Your POS Is Down Mid-Service: What Actually Works

By the My Business Notebook desk · Updated August 31, 2026 · 10 min read · Practical guide

There is a particular silence that falls over a counter when the card reader stops responding. Six people in the queue, two orders already in the kitchen, and a screen that will not move. The first instinct is to blame the wifi and start unplugging things. That instinct costs money: in the September 2023 Square outage, a Pennsylvania ice-cream business with three shops reckoned it lost between $8,000 and $10,000, and one owner told reporters he only worked out it wasn't his connection after hours of trying. This is what to do in the first two minutes, what offline mode genuinely covers, and what to reconcile afterwards.

Thirty seconds to find out whether it's them or you

Almost every wasted hour in an outage comes from the same mistake: assuming the problem is local. It usually isn't obvious which it is, and providers are not reliably quick to tell you. One California shop owner said plainly of the 2023 Square outage that he never got an email or any notification that the problem was on their side, calling it "kind of a bummer" — he had already spent hours suspecting his own connection.

Worth reading next: before you sign anything, check hidden POS fees, then POS contract lock-in. If it applies to you, also read about offline POS system behaviour during power cuts.

Three checks, in this order, take well under a minute:

1. Open any website on your phone using mobile data, not the shop wifi. If the internet works on data but your till doesn't, your broadband is a suspect. If the till still fails on a phone hotspot, the problem is upstream.
2. Check the provider's status page and its social account. Many merchants in 2023 learned about the outage from other users online before hearing anything official. Save both links in your phone now, under a name you'll find while panicking.
3. Ask a neighbouring business on the same street. If the café next door uses the same provider and is also stuck, you have your answer in ten seconds and you have stopped touching cables.

Whatever you find, stop rebooting. Repeatedly restarting a terminal during a provider-side outage achieves nothing and can lose whatever was half-entered on screen.

What offline mode actually covers, and where it fails quietly

Offline mode is sold as the answer to this whole problem. It is genuinely useful, and it is also the single most over-promised feature in the category, because there are two completely different things hiding behind one label.

Recording a sale offline means the till keeps working as a till: it takes the order, prices it, prints or stores a receipt, decrements stock, and syncs the record when the connection returns. This is the part that generally works well, and it is what stops your day turning into a pile of unlabelled paper.

Accepting a card offline is a different thing entirely. The card is not being authorised by anyone at the moment you take it — the payment is stored and submitted later. If it is declined when it finally goes through, or if the stored transaction is lost, the money does not appear. Providers therefore put caps and time limits on it, and typically place the risk on the merchant. Those terms differ by provider and change, so check yours specifically rather than assuming.

And "stored and submitted later" is not a guarantee of "submitted successfully". The most useful single detail to come out of the 2023 outage was from that same ice-cream business: offline mode had only worked in two of its three shops, and afterwards, in the owner's words, "about 30 of those offline transactions appeared to be missing". That is the sentence to remember. Offline card acceptance is a bet, sized by you, on how much you can afford not to be paid for.

Restaurants have a second, sharper version of the problem, because the network doesn't only carry payments. A recurring complaint from multi-site restaurant operators is blunt: "If the internet goes down you not only lose the tickets, but the printers won't print." A kitchen printer that is driven through the cloud stops being a kitchen printer the moment the line drops.

Keeping the queue moving when the till is dead

The goal in the first ten minutes is not to fix anything. It is to stop losing customers who are standing in front of you, and to make sure that tonight you can still say what you sold.

• Put one person on the door or the head of the queue. Tell people what is happening and what you can take. Silence empties a shop faster than bad news does.
• Switch to a duplicate paper pad — one copy to the kitchen or the packer, one kept in order in a clip. Write the item, the price, the payment method and the time. It is slower per order and infinitely faster than reconstructing the day from memory.
• Have a second, independent way to take a card. A cheap standalone reader from a different provider, kept charged in a drawer, is the difference between a bad hour and a closed evening. It matters that it is a different provider: two terminals from the same company go down together.
• Do not free-pour discounts to apologise. Whatever you give away now is invisible in your figures later, precisely because the system that would have recorded it is off.

"Just go cash only" is no longer a plan

The traditional fallback has quietly stopped working, and the 2023 outage showed exactly how. A Miami bakery and smokehouse owner put it in the plainest possible terms: "People don't carry cash anymore, so we had a bunch of people just leave without buying anything. People don't carry cash and people don't want to take 10-15 minutes to drive to the ATM." His estimate for the day was around $2,000, with the evening service hit hardest.

Cash still belongs in the plan, but as one lane among several, not as the plan itself. If your average basket is small and your customers are local and regular, a cash-only hour is survivable. If you are on a high street, in a food court, or serving people who are passing through once, it is not a fallback, it is a closure.

The part everyone skips: reconciling afterwards

The outage ends, the queue clears, and the temptation is to never think about it again. That is where the second, quieter loss happens.

1. Enter the paper tickets into the system the same day, before the details fade. Not tomorrow.
2. Compare stored offline payments against what actually settled. This is the specific check that catches the missing-transactions problem. Count how many offline payments you took, then count how many appear in your settlement. If the numbers differ, you have a claim to make while you still remember the sales.
3. Reconcile stock, not just money. Anything sold on paper has left the shelf without the system knowing. Skipping this is how an outage turns into a phantom shrinkage problem three weeks later.
4. Write down what it cost you — sales lost, hours lost, payments never settled. That number is your negotiating position, and it is also how you decide whether a second reader is worth its monthly fee.

The other kind of outage: being locked out of your own account

Not every outage is technical. A less visible version, reported by restaurant owners on review sites, is administrative: the account is suspended or under review, and the business simply cannot get in. One owner's summary was "I could not access my own business for more than 20 hours" — while still subscribed and still being billed.

The practical defence is the same in both cases and it is boring: keep a copy of your own data somewhere the provider does not control. A monthly export of sales, customers and stock, saved locally, means an account lockout costs you a day of trading instead of your history. It is also, not coincidentally, the thing that makes leaving a provider possible at all.

What to look for in a till, with this in mind

A ten-minute drill to run once, before you need it

Pick a quiet morning and actually do this. It is the difference between a plan and a hope.

• Turn the wifi off at the router with a member of staff on the till, and ring up three sales. Note what still works and what doesn't, including the kitchen printer.
• Find your provider's offline terms — the per-transaction cap, the window, and who carries a decline — and write the numbers on a card taped inside the till drawer.
• Save the status page and support number in every manager's phone, not just yours.
• Put a charged backup reader and a duplicate pad in a known drawer. Tell the team where it is.
• Export your data once, so you know the export works and how long it takes.

None of this stops an outage. What it does is decide, in advance and calmly, how much a bad afternoon is allowed to cost you.

Frequently asked questions

Sources

The merchant accounts quoted here are from named, published reporting and public review pages. Check them at source rather than taking our word for it.

• NBC News, on the September 2023 Square outage: named merchants with figures, including the ice-cream business and the Miami bakery quoted above.
• EcommerceBytes, on the same outage: the account of offline mode working in only two of three shops, and roughly 30 offline transactions missing afterwards.
• Capterra, Square Point of Sale reviews: merchant reports on connection dependence, including lost tickets and silent kitchen printers.
• Capterra, Toast POS lowest-rated reviews: the account of being locked out of a business account for more than 20 hours.