Missouri Private Investigator License Requirements

Missouri does license private investigators, through a dedicated Board of Private Investigator and Private Fire Investigator Examiners under the Division of Professional Registration, and requires U.S. citizenship and a $250,000 liability policy.

Missouri PI license at a glance

Item	Detail
Regulator	Missouri Board of Private Investigator and Private Fire Investigator Examiners
Law	RSMo 324.1108
Citizenship	U.S. citizen
Insurance	Liability insurance of at least $250,000, plus workers’ compensation where chapter 287 requires it; the Board may raise these
Fingerprints	Two sets of classifiable fingerprints, processed through the Missouri State Highway Patrol
Photos	Two recent photographs; two 2-inch headshots for the ID card
Exam	Required unless exempt; no more than 4 attempts in 12 months
Exemptions	2 years of lawful practice within the past 3 years; certain law enforcement officers; reciprocity under section 324.009; licensed PIs from another state
Continuing education	Required for renewal
Contact	3605 Missouri Blvd, Jefferson City; (573) 522-7744; [email protected]

What’s different here: a four-attempts-per-year cap on the exam.

Missouri PI license FAQ

Do I have to take the exam if I have experience?

Not if you qualify for an exemption, such as 2 years of lawful practice in the last 3.

Does Missouri require a license?

Yes.

Verified against: RSMo 324.1108 and the Division of Professional Registration newsletter (Feb 2023). Reviewed October 13, 2026.

Who regulates private investigators in Missouri

The Board, based in Jefferson City, licenses individual private investigators, agencies and agency employees under Chapter 324 of the Missouri Revised Statutes. Missouri lawmakers introduced statewide PI licensing bills for several years before enacting the current system; earlier, only some cities licensed investigators.

Missouri PI license types

License or credential	Who it is for
Private investigator license	Individuals who meet the experience, exam and insurance requirements
Private investigator agency license	Businesses; must be run by an individual license holder
Agency employee license	Employees of licensed agencies (no experience requirement)
Private fire investigator license	Fire investigators (separate track)

How to get licensed in Missouri: step by step

1. Start as a licensed agency employee if you don’t yet have experience.
2. Document about 4,000 hours of qualifying experience, or gather degree or law enforcement records.
3. Submit the individual application with the $500 nonrefundable fee.
4. Pass the $80 exam in Jefferson City.
5. Provide proof of $250,000 general liability insurance.
6. Apply separately for an agency license if you’ll run a business.

Carrying a firearm as a Missouri investigator

Missouri’s PI license doesn’t by itself authorize carrying a firearm on duty. Check the Board’s rules and Missouri law before carrying while working.

What a private investigator in Missouri can and can’t do

A PI license is a business license, not police authority. In Missouri, as everywhere in the U.S., private investigators generally cannot:

• Impersonate law enforcement or claim official authority.
• Trespass on private property to watch or photograph someone.
• Obtain bank, phone or other protected records by pretexting, which federal law prohibits.
• Hack accounts, read someone else’s email or install spyware.
• Place a tracking device on a vehicle where state law forbids it.
• Detain or arrest anyone beyond the citizen’s arrest rights every person has.

On recording, Missouri is not on the list of all-party consent states in a 2024 legal summary by the law firm Kilpatrick, which generally means one party to a conversation can record it. That does not allow recording conversations you are not part of, and other privacy laws still apply.

Building a career as a Missouri investigator

Knowing the rules in Missouri is only the first step. Our guide to becoming a private investigator covers what comes after: building qualifying experience, choosing a niche, a realistic first year, writing reports clients trust, and the most common reasons license applications get delayed. For earnings, see our private investigator salary guide.

Starter gear. A practical starting point for surveillance work is a long-zoom camera such as the Nikon Coolpix P1000 and a pair of binoculars like the Vortex Diamondback HD 10×42. Our private investigator equipment list covers the rest of a starter kit.

Frequently asked questions

Do I need a license to be a private investigator in Missouri?

Yes. Missouri requires private investigators to be licensed by the Board of Private Investigator and Private Fire Investigator Examiners.

How long does it take to become a PI in Missouri?

Agency employees can be licensed relatively quickly. An individual license typically requires about two years of experience unless a degree or law enforcement service substitutes.

Does Missouri accept out-of-state PI licenses?

Yes, with an equivalent active license, two years of experience and $250,000 in insurance; the Board may waive the exam.