How to Choose the Best Point of Sale System for Retail

Two years ago a friend asked me to help pick a POS for her plant shop. She'd been quoted $1,900 for hardware, a 36-month contract, and 2.9% + 30¢ per transaction. I asked one question: "What happens when you want to leave?" The salesperson went quiet. That silence is the whole ballgame.

Choosing a point of sale system for retail isn't really about features. Every modern POS does the basics—you ring up a sale, it updates stock, it prints a receipt. The decision lives in the fine print: swap fees, lock-in, how the thing handles a size-8 blue t-shirt versus a size-8 red one, and whether your online store and your counter ever talk to each other. Get those right and you'll save yourself a year of quiet resentment. Get them wrong and you'll be the person on a forum at 11pm asking how to break a contract.

What actually drives the cost of a retail POS

The advertised price is a decoy. When I started helping small shops pick systems, I used to compare the $0-versus-$89/month headline. Wrong move. I ran the numbers on a modest store doing 300 transactions a week at an average ticket of $24 and the picture flipped: at 2.6% + 10¢ versus 2.9% + 30¢, the difference was roughly $1,700 a year. More than every subscription combined.

Here's the thing: payment processing is where most POS companies make their money, not on the software. That's why "free" POS plans exist—you're paying through the swipe. And that's why hardware sometimes comes locked to a processor.

What to actually add up

• Transaction fees: percentage plus a fixed per-swipe charge, sometimes with a separate rate for online payments
• Hardware: one-time purchase, lease, or "free" with a contract—read which
• Per-employee or per-register fees: a second till often means a second subscription line
• Migration cost: exporting years of customer and inventory data is rarely clean
• Optional modules—loyalty, gift cards, e-commerce sync—that suddenly aren't included

I made this mistake myself on a project: I budgeted the software, ignored the per-transaction markup, and the quarterly card statement was about 40% higher than my spreadsheet predicted. Spreadsheet was wrong, not the processor.

The variant test: your first real filter

Retail isn't coffee. You don't sell one flat white. You sell a hoodie in four sizes, six colors, and two fits—and if the POS can't handle that cleanly, you'll be doing inventory reconciliation on paper by month three.

When you're evaluating candidates, don't ask "does it support variants?" Everyone says yes. Ask to see it done live:

• Can you scan one barcode and pick a size from a grid on screen?
• Does receiving a shipment let you enter quantities per size per color, or must you do them one by one?
• Can you print a price label or barcode for a variant on the spot?
• Does a return of a specific size adjust the right variant, or dump it into a generic bucket?

I watched a shop demo a POS that handled variants beautifully on a tablet—then discovered label printing required a separate add-on subscription. Real problem? Only if you print labels. Which most clothing retailers do. Check before signing.

Clover or Square—which is better for your store?

Neither wins outright. They're built for different shapes of business, and the honest answer depends on volume, hardware needs, and how much you hate being locked in.

	Clover	Square
Contract	Often multi-year through a reseller; terms vary by who sells it to you	Month-to-month, no long-term lock-in
Hardware	Purpose-built retail terminals, sturdier for high-traffic counters	Cheaper, simpler, iPad-based or all-in-one
Extras	Rich app marketplace, but many are paid add-ons	Tighter built-in ecosystem, fewer surprises
Best for	Established shops with steady volume and a real counter	Small or new stores, pop-ups, fast setup
Watch out for	Early-termination fees and reseller pricing that varies wildly	Processing rates that climb quietly as you scale

My take: if you're a brand-new shop under a certain revenue ceiling and value flexibility, Square is the safer bet—you can walk away. If you're established, doing steady volume, and want a rugged terminal on a fixed counter, Clover's hardware is genuinely better—provided you negotiate the contract terms and know the exit fee before you sign. I'll die on that hill: nobody should sign a 36-month POS contract without the termination clause in writing.

Does your POS talk to your online store?

Sell the same item in a shop and on a website and you have a stock problem with two mouths. A customer buys the last medium online at 2am; your morning register still thinks it has three. Next day someone buys the medium in-store and you're shipping an apology email.

Real test: set up a single product in both systems, sell it online, and check whether the register reflects it within a minute. Do it before you commit, not after. If the sync is "nightly" or batch-based, that's not sync—that's a countdown to a double-sale.

Quick check for omnichannel

• Shared product catalog across channels, not two separate lists you maintain by hand
• Real-time or near-real-time stock deduction on both ends
• Buy-online-pickup-in-store support, if you plan to offer it
• One customer record, not a separate loyalty list for each channel

How to choose the best POS system, step by step

Here's the method I've settled on after too many demos and a couple of buyer's-regret stories.

1. Write down your real workflow first. One page: how a sale happens, how stock arrives, how returns are processed, what your busiest hour looks like.
2. Run the transaction math. Estimate monthly volume and average ticket, then calculate fees across two or three processor options. Compare the annual difference, not the monthly line.
3. Demo with your product, not theirs. Bring a real variant-heavy item—the hoodie in four sizes—and watch them ring, return, and stock it.
4. Ask the contract questions out loud. Termination fee? Notice period? Is hardware locked to the processor? Who owns your data if you leave?
5. Test the sync and the label printer. Both, with a real product, before signing.
6. Check the support channel. Phone support at 9am on a Saturday matters more than a slick dashboard.

The checklist isn't glamorous, but it filters out the traps. In my experience, the ~30 minutes of prep before the demo saves weeks of regret after.

A few questions worth asking yourself

What are the best point of sale systems for retail stores?

There's no single "best"—it depends on your setup. For small, new, or flexible shops, Square is a strong default because of its no-lock-in model. For established counters with steady volume, Clover's hardware is more rugged. Shopify POS is worth a serious look if your online store lives on Shopify and sync matters to you. The right answer is the one whose contract you can live with.

What is the best POS software for a retail store?

If your priority is a shareable product catalog and channel sync, Shopify POS is compelling. If it's simplicity and speed of setup, Square's software wins. Judge by whether the software handles variants, printing, and returns cleanly, and whether it fits the workflow you wrote down.

What POS system works well for a small business?

For most small retail operations, a month-to-month plan with affordable hardware and clear processing rates is the safer bet. Avoid long-term contracts until you've proven your volume and settled on a workflow. Start lean; upgrade the hardware once the register is the bottleneck, not before.

The question that matters most

Every POS will ring up a sale. The one worth choosing is the one you can walk away from without a penalty, that handles your variants without a fight, and that keeps your online and in-store stock telling the same truth. When you're standing in the shop at 7pm reconciling a return that "just doesn't match," you'll be glad you asked about the exit clause and the variant grid—not the marketing brochure. Pick the system that makes tomorrow boring.