Despite the new tax rate reductions from the Jobs and Growth Tax Relief Reconciliation Act of 2003, the top marginal income tax bracket for many retirees is a whopping fouthy-six.3%. Why? Because Social Security benefits are subject to income income tax. Those affected are Social Security recipients who have enough good fortune (misfortune?) to be subject to both the 25% taxes bracket along with the 85% inclusion rate for Social Security benefits. What may be the rate? In the rate or rates en...