According to BBC News, Monzo users were left unable to use their cards for payments or transfers on 19 August 2026 following a technical problem with the digital banking service. The disruption affected the bank's mobile-first platform, which serves more than 16 million personal and business customers worldwide, BBC reported.
The digital bank posted on X that it had "identified some issues" and activated a stand-in backup service, according to BBC. That service, called Monzo Stand-in, was intended to let customers continue making card payments, withdrawing cash, freezing their cards, and sending and receiving bank transfers. However, some users replied under the post that Monzo Stand-in was "not working as expected" and that they still could not use their cards, BBC reported.
The firm added that it was "rolling out a fix and moving quickly to get full service back up and running for everyone," according to BBC. Monzo was founded in 2015 as a "new kind of bank" that abandoned physical bank branches for a mobile-first app, the broadcaster noted. The company says it now has over 16 million customers using the service around the world.
User reports on X highlighted the gap between the backup service's stated functionality and what customers experienced.
"I can't use my card for anything at the moment," one X user posted.
Another user wrote: "Your 'backup' bank does not have the functionality you state it does. I can't make bank transfers right now."
Monzo Stand-in: stated capabilities vs reported problems
| Service | Monzo Stand-in stated capability | Reported issue |
|---|---|---|
| Card payments | Make card payments | "I can't use my card for anything at the moment" — X user |
| Bank transfers | Send and receive bank transfers | "I can't make bank transfers right now" — X user |
| Cash withdrawal | Withdraw cash | Not reported as failing |
| Freeze card | Freeze your card | Not reported as failing |
Implications for business customers
Because Monzo's customer base includes both personal and business accounts, the outage directly affected card payments and transfers that businesses use for day-to-day cash management. BBC reported that Monzo did not disclose how many of its 16 million customers were impacted, nor the root cause of the technical fault. The bank said it was "moving quickly" to restore full service but did not provide a timeline for completion.
At the time of writing, Monzo had not updated customers on whether the fix had been completed, according to BBC. The incident illustrates the concentration risk in mobile-first banking: a single technical failure can simultaneously halt card acquiring, money movement and account management for millions of users. For corporate treasurers and finance executives monitoring operational resilience, the outage is a reminder of the dependence on third-party digital infrastructure for critical payment flows.
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