When many people are booking in an area and few captains are free, a surge multiplier applies to fares there. It's what makes it worth a captain's while to head into the busiest areas, so that rides keep being available when demand is highest.

Surge is always shown before you confirm — you'll never find out about it afterwards. If you can wait, fares usually settle within a short time.

Surge is capped, and the cap follows the limits set by the state you're travelling in.