Louisiana's top marginal state income tax rate is 4.25%. 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.
Homestead exemption is generous, but flood and wind insurance is costly. Statewide median household income is $58,000, which is the default loaded above.
Remember that a state with no income tax is not automatically cheaper overall. Louisiana has an effective property tax rate of 0.55% and average homeowners insurance of $3,400 a year — states without wage income tax typically recover revenue through property or sales taxes.