Generally, mileage costs are built in to the cost of the investigation. If however, there will be a substantial amount of driving; there may be an additional mileage charge. The rate for mileage is the going rate used by the IRS for business mileage (currently 53.5 cents per mile for 2017). We cannot tell you what the total will be in advance, since we will not know where the subject will be going. We will keep you posted, but know, you may cancel the surveillance at any time. A very specific mileage report will be provided at the end of the investigation as well.