How an NFC payment works
The terminal generates a radio field. A contactless card has no battery: the field powers its chip, and the two exchange messages under the EMV contactless specifications. A phone or a watch does the same in card emulation mode, presenting a tokenised copy of the card from its wallet.
The chip or the wallet produces a cryptogram for that one payment, and the terminal sends it with the payment details to the acquirer and the issuer. EMVCo describes this as a one-time security code generated for every transaction.
The parts of an NFC payment
- The device: a contactless card, or a wallet such as Apple Pay or Google Pay
- The reader: a card terminal, or a phone running SoftPOS
- The kernel: the terminal software for each card scheme's contactless specification
- The token: a wallet sends a device-specific number, not the card number
- The verification: none for small amounts, or a PIN, a fingerprint or a face check
Why NFC matters to a payments product
For an issuer, NFC means provisioning cards into wallets through the schemes' token services. For an acquirer or a SoftPOS provider, it means approved contactless kernels and, in the EU and the UK, the rules on contactless payments made without strong customer authentication.
NFC payment, contactless payment or QR code?
- Contactless payment
- The payment as the buyer sees it: a tap. NFC is the radio technology underneath.
- QR code payment
- Uses the phone's camera and an internet connection, with no radio link between the two devices.
Where an NFC payment shows up in a platform
Modules that do the work
- Card acquiringCard acceptance on the phone, in store and online, through the acquirer you choose.
- Card issuingVirtual and physical cards, wallets and controls, on the issuer processor you choose.
- AuthenticationSign-in, passkeys and second factors for customers and staff, on your identity provider or ours.
Platforms that need it
Guides that go deeper
Where it is written
The laws and standards this page's facts come from.
General information, not legal advice: what applies to you depends on your services and your market.