Expedia believes in making travel easy and accessible, that's why we offer the flexibility to reserve your rental car without paying upfront. With our Book Now Pay Later option, you can just present a valid credit card to pay the cost in full at the pickup spot. How's that for easy? The car rental company will also place a hold on your credit card for the amount of the security deposit. For some cheaper online deals, you may have to pay at the time of booking. Be sure to take note of which payment options are available for the vehicle you're interested in.