State Income Tax Across the Map

Seven states have no state income tax. Of the 43 states with a state income tax (and the District of Columbia), the top marginal income tax rate ranges from 2.5% to 13.3%. Most states (and D.C.) with an income tax have multiple tax brackets with graduated rates; 14 states have only a single tax rate. New Hampshire only taxes interest and dividends, and Washington only taxes capital gains.