Alabama's top marginal state income tax rate is 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.
One of the lowest effective property tax rates in the country. Statewide median household income is $62,000, which is the default loaded above.
Remember that a state with no income tax is not automatically cheaper overall. Alabama has an effective property tax rate of 0.4% and average homeowners insurance of $2,100 a year — states without wage income tax typically recover revenue through property or sales taxes.