Card reader software updates: why they matter

That update prompt on your card reader isn't a nuisance to put off until next week. Card reader software updates fix security problems, keep chip and contactless payments working under current network rules, and sometimes add features or fix bugs. Skipping them can leave your reader exposed or cause payments to fail. The best habit is to let them run at a quiet time.

Here's what actually matters, and how to handle updates without disrupting a busy counter.

What do reader updates actually change?

A card reader is a small computer. It runs software that reads cards, encrypts data, talks to your processor, and follows the rules of each card network.

Updates can change several things.

Security fixes. When a weakness is found, updates close it.

Payment rules. Card networks and the EMV standard behind chip and contactless payments change over time. Readers need updates to keep up.

Connectivity. Updates can fix problems with Wi-Fi, cellular, or connection to your POS.

Bug fixes. A reader that sometimes freezes or fails to read a card may just need an update.

You won't see most of these changes. You'll notice if they're missing.

Why does skipping updates cause trouble?

A reader that's far behind on updates can start failing in ways that are hard to diagnose.

Chip reads may fail more often, pushing cashiers to swipe or key cards, which costs more and carries more risk.

Contactless payments from newer phones or cards may not work.

The reader may lose its connection to your processor after a change on their end.

And a known security weakness stays open.

Here's the straight version: an out-of-date reader doesn't usually fail all at once. It gets a little worse week by week until one Saturday it stops working at the worst time.

When should you run updates?

Pick a quiet time. Early morning before opening or right after closing works for most stores.

Many readers download updates automatically and ask to install. Some install on their own during off-hours. Know how yours works. If you're not sure, ask your provider.

A few rules for a smooth update.

1. Don't unplug or power off the reader during an update.
2. Keep it connected to power and the network until it finishes.
3. Run a small test sale afterward to make sure everything works.
4. If you have more than one reader, update one at a time so you always have one working.
5. Write down the date of the update in case you need to report a problem later.

Don't run an update in the middle of a rush. A ten-minute install at 5 p.m. on Friday is ten minutes without a working reader.

What if an update fails or causes a problem?

Occasionally, an update doesn't go smoothly.

If the reader freezes, wait. Some updates take longer than expected. Give it a reasonable amount of time before doing anything.

If it's still stuck, contact your processor before unplugging it. They may have steps to recover it safely. NRS Pay offers live support seven days a week.

If payments stop working after an update, note the time, any error message, and what you tried. That helps support fix it faster.

If your reader is old enough that updates aren't available anymore, it's probably time to replace it. NRS Pay offers a free card reader with signup. You can see NRS Pay equipment, and the NRS Pay team can tell you whether your current device is still supported.

For general guidance on keeping devices updated, CISA's Secure Our World program covers software updates for small businesses.