New York City is among the highest-taxed cities in the U.S. The combined federal, state and local income-tax rate for individual filers making $1 million or more in New York City is 48.25% when taking into account deductions, said E.J. McMahon, founder and research director of the Empire Center for Public Policy, a think tank based in Albany, N.Y. That rate, which doesn't include health care or Social Security taxes, would increase to about 48.57% under Mr. de Blasio's proposal. Read More