Wisconsin Contractor Taxes and Licensing: Real Property Work, Lawn Care and DSPS Credentials

In Wisconsin, a contractor constructing, installing, repairing or servicing real property is the consumer of the materials: it pays tax on them and doesn't charge the customer sales tax. Repairs to tangible personal property and landscaping and lawn maintenance are taxable services. The state rate is 5%, plus county and Milwaukee city taxes.

Do Wisconsin contractors charge sales tax?

Not on real property work. The Wisconsin Department of Revenue says "the contractor is a consumer when constructing, installing, repairing or servicing real property," and "the contractor's charge to the customer is not subject to tax." Notice that Wisconsin includes repairing and servicing real property in that rule. That's a key difference from Iowa, which taxes many building repairs, and from Illinois, which uses a separate service occupation tax for repair work.

The catch is anything that isn't real property. The department's taxable services list includes "repair and service of tangible personal property" and "landscaping and lawn maintenance services." A plumber repairing a water line in a wall is working on real property; an appliance repair tech fixing a freestanding refrigerator is repairing personal property. A landscaper mowing lawns is selling a taxable service.

Publication 207, the department's guide for contractors, covers edge cases such as items that may or may not become real property. See also sales tax on labor vs. materials.

Materials, use tax and Wisconsin's local rates

As the consumer, "the contractor pays tax on materials purchased and used in performing the real property activity." If a supplier didn't charge Wisconsin tax, you owe use tax yourself; see use tax for contractors.

The state rate is 5%. "Seventy Wisconsin counties have adopted a 0.5% county tax." Milwaukee is the outlier: "beginning January 1, 2024, Milwaukee County imposes a 0.9%" county tax, and the city of Milwaukee imposes "a 2% city sales and use tax." That matters both for what you pay on materials and for what you charge on taxable lawn care or repair services. Look up the rate for an address with the department's rate tool.

Wisconsin contractor licensing (DSPS)

The Wisconsin Department of Safety and Professional Services (DSPS) issues most construction credentials. For home builders and remodelers, the key pair is the Dwelling Contractor credential, held by the "owner, partner, or chief executive of a contracting business" that pulls permits on one- and two-family dwellings, and the Dwelling Contractor Qualifier, an individual credential. The Dwelling Contractor credential requires either a $25,000 bond or general liability insurance of $250,000 per occurrence.

For a general look at state vs. local licensing, see contractor license.

Wisconsin income tax rates for 2026

Wisconsin's 2026 Form 1-ES instructions list four individual brackets:

Corporations pay a 7.9% franchise or income tax, and an economic development surcharge applies to businesses with gross receipts of "$4 million or more." Pass-through owners usually make quarterly estimated payments; see quarterly estimated taxes for contractors and the quarterly estimated tax calculator.

When Wisconsin requires workers' comp

The Department of Workforce Development says you must carry workers' comp if you "employ 3 or more full-time or part-time employees" or "pay gross wages of $500 or more in any quarter for 1 or more employees for work done in Wisconsin." The $500 test catches most small crews: one part-time helper paid more than $500 in a quarter triggers it. Background: workers' compensation.

Local taxes in Wisconsin

• County sales tax: 0.5% in seventy counties; 0.9% in Milwaukee County.
• City sales tax: 2% in the city of Milwaukee.
• Local permits: municipalities issue building permits and enforce codes, even where DSPS credentials apply.