2024 Tax Slab Indiana. Learn about indiana's flat state income tax rate, local taxes, and federal withholding. Starting in 2024, indiana will reduce its personal income tax rate from 3.23% to 2.9% over four years, without any budget condition.
Learn how to make estimated tax payments for indiana income tax, due dates, methods, penalties, and exemptions. Learn about indiana’s flat state income tax rate, local taxes, and federal withholding.