Summer Electronic Benefit Transfer (EBT), or SUN Bucks, is a new federal program that provides grocery benefits to low-income families with children during the summer months, when children no longer have access to free or reduced-price meals at school. However, 13 states did not opt into the program when it launched in 2024. To understand how the US Department of Agriculture (USDA) could improve the program and drive more states to opt in, this study asked 42 state Supplemental Nutrition Assistance Program (SNAP) directors what barriers they faced to implementing the new program. From May to June 2024, the Urban Institute and the American Public Human Services Association surveyed state SNAP directors and asked them what challenges they faced during the Summer EBT plan writing and approval process, while building or managing data infrastructure for the program, when working with state agencies, and with issuing benefits. This summary outlines what challenges states faced and how the USDA’s Food and Nutrition Service (FNS) could improve the program’s implementation and ultimately drive more states to opt in.