Wealthy Americans filing tax returns with $1 million or more in income face far less scrutiny from the IRS than they did a decade ago. The agency examined roughly 16,800 such returns in the most recent fiscal year on record, a steep fall from about 41,000 a decade earlier. That decline has unfolded even as the Treasury Department maintains a standing directive for the IRS to audit at least 8 percent of returns reporting $10 million or more in total positive income, raising hard questions about whether the agency can enforce the tax code evenly across income levels.
Falling audit counts and the pressure on IRS examiners
The drop in millionaire audits did not happen overnight. A Government Accountability Office review of high-income audit trends from FY2010 through FY2021 documented a sustained erosion of examination activity at the top of the income scale. Audit rates declined for filers reporting more than $10 million in total positive income between tax years 2012 and 2018, according to an IRS statement on examination coverage in the 2022 Data Book. The agency itself acknowledged that recent coverage rates look incomplete partly because many high-income returns remain within the statute-of-limitations window and could still be selected for audit.
A simple budget narrative does not fully explain the shift. The IRS lost experienced revenue agents during years of flat or shrinking appropriations, but the agency also redirected remaining examiners toward other priorities, including Earned Income Tax Credit compliance and pandemic-era relief programs. The result was a lopsided enforcement posture: lower-income filers faced audit attention that held relatively steady or even increased, while the most complex, highest-dollar returns received less and less review. The Taxpayer Advocate Service has flagged this pattern, warning that enforcement resources have tilted away from the wealthiest filers and toward taxpayers with far less ability to contest an audit.
For front-line examiners, this environment has meant heavier caseloads and a shift toward narrower, issue-focused reviews rather than comprehensive examinations of complex returns. High-income audits often require specialized knowledge of partnerships, pass-through entities, and international tax rules, skills that take years to develop and are not easily replaced when senior agents retire or leave the agency. As those experts have thinned out, managers have had to make trade-offs, opening fewer large cases and allowing more high-risk returns to pass with minimal scrutiny.
What GAO and IRS data reveal about high-income enforcement
Two major government accountability reports anchor the public record on this trend. A 2024 GAO analysis of closed high-income audits between FY2012 and FY2022 found persistent workforce and program-management constraints limiting the agency’s ability to meet Treasury’s 8 percent audit-rate target for the highest earners. The GAO concluded that “opportunities exist to improve IRS high-income/high-wealth audits,” pointing to staffing shortfalls and case-selection weaknesses that have compounded over time.
The IRS publishes its own examination statistics through the annual Data Book, with Table 3-1 reporting examination coverage and recommended additional tax by return type and income size. Older Data Book methods divided fiscal-year closures by prior-year filings, a calculation that can understate or overstate true audit risk for any given filing year because high-income cases often stay open for several years. More recent IRS explanations emphasize that coverage rates for the latest years are preliminary, since many complex returns remain within the statute-of-limitations period and may still be audited.
Even with those caveats, both GAO and IRS figures tell a consistent story: audit coverage for the highest-income filers has fallen faster and further than coverage for most other groups. GAO’s work shows that, while the number of returns reporting $1 million or more in income grew over the past decade, the number of examinations plunged, leaving a widening gap between policy goals and operational capacity. The report also notes that recommended additional tax from high-income audits remains substantial, suggesting that reduced coverage likely translates into significant foregone revenue.
Uneven enforcement and the road ahead
The implications reach beyond dollars collected. When taxpayers see that those with the most income and the most sophisticated advisors are less likely to be audited, confidence in the fairness of the tax system erodes. Lower- and middle-income filers, who often face automated correspondence audits with limited access to representation, may perceive a double standard in which the wealthy enjoy both more opportunities to avoid tax and less oversight when they do.
GAO has urged the IRS to refine its case-selection models for high-income returns, strengthen quality review of complex examinations, and develop better measures of how staffing levels affect audit outcomes. Implementing those recommendations will require sustained investment in specialized personnel and modernized data tools, as well as clearer performance metrics tied to the Treasury’s 8 percent audit directive. The IRS, for its part, has said it intends to rebuild high-income enforcement capacity and has begun hiring campaigns focused on experienced revenue agents and specialists.
Whether those efforts can reverse a decade of declining scrutiny remains uncertain. The structural challenges GAO identified-aging expertise, long training pipelines, and the sheer complexity of high-wealth tax planning-cannot be solved quickly. But the data now assembled by oversight bodies and the IRS itself leave little doubt about the stakes: without a credible audit presence at the top of the income distribution, the promise of an evenhanded tax system becomes harder to sustain.
David M. Keller is a finance writer based in Columbus, Ohio, covering personal finance and consumer-focused economic topics. He earned his degree in journalism from Ohio University and began his career reporting on local business and economic trends for a regional media outlet. Since then, he has contributed to a variety of online publications, focusing on clear, practical coverage of topics such as cost of living, debt, and everyday financial decision-making.
