Indiana Landscaping Contractor License Requirements (2026)

Indiana does not issue a state-level landscape contractor trade license. The mandatory state credential is a Commercial Applicator license issued by the Office of Indiana State Chemist (OISC) at Purdue University under IC 15-16-5 (Indiana Pesticide Use and Application Law). Any commercial application of pesticides, herbicides, or fertilizers containing pesticides on residential or commercial property triggers OISC certification. Many Indiana cities (Indianapolis, Fort Wayne, South Bend, Evansville) require local contractor registration; Indianapolis specifically requires General Contractor registration with the Department of Business and Neighborhood Services for landscape installs that include hardscape or grading.

Governing Authority

Indiana Plumbing Commission — Indiana Professional Licensing Agency (IPLA) administers and enforces this credential under the authority of Indiana Code 25-28.5; 860 IAC 1 (Plumbing Commission rules); 675 IAC 16 (Indiana Plumbing Code). The Indiana Plumbing Commission, administered by the Indiana Professional Licensing Agency (IPLA), licenses Plumbing Contractors and Journeyman Plumbers statewide, approves apprenticeship programs, and conducts disciplinary proceedings under IC 25-28.5.

Official portal: https://www.in.gov/pla/professions/plumbing/
Address: 402 W. Washington Street, Room W072, Indianapolis, IN 46204
Phone: (317) 234-3009

Eligibility Requirements

At a minimum the applicant has to be 18 years old and supply a valid Social Security Number or Individual Taxpayer Identification Number (ITIN). No residency requirement.

Good moral character

OISC reviews prior pesticide enforcement history.

Background investigation

Required disclosure on the OISC application.

Experience & Education Matrix

No fixed number of years of experience is set out in the cited sources for this credential; instead, the controlling requirement is No experience requirement for landscape installation. OISC Commercial Applicator requires passing the Core (General Standards) exam plus the appropriate category exam (Category 3a Ornamental Pest Control, Category 3b Turf Pest Control)..

Accepted proof of experience or eligibility

OISC Commercial Applicator application with exam pass slips

Education substitution

Purdue Pesticide Programs (PPP) training counts toward OISC continuing education.

Examination Structure

Examinations are administered by Office of Indiana State Chemist — Purdue University. The applicant must pass the following examination parts before the license can issue:

OISC Core (General Standards) exam — 50 questions, 90 minutes, passing score 70%
OISC Category 3a / 3b — Ornamental / Turf Pest Control — 50 questions, 90 minutes, passing score 70%

Examination fee: $45 Commercial Applicator license fee + $25 per category exam.

Retake policy: Failed exams may be retaken after 14 days; new $25 fee.

Insurance & Financial Security

This credential carries no state-level surety bond requirement under the cited sources. Individual jobs may still trigger a permit or public-works bond, which should be verified before bidding.

General liability

OISC requires Commercial Applicators to maintain $100,000 bodily injury / $100,000 property damage / $300,000 aggregate.

Workers' compensation

Mandatory under IC 22-3 for any employer with one or more employees.

Additional financial requirements

Not required.

Application and License Fees

Fee	Amount
Application (non-refundable)	$45
Examination	$50
Initial license	$45
Renewal (every year)	$45

Maintenance & Renewal

Expect to renew the Indiana Landscaping — No State Trade License (OISC Commercial Pesticide Applicator + Local Licensing) every year. Renewal currently costs $45. OISC Commercial Applicator licenses renew annually on December 31.

Continuing education: 5 CEU hours every five-year cycle (Core + category) approved by OISC, OR re-examination.

Downloadable Asset

2026 Indiana Landscaping License Roadmap (PDF) — a printable step-by-step checklist for the application process.

Download the PDF roadmap →

Reciprocity and Endorsement

Indiana does not accept the NASCLA Accredited Examination for this classification.

Reciprocal State	Accepted Exam	Conditions
No formal bilateral reciprocity agreements identified.

