Contactless payments (NFC): how tap to pay works

You reach the register, hold your card or phone near the reader, it beeps, and done: paid. No inserting the chip, no typing a PIN, no signature. What years ago seemed like something out of a movie is now the most ordinary thing in the world, and behind that simple gesture is a technology with an unfriendly name: NFC. It is worth understanding, because more and more customers expect to pay this way.

What NFC is

NFC stands for 'near field communication'. It is a technology that lets two devices communicate when they are very close, a couple of centimeters apart. It is the same idea as the cards you tap to enter the subway or the office, applied to payments.

An NFC payment is simply a contactless transaction made by holding an NFC-enabled device, a card, a phone, or a watch, near a compatible reader. There is no need to touch anything or insert the card; you just bring it close.

How tap to pay works, step by step

When you bring your card or phone near the reader, a small conversation happens in less than a second. The reader emits a very short-range radio field that wakes up the NFC chip in your card or phone. Then the two exchange the information needed to authorize the charge, encrypted, and the reader sends it to the bank for approval. All of that happens in the time the beep lasts.

The key is that the range is tiny, just about four centimeters. That is why you have to hold the card so close: it is not a design oversight, it is a security measure so nobody can charge you from a distance without you noticing.

Contactless payments now account for more than 75% of all transactions on Mastercard's global network, and the number of tap-to-pay transactions has grown fivefold since 2020.

Why it is secure

Many people distrust it precisely because it is so easy, but contactless payment tends to be more secure than swiping a card the old way. There are several reasons:

• The range is just a few centimeters, so the reader has to be practically touching your card.
• The communication is encrypted between the device and the reader, it does not travel as plain text.
• It uses tokenization: instead of sending your real card number, it sends a one-time code, so even if someone intercepted it, it would be useless.
• It complies with the security standards Visa and Mastercard use for contactless payments.

Why it became so common

The shift was very fast. Today NFC support is almost universal: more than 94% of smartphones come ready to pay contactless. Digital wallets like Apple Pay and Google Pay, which use this same technology, already add up to billions of users worldwide.

And people like it: a 2025 global survey showed that 71% of consumers prefer contactless payments over traditional methods, a figure that keeps rising year after year. The reason is simple: it is fast, convenient, and hygienic. Paying with a tap is quicker than inserting the chip.

What it means for your business

For a small business, accepting contactless payments has stopped being a luxury. Today many phones can act as the reader, without buying an expensive terminal: the customer brings their card or phone near yours and that is it. This speeds up the line, reduces cash handling, and gives the customer the payment method they now expect by default.

Contactless payment closes the sale; but before charging, you have to find and serve the customer. While NFC technology handles the last step at the register, an assistant like Lidia can handle the first ones: answering questions and booking the appointment over WhatsApp so that person makes it all the way to your counter.

The takeaway

Tap to pay works thanks to NFC, a very short-range technology that lets your card or phone and the reader communicate in an encrypted, secure way in less than a second. It is fast, it is secure by design, and it is already what most of your customers prefer. If your business does not accept it yet, it is worth taking the step: it is one of the simplest investments with an immediate effect on the buying experience.

Sources

• Mastercard — https://www.mastercard.com/us/en/news-and-trends/stories/2025/contactless-payments-2025.html
• Worldpay — https://www.worldpay.com/en/insights/articles/nfc-payments-for-your-business
• Visa — https://usa.visa.com/about-visa/newsroom/press-releases.releaseId.21271.html
• Juniper Research — https://www.juniperresearch.com/press/contact-payment-value-to-double-by-2030/