The EZ-Link card is a contactless smartcard based on Sony's FeliCa smartcard technology, used for payments in Singapore especially for transportation in Singapore . Established in 2001, it was promoted as a means for faster travel due to speedier boarding times on buses. EZ-Link cards are sold, distributed and managed by EZ-Link Private Limited, a subsidiary of Singapore's Land Transport Authority. As of 2005, there are over 8 million EZ-Link cards in circulation, with 4 million card-based transactions occurring daily.

Development
The card is commonly used in Singapore as a smartcard for paying transportation fees in the city-state's Mass Rapid Transit (MRT), Light Rapid Transit (LRT) and public bus services. The card also serves as a supplementary identification and concession card for students in nationally recognised educational institutes, full-time national service personnel serving in the Singapore Armed Forces, Singapore Civil Defence Force and Singapore Police Force or senior citizens who are over sixty years old.
The system has since been expanded, with EZ-Link cards being used for payments in Singapore branches of McDonald's, food centres, supermarkets and libraries, and even soft drink purchases from vending machines. Some schools in Singapore have also started to adopt the EZ-Link card as a way to mark the attendance of students and to pay for food served within the school campus.
The same system is used by the Octopus card in Hong Kong and will be used for public transit in The Netherlands.
On December 3, 2005, EZ-Link Pte Ltd announced that it was working with NETS to create a new hybrid card which will have the functions of both the EZ-Link card and the CashCard. This card would make it possible for one card to be used for payment on three popular modes of land transport in Singapore — ERP, bus and MRT. Work on this card is expected to be completed in 2007.

Technical data
Fares range from between S$0.65 to S$2.98 for standard adult EZ-Link cards on the Mass Rapid Transit. Concessionary users usually do not exceed fifty cents a trip on both MRT and bus systems. The fare for a bus trip for adult card users, including line changes usually never exceed S$1.90.
On the MRT system, there are forms of EZ-Link cards which are meant to be used as single-trip tickets, but the prices of which range are between one or two times the expense of non single-trip tickets, from S$0.90 to S$4.10. In addition, a S$1.00 refundable ticket deposit is charged for each Standard Ticket. This refund can be collected from any General Ticketing Machine when the card is returned to the machine within 30 days of purchase. The smartcard technology contained in each Standard Ticket makes each one costly enough to necessitate recycling of Standard Tickets.
There was a problem with commuters attempting to evade paying the full fare, with the prior magnetic farecard system.
Under the EZ-Link system, when a person taps his card on the entry card reader, the system deducts the maximum fare payable from his bus stop to the end of the bus route. If he taps his card on the exit reader when he disembarks, the system will return an amount based on the remaining bus stages to the end of the bus route. If he fails to tap the card on the exit reader when he disembarks, the entry card reader would have already deducted the maximum fare payable to the end of the bus route.
Initially, this system was not very well received by Singaporean commuters due to numerous glitches resulting in overcharging[1]. However, most of these glitches were rectified by the second year of operation: upgrading of the system software and changing the way fares are deducted. Nowadays, when a commuter taps his/her card on the entry card reader, the screen will display the remaining value in the card. The fare will only be deducted when the card is tapped on the exit reader. To ensure that commuters pay their fares, bus drivers are required to ensure that all commuters tap their EZ-Link cards on the entry reader (this gives off a discernible beep), and as with magnetic farecards, inspectors occasionally come on board buses to check the status of commuters' cards and ensure they have paid their fare. Non-EZ-Link card commuters use cash and receive a proof of purchase for the particular bus trip.

Criticisms

Network for Electronic Transfers
CashCard