25 states have introduced programs that offer a tuition-free pathway to degrees or credentials to a substantial portion of their residents. Today's statewide "Promise" programs vary widely in terms of their scope, their generosity, and how they function. As a result, states like Michigan that are considering introducing or expanding tuition-free college Promise programs have many different models they can follow, each with different strengths and weaknesses. This report considers two design options for an expansion of tuition-free college in Michigan. The first model would cover community college tuition for recent high school graduates. The second model would cover bachelor's degrees at the state's public colleges and universities for recent high school graduates from families whose income falls below a specified threshold. The two models could be combined to provide students with a broader range of options. The authors project the costs of each model over five years and outline the strengths and weaknesses of each.