How can I determine why I was charged for EventBridge usage, and then how can I reduce future charges?

Short description

Review your AWS Cost and Usage Reports to understand your EventBridge charges. Look for charges for the following line items:

CloudWatch Events: AWSEvents PutEvents region-Event(-64K-Chunks)

Note: Items in bold are similar to what you might see in your reports. For example, region represents the abbreviation for your AWS Region, such as USW2-Event-64K-Chunks or USW1-Event.

Resolution

Charges are based on the number of events published to EventBridge event buses. Custom events, events that originate from third-party Software-as-a-Service (SaaS), and events that come from another event bus incur a fee. Events sent from one AWS account to another are billed to the sender account as custom events.

To reduce costs, take these actions:

• Minimize PutEvents calls.
• Reduce the number of events that are sent to an event bus. These events are also charged as custom events.
• Reduce the number of events ingested by Scheme discovery and Event replay.
• Reduce the number of events that API destination targets forward to web-based applications. This can result in charges based on the number of target invocations.

Related information

Amazon EventBridge pricing