how much does a private investigator charge
1 On average, this hourly rate for a private inverstigator can range anywhere from $65 to $200 per hour. 2  There are prominent firms with a solid reputation that can charge up to $400 per hour. 3  Average investigations such as catching a cheating spouse can total more than $1,500 to as much as $5,000. There may be some circumstances where more than one investigator is needed. 2  If this is the case, you will be charged for each investigator. 3  A one-time retainer fee can be charged up front before everything begins. 4  This can cost anywhere from $300 to $1,000.