In this report, the authors use a mixed-methods approach to examine potential barriers to equity in stackable credential pipelines in Colorado and Ohio. The study analyzed administrative and interview data to describe patterns in credential-stacking and in earnings for low-income individuals relative to middle- and high-income individuals. The study found that low-income certificate-earners earned stacked credentials and went on to earn longer term credentials at higher rates than middle- and high-income certificate earners.