Best payment system for small retailers
Unlike a mobile trade or callout business, a small shop has a fixed till point and usually a range of products to track — which changes the calculus from "cheapest reader" to "what fits my stock and reporting needs." A simple range can still get by on a standalone reader; a larger one benefits from an integrated point-of-sale system.
Best choice: Square
Square's POS ecosystem covers stock tracking, barcode scanning, staff logins and sales reporting alongside payment processing (1.75%), making it the strongest fit for a shop with a meaningful product range rather than a handful of items.
Best alternative: Zettle or Lopay
If your range is small and you don't need inventory features, Zettle (1.75%, PayPal integration) or Lopay (0.79-0.99%, the cheapest rate) are simpler and cheaper than committing to a full POS platform you won't fully use.
What a small retailer's card takings usually look like
Independent shops typically see steadier, more predictable daily footfall than mobile trades, with basket values commonly in the £10-£40 range depending on category. Unlike a callout trade, transaction volume is usually the main driver of monthly card fees rather than a handful of large invoices — which is why the percentage rate matters more here than any fixed per-transaction fee.
| Provider | Best for | Card fee | Contract |
|---|---|---|---|
SqSquare | Stock tracking, full POS ecosystem | 1.75% | None |
ZeZettle | PayPal integration, simple range | 1.75% | None |
LoLopay | Lowest fees, no inventory needs | 0.79-0.99% | None |
Beyond the headline rate
Stock and inventory tracking
A shop with dozens of SKUs benefits from knowing what's selling and what needs reordering — a core Square POS feature that a bare card reader doesn't offer at all.
Barcode scanning at the till
Faster checkout for a busy counter matters as much as the fee itself once you're processing more than a handful of items per basket.
Staff accounts and permissions
If you employ counter staff, separate logins with limited permissions (voids, refunds, discounts) reduce the risk of till errors or fraud compared to a single shared card reader.
Online/in-store combined sales
If you also sell online, check whether your provider's ecommerce and in-store stock levels sync automatically — Square and Zettle (via PayPal) both offer this to differing degrees.
A small shop taking £11,000/month in card payments
At this monthly card volume:
| Lopay Standard (0.99%) | £108.90/month |
| Square (1.75%) | £192.50/month |
| Zettle (1.75%) | £192.50/month |
The roughly £84/month gap between Lopay and Square is the cost of the stock, staff and reporting tools Square includes — worth it if you'd genuinely use them, an unnecessary expense if you wouldn't.
Frequently asked questions
What's the best payment system for a small shop?
Square for shops needing stock tracking and a full POS ecosystem; Zettle or Lopay for a simpler range without inventory needs.
Do I need a full POS system?
Only if you have enough product range to benefit from stock tracking and reporting — a simple range may be better served by a cheaper standalone reader.
Compare the full POS market
See every point-of-sale provider side by side.
Methodology: Pricing pulled directly from squareup.com, zettle.com and lopay.com official UK pricing pages on 30 July 2026. Typical basket values are directional estimates for UK independent retail, not an independent survey. See our Editorial Policy.