Despite fresh tax rate reductions among the Jobs and Growth Tax Relief Reconciliation Act of 2003, tips for sites marginal income tax bracket for many retirees is really a whopping 46.3%. Why? Because Social Security benefits are subject to income taxation. Those affected are Social Security recipients who include the good fortune (misfortune?) turn out to be subject to both the 25% taxes bracket and also the 85% inclusion rate for Social Security benefits. There are two terms in tax law ...