How to Tip an Uber Driver. When using an Uber taxi ride, all required fees associated with your ride will be directly charged to your credit card. Your Uber fare includes a 20% tip only when you take UberTAXI, a partnership between Uber and existing taxi services. If you're riding in an UberTAXI, you can log into your Uber account online to edit and alter the percentage of tip charged to your account per ride.