On March 10, 2021, President Biden signed into law the American Rescue Plan Act (ARP) of 2021. The legislation includes nearly $1.9 trillion in spending, including stimulus checks, funding for state and local governments, incentives for Medicaid expansion, an extension of enhanced unemployment benefits, and more. One of the more impactful healthcare related provisions of ARP is that it includes a temporary expansion of Affordable Care Act (ACA) premium subsidies. This brief examines key features and implications of the additional ACA premium subsidies.