All boiler and pressure vessel inspectors working in Washington are required to have a "work card" issued by L&I.

To be eligible for a work card, you must:

Boiler Inspector Examination

Washington State boiler inspector exams are administered upon request. For exam scheduling and information, please contact the Boiler Program's Administrative Assistant at 360-902-5271. Applications must be received 30 days prior to the test day. An examination fee will be charged.


National Board commissioned inspectors who have not worked in the State of Washington for 3 years must re-take the Washington State Examination.

National Board Inservice Commission Exams are offered by request four times a year, namely the first Wednesday and following Thursday of the months of March, June, September and December. For more information, please visit the National Board website.

Examination & Certification Fees
  • Examination fee: A fee of $107.50 will be charged for each applicant sitting for an inspection examination(s).
  • Special inspector commission: An initial fee of $58.00 (including work card).
    • Total Due: $165.50 (exam and work card fee).
      • This amount must be paid before the exam. Payment can be made at the Labor & Industries office, online, or mailed and received by our office before the exam date.
      • If paid at a service location, or online, please retain a copy of the receipt and send it to us prior to the exam.
    • Annual special inspector commission: A fee of $36.00 for annual renewal.
    • If a special inspector changes companies: A work card fee of $58.00 will be charged.
Boiler Operator Licensing Information

A boiler operator's license is not required for individuals who operate boilers in the state of Washington. However, a valid boiler operator's license is required for:

  • City of Seattle - 206-684-5174.
  • City of Spokane - 509-625-6313.
  • City of Tacoma - call Bates Technical College at 253-680-7400.
  • Companies or facilities that have internal boiler operator licensing requirements – refer to your company’s policies.