A retail point-of-sale (POS) system (“kassasysteem winkel” in Dutch) is the combination of hardware and software that processes sales transactions in a physical store and keeps your inventory, payments, and reporting synchronised. The choice of system directly impacts which payment methods you can accept, how well your physical store connects to your online shop, and how much useful data you get out of every transaction.

Below, we’ll explore how retail POS systems work, how different system types compare, and what to consider when you connect in-store and online sales.

Highlights

• A sophisticated retail POS system tracks inventory, generates sales data, and connects your physical and online stores in real time.

• Dutch retailers need a system that supports iDEAL | Wero, card payments, and digital wallets.

• Some modern tools let retailers that already use online payment processing extend that same integration to in-person payments so all transaction data stays in one place.

What is a retail POS system?

A retail POS system is the solution a business uses to process in-person sales. It has two layers: the hardware you interact with and the software that runs behind it.

The hardware typically includes a tablet or touch screen terminal, a barcode scanner, a receipt printer, and a card reader. Some setups add a customer-facing display or a cash drawer. The specific combination depends on the store.

The software layer records each transaction, updates inventory counts, applies discounts or loyalty points, and generates the sales data you’ll use at the end of the day, week, or quarter. Modern POS software runs in the cloud, which means your data isn’t locked to a single device and you can access reports from anywhere.

How does a retail POS system work?

The transaction flow is straightforward, but there’s a lot happening at each step. Here’s what the system is doing from the moment a customer brings items to the counter:

• Pricing: When the cashier scans each barcode, the POS software retrieves the price from your product catalogue and adds each item to the transaction in real time.

• Payment processing: Once the customer’s ready to pay, the system sends the total to the payment terminal. The customer pays and the POS records the payment method and closes the transaction.

• Inventory update: The moment a sale completes, the inventory database adjusts. If you’ve sold the last unit of a product, the system flags it. If you’ve set reorder thresholds, it can alert a manager or generate a purchase order automatically.

• Reporting: Each transaction feeds into your dashboard. You can see which products are selling, what your busiest hours are, and how revenue comes in by payment method or staff member.

What are the main features of a retail POS system?

Retailers tend to focus on a list of features when they evaluate systems. Here’s what usually matters:

• Inventory management: The system needs to track stock levels in real time, handle bulk imports of hundreds of stock-keeping units (SKUs) at once, and support product variants such as size, colour, and material. If it can’t keep your catalogue accurate, everything else fails.

• Payment flexibility: Dutch customers pay with a range of methods, including credit and debit cards, iDEAL | Wero, and digital wallets. A POS system that supports only one of these can create friction at checkout and cost you sales.

• Reporting and analytics: You want transaction-level data you can query. The more granular the data is, the more useful it becomes for buying decisions and staffing.

• User management: This lets you set permissions by role. A cashier doesn’t need access to margin data; a store manager probably does. User management also keeps the interface clean for staff who need only a subset of features.

• Hardware compatibility: Check whether the system works with receipt printers, scanners, and terminals from multiple manufacturers. Proprietary hardware could be expensive when a part breaks or needs replacing.

What types of retail POS systems are there?

There are a few distinct categories of retail POS systems. The right one for your business depends on your size, setup, and how much you want to manage yourself:

• Cloud-based systems: Data is stored on remote servers, and the software runs through a browser or dedicated app. Updates happen automatically, the system is accessible from multiple locations, and integrations with other software are generally easier to maintain.

• On-premise systems: These run on local hardware, store data on-site, and work without an internet connection. This matters in locations with unreliable connectivity, but on-premise POS systems often require manual updates and come with higher up-front costs and more information technology (IT) overhead.

• Mobile systems: Mobile systems run on tablets or smartphones and are well-suited to smaller stores, pop-up retail, and markets. Retailers can use tablet-based setups to let staff process sales on the shop floor rather than route every customer to a fixed counter.

