Service is operating normally: [RESOLVED] Inaccurate Estimated Billing Data - AWS Outage

Summary

Between July 16 at 7:38 PM PDT and July 18 at 6:00 AM PDT, we began displaying incorrect estimated billing data in the Billing and Cost Management Console, including the Cost and Usage Report. Customers may have received erroneous budget and cost anomaly detection alerts, and observed inflated estimated cost and usage data. On July 16 at 7:46 PM PDT, our alarms detected cost anomalies but failed to halt the estimated bill generation process or alert our engineering teams. We were alerted to thi

Impact

Between July 16 at 7:38 PM PDT and July 18 at 6:00 AM PDT, we began displaying incorrect estimated billing data in the Billing and Cost Management Console, including the Cost and Usage Report. Customers may have received erroneous budget and cost anomaly detection alerts, and observed inflated estimated cost and usage data. On July 16 at 7:46 PM PDT, our alarms detected cost anomalies but failed to halt the estimated bill generation process or alert our engineering teams. We were alerted to thi

Lessons Learned

⚠AWS has experienced 65 incidents in the past year. This frequency suggests systemic reliability challenges that may warrant additional monitoring.

📊Incidents related to api have occurred 735 times across all providers in the past year. This is one of the most common failure categories in cloud infrastructure.

💡This incident is categorized as: API Issue. Consider implementing preventive measures specific to this failure category.