What SNAP’s Payment Error Rate Really Means — and Why It Matters for Arizona  

The Supplemental Nutrition Assistance Program (SNAP) helps hundreds of thousands of Arizona families afford groceries. Recently, federal policymakers have increased scrutiny of SNAP’s “payment error rate,” including proposals that would require states to significantly reduce these rates or face financial penalties.  

Under H.R.1, states with higher payment error rates would be required to begin paying a share of SNAP benefits, a cost states have never seen before, as SNAP is a federal program and always has been fully funded by the federal government.  

But the way this metric is often discussed can be misleading.  

The payment error rate does not measure fraud, abuse, or misuse of the program; it measures whether households received the exact benefit amount they were eligible for under SNAP’s complex eligibility rules. 

Understanding what this metric actually captures is important for developing responsible policy and accurately evaluating how the program works.  

What the SNAP payment error rate measures 

Each year, the U.S. Department of Agriculture (USDA) reviews a sample of SNAP cases in every state to determine whether benefits were calculated correctly through the program’s quality control system. 

USDA uses this review process to measure whether participating households received the correct SNAP benefit amount based on program rules. 

These errors include both overpayments and underpayments. Therefore, the error rate reflects situations where a household received slightly more than they should have as well as cases where a household received less than what they qualified for.  

Errors may occur because of administrative complexity or routine changes in household circumstances such as fluctuating income, irregular work hours, or delays in paperwork. The metric measures payment accuracy, not intentional misuse of the program.  

Additionally, the payment error rate does not include instances in which states improperly deny or terminate SNAP benefits for a household that was eligible.  

What the data shows in Arizona  

According to the U.S. Department of Agriculture, Arizona’s SNAP payment error rate was about 8.8 percent in fiscal year 2024, below the national average of 10.9 percent. 

In August 2025, roughly 900,000 Arizonans relied on SNAP to help afford groceries. By January 2026, SNAP participation had fallen to 533,000 Arizonans. Because SNAP serves such a large number of households, even small changes in income, hours worked, or documentation can affect the payment accuracy calculation.  

SNAP error rates reflect complexity, not widespread abuse 

While improving payment accuracy is an important goal, SNAP’s structure makes extremely low payment error rates difficult to maintain.  

SNAP is a large national program with detailed eligibility rules and millions of participating households. Determining the correct benefit amount requires states to calculate income, household composition, deductions, and other factors that can change frequently.  

Several factors contribute to payment errors: 

• SNAP eligibility requires detailed documentation 

• Many households experience fluctuating income or work hours that affect benefit calculations  

• Eligibility workers must process large volumes of cases and documentation 

• Even small administrative mistakes can count as full errors during federal audits 

The changes from H.R. 1 come at a particularly bad time: From stubbornly persistent inflation to a fragile labor market, states are forced to lower error rates when such a program may need to act as an automatic economic stabilizer for families and communities. 

Because the payment error rate measures administrative accuracy rather than fraud, policy experts caution that focusing solely on lowering the rate may not address the underlying causes of errors.  

Instead, improvements such as simplifying program rules and strengthening administrative systems are more likely to improve accuracy while ensuring eligible families can access food assistance.  

What this means for Arizona 

State budget analysts have projected that Arizona’s 8.8 percent payment error rate from Fiscal Year 2024 could rise to roughly 10 percent in Fiscal Year 2025.  

If those levels persist when new federal policy takes effect, Arizona will be required to cover 10 percent of SNAP benefits. According to the Joint Legislative Budget Committee, the error rate will equal about $139 million per year in new state costs, roughly the same amount of funding needed to cover a year of in-state tuition for more than 10,000 students at Arizona’s public universities.