How Much Does a Private Investigator Cost?

A 2026 industry survey of 32 firms in the 10 largest metro areas reported an average of about $132 an hour, with rates from $25 to $250. Other consumer cost guides quote lower averages, so treat any figure as an estimate and get a written quote.

XGuard publishes no private investigator rate of its own, so that survey figure is not an XGuard price. Each investigator on XGuard sets their own rate, and it is shown before you book.

A retainer is an upfront deposit that the investigator draws down as they bill hours and expenses. The amount is set by the investigator and varies with the size of the case, and some investigators set a minimum. Ask how much is required, whether unused funds are refunded and what happens if the work exceeds the retainer. Get this in writing.

Several factors move the bill.

• Type of work: records research is cheaper than surveillance, which ties up hours and sometimes more than one investigator.
• Number of investigators: a surveillance team multiplies the hourly cost.
• Location and travel: mileage and time spent traveling are often billed.
• Time of day: evenings, weekends and short notice may carry a premium.
• Minimum hours: some investigators set a minimum number of billable hours per job.
• Expenses: record fees, equipment and court filings are usually charged on top.

For narrow, well-defined tasks such as a records search, locating a person or serving a simple request, some investigators quote one fixed price instead of an hourly rate. Open-ended work like surveillance or a complex fact-finding job is nearly always billed by the hour because no one can know in advance how long it will take.

Be specific about what you want to learn. Share everything you already know so the investigator does not spend paid hours rediscovering it. Ask for an estimate of total hours, set a spending cap, and request regular updates so you can stop if the answer is already clear. Confirm the investigator holds the license your state requires and ask how they will report findings. Rules on what investigators may do differ by state.

On XGuard, payment is held until the work is complete. See the pricing page for how the platform fee is shown.

Before any work starts, ask for a written agreement. It should name the investigator and their license number, describe the work in plain terms, state the hourly rate or the fixed price, set the retainer and say how it is drawn down and refunded.

It should also say how expenses are billed, how often you will receive updates and invoices, what the investigator will do if costs approach your cap, and how findings will be delivered. Ask what the investigator will not do, since lawful limits on surveillance, recording and obtaining records differ by state and a good professional will tell you plainly.

Keep your own notes of what you asked for and when. If a bill seems higher than the estimate, a written agreement and regular updates make it easy to discuss. Anyone who is reluctant to put terms on paper is a reason to look elsewhere.

The honest answer is that nobody can give an exact price without knowing the task. A short records search and a multi-day surveillance job with several investigators are very different amounts of paid time, which is why a clear estimate and a spending cap matter so much.