How do you bill a client for mileage?

To bill a client for mileage, first, calculate the total distance traveled for the business purpose using a reliable mapping tool. Multiply the total miles by the current IRS mileage rate or your agreed-upon rate. Prepare an invoice detailing the mileage, purpose of the trip, and total amount due, ensuring that any necessary documentation or logs are included for transparency. Make sure to communicate the billing process and rate with the client beforehand to avoid any misunderstandings.