Plumber License from Illinois to Oklahoma: Does It Transfer? (2026)
Last verified: 2026-07-21 · source: Oklahoma Construction Industries Board (CIB) — Plumbing Division ↗
A plumbing license transfers from Illinois to Oklahoma by endorsement — there is no automatic reciprocity, but you do not start over. Apply to the Oklahoma Construction Industries Board (CIB) — Plumbing Division, verify your Illinois license, and meet Oklahoma's endorsement requirements. Oklahoma waives its journeyman plumbing exam only for applicants who hold an unlimited plumbing journeyman (or higher) Arkansas license obtained by Arkansas examination and held at least one year in good standing, under the Oklahoma-Arkansas reciprocity agreement effective 2024-10-21; all other out-of-state plumbers must qualify with three years of experience (or an approved education substitution) and pass the Oklahoma journeyman exam.
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Verdict
Licensure by endorsement
Illinois is not among the states Oklahoma names for an automatic exam waiver, so this move runs on the Oklahoma Construction Industries Board (CIB) — Plumbing Division's individual endorsement or equivalency review rather than a guarantee. Oklahoma waives its journeyman plumbing exam only for applicants who hold an unlimited plumbing journeyman (or higher) Arkansas license obtained by Arkansas examination and held at least one year in good standing, under the Oklahoma-Arkansas reciprocity agreement effective 2024-10-21; all other out-of-state plumbers must qualify with three years of experience (or an approved education substitution) and pass the Oklahoma journeyman exam. Bring your Illinois license, proof that it is active and in good standing, and your apprenticeship and exam records — and get any discretionary exam or experience credit in writing before you rely on it.
What changes, Illinois → Oklahoma
| Illinois (current) | Oklahoma (destination) | |
|---|---|---|
| Application fee | $225 (Application fee for a plumber registered or licensed in Chicago or outside Illinois is $225 (an in-state Illinois licensed-apprentice applicant pays $175); a separate $150 plumber's license fee applies on issuance (68 Ill. Adm. Code 750.1100). The City-of-Chicago reciprocity (license without exam) carries a $150 license fee. Returned-check fee $100) | $75 (Arkansas reciprocal application total $75.00 ($50 license fee + $25 application processing fee). Non-reciprocal applicants pay a separate journeyman application fee and a third-party exam fee.) |
| Processing time | No board-stated processing time; the examination application is due at least 30 days before the examination date | No board-stated processing time. |
| Licensing authority | Illinois Department of Public Health (IDPH) — Plumbing Program | Oklahoma Construction Industries Board (CIB) — Plumbing Division |
The destination column is what you must satisfy — Oklahoma sets the rules for this move.
Step by step
- Confirm Oklahoma's current requirements on the Oklahoma Construction Industries Board (CIB) — Plumbing Division website (linked below) — rules change.
- Submit the endorsement application to the Oklahoma Construction Industries Board (CIB) — Plumbing Division (application linked below).
- Arrange license verification from your current state via the verification system.
- Hold an unlimited plumbing journeyman (or higher) Arkansas license obtained by Arkansas examination — not by reciprocity — and held for at least one year.
- License current and in good standing with no suspension, revocation, or pending discipline, and current on continuing education.
- Submit the CIB Request for Verification of License bearing the Arkansas state seal (originals only; no photocopies or digital copies).
- Not have performed unlicensed plumbing work in Oklahoma within the past two years.
- Pay the fees ($75 (Arkansas reciprocal application total $75.00 ($50 license fee + $25 application processing fee). Non-reciprocal applicants pay a separate journeyman application fee and a third-party exam fee.)) and allow No board-stated processing time..
Official links
Related guides
Frequently asked questions
Does Oklahoma accept a Illinois plumbing license?
A plumbing license transfers from Illinois to Oklahoma by endorsement — there is no automatic reciprocity, but you do not start over. Apply to the Oklahoma Construction Industries Board (CIB) — Plumbing Division, verify your Illinois license, and meet Oklahoma's endorsement requirements. Oklahoma waives its journeyman plumbing exam only for applicants who hold an unlimited plumbing journeyman (or higher) Arkansas license obtained by Arkansas examination and held at least one year in good standing, under the Oklahoma-Arkansas reciprocity agreement effective 2024-10-21; all other out-of-state plumbers must qualify with three years of experience (or an approved education substitution) and pass the Oklahoma journeyman exam.
Which exam applies moving from Illinois to Oklahoma?
Oklahoma waives its journeyman plumbing exam only for applicants who hold an unlimited plumbing journeyman (or higher) Arkansas license obtained by Arkansas examination and held at least one year in good standing, under the Oklahoma-Arkansas reciprocity agreement effective 2024-10-21; all other out-of-state plumbers must qualify with three years of experience (or an approved education substitution) and pass the Oklahoma journeyman exam.
What does the Illinois-to-Oklahoma move cost and how long does it take?
$75 (Arkansas reciprocal application total $75.00 ($50 license fee + $25 application processing fee). Non-reciprocal applicants pay a separate journeyman application fee and a third-party exam fee.); processing No board-stated processing time..
Can I keep my Illinois plumbing license after I'm licensed in Oklahoma?
Yes — plumbing licenses in different jurisdictions run independently. Keep the Illinois credential active on its own renewal and continuing-education schedule and you hold both, which is common for plumbers working near a state line.
Sources
Primary sources only — official boards and compact commissions. Data last verified 2026-07-21.
- Oklahoma CIB — Arkansas Plumbing Reciprocity Agreement (news; effective 2024-10-21; exam waived; conditions) ↗ (accessed 2026-07-21)
- Oklahoma CIB — Arkansas Plumbing Reciprocal License Application (fees $50+$25=$75; eligibility) ↗ (accessed 2026-07-21)
- Oklahoma CIB — Plumbing Journeyman requirements (three-year experience; out-of-state license pathway) ↗ (accessed 2026-07-21)
- Illinois DPH — Application for Examination for Plumber's License (fees $175 in-state / $225 out-of-state; out-of-state section; 4-year 225 ILCS 320/10(d) requirement) ↗ (accessed 2026-07-21)
- Illinois DPH — Application for Plumber's License Reciprocity with the City of Chicago License Without Examination ($150 fee) ↗ (accessed 2026-07-21)
- 68 Ill. Adm. Code 750.1100 — Plumbers' and Apprentice Plumbers' Examination and Licensure Fees (Legal Information Institute) ↗ (accessed 2026-07-21)
- Illinois DPH — Plumbing program (license types, license verification link) ↗ (accessed 2026-07-21)
Reviewed by Billy Reiner, Editor · verified against primary sources 2026-07-21
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