Fare capping is a feature of public transport fare collection systems, which allows passengers to earn an unlimited-ride pass by paying single-ride fares. Typically, passengers pay a single-ride fare each time they use public transport, using a smart card or their own credit or debit card. An automated fare collection system tracks the payments, and awards the passenger an unlimited-ride pass after they have paid the equivalent value in single-ride fares.
Some trials and proposals of fare capping were conducted in the early 2000s, with the first large implementation in London in 2005. Limited numbers of large transport operators began introducing fare capping in the 2010s, using proprietary technologies. As of 2023, fare capping is being implemented by smaller transport operators, using widely-available technology, with back-end systems in the cloud.