To hire a private investigator, verify the person holds a current state license, confirm they carry insurance and have direct experience with your type of case, and sign a written contract covering scope, fees, and deliverables before any work starts. Most states require PIs to be licensed, hourly rates typically run $85 to $200, and the legal limits on what an investigator can do also bind you as the client if you knowingly ask them to cross a line.
What You’re Actually Hiring a PI to Do
Private investigators are civilians who gather information and evidence for individuals, attorneys, and businesses. They have no police authority and cannot make arrests.1Rasmussen University. Private Investigator vs. Police Detective: Making the Case Their work runs through public records, databases, interviews, and surveillance.
Common assignments include:
- Background checks covering criminal records, employment, education, and public records
- Surveillance in suspected infidelity, insurance fraud, or custody cases
- Locating missing persons, biological relatives, witnesses, or debtors
- Corporate work on theft, embezzlement, IP violations, or employee misconduct
- Asset searches, often tied to divorce or debt collection
- Litigation support: evidence gathering, witness interviews, and reports for court
Some investigators specialize; others handle a broad mix. Ask directly whether the person has handled cases like yours, because the field is not interchangeable.
Verify the License Before Anything Else
The vast majority of states require private investigators to hold a state-issued license. Typical requirements include a background check, minimum investigative experience or education, and in many states a surety bond ranging roughly from $5,000 to $100,000 depending on the jurisdiction.
A handful of states do not require state-level PI licensing: Alaska, Idaho, Mississippi, South Dakota, and Wyoming. Some of these still require local permits or business registration. Indiana licenses firms but not individual investigators, and Pennsylvania handles licensing at the county level through the clerks of courts. If you’re in one of those places, you lose the standardized safety net and your own vetting has to work harder.
To verify a license, find your state’s licensing agency online. The responsible agency varies by state: a state police division, a department of public safety, a consumer affairs bureau, or a professional licensing board. Most maintain a searchable database where you can confirm current license status and check for disciplinary history. If you can’t find a database, call the agency directly with the investigator’s name and license number.
How to Vet Candidates Beyond the License
Attorney referrals are the strongest starting point, especially for anything that might end up in court. Family, criminal defense, and civil litigation attorneys work with PIs regularly and know who produces usable evidence. Professional associations, including the National Association of Legal Investigators (NALI) and the National Council of Investigation and Security Services (NCISS), also maintain member directories.
Once you have a shortlist, run each candidate through an initial consultation and ask about:
- Direct experience with your type of case, not just years in the business
- The methods they plan to use, and whether those methods are legal in your state
- General liability or errors-and-omissions insurance, whether or not your state requires it
- Willingness and experience testifying in court, if litigation is possible
- The kind of reports, photos, or video you’ll receive, and how often
- References from past clients or attorneys, understanding some cases are confidential
Pay attention to how the consultation itself feels. Anyone who promises guaranteed results, claims they can get any piece of information, or dodges questions about legal limits is telling you something important. A professional will describe what is and isn’t realistic.
What It Costs
Fees depend on the type of work, complexity, and location. Most PIs use one of three billing structures, sometimes in combination.
Hourly Rates
Standard surveillance runs roughly $85 to $150 per hour. In major metropolitan areas like New York or Los Angeles, $125 to $200 per hour is typical. Specialized work such as digital forensics or complex fraud can reach $175 to $300 per hour. Team surveillance with multiple investigators runs $250 to $350 or more per hour because you’re paying several people at once. Rural and suburban rates tend to run $75 to $125, though travel costs can eat the savings.
Retainers
For anything expected to take real time, expect an upfront retainer between $1,000 and $5,000, with the investigator billing against the deposit. Smaller research tasks might run about $500; long surveillance jobs or criminal defense investigations push the number higher. Clarify whether unused funds are refundable and how you’ll get an accounting of hours billed.
Flat Fees
Well-defined tasks often carry flat fees. Basic background checks generally run $200 to $500, and deeper comprehensive checks $500 to $1,500. Person locates and skip tracing typically cost $300 to $600. Executive-level background checks for high-stakes hires can exceed $2,500.
Ask what isn’t in the quoted rate. Mileage, database access fees, equipment, and travel are commonly billed separately. Get every extra spelled out in writing so the final invoice doesn’t shock you.
The Written Contract
No handshake deals. A written agreement protects both sides and becomes the reference point if anything goes sideways. The contract should cover:
- Scope of work — precisely what the investigator will and won’t do
- Fee structure — hourly, retainer, flat, or a mix, with any spending cap you want
- Expense policy — what’s included and what gets billed separately
- Timeline or milestones, even if the end date is uncertain
- Confidentiality of your information and the investigation’s results
- Deliverables — reports, photos, video, and whether the PI will testify
- Termination terms and the fate of any unused retainer
Read the whole thing before signing. If a provision is unclear, ask. A reputable investigator won’t push you through this step.
The Legal Line You Can’t Let Them Cross
The biggest misconception about PIs comes from television: that they operate in legal gray areas. In reality, the limits are sharp, and if you knowingly direct an investigator to break the law, you can face the same criminal and civil exposure they do.
Investigators cannot trespass, wiretap phone calls, or access private accounts without authorization.2World Association of Professional Investigators. Five Things That A Private Investigator Can and Can Not Do They cannot impersonate law enforcement or use false pretenses to pry financial records out of a bank. Federal law makes it a violation to obtain someone’s financial records through false pretenses, and it also prohibits hiring someone else to do it on your behalf, so a client who asks a PI to pose as an account holder is violating the same statute.3Office of the Law Revision Counsel. United States Code Title 15 Section 6821 Motor vehicle records held by state DMVs are similarly restricted; licensed PIs can access them, but only for purposes federal law specifically allows, such as investigation in anticipation of litigation or serving process.4Office of the Law Revision Counsel. United States Code Title 18 Section 2721 If a background report will be used for employment or tenant screening, the Fair Credit Reporting Act’s rules on permissible purpose and adverse-action notice likely apply.5Federal Trade Commission. Fair Credit Reporting Act
Recording laws add another wrinkle. Most states let one party to a conversation record it without telling the other; a smaller group, including California, Florida, Illinois, Maryland, and Massachusetts, require all parties to consent. When a case crosses state lines, the stricter rule usually wins, and that applies to you if you’re doing any recording yourself.
The practical takeaway: hire someone licensed and insured, put everything in writing, and never pressure an investigator to cut a corner. Evidence obtained illegally often gets thrown out anyway, so you’d be paying for material you can’t use, on top of the legal risk.
If Something Goes Wrong
If you believe your investigator has acted unethically or illegally, you have options. In states with licensing, the licensing agency accepts complaints and can suspend or revoke a license. Most agencies offer online complaint forms and phone hotlines. You can also file with your state’s consumer protection division or attorney general’s office. If the conduct caused financial harm, talk to an attorney about civil claims. If you witnessed clearly criminal conduct such as trespassing or illegal wiretapping, report it to local law enforcement.
Save everything — contracts, invoices, reports, texts, and emails. That paper trail is what establishes both what was agreed to and what actually happened, and it’s what any complaint, refund demand, or lawsuit will turn on.