IRS Enforcement Stalls: Staffing Losses and Funding Gaps Undermine Tax Compliance Efforts

The United States tax system is currently navigating a period of profound instability, marked by a paradox of record-breaking revenue collection coupled with a deteriorating enforcement apparatus. According to a new report from the Treasury Inspector General for Tax Administration (TIGTA), the Internal Revenue Service (IRS) experienced a significant decline in enforcement activity throughout fiscal year 2025. This contraction stems from a rapid evaporation of staffing levels and the total exhaustion of supplemental funding provided under the Inflation Reduction Act (IRA) of 2022.

While the agency continues to bring in unprecedented sums of federal tax revenue—totaling $5.3 trillion in fiscal 2025—the watchdog’s findings suggest that the IRS is losing its ability to police compliance, particularly among high-income earners. As the agency sheds the human capital it spent years recruiting, experts warn that the long-term integrity of the tax system may be at risk.

The Chronology of a Shrinking Workforce

To understand the current crisis, one must look at the volatile trajectory of IRS staffing over the past three fiscal years. The story of the IRS from 2023 to early 2026 is one of a brief, aggressive expansion followed by a harsh, systemic contraction.

The IRA Expansion (2023–2024)

Following the passage of the Inflation Reduction Act, the IRS embarked on an ambitious hiring spree designed to modernize its technology and bolster its examination and collection divisions. In fiscal year 2023, the agency maintained an enforcement workforce of 20,098 employees. By the end of fiscal 2024, that number had surged to 27,217, representing a significant investment in the agency’s capability to conduct complex audits and pursue high-net-worth tax evasion.

The Fiscal Cliff (2025–2026)

The momentum stalled abruptly as supplemental funding began to dry up. By the close of fiscal 2025, the enforcement workforce had plummeted back to 19,612—effectively wiping out the gains made during the previous two years. The decline continued into the new calendar year; as of January 10, 2026, TIGTA reported that the enforcement staff had shrunk further to just 17,517 employees. This rapid turnover has left the agency with fewer resources than it possessed even before the IRA investment began, creating a precarious environment for tax administration.

Supporting Data: The Erosion of Oversight

The TIGTA report provides a granular look at how these personnel losses have manifested in weakened operational metrics. The impact is not merely administrative; it translates directly into a reduced capacity to hold taxpayers accountable.

Examination Declines

The most striking metric is the 30% decline in individual examination starts from fiscal 2024 to fiscal 2025. This reduction was not limited to lower-tier filers; examinations of taxpayers with income exceeding $400,000—a key target for the agency’s enforcement priorities—fell by 27% during the same period.

Revenue Volatility

The financial metrics tell a story of "boom and bust." Revenue attributed to IRS examination activities saw a healthy 41% increase between fiscal 2023 and fiscal 2024. However, that growth reversed in fiscal 2025, with examination-driven revenue falling by 35%. Proposed additional taxes resulting from these audits dropped from $31.9 billion in 2023 to $26.8 billion in 2025.

While the IRS still managed to collect a total of $93.8 billion in enforcement revenue in 2025, this was a decline from the record-high $98.7 billion collected in 2024. TIGTA clarifies that the total revenue numbers remain buoyed by collection activities—such as automated notices for nonfilers—rather than the high-touch, investigative work of tax examinations.

The Role of Automated Compliance

While examinations have suffered, the IRS has managed to maintain some level of fiscal performance through the resumption of automated collection programs. During the COVID-19 pandemic, the IRS was forced to pause many of its automated compliance notices due to massive backlogs and administrative paralysis.

As those systems were brought back online, the IRS saw a 17% increase in collection revenue between 2023 and 2025. This success, however, is a low-hanging fruit; automated notices are effective for catching simple nonfilers or those with clear tax discrepancies, but they are insufficient for addressing complex tax avoidance strategies used by wealthy individuals and corporations. The TIGTA report underscores that relying on automated collection to mask the collapse of the examination division is a strategy with limited utility.

Official Responses and the "Downstream" Warning

TIGTA’s report, which arrived without formal recommendations, serves as a stark warning to lawmakers. The agency’s assessment is that while the immediate metrics for fiscal 2025 are troubling, the true damage will be felt in the coming years.

"While the workforce reductions influenced metrics in FY 2025, the downstream effects of these reductions are likely to become more apparent over time," the report stated.

The exhaustion of the Inflation Reduction Act’s supplemental funding, which officially concluded on December 31, 2025, represents a fundamental shift in the agency’s fiscal reality. Without a clear path toward sustainable funding, the IRS finds itself in a cycle of hiring and firing that prevents the long-term retention of institutional knowledge. The loss of specialized agents—particularly those trained to navigate the intricacies of high-income tax returns—cannot be replaced by a simple budget increase next year; the training and maturation of a revenue agent is a multi-year process.

Broader Implications for the Tax System

The implications of this decline extend far beyond the IRS’s internal balance sheet. A weakened IRS has historically been correlated with a decline in "voluntary compliance"—the bedrock of the U.S. tax system.

The Compliance Gap

When the public perceives that the likelihood of an audit is low, the incentive for aggressive tax planning or outright evasion increases. If high-income earners and large corporations realize that the agency lacks the personnel to examine their returns, the systemic "tax gap"—the difference between taxes owed and taxes paid—is poised to widen.

Legislative Tensions

The report reignites the debate over IRS funding in Washington. Proponents of robust IRS funding argue that every dollar invested in the agency yields a multiple in return, reducing the deficit and ensuring fairness. Conversely, critics of increased funding often point to the agency’s inefficiency, arguing that the IRS should focus on internal restructuring rather than increased staffing. The TIGTA findings provide ammunition for both sides: those who argue that the agency cannot function without consistent funding, and those who point to the "boom and bust" cycle as evidence of poor fiscal management.

The Future of Fiscal 2026 and Beyond

As the agency moves into the latter half of the decade, the lack of a stable funding model remains the primary obstacle to effective tax administration. The exhaustion of IRA funding has left the IRS in a state of limbo. Without a legislative fix to address the budget cliff, the agency’s ability to perform its core mission—ensuring that all taxpayers pay their fair share—will likely continue to atrophy.

The TIGTA report concludes that the agency’s enforcement revenue remains higher than 2023 levels, but this is a fragile baseline. By prioritizing automated collections over substantive examinations, the IRS is essentially choosing a short-term, high-volume strategy that ignores the complexities of the modern tax landscape. As the workforce continues to shrink, the gap between the agency’s mandate and its capacity will continue to grow, potentially leaving the U.S. government billions of dollars short of the revenue it needs to fund its obligations.

In summary, the IRS is currently operating in a state of managed decline. While it continues to process trillions of dollars in revenue, the infrastructure that keeps the system honest is fracturing. Whether Congress chooses to intervene with long-term, predictable funding or allows the status quo of "hiring and firing" to continue remains the defining question for the future of American tax enforcement.