Register in Wisconsin
Wisconsin tax agencies
- Wisconsin Department of Revenue (DOR) - income tax withholding
- Wisconsin Department of Workforce Development (DWD) - unemployment tax
Set up an existing company
If you've run payroll in Wisconsin previously, you can find your Withholding Account Number on the form WT-6 withholding coupon or on the welcome letter labelled "Filing Number" sent by the WI DOR. If you're unsure, you should call the agency at (608) 266-2776.
You can find your Employer UI Account Number on the latest tax rate notice or Quarterly Wage Report (Form UCT-101) sent to you by the WI DWD. You can also call the agency at (608) 261-6700.
Unemployment Insurance Tax Rate: Business that have previously run payroll in WI can find their Unemployment Insurance Tax Rate on your most recent tax notice from the DWD. Please only enter in the total rate, which generally ranges from 0%–12%. If you're unsure of your rate you can call the agency at (608) 266-2776.
Register a new company
Income tax withholding
Register with the Wisconsin Department of Revenue online to obtain your Withholding Account Number. You should receive your Withholding Account Number in 24 hours after registering online, or 3-4 days if registering by mail. Please keep this time frame in mind when planning your first Wisconsin payroll.
Most companies are liable for state unemployment if they pay $1500 in a quarter in any calendar year or have one or more employees per day in 20 or more weeks of any calendar year. You can find out if your company is liable and register online with the Wisconsin Department of Workforce Development. Select Create Logon ID, in order to obtain the Employer UI Account Number and tax rate. You should receive this info instantly after registering online, or in 1-2 weeks if registering by mail.
Unemployment Insurance Tax Rate: If you're a new employer in Wisconsin, your rate will generally be in the range of 3.05%–4.55%. Those in the construction industry or with an annual payroll over $500,000 should review this page to find their rate. If you're unsure of your rate, please call the agency at (608) 266-2776.