Square's recent record is mixed: 99.16% availability, a B reliability grade, and 1 major incident totaling 17 hours 10 minutes of downtime in StatusBird's independent monitoring over the last 90 days.
Numbers alone do not tell you whether to worry, so this post also covers what actually breaks when Square has problems and how to get warned early.
What is Square?
Square is a payments and commerce platform best known for in-person card processing through its readers and POS app, and it also powers Square Online stores, invoices, and e-commerce payment APIs. Many merchants use Square as their combined system for retail and online sales, with a shared catalog, inventory, and customer directory. Sellers on other platforms can also use Square purely as an online payment gateway.
Square uptime and outage history
| Metric (90 days, as of July 2026) | Value |
|---|---|
| Availability | 99.16% |
| Reliability grade | B |
| Major incidents | 1 |
| Total major-outage downtime | 17 hours 10 minutes |
| Average incident duration | 17 hours 10 minutes |
| Most recent major incident | May 01, 2026 |
| Checks in window | 61,615 |
Among the 11 payment processing services StatusBird monitors, Square ranks number 11 for 90-day availability. See the full ranking of payment processing tools by reliability.
What happens to your store when Square goes down?
A Square outage can stop card payments both in person and online at the same time. In-store, card readers and the POS app fail to authorize charges, forcing staff to turn customers away or take cash. Online, Square Online stores can fail at checkout and Square-powered payment forms on other sites decline or hang. Inventory, reporting, and the seller dashboard can also become unavailable, and split incidents sometimes hit payments while the dashboard still loads, or the reverse.
Typical symptoms during a Square outage:
- Card transactions declining or hanging at the point of sale
- Square POS app showing connection or processing errors
- Square Online store checkout failing for customers
- Square Dashboard unreachable or missing recent transactions
- Invoices and payment links failing when customers try to pay
If you are in the middle of an incident right now, see what to do when Square goes down for a step-by-step playbook.
Frequently asked questions
A customer's card was charged but Square never showed the sale. Did the payment go through?
During an outage a charge can authorize on the card network but fail to record on Square's side, or the authorization may simply drop off the customer's statement in a few days. Do not immediately recharge the customer. Wait for Square to recover, check the transactions list for the payment, and only then charge again if it is truly absent.
Should I use Square's Offline Mode during the outage?
Offline Mode helps when your internet is down, and during some Square outages it can keep card capture working, but understand the tradeoff: payments are only authorized later, and if a card is then declined you have already handed over the goods. Use it for trusted, lower-value transactions and prefer cash for large sales.
How this data is measured
StatusBird checks Square's status every 2 minutes, around the clock, independently of the vendor. The availability figure counts major and critical outages only; minor degradation is excluded so numbers are not skewed by vendors that report small blips near-continuously. Grades run from A+ to F. See the live numbers on the Square reliability page and current status on the Square status page, or browse all 84 service grades.
Know before your customers do
StatusBird monitors Square and 83 other services online stores depend on, plus your own storefront, every 2 minutes. When something goes down you get an SMS, email, or Slack alert with plain-English context, usually before the official status page catches up. Start monitoring free, no card required for the free plan.