State income taxes vary significantly across the United States. Some states like Texas, Florida, and Washington have 0% state income tax, while others like California and New York have high progressive tax rates.
No Income Tax States
Alaska, Florida, Nevada, New Hampshire, South Dakota, Tennessee, Texas, Washington, and Wyoming currently do not levy a state income tax on wages.
Flat vs Progressive Tax
Some states (like Pennsylvania, Illinois, North Carolina) have a flat tax rate, meaning everyone pays the same percentage regardless of income. Others (like California, New York) have a progressive tax system, where higher earners pay a higher percentage.