How to start a lawn care business in Wisconsin: tax, DATCP licenses and the phosphorus rule

This page covers only what changes when you start a lawn care company in Wisconsin. For the basics of routes, mowers and pricing, read the national lawn care startup guide. For entity, insurance and licensing rules for every trade in the state, see our Wisconsin startup page. Wisconsin is unusual because it taxes lawn work, has a real-time notice registry for neighbors, and bans most phosphorus on lawns.

Lawn maintenance is taxable, and the invoice has to show the split

The Wisconsin Department of Revenue explains this in Publication 210. It says the sale of landscaping and lawn maintenance services, including any property handed to the customer with the service, is subject to sales and use tax unless an exemption applies. The list of taxable work includes planting, weeding, edging, spraying, fertilizing, thatching, raking and mowing lawns, plus laying sod. Its own example: a company charges $100 to fertilize and spray for weeds, labor and materials included, and the whole $100 is taxable. A sod job billed as $100 of sod and $200 of labor is taxable as a $300 total.

The same publication lists plowing or removing snow among services that are not landscaping services. A company that mows in summer and plows in winter therefore taxes one season and not the other. Publication 210 also covers mixed jobs. If one invoice has taxable lawn work and nontaxable real property work, it says you must indicate the taxable and nontaxable portions on the invoice, and charge tax on the taxable part. Build separate line items in your invoicing software before the first bill goes out.

Your purchases follow a pattern. The department says you can buy fertilizer and other property that you physically pass to the customer without tax by giving the supplier a completed resale exemption certificate. Machinery and equipment, including tools, are taxable when you buy them. Sales tax also includes the 0.5 percent county tax where it applies, and the publication says lawn services are sourced to where the customer receives them. That means the rate follows the lawn, not your shop address. Publication 210 carries a 3/12 date (its rate-change banner has since been updated through 2025) and says later laws or court decisions may change its examples, so check the department's current rate chart and ask before relying on an edge case. Our state-by-state sales tax guide shows how Wisconsin compares with other states.

Spraying for hire takes a DATCP business license and licensed applicators

Mowing is not a credentialed profession in Wisconsin. The Department of Safety and Professional Services A-Z professions list has no entry for lawn care or mowing. Pesticides change that. Under Wis. Stat. 94.703, no commercial application business may operate in the state without a license from the Department of Agriculture, Trade and Consumer Protection (DATCP). DATCP's lawn care page says the license is required for any business that makes for-hire pesticide applications, and that every applicator you employ needs an individual commercial applicator license and certification in the right category. On DATCP's business license form, the category for lawns is 3.0 Turf and Landscape.

Two details on the form matter to small owners. First, DATCP says a business that gets paid for pesticide work, or advertises it, is a commercial application business, and an independent contractor who applies for that business must be licensed too. Hiring a licensed friend to spray under your brand does not remove your own license requirement. Second, the form says you complete one application for each business location.

DATCP's fee page in October 2026 lists these as the totals that first take effect January 1, 2027, and ties the surcharge portion to the balance in the state's agricultural chemical cleanup fund, so the totals can move again. If you plan to manufacture or distribute fertilizer, DATCP also has a separate annual fertilizer business license ($30 base fee, listed at $50 with the cleanup surcharge for July 2026 through June 2027). Buying fertilizer and applying it to a customer's lawn per the label is exempt from that license, according to DATCP.

Neighbors can sign up for 12 hours of advance notice

Wisconsin runs a Landscape Pesticide Registry. Residents can register addresses on their own block or an adjacent block, for free, and must renew each year. DATCP says commercial landscape applicators treating lawns, trees or shrubs on nearby property must notify registrants at least 12 hours before the application. For the 2026 season, registration ran from November 1, 2025 through February 1, 2026, and the notice requirement began March 15, 2026. DATCP reported about 3,900 registered addresses for 2025. The registry covers commercial landscape work only. It does not reach homeowners spraying their own yards, work inside or outside buildings, or farm use.

For a crew, this is a scheduling task. Pull the registry list before your first spring route, build the 12-hour call or message into the day before each application, and keep a log of who was told and when. Weather delays then become a customer-service step rather than a compliance problem.

The phosphorus rule limits what goes in the spreader

Wis. Stat. 94.643 restricts turf fertilizer statewide. Turf means closely mowed, managed grass, including residential lawns, and excludes pasture and sod farms. Under sub (2) of that statute, no one may intentionally apply fertilizer labeled as containing phosphorus or available phosphate to turf, with two exceptions: establishing grass from seed or sod during the growing season when establishment began, or a laboratory soil test within the prior 36 months showing the soil is deficient in phosphorus. The statute also bars applying fertilizer to frozen turf and intentionally applying turf fertilizer to impervious surfaces. Accidental drops on a driveway have to be removed immediately.

The statute sets a forfeiture of up to $50 for a first violation and $200 to $500 for later ones. Practical steps: stock zero-phosphorus products for routine programs, keep the customer's soil test report in the job file for any exception, and keep a blower in the truck for walks and drives. Your fertilizer program for a neighbor with a new seeded lawn can differ from the one on the lot next door, and the records are what show why.

Workers' comp starts earlier than you may expect

The Department of Workforce Development lists two triggers. You must carry coverage if you employ three or more people, full or part time, and you must have insurance the day you hire the third. You must also carry it if you employ one or more people and pay combined gross wages of $500 or more in a calendar quarter for work in Wisconsin, with coverage in place by the 10th day of the first month of the next quarter. A single seasonal mower paid for a few weeks of May can cross that line. Price it into your first-hire plan, and read our guide on hiring your first employee before the first paycheck.

Forming the company

Wisconsin LLCs file with the Department of Financial Institutions (DFI), not a Secretary of State. DFI's fee page lists articles of organization at $130 online or $170 on paper, and the annual report at $25 online or $40 on paper. That is the whole state-level cost of a basic LLC. Our LLC fee comparison puts those numbers next to every other state. Confirm both fees on DFI's page before you file, since the table is easy to misread.

What to do first

1. Decide whether you will apply anything beyond fertilizer you buy at retail. If you will spray, start the DATCP license and applicator certification before spring.
2. Register with the Department of Revenue for a seller's permit and set up separate invoice items for taxable lawn work and nontaxable snow plowing.
3. Collect resale certificates and send them to your fertilizer supplier so you do not pay tax on products you pass to customers.
4. Choose phosphorus-free products as the default, and keep soil tests on file for exceptions.
5. Run payroll through a system that flags the $500 quarterly total before you hire.

A fast reply to estimate requests also helps in a short season. Our website service page explains how a lawn care site and an answered phone work together to book routes before the first mow.

Verify with the state before acting

The facts above come from the Wisconsin sources listed below, read in October 2026. They are general information and not legal or tax advice. DATCP surcharges, registry dates and county tax rates move from year to year, and a city or village may license businesses on its own terms, so confirm with the agency first.

Frequently asked questions