Indiana Wood-Destroying Organism Licensing Requirements

Subterranean termites and other wood-destroying organisms (WDO) threaten Indiana structures from southern Ohio River hills to central Indiana subdivisions and northwest lakefront housing. The Office of Indiana State Chemist (OISC) at Purdue University does not fold WDO authority into Category 7a - Industrial, Institutional, Structural, and Health Related Pest Management. That category explicitly covers pests other than termites in or around listed structures. Termite baiting, liquid barrier treatments, pretreats, and other WDO pesticide work require Category 7b - Termite Control under 355 IAC 4.

This guide is for operators adding termite lines, real-estate referral partners evaluating vendor credentials, and multi-service firms tempted to route WDO jobs through Category 7a credentials. It explains Indiana's 7b treatment and inspection qualification path, the separate Category 12 wood-destroying pest inspection business track, business licensing, insurance, CCH renewal, and reciprocity boundaries - without inventing WDI report statutes, exam sitting fees, or fumigation category rules not verified in the Indiana facts pack.

Southern Indiana's longer warm season elevates subterranean termite risk where Category 7b matters. Real-estate-driven WDO packages should be mapped to official OISC credentials before taking fees or issuing customer reports.

355 IAC 4 and OISC category materials define Category 7b - Termite Control - as using or supervising pesticides for management of termites and other wood-destroying organisms. Category 7b also qualifies individuals to inspect structures for evidence of termites and other wood-destroying organisms per the Indiana facts pack.

What fits Category 7b. Subterranean termite liquid and bait systems, new-construction pretreats, and other WDO pesticide applications in structural contexts when labels and category scope align.

Individual credential path. Pass Core plus Category 7b, obtain five-year certification (expiring December 31 of the fourth year following qualification per OISC), then obtain the for-hire applicator license tied to the licensed business. Annual applicator license fee is $45. Exam sitting fees were not published on reviewed OISC pages - confirm when scheduling.

Inspection qualification versus Category 12 business track. Category 7b qualifies individuals to inspect structures for evidence of termites/WDO per 355 IAC 4. Category 12 addresses a separate wood-destroying pest inspection business licensing path with distinct insurance wording. Before launching inspection-heavy real-estate business models, read current OISC application forms and confirm whether your entity needs Category 12 business licensing, Category 7b individual certification, or both for the services you intend to sell.

Supervision rules. Registered technicians may apply pesticides under off-site supervision of a licensed applicator, but RT status does not create independent category authority. A supervisor without Category 7b cannot legally oversee Category 7b restricted applications even if the supervisor holds Category 7a for other work.

OISC application materials describe Category 12 - Wood Destroying Pest Inspection - as a wood-destroying pest inspection credential and business track distinct from Category 7b treatment category. The facts pack flags Category 12 scope for confirmation on current OISC materials before advertising - treat Category 12 as a deliberate business decision rather than an automatic extension of Category 7a or 7b.

Separate business credential. Indiana credentials include a Category 12 / Wood Destroying Pest Inspection Business License - a separate business credential path for wood-destroying pest inspection businesses with insurance required. Annual fee is $45 per the Application for Indiana Pesticide Credentials, matching other annual credential fees on the form.

Insurance specific to Category 12. OISC Insurance Requirements state that Category 12 WDI businesses must maintain a minimum $300,000 general liability combined single limit for property damage. This wording differs from the pesticide application business minimum, which requires $300,000 combined single limit for bodily injury and property damage. Policies must be issued in the business name on the license; re-file on expiration. The State Chemist may be listed as certificate holder.

When to evaluate Category 12. Real-estate-driven wood-destroying pest inspection programs, clearance letters, and inspection-heavy business models should be mapped to official OISC forms before taking inspection fees or distributing customer reports. The Indiana facts pack does not verify specific WDI inspection report form statutes or mandatory retention periods for real-estate transactions - confirm any report obligations on official OISC, 355 IAC 4, and applicable real-estate regulatory materials before building compliance templates.

