SOCIAL INSURANCE · 5 MIN READ

Social Security Basics: Insured Status and Retirement

Social Security (Title II of the Social Security Act) is officially called OASDI — Old-Age, Survivors, and Disability Insurance. Workers earn coverage by paying FICA payroll taxes, and eligibility is measured in Quarters of Coverage (QCs, also called credits). A worker can earn up to four QCs per year, and the amount of earnings needed for one QC is indexed annually. The two insured statuses you must know are fully insured and currently insured. Fully insured generally requires 40 QCs — roughly ten years of covered work — and once attained it is permanent: it can never be lost, even if the worker never works another covered quarter. Currently insured is a lesser status requiring 6 QCs in the 13-quarter period ending with death; it unlocks only limited survivor benefits, not retirement benefits. Retirement benefits are built on the worker's Primary Insurance Amount (PIA), a figure derived from average indexed monthly earnings run through a weighted bend-point formula that replaces a higher percentage of income for lower earners. Full Retirement Age (FRA) depends on birth year. Claiming before FRA permanently reduces the benefit; delaying past FRA earns Delayed Retirement Credits of 8% per year up to age 70, after which no further credits accrue. Workers who claim early and keep working face the retirement earnings test, which temporarily withholds benefits when earnings exceed an annual threshold before FRA. Two more mechanics round out the retirement picture. Benefits receive an annual cost-of-living adjustment (COLA) based on the CPI-W, comparing the third-quarter (July-September) average with the same quarter of the last year a COLA was paid; if the index falls, benefits are simply not reduced. Finally, benefits can be partially taxable: depending on provisional (combined) income, up to 50% or up to 85% of benefits are includible in gross income — never 100%. Historically, the Government Pension Offset (GPO) cut spousal and survivor benefits by two-thirds of a pension from non-covered government work, and the Windfall Elimination Provision (WEP) reduced the worker's own benefit — but the Social Security Fairness Act of 2024 repealed both for benefits payable for months after December 2023. Exams may still test the old formulas as historical rules.