Free POS software: what you're actually paying, and where it stops
Free POS software is the most commercially loaded "free" in business software, and it is worth understanding why before you put your till on one.
A point of sale sits directly on your money. Whoever supplies it is adjacent to every transaction you take, which makes free software a rational thing for them to give away — not out of generosity, but because the software is not the product being sold. That does not make it a bad deal. It makes it a deal you should read.
We do not rank POS vendors here. What this page does is explain the four arrangements that get called free, what each one actually costs, and which capabilities disappear at the free tier.
The four kinds of free POS system
1. Free software, paid processing — by far the most common
You get the point of sale software at no cost, and the supplier processes your card payments. The software is a customer-acquisition cost for the payments business.
What it costs you: a percentage of everything you sell, forever. Because processing is charged on turnover and software is charged monthly, the free software is worth a fixed amount per year while the processing costs a variable amount that grows with your success.
This can genuinely be the best available deal, particularly at low volume. It stops being obviously good at higher volume, and the moment to check is before you are locked in, because the lock is the real term of the agreement.
The question that matters: can you use a different payment processor with this software? If the answer is no, you are not choosing free software — you are signing a payments contract with an unpriced exit. Work out the annual difference between their effective rate and an independent one on your card turnover. That figure is what the free software actually costs.
2. Free tier of a commercial POS
A capped version of a paid product. Usually limited by register count, location count, product count or staff logins.
What it costs you: the cap, and it is usually registers or staff — which is to say, the free plan works until the shop gets busy enough to need a second till or a second person with their own login. Check what the first paid tier costs per register, because that is the actual price of the system.
3. Open source point of sale
Genuinely free software you host and run. Real projects with real deployments.
What it costs you: you own the installation, the updates, the hardware integration and the payment integration. That last one is the hard part. Card readers speak proprietary protocols and certification requirements apply to anything touching card data — this is meaningfully harder than self-hosting a website, and it is where most open source POS projects ask you to bring your own integration.
Realistic when you have technical capacity and an unusual requirement. Not a shortcut to avoid a subscription.
4. Free trials dressed as free plans
Worth naming because the marketing is deliberately ambiguous. "Free" that becomes a subscription after thirty days, or "free" hardware that is leased into a three-year contract you cannot exit.
Read what happens at the end, and read the contract length on the hardware separately from the software.
What free tiers actually drop
Comparing free POS plans on features is unhelpful because they all list the same things. More useful is knowing which capabilities the market considers standard, so you can see what is missing.
From a hand-counted inventory of 60 real retail POS products:
| Capability | Found in |
|---|---|
| Cashier sell / checkout | 60 of 60 (100%) |
| Actual stock visibility — real rows with movement history | 58 of 60 (97%) |
| Source-backed reporting — drills to exact source rows | 51 of 60 (85%) |
| Customer context — history and loyalty | 44 of 60 (73%) |
| Tender handling — cash, change, split, card | 36 of 60 (60%) |
| Multi-location and transfers | 34 of 60 (57%) |
| Returns, refunds and exchanges | 29 of 60 (48%) |
| Register / shift / cash close with variance | 18 of 60 (30%) |
| Staff permissions and approval at the point of work | 16 of 60 (27%) |
Every product can take a sale. That is table stakes and no reason to choose anything.
Where free tiers actually stop is further down. In practice the first four things to disappear are:
Stock that reconciles. Many free tills show a stock number that is decorative — it decrements on a sale and has no movement history, so when it disagrees with the shelf there is nothing to investigate. Nearly every real product implements this properly; cheap ones fake it.
Reporting that drills through. A dashboard of totals is easy. Totals you can click into and land on the exact transactions behind them are not, and only that version is useful when a number looks wrong.
The cash-close lifecycle. Open float, cash in and out during the day, a counted close and a variance figure. Under a third of products implement the full trading day even at full price, and free tiers almost never do. If you take cash, this is the difference between knowing you were short on Tuesday and finding out at year end.
