In 2014, few health insurance plans sold in the Affordable Care Act's Federally Facilitated Marketplaces had age-dependent tobacco surcharges, possibly because of a system glitch. The 2015 tobacco surcharges show wide variation, with more plans implementing tobacco surcharges that increase with age. This underscores concerns that older tobacco users will find postsubsidy health insurance premiums difficult to afford. Future monitoring of enrollment will determine whether tobacco surcharges cause adverse selection by dissuading tobacco users, particularly older users, from buying health insurance.