How to Get a Pesticide License in Ohio

In Ohio, the Ohio Department of Agriculture (ODA) licenses pesticide applicators. Which license you need depends on who owns the land and whether you are paid to spray.

Both paths end in an exam: a Core exam plus at least one category exam. The fees are small, but the order of the steps and a few deadlines are easy to miss.

This guide follows ODA, Ohio State University (OSU) Extension and the Ohio Revised Code. This site is an independent practice test site and is not affiliated with ODA or OSU.

In short

Commercial applicators pay $35 per year. Private applicators pay $30 for three years.¹²
You pass the Core exam and at least one category exam. Seventy percent is the passing score.³
After a failed exam you wait at least five business days to retake it.³
Commercial licenses renew every September 30, private licenses every third March 31.³²
ODA lists a minimum age of 18, and OSU says that from January 1, 2027 you must be 18 to take the exam.⁴⁵

Contents

Which license do you need?
The steps in order
The exams
What it costs
Renewal and recertification
The 2027 age rule
Common questions
Sources

Which license do you need?

A commercial applicator license is required if you apply pesticides to the property of another for hire, work for a government agency, or apply at sites such as schools, parks, golf courses, restaurants, medical buildings and larger apartment complexes. It is also required for wood-destroying insect inspections in real estate transactions.³

A private applicator license is for farmers. You need it to buy or apply restricted-use pesticides on land you own, rent or are employed to work on to produce an agricultural commodity, including grain bins, ponds and livestock areas on a farm.²

There is a third group that needs no license: a trained serviceperson works under the direct supervision of a licensed commercial applicator at the same company or agency, after training from the employer.¹ Businesses need their own license too, with proof of liability insurance, but no exam.¹

The steps in order

Commercial applicator

Send the ODA application with the $35 fee.¹
Get the study materials for Core and your category from OSU Extension Publishing, and study them.³
Register with ODA for an exam date and location online or by calling 614-728-6987. Space is limited, so register ahead.⁶
Take Core and at least one category exam. You have up to one year after applying to pass.⁶
Check your results on the ODA website (OSU says 2 to 4 weeks) or wait for the mailed notice. When you pass, ODA mails the license.⁶³

Private applicator

Study the private Core materials and the category for your crops.²
Register with ODA for an exam and take Core plus one category.²
ODA sends a license application with your results. Return it with the $30 fee and ODA mails the license.²

Bring photo ID to the exam. The exams are not open book, and walk-ins who did not register may have to wait or may not be admitted.⁷

Note the different order: commercial applicants apply and pay first, private applicants pay after passing.

The exams

The exams are multiple choice. OSU states that each exam has 25 to 150 questions, depending on the category, and that most include a pesticide label that comes with the exam.³ We did not find a published question count or time limit for the Core exam alone, so we do not quote one.

Commercial applicators choose from 26 categories, each tied to an application site such as agronomic crops, turf, ornamentals or general pest control.³ Private applicators have seven, from grain and cereal crops to fumigation. Category 7, specialty uses, has no exam beyond Core.²

If you fail, you may retake as often as needed, but only the exams you did not pass, and you wait at least five business days.³¹ Our guide to the Core exam lists the topics.

What it costs

Item	Amount
Commercial applicator license	$35 per year¹
Private applicator license	$30 for three years²
Business, solicitation, registered location, dealer	$35 each¹
Study materials	Priced by OSU Extension Publishing

ODA's private application form says exams are currently free to take.⁷ The Ohio Revised Code still mentions an examination fee of $30.⁸ Fees can change, so ask ODA at 614-728-6987 what you owe when you register.

Renewal and recertification

The commercial license expires each September 30. ODA mails a renewal letter in July, and you renew by mail or online.³ The private license expires every three years on March 31, with a letter in December of the last year.²

Besides the fee, you must recertify every three years. Commercial applicators need 5 hours of credit, private applicators 3 hours, or you retake the exams.³² See our guide to recertification for the split by Core and category.

The 2027 age rule

ODA's commercial and private license pages both list "be at least 18 years old" among the requirements.⁴ OSU's private applicator testing page adds that after January 1, 2027, you must be 18 years old or older to take the exam.⁵ If you are under 18 and plan to test, confirm with ODA what applies to you now.

Common questions

Do I need a license to spray my own lawn?

The commercial license applies to pesticide use for hire, for government agencies and at the listed public sites. A homeowner treating their own yard is not in that list.³

How long do I have to pass after applying?

Commercial applicants have up to one year after applying to pass their exams.⁶

Can I use a license from another state?

You may qualify for a reciprocal commercial license without the Ohio exam. Contact ODA for the list of states.³

Can I use a drone under a private license?

No. Drone applications need a commercial license with category 1, aerial pest control.²

Sources

Fees, steps and deadlines come from ODA's partner pages at OSU and the Ohio Revised Code. Rules change, so confirm with ODA before you pay. This site is independent and is not affiliated with ODA or OSU. The license is issued by ODA.