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Boiler Operator License
Total cost: $60-$90
Governing Authority
Maine Department of Professional and Financial Regulation — Boiler and Pressure Vessel Program
Official website →Some details on this page are not yet confirmed against an official source. See sources below or contact the licensing board to verify.
Yes
License Required
5
License Grades
Yes
Exam Required
$60-$90
Total Initial Fees
Annual
Renewal Period
No
CE Required
You must be at least 18 years old. Verify all eligibility requirements with the Maine Department of Professional and Financial Regulation — Boiler and Pressure Vessel Program.
Education: High school diploma or equivalent. Experience: 6 months to 3+ years depending on license class. Approved programs: On-the-job training under a licensed engineer; approved training courses.
Maine offers 5 license grades: Low Pressure Engineer, 4th Class Stationary Engineer, 3rd Class Stationary Engineer, 2nd Class Stationary Engineer, 1st Class Stationary Engineer. Each grade covers different boiler types and capacities. Choose the grade that matches the equipment you will operate.
Written examination covering boiler operation, safety, ASME codes, and Maine regulations Administered by Maine Board of Stationary Steam Engineers and Boiler Operators. Passing score: 70% (minimum). Based on ASME Boiler and Pressure Vessel Code. Exam fee: $30. Retake policy: May retake after 30 days.
Submit your application to the Maine Department of Professional and Financial Regulation — Boiler and Pressure Vessel Program. License fee: $30. Total initial fees: $60-$90.
Renew your license annual. Renewal fee: $30.
Total startup cost for boiler operator licensing
License Fee
$30
Maine boiler operator license fee
Exam Fee
$30
Examination fee
Renewal Fee
$30
Renewal fee per cycle
Total estimated initial costs including license and exam fees
Maine boiler operator licensing overview
Mostly verifiedRequired
State License
5
License Grades/Classes
18+
Minimum Age
License Grades / Classes
Low Pressure Engineer
For operating low-pressure heating boilers
Experience: Basic boiler operation knowledge
Boiler Types: Low-pressure steam (15 psi max) and hot water boilers
4th Class Stationary Engineer
For operating boilers up to 50 HP
Experience: 6 months experience
Boiler Types: Boilers up to 50 HP
3rd Class Stationary Engineer
For operating boilers up to 100 HP
Experience: 1 year experience
Boiler Types: Boilers up to 100 HP
2nd Class Stationary Engineer
For operating boilers up to 500 HP
Experience: 2 years experience
Boiler Types: Boilers up to 500 HP
1st Class Stationary Engineer
Unlimited boiler operation
Experience: 3+ years experience
Boiler Types: All boilers, unlimited HP
Boiler operator licensing requirements vary significantly by state. Some states require multiple grades of licenses based on boiler size and pressure rating, while others do not require a state-level license at all. The ASME Boiler and Pressure Vessel Code provides the national standard for boiler safety. Always verify current requirements with your state licensing authority.
Not sure if you need a boiler operator license? Check whether your state requires one.
Education, experience, and training requirements
Mostly verifiedEducation Required
High school diploma or equivalent
Experience Required
6 months to 3+ years depending on license class
Apprenticeship
Not Required
Training Programs
On-the-job training under a licensed engineer; approved training courses
Boiler operator training typically combines classroom instruction with hands-on experience. Many states require a combination of formal education and documented operating experience before licensure. The National Board of Boiler and Pressure Vessel Inspectors (NBBI) and industry associations offer additional training and certification programs.
Browse Boiler Operator study materials on Amazon →(affiliate link)
Examination requirements and details
Mostly verifiedExam Required
Yes
Exam Provider
Maine Board of Stationary Steam Engineers and Boiler Operators
Passing Score
70% (minimum)
Exam Details
Written examination covering boiler operation, safety, ASME codes, and Maine regulations
Retake Policy
May retake after 30 days
Applicable Codes & Standards
ASME Boiler and Pressure Vessel Code
Boiler operator examinations typically cover ASME Boiler and Pressure Vessel Code, boiler operation principles, safety procedures, and state-specific regulations. Some states use examinations from the National Institute for the Uniform Licensing of Power Engineers (NIULPE), while others administer their own exams.
Overall licensing difficulty: 1/100
Study recommendation: 1–2 weeks of focused review is usually sufficient
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Boiler Operator Exam Prep Materials
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Difficulty rating based on education, exam, and experience requirements. Individual experience may vary.
Insurance and bonding requirements
Mostly verifiedInsurance Required
No
Bonding Required
No
Most states do not require individual boiler operators to carry personal insurance or bonding. Employers typically carry workers' compensation and general liability insurance that covers boiler operations. Facilities with boilers are generally required to have boiler and machinery insurance.
| Fee | Amount |
|---|---|
License Fee Maine boiler operator license fee | $30 |
Exam Fee Examination fee | $30 |
Renewal Fee Renewal fee per cycle | $30 |
Total Initial Fees Total estimated initial costs including license and exam fees | $60-$90 |
Use our licensing cost calculator to estimate your total investment including education and exam fees.
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See how quickly your license investment pays for itself.
Renewal requirements and ongoing obligations
Mostly verifiedAnnual
Renewal Period
Not Required
Continuing Education
N/A
CE Hours per Cycle
Renewal Fee
$30
Regulatory Board
Renewal requirements vary by state. Most states that license boiler operators require annual or biennial renewal. A few states require continuing education to maintain licensure. Failure to renew on time may result in lapse of license and the need to retake examinations.
Maine has one of the most structured boiler operator licensing programs in New England, with five distinct license classes.
Maine has a comprehensive boiler operator licensing program with 5 levels from low-pressure to 1st Class.
The Board of Stationary Steam Engineers and Boiler Operators administers examinations and issues licenses.
All high-pressure boiler plants must have a licensed engineer on duty.
There is no interstate compact for boiler operators.
Boiler Operator requirements in nearby states
| State | Total Cost | Timeline | |
|---|---|---|---|
| Maine (you) | $60 | 4–12 wks | |
| Massachusetts | $125 | 4–12 wks | → |
| New Hampshire | $50 | 4–12 wks | → |
| Vermont | N/A — No state license required | 1–4 wks | → |
See how Maine compares: Boiler Operator License Fees by State — Cheapest to Most Expensive →
Compare boiler operator requirements across all states →
Boiler Operator licensing requirements nationwide →
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How does Maine compare to other states for boiler operator? See the full comparison →
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Explore requirements for other professional licenses in Maine.
Boiler Operator Schools in Maine
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Study guides and practice tests for boiler operator licensing exams.
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Boiler Operator requirements in Maine verified against Maine Department of Professional and Financial Regulation — Boiler and Pressure Vessel Program, March 2026.
Moving to Maine? Use our free Transfer Tool to see what you need →
Already licensed elsewhere? See how to transfer your Boiler Operator license to Maine →
Transfer your Boiler Operator license from Maine to: New Hampshire →
Maine requires boiler operators to hold a state license. 5 license grade(s) are available for different boiler types and capacities. Boiler safety in Maine is overseen by the Maine Department of Professional and Financial Regulation — Boiler and Pressure Vessel Program.
Requirements vary by state. Always verify current requirements with your state licensing authority.