Wisconsin
Last Updated June 18, 2026
Wisconsin employers must manage withholding taxes, unemployment insurance, and payroll reporting obligations. Use these resources to access employer registration tools and agency information.
State Tax Guidelines
Wisconsin Department of Revenue – Withholding Tax
Agency Information
Add to existing company setup
Submit a request to your service team to add WI (withholding) to your company setup. Please include the below with your request:
- Withholding – Withholding account number and Deposit Frequency. If you’re unsure of your deposit frequency or account number you can call the agency at 608-266-2776.
- Power of Attorney – POA is required, please obtain the prefilled form from your client service representative.
Register a new company
Employers can register online at https://www.revenue.wi.gov/Pages/Businesses/New-Business-home.aspx. Follow the prompts to register your business. Once completed you will receive your account number and deposit frequency within 24 hours.
Power of Attorney
Power of Attorney is required, please obtain the prefilled form from your client service representative.
Wisconsin Department of Workforce Development, Division of Unemployment Insurance – Unemployment tax
Agency Information
Add to existing company setup
Submit a request to your service team to add WISUI (unemployment) to your company setup. Please include the below with your request:
- Unemployment – Account Number and Tax rate. This can be found on a Tax Rate Notice or the Quarterly contribution report. If you’re unsure of your tax rate or account number, you can call the agency at 608-261-6700.
- Power of Attorney – POA is required, please obtain the prefilled form from your client service representative.
Register a new company
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