Point of sale (POS): Understanding POS systems

A point of sale system is the specialized technology businesses use to calculate the amount a customer owes and provide options for payment. It consists of software that manages transaction details and the hardware used to accept payments, such as a terminal or tablet.

In a modern fintech environment, a POS system acts as more than just a checkout tool. It integrates with your backend systems, often through a POS API (Application Programming Interface), to track inventory, collect customer data for loyalty programs, and generate financial reports. This connectivity ensures that when a shopper buys an item in a store, your stock levels update automatically across your website and other physical locations.

While POS systems are commonly associated with retail stores, they are also widely used in hospitality industries. For example, restaurant point of sale software is designed to manage table orders, kitchen communication, and split bills, while hotel point of sale systems handle services such as room charges, dining, and guest transactions across multiple touchpoints.

A point of sale system works by connecting the business's storefront to a payment processor and its bank to authorize and complete a transaction. The process begins when a customer decides to buy a product and ends when the funds are scheduled for settlement.

POS transactions typically consist of the following steps:

1. The business scans the product barcode or selects the service on the POS software interface.

2. The POS system calculates the total price, including any applicable taxes or discounts.

3. The customer selects their preferred payment method, such as a credit card or a mobile wallet.

4. The POS hardware captures the payment details and sends them to the payment processor.

5. The payment processor tells the card networks and the issuing bank to authorize the transaction.

6. Once approved, the POS system records the sale, updates inventory, and generates a digital or paper receipt.

After the transaction is complete, the payment processor moves the funds from the customer's account to the business's bank account.

Modern POS systems require both physical hardware and digital software to work effectively in a retail or hospitality environment. These components must work together to ensure a fast and reliable checkout experience for the shopper.

Hardware components often include:

• Payment terminals that read card chips, NFC signals for mobile wallets, or magnetic stripes.

• Tablets where staff manage the sale and view product information.

• Receipt printers to provide customers with a physical record of their purchase.

• Cash drawers for secure storage of physical currency.

Software components include:

• Payment processing: The logic that securely handles sensitive transaction data.

• Inventory management: Features that track stock levels in real time.

• Customer relationship management (CRM): Tools that store shopper preferences and purchase history.

Choosing the right POS requires evaluating your specific industry needs, transaction volume, and plans for international growth. Businesses should look for a system that is flexible enough to scale as they expand into new markets or channels.

To choose the right POS, businesses should consider:

Software integration 

Ensure the POS connects directly with your existing accounting, inventory, and ERP software to keep data consistent across your operations.

Available payment methods 

Select a system that accepts a wide range of payment options, including local payment methods, mobile wallets, and international credit cards, so you can meet shopper preferences in every market.

Hardware and software reliability 

Choose a solution with high uptime and a stable connection to avoid losing sales during peak periods or technical outages.

Data security and compliance 

The system must meet global PCI standards and use encryption to protect sensitive customer information and reduce your risk of fraud.

Scalability and global reach 

If you plan to expand, choose a POS provider that offers local acquiring and support in multiple countries to simplify your international rollout.

Payment devices

The POS system you choose should be able to offer the payment devices you need for your business, such as:

• Tap to Pay: Tap to Pay lets shoppers make contactless purchases by tapping their card, phone, or compatible smartwatch instead of swiping their card or using cash. It’s an easier and faster way to pay, enhancing the overall shopping experience.  

• Mobile POS: A mobile point of sale (mPOS) is a wireless payment device that processes payments. It allows you to accept payments anywhere, as long as there is an internet connection. This means you can move around freely and meet your customers where they are the moment they’re ready to pay.

• Countertop: Compact and fixed-location terminals serve as the reliable anchor of a checkout desk. These devices provide the stability and speed needed for high-volume environments, often featuring built-in printers and customer-facing displays. They’re the perfect choice for traditional storefronts where a consistent, hardwired connection is essential for 24/7 reliability.

• Unattended: Customizable solutions for self-service businesses that allow customers to pay without staff assistance. These terminals are designed to be embedded into kiosks, vending machines, or parking meters, providing a secure and seamless checkout experience in any environment. They are built to withstand heavy use and outdoor conditions, making them ideal for automated retail.

Core features

Beyond the hardware, the software's functional capabilities determine how much time you'll save on manual tasks. Look for a POS software provider that offers these specialized features:

• Store and Forward (offline processing): Continue accepting payments even when your internet connection drops. Store and Forward securely "stores" the encrypted transaction data and "forwards" it for authorization once you are back online.

• Reconciliation: Choose a system that offers automated reconciliation, which matches your bank deposits to your sales records in real-time. This ensures your financial data is always accurate and reduces the hours spent on accounting.

• Giving (charity donations): Activate round-up or fixed-amount donation prompts directly on the payment terminal. This integrates social responsibility into the checkout flow, allowing customers to support good causes effortlessly.

Evaluating these factors will help you select a platform that supports your current daily operations while providing the flexibility to add new locations and sales channels in the future.

A unified POS system helps businesses bridge the gap between online and offline sales by using a single platform to process all transactions. This approach eliminates silos and offers a consistent experience for shoppers, regardless of how they choose to pay.

By using one platform for all points of sale, you can gain a clearer view of your entire business. You can see how specific products perform across different regions and identify shopping patterns that help you make better inventory decisions. A unified system also simplifies financial reconciliation, as all your payment data lives in one place.

Check out our unified commerce guide to dive deeper into the benefits.

With Adyen, you get access to a range of fully certified in-person payments solutions, with flexible options to fit any business model. Get up and running quickly with the latest terminals:

• Tap to Pay: Easy payments with any compatible device.

• Mobile: Flexible devices to accept payments anywhere, from retail environments to pop-up locations.

• Countertop: Compact and fixed-location terminals like the P400, perfect for traditional retail apparel settings.

• Unattended: Customizable solutions for self-service businesses.

Drive growth with Unified Commerce

Adyen's Unified Commerce payment solution helps omnichannel retailers offer connected shopping experiences and improve operational efficiency with a robust and dependable platform.

Instead of working with multiple providers, you get one platform that connects all your channels and operations. This allows you to get deeper insights into your customers so that you can provide them with flexible cross-channel experiences.

Get in touch to learn more about how our unified platform can help you manage your payments and data.

• A POS system is a solution that offers the software and hardware to manage in-person transactions and business data.

• Modern systems sync inventory and customer information across all sales channels in real time.

• The transaction process involves multiple parties, including the processor, card networks, and banks.

• Unified platforms simplify reporting and improve the shopper experience.