Delaware's top marginal state income tax rate is 6.6%. 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.
No sales tax and low homeowners insurance premiums. Statewide median household income is $82,000, which is the default loaded above.
Remember that a state with no income tax is not automatically cheaper overall. Delaware has an effective property tax rate of 0.58% and average homeowners insurance of $900 a year — states without wage income tax typically recover revenue through property or sales taxes.