Maine Private Investigator License Requirements

Maine offers five different ways to meet its experience requirement, from three years in the military to a sponsorship program plus 60 college credits.

Maine PI license at a glance

Item	Detail
Regulator	Maine State Police, Weapons and Professional Licensing
Law	32 M.R.S. 8105
Age	21, U.S. citizen or resident alien, high school or equivalent
Character	Good moral character, no conviction for a crime punishable by 1+ years
Exam	Required, set by the Chief
Experience (one of)	Investigative assistant sponsorship plus 60 postsecondary credits; 3 years as a sworn member of the U.S. armed forces or a federal investigative agency; 3 years holding a substantially equivalent out-of-state license with reciprocity; 3 years as a state or local law enforcement officer; or 6 years combined work and education including 2 years in a nonclerical law or criminal justice job
Military	No dishonorable discharge

What’s different here: an out-of-state license held 3 years can satisfy the experience requirement if that state offers reciprocity.

Maine PI license FAQ

Can military service count?

Yes, 3 years as a sworn member counts.

Is there an exam?

Yes.

Verified against: 32 M.R.S. 8105, 8109, 8111, 8117, 8120-A and 8123. Last verified October 23, 2026.

Who regulates private investigators in Maine

The Chief of the Maine State Police administers private investigator licensing under 32 M.R.S. Chapter 89. Section 8105 sets the qualifications, and section 8110-B creates the investigative assistant sponsorship program used by many newcomers.

Maine PI license types

License or credential	Who it is for
Private investigator license	Individuals who meet one of the statutory qualification routes and pass the exam
Investigative assistant	Newcomers working under a sponsoring licensed investigator

How to get licensed in Maine: step by step

1. Choose your qualification route under section 8105.
2. If you’re new, find a licensed sponsor and enter the investigative assistant program while completing college credits.
3. Complete the application with five years of residential history and authorization for criminal record checks.
4. Pass the chief’s exam.
5. Provide the bond and insurance.
6. Pay the license fee: $500 for the original two-year license, with $50 due at application and $450 at issuance (32 M.R.S. 8117).

Carrying a firearm as a Maine investigator

Maine’s PI license doesn’t by itself authorize carrying a firearm on duty. Follow Maine’s firearms laws and confirm any State Police requirements before carrying.

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

A PI license is a business license, not police authority. In Maine, 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, Maine 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.

Maine license term and renewal (32 M.R.S. 8109, 8117)

The first professional investigator license lasts two years, and after that you renew every four years. The original license costs $500 ($50 at application and $450 at issuance). Renewal is $500, refundable if it is denied. If a license has expired and is not renewed within 60 days, the application is treated as an original one with original fees and requirements. An investigative assistant license costs $600 ($200 at application and $400 at issuance).

Maine bond and insurance (8111)

The bond is $10,000 for a Maine resident and $50,000 for a nonresident, and $20,000 for an investigative assistant. It must cover honest business conduct and let anyone injured by the licensee’s intentional, knowing, reckless or negligent act sue on it. Professional investigators also carry liability insurance of at least $10,000 for property damage, $100,000 for injury or death of one person and $200,000 for more than one person, with proof submitted to the chief annually.

Maine handguns and penalties

A licensed professional investigator may carry a handgun while performing duties only after the chief issues a concealed handgun permit under Title 25, chapter 252, and the investigator passes the written firearms test the chief prescribes (8120-A). Violating the chapter or its rules is a civil violation with a fine of not less than $1,000 (8123).

Building a career as a Maine investigator

Knowing the rules in Maine 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 Maine?

Yes. Maine requires private investigators to be licensed by the Chief of the State Police.

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

It depends on your route: three years for law enforcement or federal investigative backgrounds, or a sponsorship program combined with 60 college credits for newcomers.

What is Maine’s investigative assistant program?

A sponsorship program under 32 M.R.S. §8110-B that lets newcomers work under a licensed investigator; combined with 60 related college credits, it qualifies you for a license.

How long does a Maine PI license last?

The first license lasts two years, and after that you renew every four years (32 M.R.S. 8109).

What bond and insurance does a Maine PI need?

A $10,000 bond for a Maine resident or $50,000 for a nonresident, plus liability insurance of $10,000 for property damage, $100,000 for one person and $200,000 for more than one person (32 M.R.S. 8111).