Plumber License Requirements in Ohio
| Licensing Authority | Ohio Construction Industry Licensing Board (OCILB) |
| License Type | Plumbing Commercial Contractor |
| Experience Required | 5 years of experience as a plumbing tradesperson immediately prior to the date the application is filed. Experience must be continuous and verifiable. Alternatively, applicants who are currently registered engineers in Ohio with 3 years of business experience in the plumbing construction industry may qualify. |
| Education Substitute | A registered engineer in Ohio with 3 years of business experience in the plumbing construction industry may substitute for the 5-year tradesperson requirement. Applicants must also complete 40 hours of live or webinar-based virtual continuing education training from an OCILB-approved training provider no more than 1 year prior to the application date. |
| Exam Required | Yes — Plumbing Contractor Trade Exam + Business and Law Exam |
| Bond Required | No |
| Insurance | General liability: required. Workers comp: required with employees |
| Continuing Education | 8 hours 1 year |
| Processing Time | 4-8 weeks (application review + background check + exam scheduling) |
Fee Breakdown
| Application Fee | $25 |
| Exam Fee | $138 |
| Initial License Fee | $25 |
| Fingerprinting | $66 |
| Est. Initial Total | $254 |
Related & additional fees
Separate or ongoing costs — not included in the estimate above.
| PSI trade exam fee | $69 |
| PSI business & law exam fee | $69 |
| 3-year renewal option | $180 |
| BCI/FBI background check (approx.) | $66 |
Renewal: $60 every 1 year
Exam Requirements
Plumbing Contractor Trade Exam
Business and Law Exam
Exam provider: PSI
Recommended exam prep
Formal prep pays for itself against a $100+ retake. Many states examine contractors on two separate papers — the trade exam and a business and law exam — so we list the course covering both first, with trade-specific depth after.
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Mometrix · SponsoredContractor License Online Study CourseFull online prep course covering the trade and business-and-law exams — video lessons, practice questions, and a study plan built for a first-try pass.See the course →
Mometrix · SponsoredPlumber's Exam Secrets Study GuideCovers plumbing code, systems, and installation for the journeyman and master plumber exams — organized topic reviews plus practice questions for a first-try pass.See the study guide →
Mometrix · SponsoredPlumber's Exam FlashcardsPortable flashcards for the high-frequency plumber-exam topics — a cheaper add-on for drilling code references and terms on the go.See the flashcards →Set up the business before you apply in Ohio
Most states license the company as well as the person, so the application usually asks for an LLC or corporation and a registered agent in Ohio. Northwest forms the entity and acts as your registered agent — a flat fee, no upsell funnel.
Some links below are affiliate links. If you buy through them we may earn a commission at no extra cost to you.
Form an LLC with Northwest→License Reciprocity
This state has reciprocity agreements with 4 states. View full reciprocity details — You may be able to skip the trade exam if you hold a valid license from one of these states.
Notes
- OCILB state license covers COMMERCIAL plumbing work only — residential plumbing may require separate local licensing
- Both exams are open-book; highlighting permitted but no writing in reference materials
- Plumbing CE: 8 hours for 1-year renewal, 24 hours for 3-year renewal; max 4 hours self-paced per year (12 for 3-year)
- 40 hours of pre-application training required from OCILB-approved provider within 1 year of application
- Background check (BCI/FBI) must be completed after application approval but before exam
- No statewide residential plumber license — residential plumbing is regulated at the local level
You're licensed in Ohio as a plumber — the next 30 days
Most of the steps below are required before your first paid job; the order is the order the state and its counties will ask for them.
Some links below are affiliate links. If you buy through them we may earn a commission at no extra cost to you.
Form the business and get an EIN.
The Ohio Construction Industry Licensing Board issues the Plumbing Commercial Contractor; the business that invoices Ohio customers is a separate decision. A sole proprietorship is the default, an LLC keeps business liability off your personal assets, and either needs an EIN before the first payroll. Settle it before the license number goes on an estimate.
Bond: none required by the state.
Ohio does not require a surety bond for this license — The OCILB does not require a surety bond for commercial plumbing contractor licenses at the state level. Local jurisdictions may impose bond requirements.
Carry the insurance the license requires.
Ohio requires general liability insurance for this license. Minimum $500,000 contractor liability insurance required, with OCILB listed as certificate holder. Workers' compensation required through Ohio BWC for all employers with employees (monopolistic state fund). Contractor insurance requirements→
Set up quoting, scheduling and invoicing before the first call.
Your first customers will ask for a written estimate and expect to pay by card on site. Most one-truck plumber businesses run that on field-service software; Housecall Pro is the one we link because it is built for this size of company and this link carries 20% off your first 12 months. Start a free trial of Housecall Pro→
Keep the license.
Renewal is every year at $60. Continuing education: 8 hours every year.
Other licenses in Ohio
- General Contractor license in Ohio
Statewide registration, not a license · $50 in fees · OCILB / Local
- Electrician license in Ohio
Statewide license required · $254 in initial government fees · OCILB
- HVAC Technician license in Ohio
Statewide license required · $254 in initial government fees · OCILB
- Roofing Contractor license in Ohio
Statewide registration, not a license · Local
Frequently Asked Questions
Do I need a plumber license in Ohio?
Yes, Ohio requires a statewide plumber license through the Ohio Construction Industry Licensing Board.
How much does a plumber license cost in Ohio?
The estimated initial cost is $254, including application, exam, and license fees.
What experience do I need for a plumber license in Ohio?
5 years of experience as a plumbing tradesperson immediately prior to the date the application is filed. Experience must be continuous and verifiable. Alternatively, applicants who are currently registered engineers in Ohio with 3 years of business experience in the plumbing construction industry may qualify. Education substitute: A registered engineer in Ohio with 3 years of business experience in the plumbing construction industry may substitute for the 5-year tradesperson requirement. Applicants must also complete 40 hours of live or webinar-based virtual continuing education training from an OCILB-approved training provider no more than 1 year prior to the application date.
What exams are required for a plumber license in Ohio?
You must pass the Plumbing Contractor Trade Exam and Business and Law Exam exams. A passing score of 70% is required. Exams are administered by PSI.
Does Ohio have plumber license reciprocity?
Yes, Ohio has reciprocity agreements with 4 states that may apply to plumbers. Licensed contractors from these states may be eligible to skip certain exams or have an expedited application process.
How long does it take to get a plumber license in Ohio?
Processing time is typically 4-8 weeks (application review + background check + exam scheduling) after submitting a complete application.
Is continuing education required for plumbers in Ohio?
Yes, 8 hours per 1 year is required for license renewal.
Next steps
You know the requirements for plumbers in Ohio— here's how to actually pass and apply.
Data last verified: 2026-04-02 | Source: OCILB