Choosing the Right POS System: Key Features Explained
When choosing a POS system, it’s easy to get overwhelmed by tech specs, pricing tiers, and marketing jargon. But behind the buzzwords are a few core features that truly make a difference — especially for small UK businesses.
This guide breaks down the key tools to look for, explains what they actually do, and helps you prioritise based on your business needs.
1. Sales Tracking & Reporting
A good POS system doesn’t just process payments — it tells you how your business is performing.
Why it matters:
Understand what sells and when
Identify slow periods and best-selling items
Make smarter stock and staffing decisions
Best for: All business types. Even basic reporting can help sole traders and side hustles make informed choices.
2. Inventory Management
This is essential if you sell multiple products — especially with variations (like size or colour).
Why it matters:
Tracks stock in real-time
Sends low-stock alerts
Prevents overselling or stockouts
Best for: Retail shops, salons, cafés, and mobile vendors with physical products.
3. Receipt Printing (or Digital Alternatives)
Receipts build trust and are often legally required. But how you deliver them depends on your setup.
Why it matters:
Printed receipts are expected in cafés and shops
Digital receipts reduce paper waste and enable email marketing
Some systems let you customise branding or offer QR-code receipts
Best for: Retail, hospitality, and businesses offering returns or expenses.
4. Payment Flexibility
Most modern POS systems accept major cards and contactless, but some go further.
Why it matters:
Accept chip & PIN, contactless, Apple Pay, Google Pay
Offer split payments or partial refunds
Send payment links or request remote payments
Best for: Any service where speed and flexibility matter — salons, trades, food trucks.
5. Customer Management Tools
A POS system can act like a lightweight CRM if it captures customer details.
Why it matters:
Track regulars, purchases, and preferences
Offer loyalty points, discounts or marketing emails
Build relationships that drive repeat business
Best for: Salons, cafés, and businesses with regulars or subscriptions.
6. Staff Accounts & Permissions
Running a team? You’ll want different access levels and tracking per person.
Why it matters:
Manage shifts, tips, and roles
Prevent unauthorised discounts or refunds
See who sold what
Best for: Any business with multiple staff members handling transactions.
7. Invoicing & Appointments
Some systems allow you to send invoices, manage bookings, or take deposits.
Why it matters:
Adds professionalism for mobile or service-based businesses
Allows prepayments and booking links
Keeps all revenue in one place
Best for: Mobile services, tradespeople, creatives, or coaches.
Final Tips
You don’t need every feature. Focus on tools that support your day-to-day workflow:
Keep it simple if you’re starting out — look at SumUp POS Lite or Square.
Go advanced if you need full stock control, table service or CRM — consider SumUp Pro or Square with add-ons.
Think future-proofing — a system that grows with your business will save you switching headaches later.
Still unsure? Our full reviews of Square POS, Zettle by PayPal, and SumUp break down the feature sets in real-world use.