How much does a private investigator cost? In 2026, the typical hourly rate for a licensed private investigator in the United States is $50 to $200, with most cases falling in the $75 to $125 range. The hourly rate is the headline number, but the total cost of a case depends on the retainer, the number of hours worked, the surveillance equipment used, mileage, court appearance fees and the format of the final report. A simple background check might cost $200 to $500. A multi-week infidelity surveillance case can run $3,000 to $10,000.
Pricing varies by region, by specialty and by the experience of the investigator. A solo investigator in a small market may charge $50 per hour. A licensed PI with a digital forensics specialty in a major city may charge $250 per hour. A national agency with multiple agents available 24/7 will sit somewhere in between. The best way to predict your bill is to define the case clearly up front, ask three or four investigators for written estimates, and pick the one whose estimate matches your actual scope.
This guide explains how private investigators price their services, what the retainer is for, how case-type pricing differs (infidelity vs. background check vs. corporate fraud), the expenses that get added to the hourly rate, and the tips that experienced clients use to control costs without compromising results. We cover the big four cost levers — hours, hourly rate, expenses and reporting — and we close with red flags that tell you when a quote is too good to be true.
Hiring a private investigator is a buying decision, not a service request. Approach it the way you would approach hiring a contractor for a major home renovation: get multiple quotes in writing, ask about hidden expenses, verify licensing, read the contract carefully and never pay the entire fee up front. The investigator who walks you through their pricing before they accept the case is usually the one who will deliver a bill that matches the estimate at the end.
Hourly rates for licensed private investigators run $50 to $200, with $75 to $125 typical. Most PIs require a retainer of $1,000 to $2,500 paid up front. Expenses (mileage, equipment, court appearances, database fees) are billed in addition to the hourly rate. A simple background check costs $200 to $500. A multi-week infidelity surveillance runs $3,000 to $10,000. Always get a written contract before paying any retainer.
The hourly rate covers the investigator's time only. When the PI is sitting in a vehicle watching a subject's house, that is billable time. When the PI is driving from one location to another following the subject, that is billable time. When the PI is back at the office writing the report or transferring video files, that is billable time. The clock generally runs from the moment the investigator leaves their starting point until the moment they return, with mileage billed separately at the IRS standard rate ($0.67 per mile in 2026) or a fixed travel fee.
The retainer is a deposit, not an additional fee. A $2,000 retainer is applied against the first hours worked at the agreed hourly rate; if the investigator works 20 hours at $100 per hour, the $2,000 retainer is exhausted exactly. If the work runs over the retainer, the investigator either bills you for the additional time or stops work until you replenish the retainer. Read the contract carefully — some agencies charge a non-refundable case-opening fee on top of the retainer, while others apply 100% of the retainer to billable hours.
Most cases break into three phases: scoping, fieldwork and reporting. Scoping includes the initial consultation, contract drafting and case planning, often included in the retainer or a flat fee of $200 to $500. Fieldwork is the bulk of the cost — surveillance, interviews, database searches, document retrieval. Reporting includes drafting the final report, organizing evidence, preparing for any court testimony and case closeout. Reporting typically adds 10% to 20% on top of the fieldwork hours.
Surveillance is the most common service, the most variable in cost, and the easiest to misjudge from a distance. A single-day, eight-hour surveillance run with a single investigator at $100 per hour is $800 in time alone, plus $50 to $100 in mileage, plus equipment fees if specialized cameras or vehicles are required. A two-week infidelity case typically requires 30 to 60 hours of fieldwork to capture conclusive evidence, putting the total in the $3,000 to $7,000 range before reporting.
The most common model. Rates from $50 to $200 per hour. The investigator bills only for time worked, with mileage and expenses added separately. Common for surveillance, interviews and complex investigations where the total time is unpredictable up front.
Used for predictable scopes — comprehensive background check ($200 to $1,000), single-day surveillance ($800 to $1,500), skip trace ($150 to $500), document retrieval ($100 to $300). Flat fees give the client cost certainty and the PI a profit margin on efficient work.
Standard for cases of unknown scope. Client pays $1,000 to $2,500 up front, applied against billable hours at the agreed rate. The investigator works until the retainer is exhausted, then either bills additional hours or stops until the retainer is replenished by the client.
Used by corporate clients for ongoing due diligence, brand protection and pre-employment screening. Monthly fees from $1,500 to $10,000 cover a defined volume of work. Common with PI firms that maintain a portfolio of corporate clients on retainer year-round.
Case type drives the hourly rate. Surveillance and infidelity work is the standard rate ($75 to $125 in most markets). Background checks and skip traces are often flat-fee. Digital forensics — recovering deleted text messages, analyzing computers, tracking cryptocurrency — is the most expensive specialty, with rates from $200 to $400 per hour because of the equipment and training required. Corporate fraud and white-collar investigations sit between the two, typically $150 to $250 per hour with a heavy retainer.
