How to Become a Private Investigator in Montana (2026)

Last updated: February 26, 2026

Becoming a licensed private investigator in Montana is a serious professional commitment requiring documented experience, a written examination, an FBI fingerprint background check, and mandatory liability insurance. Montana’s private investigator licensing is administered by the Montana Board of Private Security, operating under the DLI Business Standards Division. The full PI license requires 5,400 cumulative hours (roughly three years of full-time experience) in qualifying investigative work. A PI Trainee pathway is available for those who are still building their hours under the supervision of a licensed Montana PI agency. This guide covers every requirement step by step, with official fees and contact information current as of 2026.

Private Investigator Requirements in Montana at a Glance

Requirement	Agency	Cost	Timeline
LLC Formation (for PI agency)	Montana Secretary of State	$35 (online)	3-5 business days
PI License Application Fee	MT Board of Private Security	$80 (non-refundable)	6-10 weeks (background check processing)
PI License Renewal Fee (annual)	MT Board of Private Security	$160/year	Renewal period: January 1 – March 1
FBI Fingerprint Background Check	Montana DOJ / FBI	Included in application process	2-6 weeks
Written Licensing Exam (pass required)	MT Board of Private Security	Included with application	Scheduled after application review; 70% passing score
Required Experience	Self-documented	No fee (time-based)	5,400 cumulative hours in qualifying PI work
General Liability Insurance ($500,000)	Private insurer	$800-$2,500/year typical	Must be in force at time of application
Firearms Endorsement (optional)	MT Board of Private Security	$50 application + $50 annual renewal	Requires approved firearms training + annual requalification

How to Become a Private Investigator in Montana (Step by Step)

Step 1: Verify Basic Eligibility

To qualify for a Montana Private Investigator license under MCA Title 37, Chapter 60, you must:

• Age: At least 18 years old
• Education: High school diploma or GED equivalent
• Background: Pass an FBI fingerprint criminal background check. Certain criminal convictions will disqualify an applicant – the Board reviews these on a case-by-case basis for many non-violent offenses, but some convictions are automatically disqualifying.

Step 2: Accumulate 5,400 Hours of Qualifying Experience

This is the most demanding requirement for the full PI license. You must document 5,400 cumulative hours of experience in qualifying investigative activities. This is approximately 3 years of full-time investigative work at 40 hours/week.

Qualifying experience includes:

• Employment as a private investigator under a licensed PI or PI agency
• Law enforcement experience (police, sheriff, federal agent)
• Military intelligence or investigative work
• Insurance claims investigation
• Other investigation-related professional work that the Board considers equivalent

Education/training substitution: Up to half of the 5,400 hours (up to 2,700 hours) may be substituted with approved education or training related to investigative work. Contact the Board to confirm what training programs qualify.

PI Trainee option: If you do not yet have 5,400 hours, you can work as a PI Trainee under a licensed Montana PI agency while accumulating your hours. The Trainee license has the same age, education, and background check requirements as the full license, but does not require the full experience threshold. The Trainee must be registered under and supervised by a licensed Montana PI agency.

Step 3: Secure the Required Liability Insurance

Montana requires all licensed private investigators to maintain a minimum of $500,000 per occurrence on a commercial general liability (CGL) policy that includes personal injury coverage. This is a firm mandatory requirement – the Board will not issue or renew your license without current proof of qualifying insurance coverage.

PI liability insurance covers claims arising from:

• Invasion of privacy claims from investigation subjects
• Defamation/libel claims from inaccurate report content
• Trespassing claims during surveillance operations
• Client disputes over investigation results
• Bodily injury during field operations

Obtain a certificate of insurance (COI) naming the Montana Board of Private Security as a certificate holder. Premiums for $500,000 PI liability policies typically range from $800 to $2,500/year depending on your revenue and case types. The insurance must remain in force for the entire license period; a lapse in coverage may result in license suspension.

Step 4: Form Your PI Business Entity

If you will operate as a PI agency (employing other investigators or accepting clients as a business), form an LLC with the Montana Secretary of State at biz.sosmt.gov for $35. The LLC structure adds an additional layer of liability protection beyond your CGL insurance.

Get a free EIN from the IRS (irs.gov) for banking, taxes, and any employees. Obtain a local business license from your city or county clerk.

Step 5: Submit Your License Application

Apply through the Montana Board of Private Security:

• Board website: boards.bsd.dli.mt.gov/private-security
• PI license page: boards.bsd.dli.mt.gov/private-security/license-information/private-investigator
• PI Checklist (updated December 10, 2025): boards.bsd.dli.mt.gov/_docs/psp/pi-checklist.pdf
• Online licensing portal: ebiz.mt.gov/pol
• Phone: (406) 444-6880
• Email: DLIBSDHELP@MT.GOV
• Address: 301 S. Park Avenue, 4th Floor, Helena, MT 59620

Application fee: $80 (non-refundable). Your application package should include:

• Completed application form
• Detailed experience documentation (employer verifications, hours log)
• Education records (diploma/GED)
• Certificate of insurance ($500,000 CGL coverage)
• Fingerprint card authorization for FBI background check
• Any additional documentation listed on the current PI Checklist

Step 6: Pass the FBI Background Check

All PI license applicants must submit to an FBI fingerprint-based criminal background check processed through the Montana Department of Justice. The Board coordinates this process as part of your license application. Results typically take 2-6 weeks. You will be notified of the results and whether any issues require review before your license is issued.

