This report examines older households’ sources of income, the amounts of this income, and how much each source of income contributes to total income. Older households receive income from a variety of sources, including social programs, private retirement savings, and earnings. Estimates from the 2018 Survey of Income and Program Participation (SIPP) show that in 2017, lower-income households relied on Social Security to a large degree, while higher-income households received a larger share of their income from private retirement savings and earnings.