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The PAX S90 is a portable (wireless) credit card machine. If you need to be able to move around your store or restaurant with your machine, wireless terminals are the way to go. A rechargeable battery and plenty of memory lets you use the PAX S90 for multiple transactions without hassle and the rugged terminal is durable for long life. The PAX S90 has several optional features, including a barcode scanner, or the choice of a built-in contactless reader so you can take payments from new technologies like Visa payWave and MasterCard PayPass. Let's take a look at the features in further detail. 


The PAX S90 includes several features for convenience, including multiple connection options, a bright backlit screen, function keys, internal memory, a thermal receipt printer, and optional accessories.

The PAX S90 includes both USB and 3G connection options. A serial port is also built in.

The white backlit LCD screen is bright and readable in many lighting conditions. The S90 has a 128 x 64 pixel display.

For convenience, the PAX S90 terminal includes 8 function keys and 4 ATM keys in addition to the traditional 10 alphanumeric keys.

The portable PAX S90 is 199mm L x 87mm W x 61.5mm H and weighs 504g.

192MB of total memory (divided as 128MB of Flash and 64MB of DDR) means plenty of storage for transaction information.

A built-in thermal graphics printer makes receipt printing fast and doesn't require fussing with an external option. The S90 printer uses a standard 2.25” paper roll and prints at 18 lines per second.

Optional accessories are available, including a leather case, a charging dock, and a car charger.


Just because the PAX machine isn't a full point of sale system doesn't mean it scrimps on security. The PAX S90 is PCI PTS 3.x approved and uses PIN ciphered key algorithms. The terminal is also EMV certified, and MasterCard PayPass and Visa payWave certified.

Costs for Credit Card Processing

As with all credit card machines, the costs to take credit cards will be set by the processing company, not the equipment company. PAX terminals are not limited to specific processors, which means you can get competitive pricing and still use PAX machines. If you need to know exactly what you'd pay, you can get quotes anonymously with our free quote request tool

Costs for the machine itself will vary depending on where you purchase it. The PAX S90 starts around $300 at retail, though your exact costs could be more or less.

Helpful Links 

Manufacturer’s page

Product Features
Status Universal
Product Category Credit Card Machines
Features Dial-Up, Dual/Comm, Wireless, Wifi, Contactless, EMV/ Smartcard, Built in Contactless Reader, NFC Capable, Internal PIN Pad


How can you use the USB port on the terminal? I'm worried about not getting a cell signal where we will be selling.
TSYS Merchant Solutions Logo
Votes:0 +
from TSYS Merchant Solutions

Please contact your merchant provider.



Submit your review for PAX S90

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Review posted: 06/07/17 new
Name: Josh hoffman
Title: Great terminal


Reliable, 2 year warranty, fast startup, and it just simply works. This terminal is our 1st recommended solution.

Review posted: 04/26/16 new
Name: CardFellow
Title: good basic machine


The PAX S90 is durable, which is great for heavy-use environments. A good basic credit card machine for businesses that don’t need a full point of sale system.