Drivers parking in the Mayorhold multi-storey car park in the town centre can now use chip and pin credit and debit cards to pay.
The pay machines at Mayorhold now take the cards, as well as coins and notes.
Card payments are checked in the same way as any other card payments and will be accepted only after authorisation by the bank.
Northampton Borough Council hopes the move will make parking easier and more flexible for shoppers and visitors to the town centre.
It is part of a wider programme of improvements which has already seen upgrades made to the Grosvenor Centre car park machines, which now also accept cards.
For full details of Northampton Borough Council car parks visit www.northampton.gov.uk/parking