The process of selecting, implementing, and scaling-up evidence-based practices is a major focus and difficult accomplishment for states. Renewed commitment to improving student outcomes has led directly to the need for effective practices implemented at scale. The funding decisions made at state, regional, and district levels remain a key to large-scale implementation of effective practices. In this article, we summarize the funding decisions of nine states that implemented School-Wide Positive Behavioral Interventions and Supports (SWPBIS) across at least 500 schools or 30% of the schools in the state. A survey about funding sources, funding levels, and funding decisions was completed by the key implementers in each state, and a follow-up interview was used to clarify and confirm initial information. The results indicate that different states used different funding approaches, but in general, funding of SWPBIS was provided predominantly through special education sources and that initial demonstrations led to larger scale implementation when state policy makers developed creative procedures for using multiple funding sources within a unified implementation effort. Implications for funding the scaling of evidence-based practices are discussed.