• Residence-based: Indiana county tax is based on where the employee lives, not where they work.
• Form WH-4: Employees declare their county of residence on Form WH-4 for proper withholding.
• Combined withholding: County tax is withheld with state income tax using Indiana DOR withholding tables.
• Rate changes: Counties can change rates, typically effective January 1. Check DOR for current rates.
Indiana DOR publishes the complete list of all 92 county tax rates, updated annually.
View all county rates at Indiana DOR →