The British bank is launching the trial to 200 customers in mid-April, and it will allow participants to make payments without having to put in their pin number or offer a signature.
As reported by The Verge, people using the new system won't be subject to the usual £30 limit for contactless payments due to the increased security.
With the data for the fingerprint stored locally on the card itself, it means there isn't any security information held in a bank's central database.
While it isn't totally risk-free - a determine criminal could steal and imitate someone's fingerprint - it does mean a hacker won't be able to steal the information remotely.
It also falls short of making things totally convenient, as Natwest's trial requires participants to visit a branch of the bank to register their fingerprint.
There is a question about why customers would need biometric cards, including the need to carry a separate card, especially with modern smartphones featuring mobile payment functions which are protected behind the device's fingerprint readers and face scanners.
However, despite these drawbacks it does open the door for people who perhaps can't afford a smartphone to be able to make payments with a similar level of security.