Pub EPOS system not working? Fix it fast in 2026

Last updated: 11 April 2026

When your EPOS system goes down on a Saturday night, you have maybe 30 seconds before your first customer walks up to an unresponsive till. There’s no time to ring support or panic — you need to know exactly what’s gone wrong and how to get the bar moving again. I’ve been in that position at Teal Farm Pub in Washington, Tyne & Wear during peak trading, and I can tell you that the difference between losing £500 in sales and losing £2,000 comes down to knowing which troubleshooting steps actually work versus which ones waste precious minutes.

Most pub landlords never think about EPOS failures until one happens. Then they discover that their backup plan doesn’t exist, their staff don’t know how to take card payments manually, and their EPOS provider’s support line has a 2-hour wait time. This guide covers what you need to do right now, what you should have done last week, and how to make sure it doesn’t happen during next Saturday’s quiz night with a full house.

Immediate Fixes When Your EPOS Stops Responding

The most effective way to restore a non-responsive EPOS terminal is to perform a hard power cycle: turn off the terminal, turn off your router, wait 30 seconds, turn on the router first, wait 30 seconds, then turn on the terminal. This fixes approximately 60% of EPOS outages in hospitality venues because most failures are caused by lost network connectivity, not hardware failure or corrupted software.

Do not try soft reboots, do not check error messages first, do not ring your provider immediately. The power cycle takes 90 seconds and solves the problem more often than anything else you could do in that time.

If the terminal comes back online and shows normal operation, you’ve solved the problem. Move to the prevention section below to make sure this doesn’t happen again during your next peak trading session. If the terminal still doesn’t respond after the power cycle, move to the next section.

Check Your Internet Connection and Network

Once the hard power cycle is complete and the problem persists, your EPOS system has lost connection to either the internet or your local network. An EPOS system requires a stable internet connection or a functioning local network to operate — if either one fails, the terminal cannot process payments even if the hardware itself is working perfectly.

Here’s what to check in order:

• Look at your router’s lights. Most routers have a light that indicates internet connection status. If that light is off or red, your internet provider has had an outage. Ring them and ask for an ETA on restoration. Do not proceed assuming this will be a quick fix.
• Check if other devices can connect to WiFi. Log into WiFi on your phone or a staff member’s phone. If your phone connects and has internet access, your WiFi is working. If your phone cannot connect or has no internet, the problem is your router or internet connection, not your EPOS system.
• Try connecting your EPOS terminal directly to the router with an ethernet cable if possible. WiFi failures are far more common than wired connection failures. If the EPOS system works when connected via ethernet but not via WiFi, you have a WiFi signal strength problem or a WiFi configuration issue, not an internet outage.
• Restart your router again if your phone can connect but your EPOS cannot. Sometimes a router needs more than one restart to fully reconnect to the internet.
• Check whether your internet bill is paid and your account is active. This sounds obvious, but I’ve seen pubs locked out of service because a direct debit failed and the provider cut the line without warning. Ring your provider to confirm.

If your phone has internet but your EPOS does not after these checks, your EPOS terminal has a connectivity issue that is specific to that device. Move to the hardware troubleshooting section below.

Hardware Failures and What to Do About Them

If your router is working, your internet connection is active, other devices can connect, but your EPOS terminal still will not respond, you’re dealing with a hardware failure. This could be a broken WiFi card, a failed network port, a crashed hard drive, or a display failure.

At this point, you have two choices: attempt to use a backup terminal if you have one, or process payments manually until your provider can send a replacement or engineer.

Most hardware failures in EPOS terminals cannot be diagnosed or fixed on-site by a pub operator — they require replacement or repair by the manufacturer or an authorised technician. Do not spend 20 minutes troubleshooting a hardware failure when you could spend two minutes setting up manual payments and keeping the bar open.

Call your EPOS provider and ask for an emergency replacement or temporary terminal. Tell them you’re in an active outage and need service restored today, not next Thursday. Most providers have same-day or next-morning options for critical failures.

How to Process Payments Manually Until EPOS Is Back Online

This is the most important section of this entire guide because it’s the difference between losing £100 in sales and losing £1,500.

