How to Become a Licensed Private Investigator in Missouri

To become a licensed private investigator in Missouri, you must be a U.S. citizen, carry at least $250,000 in general liability insurance, document around two years of qualifying investigative experience, pass a 100-question written exam, and submit a notarized application with fingerprints, photographs, and a $500 fee to the Board of Private Investigator and Private Fire Investigator Examiners in Jefferson City.¹ Plan for the whole process to take several months once you qualify on paper.

Who Can Apply

Section 324.1108 of the Missouri Revised Statutes sets the minimum bar. You must be a United States citizen. You must carry at least $250,000 in business general liability insurance, and if you will have employees, workers’ compensation coverage on top of that. The board can add further qualifications through its administrative rules, and it has.²

If you intend to work as an employee of a licensed PI agency rather than solo, you also have to be at least 21.³

The $250,000 policy is not a one-time cost. You maintain it for as long as you hold the license, so budget it as an ongoing business expense before you commit.

Experience and Education

The statute requires a “verified statement of the applicant’s experience qualifications” and leaves the specifics to the board’s rules.² Under those rules, most applicants need to show at least two years of investigative work totaling roughly 4,000 hours. The board verifies the hours through payroll records or signed affidavits from supervisors who can vouch for the nature and duration of the work.

You don’t have to have spent all of that time working under another PI. The rules recognize substitutes. A degree from an accredited university in a relevant field, or prior service as a commissioned law enforcement officer, can cover some or all of the experience requirement. This is the path most career-changers from policing, the military, or criminal justice programs take in.

If you already hold an equivalent license in another state, Section 324.1110 opens a reciprocity route. You still need Missouri’s minimum insurance and have to show at least two years of experience while carrying $250,000 in general liability coverage during that period. The board may waive the exam for reciprocity applicants.⁴

What Can Disqualify You

Section 324.1112 gives the board several grounds to deny an application. The board can turn you down for a conviction or guilty or nolo contendere plea, under federal, state, or foreign law, for an offense directly related to the duties of a private investigator, even if no sentence was imposed. Other grounds include a PI license denied or revoked in another state, falsifying evidence or giving false testimony, a history of alcohol or drug dependency or abuse, illegal drug use or trafficking, working as a PI in Missouri without a license after August 28, 2007, and making false statements on the board application itself.⁵

A past problem is not automatic denial. The board is required to consider evidence of rehabilitation.⁵ If you have a conviction in your history, come in with documentation: proof the sentence was completed, a clean record since, letters from employers or supervisors, and anything else that shows the pattern has changed.

The Exam

Once you meet the eligibility and experience requirements, you sit for the board’s written exam. It runs monthly at the board’s Jefferson City office, generally starting at 1:00 p.m., with one exam per month scheduled from January through December 2026.⁶

The exam is 100 questions in two hours, broken down as:

50 questions on Missouri statutes governing private investigations
25 questions on the board’s administrative rules
25 questions on general investigative practice

Passing is 70% or better. The exam fee is $80, paid when you submit the exam application.⁶ Because three-quarters of the questions test Missouri-specific law and rules, study Chapter 324, Sections 324.1100 through 324.1148, along with the board’s rules in Title 20 of the Code of State Regulations. The practice questions cover evidence handling, surveillance, privacy limits, and the edges of search and seizure.

The Application Package

The individual application is Form 375-1011, “Application for Licensure — Private Investigator,” downloadable from the board’s website.⁷ It must be signed and notarized. Incomplete submissions are the main cause of delay.

Assemble the following before you mail anything:

Completed and notarized Form 375-1011 with your name, business address, intended business name, license classification, and the verified statement of experience
Two recent photographs in the format prescribed by the board
Two classifiable sets of fingerprints processed through the Missouri State Highway Patrol’s central repository under Section 43.543, which feed both state and federal background checks²
Proof of at least $250,000 in business general liability insurance, plus workers’ compensation if you’ll have employees
$500 nonrefundable application fee by personal check, money order, or cashier’s check payable to the Board of Private Investigator and Private Fire Investigator Examiners; credit cards are not accepted for the application fee⁸

The board fees alone come to $580 between the application and exam. Fingerprint processing, photographs, and your insurance premium sit on top of that.

