You could get a hefty check from Social Security during retirement, but only a small percentage of seniors qualify for the maximum benefits. Getty Images/iStockphoto

For millions of seniors, Social Security represents far more than just a government benefit. It's also their primary source of income in retirement. According to the latest data from the Social Security Administration , 39% of male beneficiaries age 65 and older and 44% of female beneficiaries age 65 and older receive 50% or more of their income from Social Security. And, about 12% of men and 15% of women ages 65 and older rely on Social Security for 90% or more of their income.

With older Americans relying so heavily on these monthly payments, retirees need to know how much they'll receive each month from their Social S

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