Geographic location is the second largest pricing factor. New York City, San Francisco, Los Angeles, Boston, Washington DC and Miami are the most expensive markets, with rates 30% to 60% above the national average. The Midwest, South and rural areas run 20% to 30% below the average. A $100/hour rate is competitive in Phoenix; the same investigator with the same experience would charge $175 in Manhattan. Distance from the investigator's base also matters — most PIs charge a travel premium beyond a 20-mile radius from their office.
Experience and credentials drive the third tier of pricing. A retired law enforcement officer (state police, FBI, sheriff's deputy) charges 20% to 40% more than a PI without that background, and the premium is usually worth it for cases that may go to court. A PI with a CFE (Certified Fraud Examiner) credential charges more for fraud work. A PI with a CISSP charges more for cybersecurity-related cases. Specialty credentials are tied to specialty case types and signal real expertise rather than just years in the business.
Urgency adds a multiplier. A standard case worked during business hours bills at the standard rate. A rush case, evening surveillance or weekend work typically commands a 25% to 50% premium. Cases that require immediate response — a missing person, an active fraud investigation, an emergency child custody matter — may require a same-day retainer of $5,000 or more. Plan ahead when you can; the urgency premium is real money.
$200 to $1,500 depending on depth. A basic check (criminal records, civil records, addresses, employment) runs $200 to $500. A comprehensive check (financial, social media, references, business associations, hidden assets) runs $1,000 to $2,500. Pre-employment background checks have specific FCRA compliance requirements and use specialized vendors.
$2,500 to $10,000 typical. Most cases require 20 to 60 hours of surveillance over 2 to 6 weeks to capture conclusive video and photo evidence. Rates of $80 to $125 per hour are common, plus mileage and equipment. The investigator delivers a written report with timestamps, video clips, photos and a sworn statement that meets evidentiary standards.
$3,000 to $8,000. Requires careful surveillance of the other parent's behavior, schedule and supervision of children. Reports must be courtroom-ready with clear chain of custody. Many family law attorneys keep a list of preferred PIs because of the specific evidentiary requirements and credentialing for testimony.
$1,500 to $7,500 for a basic skip trace through detailed fieldwork. Database searches and skip tracing are inexpensive ($200 to $500). Active fieldwork — knocking on doors, interviewing former employers, checking shelters and hospitals — runs the full hourly rate. Cases involving cross-state or international searches cost more.
Expenses billed separately on top of the hourly rate include mileage, equipment, database access, court fees, expert witness fees and travel. Mileage is billed at the IRS standard rate ($0.67 per mile in 2026) or a flat travel fee per case. Equipment fees cover specialized cameras, GPS trackers, drones, lock-picking kits, body cams and other gear that is shared across multiple cases. Database access — LexisNexis, TLOxp, Tracers, IRBSearch — is essential for skip tracing and background work and is generally billed at cost.
Court appearance fees are a separate line item. If your investigator is subpoenaed to testify or asked to provide expert testimony, expect a half-day or full-day rate of $400 to $1,500. Some PIs include up to 4 hours of court time in their initial retainer; others charge separately from the first minute. Discovery depositions, where the PI is questioned by opposing counsel before trial, are billed at the same rate. Plan ahead when a case is likely to involve litigation.
Equipment surcharges depend on the gear required. A two-week GPS tracker rental adds $200 to $500. Drone surveillance for a single day adds $500 to $1,500 depending on operator certification and equipment. Specialty vehicles for covert surveillance — a vehicle with tinted windows and concealment compartments — add $300 to $500 per day. The investigator should disclose required equipment in the case plan and price it before fieldwork begins.
Database fees are the easiest to overlook. A basic skip trace search runs $25 to $75 in database costs alone before any human time is added. A comprehensive person-of-interest report on an individual costs $50 to $250 in raw data fees. Investigators typically pass these costs through at cost or with a small markup. Ask whether your PI includes data fees in the hourly rate or bills them separately, and get the answer in writing.
Controlling the cost of a PI engagement starts with scoping the case. Before you hire anyone, write down what you want to know, what you suspect, what evidence already exists, and what outcome you are trying to reach (divorce settlement, criminal report, insurance claim, internal HR action). The clearer the goal, the tighter the scope, and the lower the bill. A vague "find out what's going on" almost always costs twice what a defined "capture evidence of presence at a specific location during specific hours" costs.
Set a budget cap and put it in writing. Ask the investigator to alert you when 50% and 80% of the retainer is consumed so you can decide whether to authorize additional work or change strategy. Many cases conclude with an early break — the surveillance produces the needed evidence in the first week, or the database search closes the question without fieldwork. Authorizing $5,000 of work and stopping at $2,400 is a smart outcome, not a half-finished one.
