Merseyrail is the first UK rail operator to introduce contactless payments for travellers.
Merseyrail customers can make payments of £20 or under using contactless technology introduced in partnership with MasterCard and Global Payments.
With 98 percent of the operator's current customer transactions under £20, all customers need to do is touch their contactless credit, debit or prepaid card or device over a reader to pay for their travel.
When a beep sounds or a green light flashes, payment is complete.
The service is faster, lessening queuing times, more secure and offers the customer more choice and flexibility, said Merseyrail.
Most Merseyrail stations will be equipped with the contactless technology.
Maarten Spaargaren, Merseyrail’s managing director, said,:“This development is a very positive one for our customers and means that they can now make payments quicker and easier than ever before, in full knowledge that they are doing so safely and securely.
"We’re keen to keep pace with an increasingly technological world and delighted to be trailblazing this digital advancement.”
The first phase of the contactless system will launch with MasterCard and VISA. American Express will follow next year.
Marion King, president for UK and Ireland at MasterCard, said: “MasterCard works extensively with the transit sector and as an example we have worked with TfL this year to implement contactless technology to millions of bus commuters in London."