Although managed care is expanding into the intellectual and developmental disabilities (IDD) service system, there is little agreement about measurable and meaningful outcomes for people with IDD, including for use in value-based payments (VBP). In this study, we examined potential VBP metrics for people with IDD—relationships between quality and costs. We analyzed Basic Assurances data and long-term services and supports billing data from 68 human service organizations that supported 6,608 people with IDD. Our final hierarchical regression model predicted 66.40% of the variance of annual long-term services and supports (LTSS) billing per person. Our findings suggest quality assurance indicators can account for a significant portion of cost variance—quality metrics represent a potential for cost savings and efficient service delivery.