Card machines explained

A card machine is a physical device that lets your business accept electronic payments in person. Your customer presents a debit card, credit card or supported digital wallet, and the machine communicates with your payment provider to authorise the payment.

The terms card machine, payment terminal, card reader and card device are used across the industry for similar equipment. In South Africa, "card machine" is the term most small and growing businesses use.

A card machine can work on its own or as part of a larger point of sale setup. Either way, its job is taking payments. Recording what was sold, tracking stock and reporting is typically done by a point of sale system.

Card machines come in five formats: countertop, portable, mobile, a card machine that also runs point of sale software, and a phone app that takes contactless payments. The right type depends on where you take payments and how much you need the device to do beyond accepting a card.

In South Africa, many businesses start with a standalone mobile card machine and later move to a device that combines payment acceptance with point of sale software. Starting that way lets you take cards quickly and add sales management when you need it.

A card machine sends the payment to your provider, which routes it through the card network to the bank that issued the card, and the answer comes back in a few seconds. Four parties are involved, which, in South Africa, is called the four-party model.

A typical card payment follows this path:

1. The payment amount is entered on the card machine, either by hand or sent from a connected point of sale system.

2. The customer taps, inserts or swipes their card, or taps a supported digital wallet.

3. The card machine sends the payment details to your payment provider.

4. Your provider routes the request through the relevant card network, such as Visa or Mastercard, to the issuer, which is the customer's bank.

5. The issuer checks whether the card is valid, the account has funds and the payment passes security checks.

6. The issuer sends an approval or a decline back through the network to the card machine.

7. The card machine shows the result. If it's approved, you can complete the sale.

This entire process takes a few seconds. The card network acts as the routing layer between the acquirer and the issuer but is not itself a bank.

The Payments Association of South Africa explains these roles in more detail.

No. Approval means the issuer has confirmed the payment can go ahead, but the money hasn't reached your bank account yet.

After approval, the payment goes into a clearing and settlement process. Your payment provider batches approved transactions and settles the funds to you on its payout schedule. Payout timing varies by provider. Some pay out the next business day and others take longer.

That difference matters when you reconcile. The amount shown on the card machine won't always match a single bank deposit, because one payout can cover more than one transaction and fees or adjustments may be taken off it.

Card machines accept contactless taps, chip and PIN, magnetic stripe swipes and digital wallets, and which of those you get depends on the device, your payment provider and the card networks it supports.

Chip and contactless payments offer stronger security than the magnetic stripe (swipe), so the stripe is the method you're least likely going to need. Confirm which methods your provider and your device support before you buy.

No. A card machine and a point of sale system do different jobs. They can work together, and they can both run on the same device, but they are not interchangeable.

A card machine is enough when you know what to charge and you just need to take the payment. A point of sale system is worth adding when you also want to track what was sold, manage stock, control staff access or pull end-of-day reports.

Yes. Some devices run point of sale software and accept card payments on the same hardware, so your staff build the order and take the payment on one screen. The device takes a card tap and also lets staff select products, apply discounts, record cash payments and view reports.

The card machine and point of sale remain distinct functions even when they share a screen. The point of sale records the sale. The payment function processes the electronic payment. If the payment is declined, the sale stays open on your point of sale, until you use another payment method or cancel the transaction.

Card machine hardware costs and ongoing fees in South Africa are charged as an upfront cost plus a percentage of every card sale, paid by your business and typically taken off your payout rather than invoiced separately. The rate depends on your provider and your plan, and some providers drop the rate at higher volumes. Ask whether a quoted rate includes or excludes VAT.

The cost of a card machine has three layers, and comparing only the device price won't tell you what it costs to run.

Transaction fees are your largest ongoing cost. A cheap device with a high percentage rate can cost more over time than an expensive device with a lower rate. Compare devices on total cost at your realistic monthly card volume, not on upfront price alone.

Check six things once you know the rate: how the device connects, whether you're locked into that provider's hardware or contract, when payouts land, which cards and wallets it takes, what support you get and how receipts are issued.

A card machine can work alongside a point of sale system in two ways.

1. Standalone (not connected). The business enters the payment amount on the card machine separately. After the payment is approved, a staff member records the result in the POS manually. The two systems do not exchange information automatically.

2. Connected or integrated. The point of sale sends the payment amount to the card machine. The card machine processes the payment and returns the result to the point of sale. This reduces repeated entry and helps the sales record match the payment record.

Whichever way they're linked, the two stay distinct.

The point of sale system records what was sold and the card machine processes how your customer paid. So a payment problem is a question for your card machine or your provider, and a missing sale or a wrong product points back to your system.