The Effect of Eliminating the Affordable Care Act's Tax Credits in Federally Facilitated Marketplaces.

In this study, RAND Corporation researchers assess the expected change in enrollment and premiums in the Patient Protection and Affordable Care Act (ACA)-compliant individual market in federally facilitated marketplace (FFM) states if the U.S. Supreme Court decides to eliminate subsidies in FFM states. The analysis used the Comprehensive Assessment of Reform Efforts (COMPARE) microsimulation model, an economic model developed by RAND researchers, to assess the impact of proposed health reforms. The authors found that enrollment in the ACA-compliant individual market, including plans sold in the marketplaces and those sold outside of the marketplaces that comply with ACA regulations, would decline by 9.6 million, or 70 percent, in FFM states if subsidies were eliminated. They also found that unsubsidized premiums in the ACA-compliant individual market would increase 47 percent in FFM states. This corresponds to a $1,610 annual increase for a 40-year-old nonsmoker purchasing a silver plan.