North Dakota's top marginal state income tax rate is 2.5%. State tax is progressive here, so most filers pay an effective rate well below the top figure — the calculator applies a blended approximation rather than modeling the full bracket schedule.
Among the lowest top marginal income tax rates of any taxing state. Statewide median household income is $76,000, which is the default loaded above.
Remember that a state with no income tax is not automatically cheaper overall. North Dakota has an effective property tax rate of 0.94% and average homeowners insurance of $2,200 a year — states without wage income tax typically recover revenue through property or sales taxes.