Licensing is straightforward and inexpensive. A commercial applicator license is required to apply pesticides for hire, and for government employees who apply pesticides in the course of their work. The license runs $35, is valid for two years, and renews by February 28 of the expiration year. Certification comes first: every commercial applicator passes the Category G general core examination, plus each additional category matching the work.
The categories tell you what South Dakota expects a pest control business to be doing. Category 8, industrial, institutional, structural and health related, covers work in and around food handling establishments, human dwellings, institutions and industrial buildings, including rodent and bird control in structures. Category 4 is ornamental and turf. Category 14 is non-soil fumigation, and it is written broadly enough to cover buildings and enclosed spaces, commodities stored in grain bins or in transit, and rodent burrows. Category 15 is wood preservative. Category 9 is public health, category 12 is rodent control, category 13 is sodium cyanide predator control, and category 17 is aerial. Categories 12 and 13 exist because prairie and rangeland vertebrate work is real business here, and they are not categories you will find in most states.
Recertification comes every two years through in-person classes or approved online courses, and the certification has to be current before the license is issued or renewed. Applicator records are required by rule, and in a state with no insurance filing they carry more weight than usual, because the record of what was applied, where, when and at what rate is the primary document in any dispute.
The absence of a state insurance requirement does not mean nobody checks. A commercial customer's procurement department, a national account program, a property management company or a general contractor will all ask for a certificate before you start, and several of them will require additional insured status and a waiver of subrogation. That paperwork is the real licensing hurdle in South Dakota.