Londoners have paid for more than 700,000 bus fares using their contactless bank cards since the option was introduced three months ago.
Having missed its initial Olympics target, Transport for London finally brought in the bank card option on its 9000 buses in mid-December, providing Londoners with an alternative to the Oyster system.
According to Barclaycard, since then an average of 11,000 contactless bus fare transactions have taken place every day, and the volumes are growing exponentially month-on-month.
This still represents a tiny 0.18% of the six million passengers that TfL says use the network each weekday. However, Barclaycard predicts that usage will continue to rise sharply, estimating 25 million contactless journeys will be made across the capital by the end of 2013.
Meanwhile, the technology will receive another boost as contactless comes to the London Underground and Overground, DLR, and trams before the year ends.
With 31 million contactless cards now in circulation in the UK and 130,000 places where they can be used, the number and value of transactions has been soaring - up from 710,000 worth £4.1 million in December 2011 to 3.8 million worth £26.7 million in December 2012.
Nicholas Clements, MD, UK consumer cards, Barclaycard, says: "In the past year we've seen a dramatic uplift in the adoption of contactless technology as both consumers and retailers recognise it is an easy and convenient way to pay."