OISC grants pesticide applicator reciprocity on a case-by-case basis to applicants holding equivalent active certification in Illinois, Ohio, Kentucky, or Michigan.

Weighing more than one jurisdiction? The national hub compares Landscaping license requirements in every state — exam, bond, fee, and experience thresholds side by side.

Step-by-Step Application Roadmap

Register Indiana business entity and EIN. File with the Indiana Secretary of State.
Apply for local municipal business licenses. Indianapolis BNS, Fort Wayne, South Bend, and Evansville each require local registration.
Secure $100,000/$100,000/$300,000 liability insurance. Required by OISC for any commercial applicator.
Pass the OISC Core exam at 70%. Required baseline.
Pass OISC Category 3a / 3b — Ornamental / Turf. Landscape pesticide categories.
Apply for OISC Commercial Applicator license. Submit application, pass slips, and $45 fee.
Comply with Indianapolis BNS General Contractor registration (if applicable). Required for landscape installs including hardscape or grading in Marion County.
Enroll workers compensation. Required for any W-2 employee.

Study and Reference Materials

The references below are either cited by the board, used during the application, or standard preparation for the trade. They are listed purely for convenience — CLR earns no commission on any of them.

Indiana Pesticide Applicator Core Manual — Purdue Pesticide Programs (PPP-1). Required reference for the OISC Core exam.
Ornamental and Turf Pest Management — Purdue Extension. Category 3a/3b study guide.
IC 15-16-5 — Indiana Pesticide Use and Application Law — State of Indiana. Statutory reference for the regulatory portion of the Core exam.

Common Filing Mistakes

Based on the board's own instructions and the sources cited here, the problems below are what most often stall a Indiana Landscaping application.

Spraying without OISC certification

Civil penalties up to $1,000 per violation under IC 15-16-5-65.

Skipping Indianapolis BNS registration

Marion County enforces unregistered contractor activity with fines up to $500 per day plus stop-work orders.

Backflow violations on irrigation

Indiana Plumbing Commission requires annual testing on every irrigation backflow assembly.

Missing OISC recertification CEUs

CEUs must be earned within the five-year cycle; missing forces re-examination.

Not collecting Indiana sales tax on landscape services

Indiana DOR treats landscape installation as taxable retail; unregistered contractors face audits and back taxes.

Pre-Submission Checklist

The items below are the ones worth confirming before the application is filed with IPLA:

☐ Indiana business entity registration
☐ Local municipal business licenses (Indianapolis BNS, etc.)
☐ $100,000/$100,000/$300,000 liability insurance
☐ OISC Core exam pass certificate
☐ OISC Category 3a/3b exam pass
☐ OISC Commercial Applicator license
☐ Indianapolis BNS General Contractor registration (if applicable)
☐ Workers compensation coverage

Other Indiana Trade Licenses

If the Landscaping license is not the right fit, the following published Indiana trade guides are also covered by CLR:

Frequently Asked Questions

Does Indiana require a landscape contractor license?

No. There is no state landscape trade license. The OISC pesticide certification is mandatory for any commercial spraying.

Who is the Indiana State Chemist?

The OISC is housed at Purdue University and is the state regulatory authority for pesticides, fertilizers, and seed under Indiana law. All commercial applicators apply through OISC.

Do I need a contractor registration in Indianapolis?

Yes, for landscape installations in Marion County that include hardscape or grading. Indianapolis BNS requires General Contractor registration with proof of insurance.

Is irrigation backflow regulated?

Yes. Indiana plumbing code requires a tested reduced-pressure backflow assembly on every irrigation tie-in to potable water; testing must be done annually by an Indiana Plumbing Commission certified backflow tester.

How often does the OISC license renew?

Annually on December 31. Recertification requires 5 CEU hours every five-year cycle (Core + category) approved by OISC, OR re-examination.

Primary Sources

Regulatory requirements on this page are drawn from the official board, statute, and exam-provider materials listed below.

Verified 2026-05-26 · Next scheduled review 2026-08-24