This guide is an overview of registering your business for Indiana state payroll taxes. For more support, contact the state agency directly.
This guide includes key payroll tax requirements, links to state agency portals, and instructions for granting third-party access to Wave's partner. These steps are required to complete your tax profile in Wave so we can manage your payroll tax payments and filings on your behalf.
Tax requirements
To pay employees in Indiana, you may need to register for the following taxes:
Indiana state Income Tax Withholding and Unemployment Insurance (UI) Tax
The Income Tax Withholding and Unemployment Insurance Tax use one registration portal.
- Tax agencies: Indiana Department of Revenue (DOR) and Department of Workforce Development (DWD)
- Registration Portal: Register at INBiz
During registration, be sure to register for both the Department of Revenue and the Department of Workforce Development. After registering, go to https://uplink.in.gov/ESS/ESSLogon.htm to set up your DWD Account.
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Account number Formats:
- Withholding Tax ID Format: 10-digit numeric. For example, 1234567890
- SUI Account Format: Typically 9 digits. For example, 123456789
You also need to grant Wave's partner third-party access.
Local municipality taxes
County Income Tax
- Tax agency: Indiana Department of Revenue (DOR)
- Agency website: https://www.in.gov/dor/
You don't need to register separately. Your state Income Tax ID is also used for County Income Tax reporting.
Third-Party Administrator (TPA) access
UI TPA access
To authorize Wave's partner as your Third-Party Administrator (TPA) for UI filings:
- Log in to https://uplink.in.gov/ESS/ESSLogon.htm.
- Go to Maintain Account > User Information.
- Expand the External Account Authorizations (Agent) section.
- Click Add Agent
- Leave business name blank
- Enter Agent ID: 120389
- Click Next, select Wage Records under Authorization.
- Check the acknowledgment box and submit.
Complete your payroll tax profile
After completing your registration steps, complete your payroll tax profile. Be sure to update your account with your:
- Indiana Taxpayer Identification Number (for income and local withholding)
- Indiana SUI Account Number
Additional Support
For help with your tax account, registration, or technical errors, contact the state agency directly:
- INBiz Customer Support: (317) 234-9768
- Department of Revenue: (317) 232-2240
- Small Business Help Center
- Uplink Help Desk: Accessible via Uplink portal
- INTIME: https://intime.dor.in.gov/eServices/_/#5
- Business Owners Guide: https://www.in.gov/core/business_guide.html
- IN Department of Workforce Development Resources