Where to Send It and What Happens Next

Mail the completed package to the Board of Private Investigator and Private Fire Investigator Examiners, PO Box 1335, Jefferson City, MO 65102-1335.⁹ Staff check the submission for completeness, wait on background check results from the State Highway Patrol and the FBI, confirm your insurance, and verify that every signature and notarized section is where it needs to be.

The board does not publish a guaranteed turnaround. Plan on several weeks at minimum. Once the board confirms you meet every statutory requirement, you receive your credentials and can begin offering investigative services in Missouri.

Individual License Versus Agency License

An individual PI license authorizes only you to investigate. To open a firm and hire other investigators, you need a separate agency license, and it must be held by someone who already carries an individual PI license.¹⁰

Once an agency is licensed, its employees still apply for their own credentials and still have to meet the board’s requirements, but the experience requirement is waived for agency employees, and they can begin working as soon as the agency submits their applications.¹⁰ For someone who cannot yet meet the two-year threshold, hiring on with a licensed agency is the practical way in.

The forms track those distinctions: 375-1011 for individual applicants, 375-1012 for agency investigator employees, and 375-1013 for the agencies themselves.⁷

Keeping the License Current

Missouri PI licenses renew every two years. Licensed private investigators complete 16 hours of continuing education before each renewal deadline, which falls on April 30 of every even-numbered year. Agency employees have a lighter load at 8 hours, due June 30 of the same even-numbered year.¹¹

The board does not publish a full pre-approved course list. If you want a specific class to count, submit a course review form with a $10 review fee per course, and confirm the credit before relying on it at renewal.

What the License Does Not Let You Do

Working without a Missouri license is a Class A misdemeanor for a first offense and a Class D felony for a second or subsequent violation. Knowingly falsifying the fingerprints or photographs required for the application is a Class D felony on its own, regardless of whether it’s a first offense. Any unlicensed work you did in Missouri after August 2007 also becomes a standalone ground for the board to deny a later application.⁵

Holding the license does not clear you to use every investigative technique. Federal law draws its own lines. Under 15 U.S.C. § 6821, it is illegal to obtain a customer’s financial records from a bank or financial institution through false or misleading statements to staff, misrepresentation to the customer, or forged documents. Calling a bank while pretending to be the account holder, a law enforcement officer, or a government official to pull account details violates the statute.¹²

There is one narrow carve-out for state-licensed investigators: obtaining financial information this way when reasonably necessary to collect court-ordered child support from someone found delinquent by a federal or state court, provided a court has authorized the action and the technique does not violate any other federal or state law.¹² Outside that scenario, pretexting for bank records creates federal exposure that no state license shields you from. Impersonating a federal officer, verbally or with a fake badge, carries its own consequences under 18 U.S.C. § 912. Presenting yourself as a licensed PI is not the same as letting someone believe you carry government authority, and the difference matters from your first case forward.

1
Missouri Department of Professional Registration. Board of Private Investigator and Private Fire Investigator Examiners
2
Missouri Revisor of Statutes. Missouri Code 324.1108 – Application for Licensure, Contents – Qualifications
3
State of Missouri. Board of Private Investigator and Private Fire Investigator Examiners Chapters 324.110 to 324.1148 – Section: 324.1116 Agency Hiring Criteria
4
Missouri Revisor of Statutes. Missouri Code 324.1110 – Reciprocity
5
Missouri Revisor of Statutes. Missouri Code 324.1112 – Denial of a Request for Licensure, When
6
Missouri Department of Professional Registration. Board of Private Investigator and Private Fire Investigator Examiners – Exam Information
7
Missouri Department of Professional Registration. Board of Private Investigator and Private Fire Investigator Examiners – Application for Licensure Forms
8
Missouri Department of Professional Registration. Instructions for Completing the Application for Licensure
9
Missouri Department of Professional Registration. Application for Licensure – Private Investigator Form 375-1011
10
Missouri Revisor of Statutes. Missouri Code 324.1114 – Fee Required – License for Individuals Only, Agency License Must Be Applied for Separately
11
Missouri Department of Professional Registration. Private Investigator Renewal and Continuing Education Information
12
Office of the Law Revision Counsel. 15 U.S. Code 6821 – Privacy Protection for Customer Information of Financial Institutions