T he Old-Age, Survivors, and Disability Insurance (OASDI) program, better known as Social Security, is administered by the Social Security Administration (SSA). The Survivors Insurance component of OASDI covers insured workers in case of death. When a worker insured by Social Security dies, his or her family may qualify for survivors benefits. At the end of 2017, there were approximately 6 million survivor beneficiaries, representing 9.7% of the total OASDI beneficiary population. Average monthly survivors benefits in December 2017 were $1,151.71. That month, 80.9% of survivor beneficiaries were female (including female children) and 31.8% of survivor beneficiaries were children. Additional data on survivor benefits are provided in Table 1 at the conclusion of this report. The Social Security Act of 1935 (P.L. 74-271), which created the Social Security program, did not include any provisions for monthly survivors benefits, but did include a lump-sum payment upon the death of a fully insured person over the age of 65. Monthly survivors benefits were established in the Social Security Amendments of 1939 (P.L. 76-379), including those for widows, parents, and children. This was offset by a reduction in the size of the lump-sum death payment, although coverage expanded to both fully or currently insured workers (defined in the " Lump-Sum Death Benefits " section), regardless of age. These changes were made to "afford more adequate protection to the family as a unit" than could be afforded by a single lump-sum payment that did not take into account family size or number of survivors. Coverage for survivors benefits is based on the insurance status of the deceased worker. To become insured for survivors benefits, a worker must have a sufficient work history in covered employment (employment subject to Social Security payroll taxes). A worker can earn up to four Social Security credits each year, based on his or her earnings in a covered job. The number of credits a worker needs to qualify for Survivors Insurance depends on how old the worker is when he or she dies. A worker is fully insured for benefits if he or she has earned at least one credit for each year between age 21 and turning 62, dying, or becoming disabled; a worker is permanently insured if he or she has at least 40 credits (at least 10 years of work). In 2017, 87% of Americans over the age of 20 were fully insured. Spouses, former spouses, children, and parents of fully insured workers are eligible for survivors benefits as long as they meet the other requirements for those benefits. A deceased worker's children and the (former) spouse caring for those children could be eligible for survivors benefits even if the deceased worker was not fully insured―survivors benefits are available to these dependents if the deceased worker was currently insured at the time of death. The deceased worker is currently insured if he or she earned at least six credits during the three years prior to death. Survivors benefits are determined using the same basic formula used to calculate Social Security retirement and disability benefits. Benefits are based on the average lifetime covered earnings of the worker who died, so survivors of higher earners tend to receive higher benefits than survivors of lower earners. However, the benefit formula is progressive, so survivors benefits replace a higher proportion of lower earners' wages than of higher earners' wages. When a person applies for survivors benefits, the deceased worker's basic benefit amount, called the primary insurance amount (PIA), is determined. Each qualifying survivor will receive a percentage of the worker's PIA, depending on the survivor's age and relationship to the deceased worker. Survivors benefits may be subject to reductions based on earnings and family size. If a survivor qualifies for benefits based on both his or her own work record and a spouse's record, the survivor receives the higher amount of the two. Survivors benefits, like all Social Security benefits, are subject to an annual cost-of-living adjustment (COLA). In most cases, survivors benefits are payable to eligible family members beginning with the deceased beneficiary's month of death, regardless of when the death occurred during the month. Table 1 , at the conclusion of this report, provides data on the various types of survivors benefits. Surviving spouses of fully insured workers must meet an age requirement to be eligible for widow's or widower's benefits. Divorced surviving spouses may also be eligible if they were married to the deceased worker for at least 10 years. Surviving spouses receive 100% of the deceased worker's PIA if they begin to collect survivor benefits at their full retirement age. Widow(er)s may receive reduced widow(er)'s benefits if the benefit is claimed early. The earlier the benefit is claimed, the larger the reduction is. Reduced benefits range from 71.5% of the worker's PIA, if the widow(er) claims at the age of 60, to 100% of the worker's PIA, if the widow(er) claims at full retirement age. If the surviving spouse is receiving Social Security disability benefits, they may begin to receive reduced widow(er)'s benefits as early as 50 years old. Disabled widow(er)s receive 71.5% of the worker's PIA. Widow(er)'s benefits are not paid to spouses or former spouses who remarry before the age of 60 (or aged 50 if disabled). A worker's claiming age affects the widow(er) benefit. If a worker is receiving reduced benefits due to claiming benefits before full retirement age, the widow(er) benefit cannot exceed the worker's reduced benefit amount. For workers entitled (or who would have been entitled) to an increase (or subject to being increased) in their benefit amount due to claiming benefits after full retirement age, their benefits are increased at death to take into account the delayed retirement credits from claiming benefits after full retirement age, thereby increasing the widow(er) benefit. If they are not eligible for widow(er)'s benefits, unmarried surviving spouses of fully or currently insured workers may be entitled to mother's or father's benefits. To qualify, the spouse must care for a child of the deceased worker who is either under the age of 16 or disabled. Divorced spouses may also qualify, regardless of the length of the marriage. Mother's and father's benefits are 75% of the worker's PIA, and may be collected regardless of the age of the mother or father. Surviving children of fully or currently insured workers may be entitled to child's benefits. Child's benefits are paid to unmarried surviving children who are under the age of 18, or under 19 if still in high school. They are also paid to the disabled children of insured workers, regardless of age, as long as the disability occurred before the age of 22. Biological and adoptive children are eligible for survivors benefits, as are children born out of wedlock. Dependent grandchildren and step-children may also qualify for these benefits. Child's benefits are 75% of the worker's PIA. The surviving parents of fully insured workers are eligible for parent's benefits if they are over the age of 62 and were receiving at least half of their support from the deceased worker. Parent's benefits are 82.5% of the worker's PIA if one parent is entitled to benefits and 75% of the worker's PIA (for each parent) if two parents are entitled to benefits. The total survivors benefits paid to an insured worker's family are capped regardless of the number of family members who qualify for benefits. The maximum family benefit is 150% to 188% of the worker's PIA, depending on the amount of the PIA. If the total survivors benefits payable to a worker's family exceed this maximum, each person's benefit will be reduced proportionately. Divorced widow(er) benefits do not count toward the maximum. Survivors benefits may also be reduced for beneficiaries who are working and younger than full retirement age. Survivor beneficiaries younger than full retirement age are subject to a retirement earnings test , wherein their benefits are reduced if their earnings exceed certain limits. The benefits of other family members would not be affected by this reduction. Working in employment not covered by Social Security can also lead to lower benefits. The government pension offset (GPO) affects the benefits of beneficiaries who have worked in non-covered employment. If the survivor receives a government pension based on non-covered work, the GPO will reduce the survivors benefits by two-thirds of the survivor's monthly pension amount. In addition to monthly survivors benefits, a deceased worker's family may be eligible to receive a one-time death benefit of $255. Only one lump-sum death benefit is payable to the family of an insured worker. The lump-sum death benefit is paid to the insured worker's surviving spouse, regardless of age, as long as the spouse meets certain requirements. If no eligible widow or widower exists, the death benefit is paid in equal shares to any children who qualify for child's benefits based on the deceased worker's record. If a worker leaves no eligible spouse or child, the lump-sum death payment will not be paid.