s ability to go after the wealthy and large companies, approving roughly $80 billion in additional funding for the agency and hiring tens of thousands of new employees. But Republicans and Mr. Trump reversed those efforts, canceling much of the additional funding and downsizing the work force.
Trump administration officials have said that technology like artificial intelligence could help the agency better select taxpayers to audit and more efficiently conduct investigations without the need for as many employees, though it has not publicly detailed its plans for those tools. Frank Bisignano, who is leading the I.R.S. as its first ever chief executive officer, has dismissed concerns about the agency losing tens of thousands of employees last year.
Representatives for the I.R.S. and the Treasury Department did not respond to a request for comment.
While audit revenue plunged, other enforcement efforts saw less dramatic changes, with the I.R.S. gathering roughly the same amount of tax revenue from mailed notices and phone calls about taxes owed. The I.R.S. restarted several collection programs in 2024 that had been suspended during the pandemic, according to the report.
Overall, tax revenue still increased last fiscal year, reaching a record $5.3 trillion. Most American tax revenue comes from payments automatically withheld from workers’ paychecks, and so overall revenue levels largely reflect the performance of the economy and inflation. The I.R.S. estimates that roughly $700 billion in taxes owed under existing law goes unpaid every year.
