The Old Age, Survivors, and Disability Insurance (OASDI) program is the official name for Social Security in the United States. The federal OASDI tax noted on your paycheck funds this program that provides benefits to retired adults and people with disabilities—and to their spouses, dependents, and survivors.

The goal of the program is to partially replace income that is lost due to old age, the death of a spouse (or qualifying ex-spouse), or disability.