When your EPOS is down and you cannot repair it within five minutes, you need to keep taking money from customers. Here’s how:

• Use a portable card reader if you have one. A portable card reader (like Square, iZettle, or any smartphone-based payment terminal) is a battery-powered device that can process card payments independently of your main EPOS system. If you don’t have one, you should order one today. Cost is usually £30–£60 with no monthly fee. One of these devices on a Saturday night will generate enough revenue to pay for itself within three or four outages.
• Accept cash payments only if you must. Many customers prefer card, and forcing them to use cash during an outage will lose you sales. A portable reader solves this problem entirely.
• Keep a manual imprint pad or a backup card machine. These are increasingly obsolete, but a manual card imprint pad costs nothing and takes up no space. If your EPOS fails and you have no backup reader, an imprint pad lets you take card details and process them manually later. It’s not ideal, but it keeps the bar open.
• Train all staff on manual payment procedures now, not during an outage. Your staff need to know that when EPOS is down, they ring a bell, call you over, and you process the payment on the backup reader. This takes 30 seconds per transaction. During an outage, this is completely acceptable. Without this training, staff will freeze and customers will leave.
• Use our pub staffing cost calculator to work out whether it’s worth having a second EPOS terminal on a separate internet connection. For a busy pub with multiple tills during peak times, a second terminal on a different internet connection is a better investment than any other redundancy system. When your primary EPOS fails, your secondary terminal keeps running. Cost is typically £30–£50 per month for the second connection, which is trivial compared to an hour of lost sales.

During Teal Farm’s busiest Saturday nights, when three staff are hitting the till simultaneously with card-only customers and kitchen tickets running, a single EPOS failure would have shut us down entirely. Once we implemented a backup portable reader and trained staff on the handoff procedure, the same failure now costs us maybe £200 in lost time instead of £1,500 in lost revenue. The insurance policy is worth far more than the cost.

Prevention: What You Should Have Set Up Already

If your EPOS has failed once, it will fail again. The question is not if but when, and whether you’re prepared. Here’s what to implement this week:

Backup Internet Connection

Your primary internet connection goes down roughly once every 12–18 months, usually without warning. A backup connection (typically a 4G mobile router from a different provider) costs £20–£40 per month and eliminates 90% of EPOS outages. When your primary internet fails, your EPOS system automatically switches to the mobile connection and stays online. Staff notice nothing. Customers notice nothing. You lose no sales.

The real cost of an EPOS outage is not the replacement hardware but the lost sales during the outage period — typically £100 to £500 for every 30 minutes of downtime in a busy pub. A £30 monthly backup connection pays for itself on the first outage.

Ask your EPOS provider if they support failover to a mobile connection. If they don’t, ask them to recommend a provider who does, or consult our pub IT solutions guide for vendor-agnostic recommendations.

Offline Mode Capability

Some EPOS systems can operate in offline mode, meaning they can take payments and record transactions locally if internet is unavailable, then sync those transactions to the cloud when the connection returns. This is extremely valuable for pubs because it means you can keep serving customers during an internet outage without losing transaction data.

Check whether your current EPOS system supports offline mode. If it doesn’t, this is a strong reason to consider switching during your next contract renewal. Offline mode is now standard in most modern EPOS systems, so you should not accept a system without it.

Second Terminal on a Separate Connection

For a pub with multiple tills or high transaction volume, a second EPOS terminal on a completely separate internet connection provides redundancy that nothing else can match. When your primary terminal fails, the secondary terminal becomes your primary. This works only if both terminals are on different internet connections — if they share the same router and that router fails, both terminals fail simultaneously.

Cost is typically £50–£100 per month in hardware and connection fees. For a pub generating £5,000+ per week in sales, this is insurance you cannot afford not to have.

Portable Card Reader as Backup

As mentioned above, a portable card reader is a low-cost, high-value redundancy system. Buy one today. Charge it weekly. Test it monthly. Keep it in an accessible location so any staff member can grab it and start processing payments within 30 seconds of an EPOS failure.

When to Call Your EPOS Provider — and What to Tell Them

Once you’ve completed the troubleshooting steps above and the problem persists, it’s time to call your provider. Most providers offer phone support during business hours, but if your outage happens on a Saturday or Sunday, you may get automated voicemail or a second-tier support team.

Here’s what to tell them so you get help quickly:

• Start with: “My EPOS terminal is not responding. I’ve power-cycled the terminal, I’ve power-cycled the router, other devices can connect to WiFi, but the EPOS system cannot.”
• Tell them what steps you’ve already taken — this saves them asking you to repeat them and shows you’re not a beginner.
• Ask for a same-day emergency replacement or a temporary terminal if the repair will take more than one business day.
• Ask whether they have mobile engineers available, or whether the replacement will be shipped.
• Confirm whether they will cover the cost of the engineer visit or shipping, or whether this is a chargeable call-out.
• Get a reference number and a specific time window for the replacement or engineer visit.

During an active outage, be polite but firm. Your provider’s response time is critical. If they cannot offer same-day support, escalate to a manager. Make it clear that this is not a future maintenance issue — this is an active revenue loss.

That said, do not call your provider before you’ve completed the basic troubleshooting steps above. If the problem is an internet outage at your premises, your provider cannot fix it and will just tell you to call your internet provider. Wasting five minutes on a provider call that they cannot help with is five minutes you’re not spending on manual payment setup or contacting your internet provider.

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