This brief examines whether the Affordable Care Act (ACA) has increased part-time work using recent Current Population Survey data. We find a small increase in part-time work in 2014 beyond what would be expected at this point in the economic recovery, attributable to an increase in involuntary part-time work. The increase is not specific to part-time work as defined by the ACA (less than 30 hours per week). Moreover, job transition patterns suggest that the increase in part-time work in 2014 is more likely due to a slow recovery of full-time jobs following the Great Recession than the ACA.