Continuing certification. Category 12 certification renews on the five-year cycle with 10 continuing certification hours (CCH) per five-year period under 355 IAC 4-7-2 and OISC's Continuing Certification Program - or by re-examination. No more than half of required CCHs may be earned at any one training program; excess CCHs do not carry forward.

Indiana operators frequently hold Category 7a for heavy residential and commercial insect and rodent programs. Category 7a scope covers using or supervising pesticides for management of pests other than termites in or around structures such as dwellings, offices, retail, farm structures, restaurants, warehouses, institutions, industrial facilities, and food processing facilities. WDO pesticide work requires Category 7b - not Category 7a.

Common mistake. A firm certified through Category 7a advertises termite baiting because "we already have structural pest certification." OISC category scopes are not interchangeable. The termite exclusion in Category 7a is explicit in 355 IAC 4-backed scope. Enforcement during inspection or customer complaint review will compare advertised services to categories on file.

Multiple categories. Technicians may hold 7a and 7b simultaneously. Each category requires passing that category examination in addition to Core. Category authority and CCH obligations are additive - holding both 7a and 7b means meeting both category CCH totals (20 CCHs for 7a, 15 CCHs for 7b) on the five-year cycle, or using re-exam paths.

General pest versus WDO lines. Category 7a supports interior pest, bed bug, and rodent programs in listed settings - it does not replace Category 7b for termites and WDO, nor Category 12's separate inspection business path. Plan Category 7b before marketing termite treatments.

Category 7b certifies the individual technician to perform WDO pesticide work and inspect for evidence of termites/WDO per OISC materials. It does not replace the Pesticide Business License for for-hire operations - and Category 12 inspection businesses follow their own business licensing path.

Pesticide Business License (PBL). Any person who applies pesticides for hire to the property of another - or who advertises that they do - must obtain a Pesticide Business License from OISC. Prerequisites include employing at least one certified applicator, submitting the application, providing a certificate of insurance meeting OISC minimums, and paying the $45 annual business fee. WDO treatment services sold to homeowners, real-estate agents, property managers, and builders are for-hire pesticide application when pesticides are applied.

Category 12 business layer. Do not assume a standard Pesticide Business License alone covers a Category 12 wood-destroying pest inspection business model. Confirm on OISC Insurance Requirements and the Application for Indiana Pesticide Credentials whether your inspection-only or inspection-plus-treatment entity needs the Category 12 business license path in addition to or instead of standard PBL coverage for your advertised services.

Insurance floors. Pesticide application businesses must maintain minimum $300,000 general liability combined single limit for bodily injury and property damage. Category 12 WDI businesses must maintain minimum $300,000 general liability combined single limit for property damage. Match coverage to WDO and inspection services you perform; performing services excluded from your policy creates business risk even when applicators hold correct categories.

Technician prerequisite. OISC requires at least one certified applicator employed by the business before issuing pesticide business credentials. Owner-operators often earn Category 7b themselves, then apply for the business license with insurance on file.

Indiana WDO licensing flows through OISC's examination-based certification model under 355 IAC 4.

Exam path. Pass Core plus Category 7b (and Category 12 if that path applies). Certification is valid five years, expiring December 31 of the fourth year following qualification. Submit the Application for Indiana Pesticide Credentials for the for-hire applicator license ($45 annual) tied to the employing business. Exam sitting fees were not stated on reviewed OISC pages - confirm when scheduling.

CCH renewal for Category 7b. Renew by re-examination or 15 category-specific CCHs before expiration under 355 IAC 4-7-2. Category 7a requires 20 CCHs; Category 12 requires 10 CCHs. No more than half of required CCHs at any one training program; excess CCHs do not carry forward.

Reciprocity boundaries. OISC reciprocity applies only to applicators whose businesses are located outside Indiana, based on origin-state exams. In-state businesses must take Indiana exams. Reciprocity still requires Indiana business license, fees, and insurance - and does not authorize for-hire work before credentials are issued. Confirm the current reciprocal-states list with OISC (PDF last revised 07/30/19 on site at access).

Fumigation and specialty categories. The Indiana facts pack does not verify a distinct fumigation category for WDO work. Review OISC's full category list before adding fumigation or other specialty WDO lines.