Step 7: Pass the Written Licensing Examination

Montana requires PI license applicants to pass a written examination covering:

• Montana Code Annotated (MCA) Title 37, Chapters 1 and 60: The statutory authority governing private security and PI licensing in Montana.
• ARM 24, Chapter 182: The administrative rules for the Board of Private Security.

Minimum passing score: 70%

The exam covers Montana PI law, licensee conduct requirements, prohibited activities, reporting obligations, and administrative processes. Study the current version of the statutes and administrative rules, available free online at leg.mt.gov (MCA Title 37) and rules.mt.gov (ARM 24.182).

License Renewal

Montana PI licenses renew annually. The renewal period is January 1 through March 1 each year.

• Annual renewal fee: $160
• Maintain current CGL insurance ($500,000 minimum) – certificate required at renewal
• No continuing education requirement specified in current Board rules

Optional: Firearms Endorsement

Montana PIs who wish to carry a firearm while working may obtain a Firearms Endorsement:

• Application fee: $50
• Annual renewal fee: $50
• Requires completion of a Board-approved firearms training program
• Annual requalification on the range required to maintain the endorsement
• Contact the Board for the list of approved firearms training programs

Cost to Start a Private Investigation Business in Montana

Item	Cost	Notes
LLC Formation	$35	Online at biz.sosmt.gov
PI License Application Fee	$80	Non-refundable; one-time initial application
PI License Annual Renewal	$160/year	Renewal period January 1 – March 1
General Liability Insurance ($500K) – annual	$800-$2,500	Mandatory; $500,000 occurrence-form CGL required
Firearms Endorsement (optional)	$50 + $50/year renewal	Requires Board-approved firearms training + annual requalification
Local Business License	$25-$100	Required by most Montana cities
Surveillance Equipment	$1,500-$10,000+	Cameras, GPS trackers, database subscriptions
Vehicle (reliable, unmarked)	$5,000-$30,000+	Essential for surveillance work
Errors and Omissions Insurance (optional but recommended)	$500-$1,500/year	Covers professional liability beyond standard CGL

Estimated total startup cost: $10,000-$45,000 (significantly reduced if you already own a suitable vehicle and equipment)

Related Montana Business Guides

• How to Start an HVAC Business in Montana
• How to Start a Hair Salon in Montana
• How to Start a Landscaping Business in Montana

← Back to all Montana business guides

Frequently Asked Questions

How much experience do I need to get a PI license in Montana?

Montana requires 5,400 cumulative hours of qualifying investigative experience – approximately 3 years of full-time PI work. Up to half (2,700 hours) may be substituted with approved education or training related to investigative work. If you have not yet reached 5,400 hours, you can work as a PI Trainee under a licensed Montana PI agency while accumulating your experience, provided you meet the age, education, and background check requirements.

What is the insurance requirement for a Montana PI license?

Montana requires a minimum of $500,000 per occurrence on an occurrence-form commercial general liability (CGL) policy that includes personal injury coverage. This is a firm mandatory requirement – the Board will not issue or renew a PI license without current proof of qualifying insurance. The policy must remain in force throughout the license period. A lapse in coverage may result in license suspension.

What does the Montana PI licensing exam cover?

The written examination covers Montana Code Annotated (MCA) Title 37, Chapters 1 and 60 (the statutes governing PI licensing) and ARM 24, Chapter 182 (the Board’s administrative rules). The minimum passing score is 70%. The exam focuses on Montana PI law, licensee conduct requirements, prohibited activities, and Board administrative processes. Study materials are the actual statutes and rules, available free at leg.mt.gov and rules.mt.gov.

How much does a Montana PI license cost?

The initial application fee is $80 (non-refundable). Annual renewal is $160 per year, with the renewal period running January 1 through March 1. An optional Firearms Endorsement costs $50 to apply for and $50 per year to renew. The mandatory $500,000 CGL insurance policy is an additional annual cost (typically $800-$2,500/year depending on your operation).

Can I carry a firearm as a Montana PI?

Yes, with a Firearms Endorsement from the Board of Private Security. The endorsement requires: completing a Board-approved firearms training program, paying a $50 application fee, and passing annual requalification on a shooting range ($50 annual renewal fee). The endorsement is in addition to, not a substitute for, any applicable firearm carry permits or laws. Contact the Board at (406) 444-6880 for the current list of approved training programs.