Use the right service for the right question. A simple background question (does X have a criminal record? does Y own this property?) needs a database search, not surveillance. A specific behavioral question (is X meeting Y at this address?) needs surveillance, not databases. Mismatching the service to the question wastes hours. The PI should help with this scoping in the consultation; if they cannot articulate what kind of evidence will answer your question, find a different one.
Ask for the written report format up front. Some PIs deliver a polished narrative report with embedded photos and video links. Others deliver a daily log of timestamps and observations with separate evidence files. The polished version takes more reporting hours and adds 10% to 20% to the bill. If you only need raw evidence for an attorney's use, save the money and ask for the operational log instead. The attorney will handle the narrative for the case file.
Licensing varies dramatically by state. California requires a state-issued PI license through the Bureau of Security and Investigative Services, with 6,000 hours of experience and a written exam. Texas requires a license from the Department of Public Safety with 6,000 hours and an exam. Five states (Wyoming, South Dakota, Colorado, Mississippi and Idaho) require no state license at all, although local city or county licenses may apply. Always verify the license number on the state regulator's public lookup before paying any retainer.
Insurance is the second credential to check. A licensed PI typically carries general liability ($1 million to $2 million) and professional liability errors and omissions coverage. The professional liability coverage protects clients against negligence claims if the investigator's work damages a case or causes harm. Confirm coverage in writing before signing the contract. Reputable PIs are happy to share certificates of insurance; reluctance is a warning sign.
The relationship between the PI and your attorney matters. If you are working with legal counsel, the attorney can hire the PI directly under the attorney's work product doctrine, which protects the investigation from discovery in litigation. PIs hired this way bill the attorney, who then bills you. The protection is significant for cases likely to end up in court, and most divorce, custody and fraud cases benefit from this structure. Discuss with your attorney before hiring directly.
Working with multiple investigators on the same case is common in larger matters. Surveillance teams of two or three agents allow rotation during long stakeouts and reduce the chance of being noticed by the subject. Each agent bills the standard hourly rate, so a team adds proportional cost. The benefit is faster case completion and stronger evidence — three agents can often capture in 20 hours what one agent would need 60 hours to capture, depending on the subject's schedule and counter-surveillance awareness.
Discount providers, online "PI services" and gig-economy investigators are a fourth category to consider carefully. Some online services offer flat-fee background reports for $25 to $100 — these are aggregated database reports, not investigations, and the quality varies wildly. Cheap fieldwork through unlicensed individuals is a serious risk: any evidence collected by an unlicensed investigator may be inadmissible in court and can expose the client to liability. The savings disappear the moment a judge rules the evidence inadmissible.
Premium agencies — those charging $200 per hour and up — earn their rate when the case actually requires premium work. Multi-jurisdictional cases, executive protection elements, complex financial fraud, intellectual property theft and matters involving threats or violence all justify the premium tier. For a straightforward custody dispute or infidelity question, a competent solo investigator at $100 per hour delivers the same usable evidence at a fraction of the cost.
Major coastal cities run 30% to 60% above national average. Midwest, South and rural areas run 20% below. Investigators in San Francisco or Manhattan charge $150 to $250 per hour for the same work that costs $80 to $120 per hour in mid-sized markets like Phoenix, Charlotte or Indianapolis.
Retired law enforcement and federal agents charge a 20% to 40% premium reflecting their training, contacts and credibility on the witness stand. Specialty credentials — CFE, CISSP, accident reconstruction — add another 10% to 25% on top, justified by case types that require those specific skills.
Multi-jurisdictional cases, corporate fraud, digital forensics and matters involving travel push hourly rates and total cost up sharply. Single-location surveillance and basic background work stay in the standard rate band. Match the investigator's specialty to your case type for the best price-to-value.
Standard business-hours cases bill at the base rate. After-hours, weekend or rush cases command a 25% to 50% premium. True emergency response — same-day retainer required, full team mobilized — may add a flat surcharge of $1,000 to $5,000 for the case-opening on top of the higher rates.
The contract is your single most important cost control. A well-drafted PI contract specifies the hourly rate, the retainer amount, the case scope, the budget cap, the expense categories and markup percentages, the reporting deliverable and timeline, the cancellation policy and the dispute resolution mechanism. Most state licensing boards require licensed PIs to provide a written contract; ask for it, read it, negotiate any unclear terms, and keep a copy.
Watch for vague language about expenses. A clause that says "reasonable expenses will be billed at cost" is fine if it is paired with a dollar cap or a requirement for client approval above a threshold ("any single expense over $250 requires written approval"). Without the cap, expenses can balloon. Watch also for clauses that allow the investigator to bill travel time at the hourly rate without geographical limits — that can turn a local surveillance case into a four-hour-per-day commute charge.