How to choose a POS system for a small shop
Compare checkout options using real shop tasks, a worked cost example and practical questions about equipment, support and contracts.
Last updated October 31, 2026
Choose a checkout system by testing your shop's real transactions, calculating its full cost and checking how you can leave. A feature list helps build a shortlist, but it cannot show whether a cashier can find a product quickly or a manager can resolve an incorrect return.
Write down the problems you want to solve before booking a demo. If staff spend an hour matching separate card totals to receipts, test the payment connection. If stock records drift, test the whole sale, return and receiving process.
POS requirements checklist
Separate essential functions from conveniences. Give each requirement an owner and a way to prove it works. For a first shortlist, use these questions:
- Can staff sell your actual product types, including variants or weighted goods where needed?
- Are your required payment methods supported in your country?
- Can you find a past transaction and return part of it?
- Can each location keep the stock records it needs?
- Can staff complete a normal shift with the access you intend to give them?
- Can you export the records you need for operations and accounting?
For each item, record the plan, accessory or paid add-on required. Treat an unanswered question as unresolved rather than assuming a feature is included.
POS demo questions
Bring a small basket of representative goods and a short script. Include a product with similar-looking variants, a discounted item and an item without a readable barcode. Ask to perform the steps yourself after the first demonstration.
| Test | Evidence to keep |
|---|---|
| Sell two similar variants | Receipt and stock change for each exact item |
| Decline a card payment | Basket remains understandable, with no false paid sale |
| Return one item from a larger order | Refund record and correct restock choice |
| Change an incorrect price | Approval requirement and activity record |
| Close a shift | Payment totals and a usable export |
Time the work without rushing the cashier. Record confusing steps and repeat them with someone who will use the system every day. A polished demonstration is less useful than an ordinary person finishing an ordinary shift.
POS total cost of ownership
Compare the same number of locations, devices and users over the same period. Include subscriptions, equipment, setup, training, replacement hardware, paid integrations and payment-processing charges. Request a written quote that explains which items can change.
Here is a fictional comparison to show the arithmetic, not market pricing. A shop processes $20,000 in card sales across 800 transactions per month.
| Example offer | Monthly software | Example processing | Combined monthly amount |
|---|---|---|---|
| A | $60 | 2.5% plus $0.10 per transaction = $580 | $640 |
| B | $100 | 2.2% plus $0.15 per transaction = $560 | $660 |
The lower percentage does not produce the lower total in this example. Hardware and other charges are excluded, so these figures are not the complete first-year cost. Use your own mix of transaction sizes, payment methods and quoted fees.
POS hardware compatibility
Give the provider exact device model numbers, connection types and operating-system versions. Ask which combinations it supports today and what happens when a device reaches the end of support. Keep the confirmation with the quote.
For example, Shopify's hardware documentation separates supported readers, scanners, printers and cash drawers. Use the equivalent list for each candidate instead of assuming that existing accessories will carry over.
Can I keep my existing card reader?
Possibly. The answer depends on the model, payment provider, country and checkout integration. Ask whether the reader will exchange payment results with the software or require staff to enter totals separately. Include any replacement or rental cost in the comparison.
POS staff permissions
Test a cashier account, a shift-lead account and an owner account. Decide who should issue refunds, change prices, open the drawer, edit products and export customer information. Then confirm that those restrictions work at the counter and in the administration screens.
The staff access planning guide can help describe the responsibilities. The permissions in your checkout and in other business software still need separate configuration.
POS support questions
Ask when support is available in your time zone, which channels are included and who handles hardware faults. Find out whether a payment issue goes to the software company or a separate processor. Keep a support route that staff can use if the main device fails.
Ask for the written outage procedure. Square's documentation illustrates why details matter: supported offline payment methods have limits, and pending transactions can be lost through certain device or app actions. Each candidate should explain its own recovery steps.
POS contract checklist
Read the subscription and payment-processing agreements together. Check the initial term, renewal, notice period, equipment ownership, cancellation charges, data-export access and any separate agreements for add-ons. Confirm what support or access remains after cancellation.
Ask for a sample export before signing. A dashboard that displays a record does not necessarily let you take that record with you. The migration guide explains which datasets to check.
What should I test before buying a POS?
Run a small pilot with a named manager and clear pass criteria. Complete a sale, a decline, a partial return, a stock receipt, a staff handover and a close. Use the provider's approved test environment or procedure so practice transactions do not get mixed with live trading.
Keep a simple decision sheet: requirement, result, unresolved issue, owner and due date. Resolve essential gaps before committing. If two products pass, choose using the complete quote and the workflow your team can maintain, rather than the longest feature list.