How to Hire a Private Detective in Missouri

Missouri licensing at a glance

Missouri licenses private detectives and agencies through the Board of Private Investigator and Private Fire Investigator Examiners in the Division of Professional Registration.

Step by step: hiring in Missouri

1. Define your question. What do you need to know, and what decision depends on it?
2. Verify licensing. Look the detective up on the Missouri Board of Private Investigator and Private Fire Investigator Examiners website rather than relying on a license number shown in an ad. Confirm the license is active and check the agency license as well as the individual's where both exist.
3. Agree on scope and cost in writing. Know what will be done, for how long, and what you'll receive.
4. Share what you know. Names, addresses, photos, vehicles and schedules save billable hours.
5. Insist on lawful methods. Missouri generally allows a participant to record a phone call (one-party consent), unless it's done with criminal or tortious intent. Detectives shouldn't hack accounts, pretext for records, trespass or track phones.

What affects the cost of an investigation in Missouri

Missouri spans 114 counties and the City of St. Louis. Surveillance in a dense area like Kansas City may call for two detectives to keep a subject in view, while work in rural counties can involve more travel time. Records research that requires courthouse visits in several counties takes longer than searches available online.

Most surveillance is billed hourly plus expenses such as mileage; defined research tasks are often flat-fee. Our cost guide explains pricing in detail.

Questions to ask a Missouri detective

• Are you licensed for work in Missouri, and who will actually do the work?
• How often do you handle matters like mine in Missouri?
• How do you handle recording and tracking under Missouri law?
• Which county courts or records will you need, and how long will that take?
• What will the report include, and could you testify if needed?

More questions are in our list of 15 questions to ask before hiring.

Where we coordinate work in Missouri

Mooney & Boland coordinates investigations throughout Missouri, including Kansas City, St. Louis, Springfield, Columbia and Independence. See private detective services in Missouri for coverage and services.

Local pages for Missouri communities:

Common questions

Sources

• Missouri Board of Private Investigator and Private Fire Investigator Examiners (official regulator)
• Justia: Recording Phone Calls and Conversations, 50-State Survey

Reviewed November 2026.