historical series of earnings historical series of earnings certain amount of income varies from year to year Quarter of Coverage 40 quarters of social security coverage Quarter of Coverage historical series of earnings historical series of earnings historical series of earnings sufficient income historical series of earnings 40 eligible quarters under the Social Security Act historical series of earnings 40 eligible quarters under the Social Security Act annual wages or income The numbers involved are somewhat complicated historical series of earnings website Quarter of Coverage the figure was set at $1,320 historical series of earnings 40 trimestres elegibles bajo el Ley de Seguro Social 40 trimestres elegibles bajo la Ley de Seguridad Social quarters of coverage historical series of earnings https://www.ssa.gov/OACT/COLA/QC.html