Returns and exchanges. Fewer than half of all products do this thoroughly, because a refund has to reverse every ledger the sale wrote — stock, cash, tax, loyalty. Free tiers often implement a refund as a negative sale, which balances the till and quietly corrupts stock and reporting.
How to test a free POS in an afternoon
Do these five things during the trial, at the counter, not in a demo:
- Sell an item, then refund it, then check stock. The item must return to stock, the cash position must reverse, and both must appear in the day's report as distinct events. A negative sale is not a refund.
- Do an exchange with a price difference. Customer returns a £20 item and takes a £25 one. Many systems cannot express this at all and force staff into two transactions, which breaks the audit trail.
- Open a float, take cash sales, then close and count. If there is no variance figure at the end, the system cannot tell you when the till is short.
- Click a number in a report. If it does not take you to the transactions that produced it, the reporting is decorative.
- Change a product's price mid-day, then look at yesterday's receipt. Historical receipts must show what was actually charged, not today's price. Systems that get this wrong make every past report unreliable.
Those five take an afternoon and tell you more than any comparison table.
Getting off a free POS later
Migration matters more here than in most software, because a till holds records you are legally required to keep and balances that belong to customers. Plan the exit before you need it.
Transaction history is the hard part. You need historical sales for tax, and you need them for returns — a customer coming back in eight weeks with a receipt from the old system. Most free point of sale software will export sales as a flat file; almost none will let a new system import them as real transactions. The practical answer is to export everything before you leave, keep it somewhere durable, and expect to handle old-receipt returns manually for a return-window period after the switch.
Customer balances are money you owe. Gift cards, store credit and loyalty points are liabilities. If they cannot be exported with balances intact, you have to settle or honour them manually, and customers will present them long after you have forgotten. Get the balance export before you commit to a free POS system, not when you leave it.
The product catalogue is the easy part, and the one everyone worries about. It exports and imports fine nearly everywhere. Barcodes, prices and categories move cleanly.
The payment relationship may not move at all. If your free software came bundled with processing, changing software means changing processor: new merchant account, new underwriting, new hardware in many cases, and possibly a gap. That is the switching cost the free tier never mentions, and it is why the lock question matters on day one rather than at renewal.
A sensible precaution while you are still on the free plan: export the full transaction history and customer balances once a quarter and keep the files. It costs nothing and it converts a hostage situation into an inconvenience.
When free is right, and when it is the expensive option
Free is right when your card volume is low, you are testing a concept, you run a market stall or pop-up, or you need a till this week. The processing percentage on small turnover is small in absolute terms, and the software genuinely is free.
Free may be more than you need. If takings rather than products are all you track, a plain cash register may still be the correct answer — and if you are choosing between paid products, POS system for small business has the counted feature list from 60 of them with a test for each.
Free is the expensive option when your turnover is significant and the processor is locked. At that point you are paying a variable fee, forever, growing with the business, for software whose paid equivalent is a fixed monthly figure. Run the arithmetic in POS system cost — the comparison is usually not close, in one direction or the other, and which direction depends entirely on your volume.
The third option is now viable in a way it was not recently: building the counter your shop actually needs, and choosing your processor separately. A coding agent can produce a working till in a couple of days. The reason to consider it is almost never cost of software — it is the lock. If your payment arrangement is welded to your software, then owning the software is what buys back the ability to negotiate the largest line in your costs.
The honest caveats: payment integration and certification are real work and the part to plan around; and left to guess, an agent will build the sale screen beautifully and stop before the register close, the exchange workbench and the permissions that stop staff discounting to friends. Those are the parts that separate a demo from a till.
POS system cost works through the four components and the three-year arithmetic. And if you are building, the Retail POS planner is the specification we hand our own coding agents — cashier-first, durable receipts, reversible money, and controls that hold under a real trading day.