Who regulates fire extinguisher service companies in Montana?

Montana Dept. of Labor & Industry is the agency the research identified for this trade in Montana. Requirements and license classes change, so confirm the current rules with them directly.

How do I confirm the exact Montana requirements before my first job?

Contact Montana Dept. of Labor & Industry and confirm, in writing, the company license or registration, the technician certification, and any surety bond or insurance filing your scope needs. Requirements vary by jurisdiction — verify with your AHJ (authority having jurisdiction) before you take paid work. This page is a starting point, not legal advice.

Does hydrostatic testing add requirements in Montana?

Often, yes. Hydrostatic testing of extinguisher cylinders falls under federal DOT rules on top of your Montana service license, and some shops sub it out to a partner with the equipment rather than build a test bench on day one. Confirm what your license covers and what the testing adds.

What must a fire extinguisher service tag say in Montana?

This research pass could not read a Montana service-tag rule, so this page states none. There is no national tag standard to fall back on and no national colour code: NFPA 10 mandates no tag colour, and the per-state rules that do exist disagree with each other. Ask Montana Dept. of Labor & Industry what a tag must carry here before you print one.

State license required

Fire extinguisher service license requirements in Montana

Updated August 2026

Montana licenses portable fire-extinguisher service at the state level (Fire Protection License — Business Entity (Sell, Install and Service)), through Montana Dept. of Labor & Industry. Get licensed before you take a paid job — and verify the exact class and any technician credential with the agency.

What the research found

State: Montana (MT)
Regulating agency: Montana Dept. of Labor & Industry
License / class: Fire Protection License — Business Entity (Sell, Install and Service)
Notes from the source: Montana statute requires a Department of Labor and Industry license before an entity engages in the business of servicing fire extinguishers, and the program lists Business Entity (Sell, Install and Service) among its license types. Each employee performing the work also needs a department endorsement.
Service tag: Verify with the agency

Verify with your AHJ. This is a research-derived starting point, not legal advice. Rules change, and local requirements stack on top of state ones, so the only answer that governs your work is the one you get from Montana Dept. of Labor & Industry and from your AHJ, the local authority having jurisdiction, before you take a paid job.

Which code edition applies in Montana

An NFPA standard carries no legal force until a jurisdiction adopts it, and jurisdictions adopt different editions, years apart, with local amendments. So the useful question is never "what does NFPA 10 say". It is "which edition has my authority adopted".

This research pass did not reach an adoption record for Montana, so this page names no edition. That is a gap in what we could read, never a finding that the state adopts nothing. Ask Montana Dept. of Labor & Industry which edition of NFPA 10 and which fire code are in force, and ask your authority having jurisdiction the same question, because the two answers are not always the same one.

What a service tag must carry in Montana

This research pass could not read a Montana service-tag rule, so this page states none. There is no national tag standard to fall back on: NFPA 10 mandates no tag colour, the popular "the colour tells you the year" rule is a vendor convention rather than law, and the state rules that have been read do not match each other. Ask Montana Dept. of Labor & Industry what a tag must carry here, in writing, before you print a run of them.

The per-state picture, and why the colour folklore is wrong, is laid out in the state-by-state tag requirements guide and what a fire extinguisher tag colour actually means.

The cadence underneath all of it

Whether or not Montana licenses this trade, the intervals your customers owe are set somewhere else, and one layer of them is federal. Under OSHA's portable fire extinguisher regulation, an employer subject to OSHA has to have extinguishers visually inspected monthly and put through an annual maintenance check, wherever the building is. The state's adopted edition of NFPA 10 and the local fire marshal stack on top of that floor.

The interval that surprises people is the pressure test, because it is not one number: it depends on the agent and the shell, and a unit on the wrong assumption reads as current for years when it is not. The full picture, with the section of the federal regulation each interval comes from, is in the federal extinguisher intervals guide, and the by-type test schedule is in hydrostatic test intervals by extinguisher type. To put dates against a specific unit, the free cadence lookup takes a manufacture date and an equipment type and returns the next dates due. It is a planning aid, never a verdict on a building.

Sources

Every statement above traces to one of these. Open them and read the current text yourself, because the agency page is the record and this page is only a pointer to it.

Frequently Asked Questions

Do I need a license to service fire extinguishers in Montana?: Montana licenses portable fire-extinguisher service at the state level (Fire Protection License — Business Entity (Sell, Install and Service)), through Montana Dept. of Labor & Industry. Get licensed before you take a paid job — and verify the exact class and any technician credential with the agency.
Who regulates fire extinguisher service companies in Montana?: Montana Dept. of Labor & Industry is the agency the research identified for this trade in Montana. Requirements and license classes change, so confirm the current rules with them directly.
How do I confirm the exact Montana requirements before my first job?: Contact Montana Dept. of Labor & Industry and confirm, in writing, the company license or registration, the technician certification, and any surety bond or insurance filing your scope needs. Requirements vary by jurisdiction — verify with your AHJ (authority having jurisdiction) before you take paid work. This page is a starting point, not legal advice.
Does hydrostatic testing add requirements in Montana?: Often, yes. Hydrostatic testing of extinguisher cylinders falls under federal DOT rules on top of your Montana service license, and some shops sub it out to a partner with the equipment rather than build a test bench on day one. Confirm what your license covers and what the testing adds.
What must a fire extinguisher service tag say in Montana?: This research pass could not read a Montana service-tag rule, so this page states none. There is no national tag standard to fall back on and no national colour code: NFPA 10 mandates no tag colour, and the per-state rules that do exist disagree with each other. Ask Montana Dept. of Labor & Industry what a tag must carry here before you print one.

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