AWS billing glitch displays trillion-dollar cost forecasts

A technical glitch in Amazon Web Services' billing system displayed wildly inaccurate cost projections to customers worldwide, with some estimates reaching into the trillions of dollars, before the company intervened to correct the error. The incident, which began on the evening of July 16, 2026, caused widespread alarm but did not affect actual customer charges.

The problem originated in the unit pricing component of AWS's estimated billing computation subsystem, according to the company's Service Health Dashboard. This caused the Billing and Cost Management Console and Cost Explorer tools to generate erroneous forecasts, while actual usage records and final invoices remained unaffected. Amazon first acknowledged the issue late on July 16, Pacific Time, and engineers worked through the night to identify the root cause.

Customers began reporting the alarming figures on forums and social media, sharing screenshots of projected bills that defied reality. Reports included a UK charity that typically pays less than one dollar per month seeing a forecast of 5.8 billion dollars, and other users citing estimates of 1.5 trillion, 2.5 billion, and even 4.2 trillion dollars. One Reddit...