Payment processing isn’t an optional part of running a business. No matter what products or services you sell, you need a way to collect payments quickly and easily from your customers.
And in order to do that, you need the right tools. When it comes to credit card processing, the right payment terminal can make all the difference. This is especially true if you’re a small business or need to take transactions on the go. Having a solid portable card reader will enable you to take payments easily and keep customers happy.
In this article, we’ll discuss what to look for when shopping for a portable credit card reader for your business.
TL;DR
- Portable card machines (PCM) are primary tools for In-person transactions. While the integrated Stax Pay software can also handle virtual or keyed-in payments, the hardware is optimized for high-speed, secure, on-the-go card acceptance.Unlike a point-of-sale system (POS), which requires a countertop, stationary POS, a PCM’s primary purpose is to accept payments on the go, without being tied to a counter.
- Merchants can choose between standalone wireless terminals (which have their own cellular/WiFi connection, like the Dejavoo QD2) and mobile readers (which pair with your smartphone via Bluetooth, like the SwipeSimple B350). Countertop POS machines are less convenient, as they can’t be moved around as easily.
- The best portable card machine for your business will depend on your budget, payment options, and how much portability you want within and outside your storefront.
What is a portable card machine used for?
Portable card machines (PCM), more commonly known as mobile POS (mPOS) or mobile credit card terminals, allow retailers and small businesses to accept in-person and on-the-go payments.
Common payment methods include credit and debit cards, such as Visa and Mastercard (via either EMV chip or magnetic stripe). Some PCMs also take contactless NFC payment options, such as Apple Pay.
Like a traditional POS (point-of-sale) system, PCMs enable business owners to manage payment processing quickly and conveniently. However, portable card machines function better for businesses that require a countertop-free way of accepting payments.
Types of portable card machines for credit card processing
Not all portable card machines are designed to the same specifications and features. The most appropriate PCM for your business will depend on a variety of factors, including processing fees, what sorts of payments you want to accept (e.g. American Express), and the set-up of your storefront.
Wireless credit card machines
A wireless credit card terminal relies on Bluetooth or WiFi to process card payments. Because they are more streamlined and don’t require a wired connection, wireless terminals can be easily used by staff on the go within a storefront or outside at external events, unlike a countertop reader.
When you start your search for payment processing, look for transparent pricing models—like Stax’s subscription-based approach—that provide the software and wholesale processing rates without hiding costs in “rental” fees for equipment. While they use wireless signals, these devices utilize point-to-point encryption (P2PE) to ensure data is unreadable to hackers, making them just as secure as traditional wired terminals.
Mobile credit card readers
Similarly to wireless readers, mobile terminals are highly portable and can be carried around the shop floor by store associates, rather than forcing customers to queue at checkout. Mobile readers have evolved from simple plug-in dongles to sophisticated Bluetooth-paired devices and standalone smart terminals that run on Android OS. Usually, the provider will charge a one-off fee to purchase the reader, making them a cost-effective option for small businesses.
What to look for in a portable card reader
Choosing the right portable credit card reader comes down to how, where, and how often you accept payments. Below are the key factors to weigh, broken down into practical considerations that matter for day-to-day business operations.
Payment types and digital wallets supported
Your card reader should prioritize EMV chips and NFC (contactless). While magstripe support is still present in many readers, it is now considered a secondary fallback due to the security vulnerabilities of unencrypted track data. Most modern portable credit card readers also support contactless payments, which customers now expect for in-person sales. Look for compatibility with Apple Pay, Google Pay, and Samsung Pay, along with clear support for the contactless symbol so customers know they can tap to pay.
If you sell at pop-up shops, farmers markets, food trucks, or other on-the-go settings, digital wallets and mobile payments can significantly speed up checkout and keep lines moving.
Connectivity and reliability
How your device connects matters more than it sounds. Some wireless terminals rely on WiFi, while others use Bluetooth or a cellular signal. If your store has spotty WiFi or you sell outside a traditional retail environment, make sure the reader can maintain a stable internet connection or switch seamlessly between options.
Countertop terminals have moved beyond old phone lines, now favoring WiFi 6 or Ethernet, while portable readers leverage 5G LTE to ensure you never miss a sale at an off-site event. Mobile credit card readers paired with a phone or tablet offer more flexibility. Just confirm your setup works reliably during peak hours, not only in ideal conditions.
