Wisconsin Payroll Taxes: 2026 Employer Guide
Quick Facts
Key payroll tax details at a glance.
State Income Tax
Progressive (up to 7.65%)
SUI New Employer Rate
3.05% (payroll < $500K) / 3.25% (payroll > $500K)
SUI Wage Base
$14,000 per employee
SUI Rate Range
0.05% to 12.0%
Employee SUI Contribution
No
Local Taxes
No
Overview: Wisconsin Payroll Landscape
Wisconsin has a four-bracket progressive income tax with a top rate of 7.65%. The state does not have local payroll taxes, which simplifies compliance. The SUI wage base of $14,000 is moderate, though the rate range is one of the widest in the country (0.05% to 12.0%).
Wisconsin uses different new employer SUI rates based on payroll size: 3.05% for employers with payroll under $500,000 and 3.25% for larger employers. The state recently widened its second-lowest income tax bracket, providing some tax relief for middle-income earners.
This guide breaks down each of Wisconsin's employer obligations: registration requirements, 2026 tax rates and wage bases, filing deadlines, and the compliance pitfalls that catch expanding startups off guard. Whether you're hiring your first Wisconsin employee or managing a growing remote team, everything you need to stay compliant is here.
Wisconsin State Income Tax
Withholding rates, brackets, and forms.
Tax Type
Progressive
Top Rate
7.65%
Withholding Form
WT-4
Wisconsin Unemployment Insurance (SUI)
Employer rates, wage bases, and contribution details.
New Employer Rate
3.05% (payroll < $500K) / 3.25% (payroll > $500K)
Wage Base
$14,000 per employee
Rate Range
0.05% to 12.0%
Employee Contribution
—
Wisconsin SUI (State Unemployment Insurance) is an employer-paid tax that funds unemployment benefits for workers who lose their jobs. It is administered by the Wisconsin Department of Workforce Development. Registration: Employers must register with the Wisconsin Department of Workforce Development as soon as they hire their first Wisconsin employee. Registration can be completed online.
Wisconsin Compliance Checklist
Deadlines, filing requirements, and official resources.
Key Deadlines
Withholding deposits
Due Varies by liability
Quarterly returns (Q1)
Due April 30
Quarterly returns (Q2)
Due July 31
Quarterly returns (Q3)
Due October 31
Quarterly returns (Q4)
Due January 31
Annual reconciliation
Due January 31
W-2 state copies
Due January 31
New hire report
Due Within 20 days of start date
How Warp Handles Wisconsin Payroll
Warp is the only AI-native HR & Payroll platform built for ambitious companies. Instead of clicking through clunky dashboards or Wisconsin's .gov websites for taxes, Warp's AI agents open your Wisconsin tax accounts, file every payroll form, and resolve every tax notice automatically.
What Warp handles for Wisconsin employers:
- Wisconsin tax account registration and setup
- Automated income tax withholding calculations and deposits
- SUI registration and quarterly filings
- Annual W-2 and reconciliation filing
- Tax notice resolution directly with Wisconsin agencies, so you never spend hours on hold
Every Warp customer gets a dedicated Account Manager and Benefits Advisor included to guide them through payroll setup, multi-state expansion, and benefits selection. You'll never visit a government website, negotiate with tax agencies, or pay an accountant $150 per quarterly filing.
If you don't want to deal with navigating Wisconsin .gov portals, check out a demo of Warp to see how we can help you stop worrying about compliance and get back to building.
Tax data last verified: March 12, 2026