Private Investigator Cost in 2026: Hourly Rates, Retainers and Real Case Totals

Most private investigators in the US charge between $65 and $150 an hour. Big-city firms and specialists charge $200 or more. Simple jobs like a background check are often sold at a flat price of a few hundred dollars. Surveillance usually runs $600 to $1,600 a day. Most clients spend somewhere between a few hundred and a few thousand dollars in total, and the hourly rate is only part of it. Travel, mileage, database fees, the report and the retainer you pay upfront all affect the final bill.

This guide covers what each type of job typically costs, what goes into the final bill, and how to keep it under control.

Typical rates at a glance

Price surveys don’t agree exactly, because they sample different firms and cities. The table below combines three recent sources: Thumbtack’s booking data, Bark’s 2026 price guide and an April 2026 survey of 32 firms in the 10 largest US metro areas. Use the figures as a starting range, not a quote.

Thumbtack reports that its customers spend about $407 on average, with most jobs between $257 and $750. Those figures lean toward smaller, single-task jobs. Cases that involve several days of surveillance regularly cost $3,000 to $10,000.

What you’ll actually pay for different cases

Infidelity or a cheating spouse

This usually means surveillance, often over evenings or weekends when the person is most likely to meet someone. Budget for at least one or two full days, roughly $1,000 to $3,000, plus mileage. A good investigator will want details first (schedules, vehicles, places the person goes) so the hours aren’t wasted. Infidelity cases almost always start with a retainer.

Child custody

Custody cases need careful, documented surveillance that will hold up in court. The investigator may also have to testify. Expect costs similar to infidelity work or higher, often $2,000 to $5,000 across several days. Testifying is billed separately, usually at the hourly rate or higher, including waiting time at court.

Background checks

A basic criminal-history check can cost as little as $100. A thorough background investigation costs $250 to $900. That covers court records in every county the person has lived in, verifying employment and education, and checking civil suits, liens and bankruptcies. Ask what the price covers. A cheap check is often just an online database search, which you could run yourself.

Finding a person

Tracing a missing relative, an old friend or someone who owes you money usually costs $700 to $1,200 as a flat fee. Some firms charge less if the person turns out to be easy to find, or work on a “no find, reduced fee” basis.

Asset searches

Asset searches are often used before a lawsuit, in divorce or to collect a court judgment. They run from about $500 for property and vehicles to $1,300 to $1,600 for financial and brokerage accounts. A legitimate investigator can find property records, business filings and court judgments. They cannot legally get someone’s bank records by pretending to be the account holder (see below).

Corporate and insurance work

Workers’ compensation and insurance-fraud surveillance, employee misconduct investigations and due diligence are usually billed hourly. These jobs are often handled by larger firms whose rates sit at the top of the range. Many jobs are ongoing and invoiced monthly.

What adds to the hourly rate

• Mileage. Most investigators bill driving separately, typically 45 cents per mile up to the IRS business rate (76 cents per mile since July 1, 2026). On surveillance cases with long drives, mileage adds up quickly.
• Travel time and expenses. If the work is out of town, you may pay for flights, hotels and meals, and sometimes for travel hours too.
• Database and records fees. Professional databases, court copy fees and records requests are often passed on at cost.
• Equipment. Some firms charge for specialist cameras, vehicle rental or bug-sweep (counter-surveillance) gear.
• Report writing and admin. Calls, emails and the final report are often billed at the hourly rate.
• A second investigator. Following someone in a car properly often needs two people, which doubles the hourly cost.
• Court time. Preparing for and giving testimony is billed separately.

Why prices vary so much

• Location. In the 2026 metro survey, average hourly rates ranged from about $95 in Dallas to about $150 in New York and Washington and $153 in Chicago. Bark estimates that big cities charge 25–50% more than rural areas.
• Experience and background. Former police detectives, federal agents and investigators with forensic accounting skills cost more, and often finish faster.
• Complexity and urgency. Rush jobs, weekends and nights, or cases needing several investigators all push the price up.
• Billing structure. Hourly billing is open-ended. A flat fee gives you certainty for well-defined tasks.

How retainers work

For anything beyond a flat-fee task, expect to pay a retainer before work starts. That’s a deposit, commonly $500 to $2,500, which the investigator draws against as hours and expenses build up. With a reputable firm, any unused balance is refunded when the case closes. If the work goes past the retainer, you’ll be asked to top it up or billed for the rest.

Before you sign, get the retainer terms in writing:

• the hourly rate and the mileage rate
• what counts as a billable expense
• how often you’ll get updates and invoices
• whether unused money is refunded
• a cap the investigator can’t go past without your approval

What a private investigator can’t legally do

A lower price is no bargain if the evidence can’t be used, or if it gets you into legal trouble. Licensed investigators work within the same laws as everyone else. In the US that generally means they can’t:

• tap phones, or record conversations they aren’t part of. In states that require everyone’s consent, they can’t record even when they are part of the conversation.
• pretend to be someone else to get phone records or bank records. Both are banned by federal law: the Telephone Records and Privacy Protection Act of 2006 and the Gramm-Leach-Bliley Act.
• trespass on private property, or hack into email, phones or social media accounts
• pose as police officers or make arrests beyond what any private citizen can do
• put a GPS tracker on a car you don’t own. Many states make this illegal.

An investigator who promises any of these is a red flag. The evidence could be thrown out, and you could share the legal risk.

How to hire a good investigator without overpaying

1. Check the license. Most states license private investigators. Look the name up on your state’s licensing board website, and ask for proof of insurance.
2. Be specific about what you want. “Find out if he is cheating” is open-ended. “Watch him on Thursday evenings for three weeks” can be budgeted.
3. Give them everything you already know. Photos, addresses, vehicles, schedules and phone numbers all save billable hours.
4. Get two or three quotes. Compare the whole package, not just the hourly rate: mileage, report fees, minimum hours, and whether they use one investigator or two.
5. Ask for a written estimate and a cap. A professional will tell you what they can realistically do within your budget.
6. Ask how evidence is delivered. Time-stamped video, photos and a written report matter if the case may go to court.
7. Talk to your lawyer first if there’s a divorce, custody case or lawsuit. Many lawyers hire investigators directly, which can help keep the work confidential.

When a private investigator isn’t worth the money

Some jobs don’t need a PI. You can do them yourself, or a lawyer or the police will handle them for free:

• Screening a tenant or employee. A licensed screening company is cheaper, and if you use it to decide on a job or tenancy, US federal law (the Fair Credit Reporting Act) requires you to follow its rules.
• Checking your own credit. In the US you can get your own credit reports free at AnnualCreditReport.com.
• Crimes in progress or someone in danger. Call the police first.
• Online scams. In the US, report them to the FBI’s Internet Crime Complaint Center (IC3) and your bank before paying anyone to “recover” money. Recovery services are a common follow-up scam.

Our take

For most people, a flat-fee background check or locate costs a few hundred dollars and is good value. Surveillance is where costs can run away, because it’s paid by the hour whether or not anything happens. Set a clear goal, give the investigator good information and agree a written cap. That keeps a case in the low thousands rather than letting it drift past $10,000.