Wisconsin Payroll Tax Registration

Withholding account (Business Tax Registration)

Wisconsin Department of Revenue (DOR)

Typical wait:

1 to 2 business days by email (paper certificate in 7 to 10 business days)

You'll receive:

A 15-digit withholding number (shown as 036-0000000000-00), usually by email.

Send Unify:

Your withholding number.

Unemployment insurance account (New Employer Registration)

Wisconsin Department of Workforce Development (DWD)

You'll receive:

A 10-digit UI account number. The 2026 new-employer rate is 3.05% (3.25% if your payroll is $500,000 or more), on the first $14,000 of each employee's wages.

Send Unify:

Your UI account number and your rate notice.

Construction employers start at 2.50% (2.70% at $500,000+ payroll). DWD says its UI Employer Portal will require a MyWisconsin ID login starting in fall 2026.