Missouri contractor licenses: what the state requires and what your city decides

Missouri leaves most trade licensing to the places where the work happens. That makes the question "do I need a license in Missouri" the wrong one to ask. The useful question is which city or county you are working in, and then what that office wants. This page covers the part the state itself controls, which is short, and shows where the rest sits. It is general information, not legal advice, so confirm with each agency before you bid.

What Missouri licenses at the state level and what it leaves to cities

The Division of Professional Registration keeps a list of its boards. As of October 2026 that list includes accountancy, architects and engineers, cosmetology, interior design, real estate, and an Electrical Contractors office. It has no board for general contractors, plumbers, HVAC technicians, roofers, painters or home inspectors. The other state programs that touch home-service work sit in the Department of Agriculture (pesticides) and the Department of Health and Senior Services (onsite wastewater).

The Division's list is the check to run on any trade not covered here. If an occupation has a state board, it appears there. If it does not, assume a city or county may still regulate it.

Electrical: a statewide license you can choose, with limits on what cities can ask

Missouri started accepting statewide electrical contractor applications on July 1, 2019, under RSMo 324.900 to 324.945. The Office of Statewide Electrical Contractors states in its FAQ that the license is "optional, not mandatory." If you only work where you already hold a local license, or where no license is required, you do not have to get it.

The reason to get one is portability. The license belongs to a qualifier, a supervisor on your payroll, and it is recognized by every city and county. Under RSMo 324.925 a city cannot require a statewide license holder to take a local exam or meet special proficiency requirements, although it may still ask for an ordinary business license. A city that refuses to honor the license can lose its state sales tax distributions, and you can file a complaint with the office.

• Insurance: $500,000 in liability coverage. If your city requires a bond, you keep posting it with the city and send the state proof.
• Exam and experience: a nationally accredited, NEC-based exam from an independent testing agency, plus 12,000 hours of verifiable practical experience. Local exam-based contractor or master licensees can qualify through the statute's grandfathering path, including six of the previous eight calendar years of licensure.
• Fees: the office's fee page, effective June 30, 2019, lists $200 for the application and $100 for triennial renewal. The 2019 FAQ projected a $200 renewal, so use the fee page and confirm before paying.
• Other states: the statute has no reciprocity language. The office says an out-of-state license that required an exam and verified hours may count toward the testing and experience requirements.
• Permits: the state does not issue electrical permits or inspect work. You still pull permits from the local office.

Pesticides: the state license that catches lawn and pest crews

The Missouri Department of Agriculture licenses anyone who applies pesticides on other people's property for pay. For a mowing company, the trigger is a weed-and-feed or fertilizer-with-herbicide program. Ornamental and turf work is Category 3, general structural pest control is 7A, and termite work is 7B.

• Commercial applicator: pass the CORE exam and at least one category exam at Pearson VUE. The license is $65 and renews annually, with a 60-day grace period and a 25 percent late penalty, as listed by the department in October 2026. Certification must be renewed every three years.
• Insurance or bond: under RSMo 281.065, the department will not issue a commercial applicator license until you or your employer shows a surety bond or liability insurance of at least $50,000 per occurrence. The statute allows a deductible of up to $1,000.
• Pesticide technician: a worker who applies general use products in Category 3, 7A or 7B under a certified applicator's direct supervision needs a technician license. There is no exam, only approved training for each category. The fee is $35 per year. The supervisor must work for the same business, at the same location, and hold the same categories.
• Termite and structural categories: applicants for 7A, 7B or 7C must show education or experience, such as an associate degree in biology, chemistry, agriculture or entomology.

Our pest control license guide covers how the exam route works across states.

Septic and onsite wastewater: voluntary at the state level

RSMo 701.040 directs the Department of Health and Senior Services to run a voluntary registration program for onsite sewage contractors, implemented by approved county programs where counties have one. A DHSS course page lists a three-day Basic Installer course in Jefferson City with a $300 pre-registration fee, which includes a $90 non-refundable processing fee, followed by an exam. Because a county can set its own requirements, ask the county health office before you quote a system.

Trades with no state license, and what you still need

Mowing, residential cleaning, pressure washing, gutter cleaning and junk removal do not appear on the Division's board list. That does not make them paperwork-free.

• City business license: the electrical office's FAQ confirms cities may require a business or occupation license from any contractor, so call the city clerk or finance office.
• Workers' comp: the Division of Workers' Compensation says employers need coverage at five or more employees, and construction employers at one or more. A pressure washing or gutter crew may fall under the construction definition, which covers erecting, demolishing, altering or repairing improvements.
• Sales tax: Missouri's taxable services list, per the Department of Revenue, does not name cleaning, mowing or repair labor, but products you sell are taxable. Register with the Department if you sell parts or materials.
• Fictitious name: the Secretary of State charges $7 to register one, as listed in October 2026.

Painters should also know the federal EPA rule. The Renovation, Repair and Painting program requires certification for anyone paid to disturb painted surfaces in homes built before 1978, including sole proprietors. It applies in every state.

What to do before you bid in a new Missouri city

1. Search the Division's board list for your occupation.
2. Call the building or permit office in the city and the county, because unincorporated areas follow county rules.
3. Ask what local exam, bond and insurance the city requires, and whether it accepts the statewide electrical license.
4. Confirm that a pesticide or sales tax registration is not hiding inside a service you added.

Our Missouri startup page covers formation fees, sales tax and call recording. The licensing boards table compares all 50 states. Licensing rules change, so this page reflects what the named agencies published in October 2026. Confirm with the agency before relying on any figure.

Frequently asked questions