Earnings Base & Tax - The taxable wage base limits the amount of earnings that are taxable under Social Security's Old Age, Survivor, and Disability Insurance (OASDI) program. Both employers and employees pay 6.20% on these earnings to fund the OASDI program. This wage base is adjusted annually for inflation. Because the maximum taxable wage base for Medicare (HI) was eliminated by the Omnibus Budget Reconciliation Act of 1993, there is no limit on the earnings subject to the 1.45% Medicare tax.
Earnings Base & Tax Data (.pdf)
Other Program Data - Computing Social Security benefits is a complicated process, requiring detailed information related to an individual's earnings record, eligible periods of coverage, and the formula for calculating the individual's Primary Insurance Amount (PIA).
Other Program Data (.pdf)