This report presents the results of Milliman’s 2018 Annual Survey of the U.S. Individual Disability Income (IDI) Insurance Market. Fourteen insurance companies that are active in the U.S. IDI market provided data and other information about new business sold from 2013 to 2017, sales distributions, underwriting requirements, product offerings and pricing, favorable and unfavorable trends, and opportunities and obstacles affecting the IDI market. The scope of the IDI market in this survey includes traditional noncancelable and guaranteed renewable IDI policies.