Individuals who do not obtain health coverage, through any source, are subject to a tax penalty unless they meet certain exemptions. The penalties under the so-called individual mandate were phased in over a three-year period starting in 2014 and are scheduled to increase substantially in 2016. This analysis from the Kaiser Family Foundation provides estimates of the share of uninsured people eligible to enroll in the marketplaces who will be subject to the penalty, and how those penalties are increasing for 2016.