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Detailed Information for : Withholding Tax, Wisconsin Employer Identification Number
A Wisconsin Employer Identification Number (WEIN) is required for employers who pay wages subject to withholding of Wisconsin income tax or for other persons with a withholding requirement (e.g., third-party payers of sick-pay plan benefits or payers of pension benefits when the recipient requests in writing that Wisconsin income tax be withheld). Only one Wisconsin employer identification number will be issued to an applicant for withholding tax purposes, regardless of the number of business locations.  
License Type:

The BTR certificate is renewable every two years


There is no fee for the Wisconsin Employer Identification Number.  However persons wanting a Wisconsin Employer Identification Number must hold a Business Tax Registration (BTR) Certificate. There is a one-time $20 charge for the BTR Certificate. This certificate is renewable every two years for $10.

Additional Information:
See a list of Frequently Asked Questions  
Application Form(s):
To Apply Directly Online:
Wisconsin Statutes:
Employer Withholding (S. 71.64(1)(a))  
Administrative Rules/Codes:
Withholding Wages (Revenue Tax 2.90)  
Contact Information
Customer Service Bureau
Home Page:
E-mail :
Hours of Operation:
7:45 a.m. - 4:30 p.m., Monday through Friday  
Mail Address:
PO Box 8902, Madison, WI 53708-8902  
Street Address:
2135 Rimrock Road, Madison, WI 53713  
Agency Web Site:
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For additional assistance with business-related license, permit and registration information, visit the Wisconsin Small Business Development Center at or phone them at 608-263-7680.