What is a POS system?
A Point of Sale system records and completes a transaction between a business and a customer.
At its simplest:
Product selected → price calculated → payment accepted → sale recorded → receipt issuedA modern POS can also connect the transaction to inventory, taxes, discounts, customer profiles, loyalty, accounting, and reporting.
For a retail store, the POS may be the checkout counter. In a restaurant, it may be a tablet used to take orders and collect payments. For a mobile seller, the POS may be a smartphone connected to payment software.
How does a POS transaction work?
1. The sale is created
The cashier scans an item, enters it manually, or selects it from the POS catalogue.
2. The POS calculates the total
The system applies prices, discounts, and applicable taxes.
3. The customer chooses how to pay
Depending on the setup, this could be cash, card, contactless payment, UPI, wallet, gift card, or another supported method.
4. The payment is authorised
For an electronic payment, transaction data moves through the payment provider and relevant bank or payment network for approval.
5. The sale is completed
The POS records the transaction, updates relevant inventory, and produces a physical or digital receipt.
Payment authorisation and POS recording are related but separate events. The POS records the sale, while the payment infrastructure handles approval and settlement.
What are the main components of a POS system?
| Component | What it does |
|---|
| POS software | Creates sales, applies prices/taxes, records transactions |
| Payment terminal/card reader | Captures card or contactless payment data |
| Barcode scanner | Identifies products quickly |
| Receipt printer | Produces physical receipts |
| Cash drawer | Stores and records cash transactions |
| Display/tablet | Runs the checkout interface |
| Inventory module | Updates stock as products are sold |
| Reporting tools | Tracks sales, refunds, staff, and product performance |
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What are the different types of POS systems?
Traditional or on-premise POS
Software and data are primarily managed on local business hardware.
Cloud POS
Sales data synchronises through cloud infrastructure, enabling remote access and multi-location management.
Mobile POS
A smartphone or tablet acts as the checkout interface, often paired with a compact reader.
Self-service or kiosk POS
Customers place orders or scan items themselves before paying.
SoftPOS
SoftPOS enables compatible smartphones or tablets to accept contactless card or wallet payments using NFC without a separate traditional card terminal.
POS system vs payment terminal
A
payment terminal is the device used to capture card or contactless payment data.
A
POS system is broader.
| POS system | Payment terminal |
|---|
| Records the sale | Captures the payment |
| Can manage products and stock | Connects to payment-processing infrastructure |
| Can manage discounts, tax, staff, and reporting | Handles card/contactless interaction |
| May support cash and other methods too | Primarily a payment-acceptance device |
What are the benefits of a POS system?
A POS system can improve
checkout speed, inventory visibility, reconciliation, multi-location reporting, and customer/loyalty management. The benefit depends on the product and integrations you choose.
What challenges should businesses consider?
Integration: The POS needs to work with payment providers, accounting tools, inventory systems, and other business software.
Downtime: A cloud or connected POS should have a clear plan for internet or provider outages.
Security: Payment terminals and POS environments that store, process, or transmit cardholder data can fall within PCI DSS scope.
Cost: Consider hardware, software subscriptions, payment-processing fees, support, and upgrades rather than only the device price.
Scalability: A system that works for one shop may not suit ten locations or a complex inventory catalogue.
How secure are POS card payments?
PCI DSS applies to entities and systems that store, process, or transmit cardholder data, including relevant POS/payment-terminal environments.
For chip and contactless transactions,
EMV technology uses transaction-specific cryptographic data to make counterfeit fraud harder. Businesses should also keep POS software patched, restrict access, and follow applicable PCI DSS requirements.
How do you choose a POS system?
Evaluate:
- Business type: Retail, restaurant, services, events, or multi-location?
- Payment methods: Cards, contactless, UPI, cash, wallets, or gift cards?
- Hardware needs: Fixed terminal, mobile device, kiosk, scanner, printer?
- Integrations: Accounting, CRM, ERP, e-commerce, and inventory?
- Reporting: Can you reconcile sales, refunds, and payments clearly?
- Security: What PCI DSS responsibilities apply?
- Offline resilience: What happens if connectivity fails?
- Total cost: Hardware, software, processing, support, and upgrades?
Where does PayGlocal fit?
A POS system primarily manages the
in-store sale. Businesses selling internationally online need a separate cross-border payment layer.
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