Mileage help

ajcbgray

I have some mileage that is charged to clients as a line-item on their invoice and I have some mileage that isn't (I'm a one-person company and drive a personal car, BTW). I log all mileage to a spreadsheet, then at the end of the month turn in all the mileage I've driven and take a personal reimbursement for those miles. It occurred to me that I need record these transactions differently since the charged mileage is just passing through to me and shouldn't show as a business expense. Can anyone help me with how to do that?