AWS billing glitch shows trillion-dollar estimates, panicking customers

A bug in AWS's billing system displayed inflated estimates reaching trillions of dollars, causing alarm among users before the company fixed the issue.

This article was drafted with AI assistance from multiple sources and was reviewed and approved by a human editor before publication.

A software error in Amazon Web Services' billing system caused some customers to see wildly inflated cost estimates on Thursday evening, with figures reaching into the trillions of dollars. The issue, which began on July 16, 2026, was traced to incorrect unit pricing in the subsystem that computes estimated bills.

AWS acknowledged the problem on its Health Dashboard at 1:33 AM Pacific on July 17. The company stated that the displayed estimates do not reflect actual usage or charges. In response, AWS paused estimated billing updates and reverted to the most recent accurate billing data, a process expected to take several hours.

On Reddit, users shared screenshots of the inflated amounts. One user reported an estimated bill of $4.2 trillion, while others saw figures ranging from $126,000 to $2.5 trillion. A customer whose previous month's charges were $0.19 saw an estimate of nearly $2.5 billion. User Vatonee wrote, "I nearly had a heart attack when my two S3 buckets with a few MBs of data generated a half-billion-dollar forecast."

The alarming figures prompted some to take drastic measures. User lern_by said, "Needless to say, I panicked and destroyed everything on this account," before learning the charges were erroneous.

By July 17 evening (1903 UTC), AWS reported that it had mitigated the underlying issue and begun backfilling data. Corrected billing amounts were expected by July 18 at noon Pacific. AWS said no customer action is required.