Despite the tax rate reductions for this Jobs and Growth Tax Relief Reconciliation Act of 2003, the top marginal income tax bracket for many retirees is really a whopping fouthy-six.3%. Why? Because Social Security benefits are subject to income financial. Those affected are Social Security recipients who check out good fortune (misfortune?) pertaining to being subject to both the 25% income tax bracket and also the 85% inclusion rate for Social Security benefits. When big amounts of tax ...