Indiana State Tax Rate 2025. Indiana has a 4.9 percent corporate income tax rate. The personal adjusted gross income tax is imposed at the following rates:
The indiana tax calculator will let you calculate your state taxes for the tax year. Under current law, if all triggers are met, the rate would be reduced to 3.1 percent in 2025 and 2026, 3 percent in 2027 and 2028, and 2.9 percent in 2029 and beyond.