When Treasury Secretary Scott Bessent talks about the federal government losing up to $500 billion a year to fraud, he is borrowing from a single, contested document: the Government Accountability Office’s April 2024 report (GAO-24-105833), the first comprehensive, government-wide fraud estimate in U.S. history. Its finding was that Washington loses somewhere between $233 billion and $521 billion a year to fraud alone. The concrete anchor Bessent points to, roughly $99 million in payments to dead people blocked by a new Treasury verification system, is a rounding error against that headline. That is the point.
What GAO Actually Measured
The GAO used Monte Carlo simulation to model undetected fraud across fiscal years 2018 through 2022, with pandemic-era programs pushing the estimate toward the upper end. The range represents roughly 3% to 7% of average federal obligations, or between $1,431 and $3,200 per individual income tax filer, based on about 162.8 million filers.
The number is contested. When GAO released it, Jason Miller, then-deputy director for management at the Biden White House’s Office of Management and Budget, called the estimate “not plausible” and warned it would “create confusion and promote misleading generalizations.” The Biden administration pushed back on the very figure a Trump Treasury secretary now cites.
The Dead-People Anecdote
Bessent’s illustration comes from Treasury’s payment verification system, expanded under Executive Order 14249, signed March 25, 2025. The system screened about 885 million federal payments worth $2.77 trillion, flagging roughly 4,900 to 5,000 payments worth about $99 million heading to deceased individuals. Congress followed with the Ending Improper Payments to Deceased People Act in February 2026, giving Treasury permanent access to the Social Security Full Death Master File.
Bessent’s framing: “Treasury has delivered on a key promise of President Trump’s mandate to stop improper payments and fraud before money leaves the Treasury, and strengthen the integrity of the federal payment system.”
The ROI Case
A three-year pilot integrating the Death Master File into Treasury’s Do Not Pay system prevented or recovered about $113.5 million in its first full calendar year (2024) against $4.6 million in implementation costs, a return of roughly $23 for every $1 spent. Treasury projects more than $337 million in net benefits over the pilot’s full run. Treasury’s Office of Payment Integrity prevented or recovered about $653 million in fiscal 2023, growing to over $4 billion in fiscal 2024. The Do Not Pay Business Center reported $11.7 billion prevented, detected, or recovered, roughly an 18-fold increase over about two years, driven by a 139% jump in death-data matches and $1 billion recovered via AI and machine-learning check-fraud detection.
The Confirmed Ledger
Separate from GAO’s modeled range, agencies actually reported $186 billion in improper payments in fiscal 2025 across 64 programs, with the five largest sources (Medicaid, Medicare Fee-for-Service, Medicare Advantage, Unemployment Insurance, and one other) accounting for roughly $128 billion, about 66% of the total. Cumulative reported improper payments since fiscal 2003 total roughly $2.8 trillion to $3 trillion. The Cato Institute has proposed restructuring federal welfare, converting Medicaid and CHIP into a zero-growth block grant and eliminating federal funding for SNAP, TANF, and child nutrition, for claimed savings of nearly $6 trillion over a decade. That is a program-design proposal, not a fraud fix.
Context matters at the current 3.75% federal funds rate and a 10-year Treasury yield of 4.71%. The signal to watch is adoption: fewer than 10% of federal agencies currently use Treasury’s payment-integrity tools. Whether that share climbs over the next few quarters will determine if Bessent’s $500 billion talking point becomes a recovery story or stays rhetorical.
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