AWS Billing Bug Sends Users Estimated Charges of Up to $2.5 Trillion
An AWS billing bug sent users estimated charges of up to $2.5 trillion—including one user with $0.19 in monthly charges who received a $2.5 billion estimate. Amazon paused billing updates and expects corrections by Saturday noon Pacific time.
July 17, 2026 – 6:21 pm
Image by: Tony Webster from Minneapolis, Minnesota, United States
In Brief
An AWS billing bug resulted in estimated bills ranging from hundreds of millions to trillions of dollars. Amazon confirmed it was a unit pricing error and is recomputing all estimates.
AWS users woke up Friday to find estimated billing emails with charges varying from hundreds of millions to $2.5 trillion. The issue stemmed from a unit pricing mistake in the AWS Billing Console’s estimated billing computation subsystem, as acknowledged by Amazon. One Reddit user, whose charges totaled $0.19 last month, received an estimated bill of nearly $2.5 billion. Others reported similar outlandish estimates for their monthly charges.
"The displayed billing estimates do not reflect actual usage and charges." — AWS
Amazon identified the root cause within 90 minutes and halted further increases in the inflated figures by pausing estimated bill updates. They have since begun recomputing all billing data, promising corrected amounts by Saturday, July 18 at noon Pacific time.
The bug initially caused panic among users before they realized it was an error. One Reddit user humorously described their reaction: "I nearly had a heart attack when my two S3 buckets with a few MBs of data generated a half-billion-dollar forecast."
Another user shared, "Needless to say, I panicked and destroyed everything on this account."
Last week, AWS committed $1 billion to forward-deployed AI engineers, underscoring the significance of robust billing systems for managing massive AI workloads. The recent bug serves as a stark reminder of potential errors when handling billions in monthly compute bills.
This incident follows a separate AWS CloudFront outage on the previous day that served errors instead of websites. As cloud infrastructure manages unprecedented spending volumes driven by AI demand, ensuring the reliability of billing systems has become a critical challenge.
By Cristian Dina
CRO at The Next Web and author of "King of Networking," Cristian Dina has interviewed over 300 industry leaders and been recognized by Forbes as one of the top 30 under 30 in 2025.