Security and data protection
Security should never be an afterthought. Look for card readers designed for secure transactions, with end-to-end encryption and tokenization built in. Your payment processor should clearly explain how customer data is handled and how card transactions are protected between the acquiring bank, issuing bank, and card issuer.
This matters whether you’re processing credit card payments in a store or sending payment links for remote transactions.
Hardware, software, and receipt options
Some businesses only need a simple mobile card reader, while others benefit from deeper integrations with POS systems. Consider whether you need receipt printing, inventory management, or a POS app that tracks sales across devices and locations.
Check compatibility with your specific smartphone model. Modern “Tap to Pay on iPhone” features typically require an iPhone 12 or newer to ensure full security and software compatibility with the latest Stax Pay app (now featuring Tap to Pay).
Fees, costs, and scalability
Finally, understand the full cost. This includes hardware pricing, monthly fees, and per-transaction credit card processing rates. Some providers bundle POS software and support, while others charge separately.
The best solution balances cost with flexibility, so you can accept payments confidently today and still support your business needs as you grow—whether that’s a retail store, a mobile setup, or both.
Final words
This blog has provided a neat round-up of the top PCM/mPOS options for emerging and established businesses. Before you commit to any of the above providers, make sure that you have a thorough understanding of what your business needs from your credit card terminal and how this may evolve/change over time. Selecting an easily scalable mPOS solution like Stax ensures that your business can continue meeting customer expectations for seamless service.
Stax provides the ultimate transparency with a subscription-based model, giving you access to direct-cost interchange—the same wholesale rates the big-box retailers pay—with 0% percentage markup.*
*Subscription prices are determined by processing volume and do not include cents per transaction.
Quick FAQs about portable credit card machine
Q: What is a portable credit card machine, and why is it important for businesses?
A portable credit card machine (PCM), also known as a mobile POS or mobile credit card terminal, is a device that allows businesses to accept in-person and on-the-go payments. It is crucial for businesses, as it provides a quick and efficient method for processing transactions, thus improving customer satisfaction and streamlining operations. With the increasing volume of card payments, having a reliable PCM can help businesses meet consumer expectations and manage transactions securely, in-store or on the go.
Q: What are the different types of portable credit card machines available?
There are mainly two types of portable credit card machines: wireless and mobile card readers. Merchants can choose between standalone wireless terminals (which have their own cellular/WiFi connection, like the Dejavoo QD2) and mobile readers (which pair with your smartphone via Bluetooth, like the SwipeSimple B350).
Q: How do wireless credit card machines benefit businesses?
Wireless credit card machines offer several advantages, including flexibility and mobility, allowing businesses to take payments anywhere within their premises or at external events. They facilitate faster checkout processes, reduce customer wait times, and can increase sales opportunities by bringing payment options directly to the customer.
Q: What should businesses consider when choosing a portable credit card machine?
When selecting a PCM, businesses should consider factors such as their budget, the types of payments they need to accept (e.g., chip, contactless, mobile), the level of portability required, and the transaction fees. Additionally, evaluating the security features and compatibility with existing systems is crucial for making an informed decision.
Q: What are the key differences between a portable card machine and a POS system?
A portable card machine primarily processes payments hands-free and on the go, while a point-of-sale (POS) system requires a stationary, countertop device. It often offers a broader range of business management tools, including inventory management, sales reporting, and customer relationship management, though some portable mPOS (such as the Dejavoo QD series) offer inventory management and other features. POS systems often include additional hardware like cash drawers and receipt printers, making them more comprehensive solutions for retail environments.
Q: How do mobile credit card readers enhance business operations?
Mobile credit card readers enhance business operations by providing a cost-effective, portable solution for accepting payments on the go. They enable businesses to offer a seamless checkout experience anywhere, thereby increasing customer satisfaction and reducing queues at checkout counters. These readers often integrate with mobile apps to provide additional functionalities like sales tracking and inventory management.
Q: Are there any security concerns with using wireless or mobile credit card machines?
While very rare, some worry about potential security risks associated with mPOS. With modern P2PE (point-to-point encryption) and tokenization, the data transmitted by your portable reader is rendered useless to hackers, ensuring that even in the unlikely event of an interception, your customer’s sensitive information remains secure. To mitigate these risks, businesses should ensure their devices are PCI DSS v4.0.1 compliant, use encryption technologies, and regularly update their software to protect against vulnerabilities.
