Michigan pesticide license for lawn care: certification plus a business license

Michigan's company license is the slow step. Plan for four to six weeks for the business license after the certification is in place, and note that MDARD takes checks and money orders, not cards. The Michigan Department of Agriculture and Rural Development (MDARD) says on its business license page that an applicator's certification does not let you legally run a business that applies pesticides for hire.

Certified or registered: pick for each person

MDARD's certification FAQ describes two credentials for people who apply pesticides for hire.

A certified commercial applicator is 18 or older, passes the Core exam and at least one category exam, and sends MDARD the application with a $75 fee. Lawn work is category 3A, Turfgrass Pest Management. Shrubs, evergreens and shade trees are 3B, Ornamental Pest Management, per the business page's category list.

A registered applicator passes the Core exam, completes a training program run by an MDARD-approved trainer, and sends a $45 fee. Registered applicators can only apply general-use pesticides. The trainer needs a current commercial certification in the category, two years of experience and a pass on MDARD's Train the Trainer exam. A new hire can apply general-use products for two weeks under direct supervision while in the approved program, once MDARD has the notification form.

For an owner-operator spraying alone, certification is the simple route. For a crew, the registered route saves exam time but puts the training program on you.

Exams, and where to sit them

Exams are closed book, true/false and multiple choice, and 70% passes. The FAQ points to the Michigan State University Pesticide Safety Education Program for study manuals. Some manuals are also at county MSU Extension offices, so call before you drive.

Metro Institute proctors the exams, at a test center or remotely, and charges its own fee: $55 per exam at a center and $65 for a remotely proctored one. That fee is separate from MDARD's $75. MDARD itself proctors the Core exam on a paper schedule that follows a Michigan State core review, and the renewal page says the 4-hour review is mandatory for the paper exam.

The timing rules:

• A first-time applicant has 6 months from filing the application to pass every category on it. After that, you refile and repay.
• MDARD accepts a passing score for 1 year.
• You can take one attempt per category per day, with no cap on retakes.

Exam 6J combines 3A, 3B and category 6, right-of-way, into a single test, so passing it certifies you in all three. No credential is issued until every category on your application is passed.

The business license

The MDARD business page lists what goes in the envelope, with fees as the page stated them on 2026-10-01:

• the signed application and the $100 fee, which is also the renewal fee;
• a certificate of liability insurance;
• proof that you are a certified applicator or employ one whose credentials cover the categories you are applying for;
• for a sole proprietor, a DBA certificate from each county where you work; for a company, the corporation ID number and any assumed name certificates.

A brand-new firm, or an existing firm adding a license category, also files a notarized letter of experience, signed by the person with the experience. The page asks for at least one of two things: two application seasons as an employee of a commercial applicator, or comparable education and experience as the director determines; or a bachelor's degree in a discipline that covers pests and pest control plus one application season as an employee of a commercial applicator. Call or submit the experience first for tentative approval if you are unsure.

The license expires every December 31 and renews on the same terms as a new one. The page warns that bidding on contracts or advertising pesticide services after December 31 without a renewed license is a violation.

What the insurance has to look like

MDARD wants a certificate of liability insurance showing the licensee's current legal name and address as the insured, effective and expiration dates, and the limits. For lawn categories 3A and 3B the minimums are $100,000 for bodily injury per occurrence and $25,000 for property damage per occurrence. Aerial, fumigation and right-of-way work needs a $300,000 combined single limit.

You must keep the insurance in force during the license period, and you are responsible for sending MDARD a new certificate when the old one expires. An expired policy is one of the listed reasons a license can be held up, and so is a certificate that doesn't match MDARD's list, so check yours before you mail the application. The chemical-damage endorsement is in the pesticide applicator insurance guide, the paperwork is in the certificate of insurance guide, and the pesticide applicator license by state page sets Michigan beside the rest.

Renewal every third year

Certification and registration expire every third year on December 31, and MDARD mails a renewal application in October. The renewal process page gives two ways to renew a commercial credential: eight seminar credits per category, Core included, or retaking the exams. A lawn applicator certified in Core and 3A needs 16 credits over three years. Credits are category specific and do not carry over to the next period. The renewal fee is the same $75 as the initial one, and the renewal window runs for one year after expiration.

On fertilizer alone, MDARD's pages are silent about a Michigan license. They mention no practice test and name no late fee for the business license. Its page links a list of licensed businesses and an applicator credential lookup, neither of which we opened.

The renewal page also lists reciprocal agreements with Indiana, Minnesota, Ohio and Wisconsin: if you live in one of them and are certified there, MDARD can grant certification without an exam.