Summary: the delayed retirement age,Nn = the number of months of the normal retirement age.The reductions for early retirement and the credit rates for delayed retirements are summarized in Table 1. If a person has earned 40 quarters of coverage under FICA, he or she will be fully insured. Earnings of $900 in 2004 qualify as a credit of coverage (SSA Online—Office of the Chief Actuary
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