Health care remains the most expensive sector in the U.S. economy, now accounting for nearly 1 in every 5 dollars spent. The purpose of health care is to improve the health of populations. However, formal medical care is one of many alternatives for improving health. In order to make better use of scarce resources, cost-effectiveness methodologies have been developed to evaluate how to produce the most health within the constraints of available resources. Standardized cost-effectiveness methodologies are now commonly used in the evaluation of medical therapies and new technologies. However, these methods have rarely been employed for the evaluation of behavioral interventions. Behavioral interventions often use measures that are not generally applied in other areas of health outcomes research. A consequence of neglecting to employ standardized cost-effectiveness analysis is that behavioral, psychological, and environmental interventions may be left out of resource allocation discussions. The purpose of this paper is to review standardized approaches to cost-effectiveness analysis and to encourage their use for the evaluation of behavioral intervention programs. Application of standardized methods of cost-effectiveness analysis will allow direct comparisons between investing in behavioral interventions programs in comparison to a wide range of other alternatives. The methods are general and can be used to estimate the cost-effectiveness of social and environmental interventions in addition to traditional medical and surgical treatments. (PsycINFO Database Record (c) 2019 APA, all rights reserved).