• Integrated platforms: These combine a POS with inventory, ecommerce, and sometimes accounting in a single system. An integrated platform is worth considering if you’re running both a physical store and an online shop and want a single source of truth for stock and sales data.

How does a retail POS system connect in-store and online sales?

If your in-store POS and online store run as separate systems, inventory can get out of sync fast. You sell a product online, the POS still shows it in stock, and a customer comes in to buy it only to find it’s not available. The solution is a single inventory layer that both channels write to simultaneously.

Some retailers solve this issue with a dedicated omnichannel platform. Others use a POS system that offers a native ecommerce module. Either approach works as long as the data model treats your physical and online stores as two sales channels that draw from one pool of stock.

Click and collect is a specific case worth considering. If a customer orders a product online and picks it up in-store, the POS system needs to recognise that order and mark it as fulfilled. That requires tight integration between your online checkout and your in-store system. It’s important to test this flow explicitly before you choose a platform.

Stripe’s infrastructure supports this kind of connected setup. Stripe Terminal handles in-person payments and syncs them with Stripe’s online payment tools so in-store and online transactions appear in the same system.

What are the limitations of a retail POS system?

Every system has constraints. Knowing them up-front means fewer surprises later:

• Internet dependency: Cloud-based systems vary in how they handle a dropped connection. Some go fully offline. Others queue transactions locally and sync when connectivity returns. Ask specifically how a system handles this issue before you commit.

• Integration gaps: These appear when your POS doesn’t connect cleanly to your accounting software, loyalty platform, or ecommerce back end. A connection that worked last year might break after a software update on either side, and not every integration is maintained at the same quality.

• Hardware costs: Even if the software subscription is visible in the pricing, the cost of terminals, scanners, and printers might not be. If a vendor requires proprietary hardware, factor that into the total cost of ownership from the start.

• Scalability limits: A system that works well for one location might not be able to handle five without a major upgrade or migration. Ask how the system works at the next stage of your business and whether it holds up as you grow.

• Staff training: A well-designed interface helps, but any new system has a learning curve. Allocate time for training your employees.

What should you look for when choosing a retail POS system?

Start with your transaction volume and product catalogue size. From there, consider the following:

• Transaction volume and catalogue size: Ensure the system you’re evaluating is built for your business’s size. A boutique-focused platform likely cannot handle a retailer with thousands of SKUs across multiple categories, and an enterprise system brings unnecessary complexity if you’re running only one location.

• Payment method coverage: Any POS system you evaluate should support iDEAL | Wero, card payments, and digital wallets at minimum. In the Netherlands, these are what customers typically expect.

• Application programming interface (API) quality: Even if you’re not a developer, the API determines how well your POS connects to your accounting software, ecommerce platform, and loyalty programme. A well-documented, actively maintained API is a sign the vendor takes integrations seriously.

• Reporting depth: Run a demo using your own scenarios. Check whether you can filter sales by product category for a specific two-week window and whether you can export to comma-separated values (CSV) or connect to a business intelligence tool. Reporting quality varies between systems and it’s one of the hardest things to retrofit later.

• Centralised payments: The system should handle in-person payments and connect directly to your online payments infrastructure so retailers that already process payments online can extend that to physical locations without a separate integration.

How Stripe Terminal can help

Stripe Terminal allows businesses to grow revenue with unified payments across in-person and online channels. It supports new ways to pay, simple hardware logistics, global coverage, and hundreds of POS and commerce integrations to design your ideal payment stack.

Stripe powers unified commerce for brands like Hertz, URBN, Lands' End, Shopify, Lightspeed and Mindbody.

Stripe Terminal can help you:

• Unify commerce: Manage online and in-person payments on a global platform with unified payment data.

• Expand globally: Scale to 24 countries with a single set of integrations and popular payment methods.

• Integrate your way: Develop your own custom POS app or connect with your existing tech stack using third-party POS and commerce integrations.

• Simplify hardware logistics: Easily order, manage and monitor Stripe-supported readers, wherever they are.

Learn more about Stripe Terminal or get started today.