A 1099 real estate agent in Indiana pays a flat 2.95% state tax on net profit, stacked on federal income tax and the 15.3% self-employment tax a W-2 employer would have split with you. Indiana’s flat rate fell to 2.95% for 2026, but every county adds its own income tax of roughly 1% to 3%, and every dollar of mileage, MLS dues and marketing you document on Schedule C cuts all three bills at once.