Old-Age and Survivors Insurance, or OASI, is the Social Security program supporting retirement benefits and benefits for qualifying survivors and family members. It is distinct from Disability Insurance, although the two are often grouped as OASDI. It is also different from SSI, a separate program based on limited income and resources. [1][2]
What the OASI trust fund supports
SSA describes the trust fund as providing authority to pay monthly benefits to retired workers and qualifying spouses and children, as well as survivors of deceased insured workers. The fund also supports the program’s authorized costs. It is not an individual savings account that holds each worker’s payroll taxes separately for later withdrawal. [1]
Program financing includes dedicated taxes and other authorized income. Funds not needed for current costs are invested in interest-bearing federal securities under law. Trust-fund accounting should not be confused with an individual’s benefit statement or bank balance. [1][2]
Credits establish insured status
SSA uses work credits to determine eligibility. A person can earn up to four credits per year, and retirement generally requires forty credits. Survivor eligibility uses rules that depend on the worker’s age and circumstances, so a family should not assume every deceased worker needed forty credits before any survivor could qualify. [3]
Additional credits beyond the required minimum do not themselves raise a benefit. SSA explains that the earnings record, rather than the total count of extra credits, determines the amount under the applicable benefit formula. [3]
Retirement and family benefits require separate choices
A worker’s claiming age and earnings history matter, while a spouse’s or survivor’s entitlement depends on its own relationship and eligibility rules. The family payment is not simply a transferable ownership share in the worker’s contributions. The timing and category should be evaluated before filing.
For example, a person may qualify on an individual earnings record and also have a potential family-based benefit. That does not automatically mean both full amounts are added together. Ask SSA which category and calculation apply.
Review the record before relying on an estimate
- Check reported earnings and missing years.
- Identify the needed credits and benefit category.
- Review claiming-age and ongoing-work consequences.
- Report relevant marriage, divorce, and death information.
See how marriage changes different Social Security benefits and SSDI work-incentive rules. Those distinctions help prevent an OASI retirement rule from being incorrectly applied to disability insurance or SSI.
Primary sources
- Old-Age and Survivors Insurance Trust Fund
- Annual Statistical Supplement, 2020 – Social Security Program Description and Legislative History
- Social Security Credits and Benefit Eligibility
Sources checked: October 31, 2026.