Plugging an ATM into the venue’s internet is free. A cellular modem costs a one-time $99–$150 and a data plan in single-digit dollars a month. Here is when each is the right choice, and why a $30 monthly connectivity fee deserves a question.
An ATM needs a small, steady internet connection, and there are two ways to give it one. Ethernet into the venue’s existing router costs nothing. Cellular costs a one-time $99 to $150 for a modem plus a data plan from roughly $6 to $10 a month. Anyone charging $30 a month for connectivity is charging a markup.
That gap is the reason this page exists. Connectivity is one of the few ATM costs where the honest answer is both simple and cheaper than what is commonly sold. This guide covers what each option costs, where each one is genuinely the better choice, and what to ask a provider before you pay for either.
Very little. Each withdrawal sends a short encrypted authorization message to the processor and gets a short reply, so an ATM uses a tiny fraction of what a phone or a point-of-sale system does. It does not need speed. It needs a connection that stays up, because a machine that cannot reach its processor cannot dispense cash.
That shapes everything else. Bandwidth is irrelevant, so the cheapest data tier a cellular carrier offers is usually more than enough. And uptime is everything, so the right choice is whichever connection will be most dependable at that particular spot in that particular building.
Whenever the venue has a reliable network, a free port near the machine, and is happy to share it. A cable from the router to the ATM costs nothing to run each month, adds no hardware to fail, and uses a connection the business already keeps working for its own card terminals. For most indoor retail placements, that is the default.
The one practical risk is that you do not control it. A staff member unplugs the router to reset the music system, the venue changes internet providers, or someone moves a cable during a remodel, and your machine is offline until someone notices. Remote monitoring shows you when that happens, and a short conversation with the manager when the machine goes in prevents most of it.
The venue should also understand what it is agreeing to. On a current machine, the ATM’s traffic to the processor is encrypted, but a business that takes card payments may still want the ATM on a separate port or network segment from its own point-of-sale system, which is good practice in any case.
When ethernet is not practical: there is no network drop near where the machine has to go, the venue will not share its network, the network belongs to a landlord rather than the business, or the business wants the ATM entirely separate from its own systems. Cellular also makes a machine independent of the venue’s internet provider and its outages.
A cellular setup is a small modem inside or beside the ATM, with a SIM card on a data plan and usually a small antenna. Dealers sell ATM-specific modems at roughly $99 to $150; one common model lists at $129. Data-only SIM plans suited to devices like this start at single-digit dollars a month — one carrier’s 1GB plan lists at $8 — which is more data than an ATM will use.
Many older machines connect through a phone-line modem rather than a network port. ATM cellular modems are commonly built for exactly this: they plug into the machine’s phone connection and carry the dial-up traffic over the cellular network, which is how a lot of older machines are still processing without a phone line.
| Option | Setup cost | Monthly cost | Reliability depends on | Who controls it | |
|---|---|---|---|---|---|
| Ethernet on the venue’s network | A network cable | $0 | The venue’s router and internet provider | The venue | |
| Cellular modem you own | About $99–$150 one-time | About $6–$10 for a data-only SIM | Signal strength at the machine’s exact spot | You | |
| Bundled wireless from a provider | Often $0 or low up front | Commonly around $30 | Signal strength, plus the provider’s terms | The provider, under contract |
A bundled plan — a provider supplies the modem and bills a flat monthly connectivity fee, often around $30 — is the most expensive way to connect an ATM. At $30 a month against a data plan costing single-digit dollars, you pay back the price of your own modem within about six months and keep paying the difference for as long as the contract runs.
Bundles are not always a bad deal. Some include support, replacement hardware, or carrier management that is worth something to an owner who never wants to think about a SIM card. The point is to see the fee for what it is: a service markup, not the cost of connectivity. If it is worth $20 or more a month to you in convenience, keep it. If it is not, buy the modem.
Watch for connectivity charges that turn up in less obvious places, too, such as a monthly network or communication fee on a processing statement. How to Read an ATM Processing Statement shows where padded fees hide.
Walk the site before the machine arrives and answer these in order:
Whether you are buying a modem outright or signing up for a bundle, a few questions separate a fair deal from an expensive one:
A provider with good answers to all six is worth considering even at a premium. One that cannot say which carrier it uses, or will not put the contract terms in writing, is telling you something useful before you sign.
No. The connection only carries messages between the machine and the processor. Transaction fees, settlement timing, and what each withdrawal earns are the same whichever connection the machine uses. The only processing question is whether the machine stays online, and that is a matter of placement, signal, and the venue’s network.
For how the transaction itself flows from the keypad to the customer’s bank and back, see How ATM Processing Works. For the full ownership cost of a machine, connectivity included, see How Much Does an ATM Machine Cost?. Blueprint processing charges per transaction with no monthly connectivity or statement fees; the processing page has the details.
Most retail ATMs connect through an ethernet port or a phone-line modem rather than Wi-Fi, and the common wireless option is a cellular modem rather than the venue’s Wi-Fi. A wired connection to the venue’s router is the simplest free option; where that is not practical, a cellular modem with its own SIM keeps the machine independent of the venue’s network.
ATM-specific cellular modems generally sell for about $99 to $150 as a one-time purchase, plus a data-only SIM plan from roughly $6 to $10 a month. An ATM uses very little data, so the smallest plan a carrier offers is usually enough. Some providers bundle the modem into a monthly fee instead, typically at a much higher total cost.
It is a markup. A data plan for an ATM costs single-digit dollars a month, and an owned modem pays for itself in about six months against a $30 fee. A bundle can still be worth it if it includes support or hardware replacement you value, but see the fee as a convenience charge, not the actual cost of connectivity.
A current ATM encrypts its traffic to the processor, so sharing a connection does not expose card data to the venue. A business that processes card payments may still prefer to keep the ATM on a separate port or network segment from its own point-of-sale system, which is sensible practice. If the business would rather not share at all, cellular removes the question.
It cannot authorize withdrawals, so it stops dispensing cash until the connection returns. The fix depends on the cause — a venue router reset, a cable pulled, a weak cellular signal. Remote monitoring alerts you quickly, and a location with frequent drops is usually better served by the other connection type.