EventBridge Pricing Calculator - Event Buses, Pipes, Scheduler & More

Event Bus is ideal when you need to route events to multiple targets or want decoupled architectures. EventBridge Pipes at $0.40/million is better for point-to-point integrations where you have a single source and target - it's 60% cheaper than Event Bus ($1.00/million) and includes built-in filtering, enrichment, and transformation.

EventBridge Scheduler includes 14 million free invocations per month across all regions - this is a permanent free tier, not limited to 12 months. After the free tier, you pay $1.00 per million invocations. For most development and moderate production workloads, you'll stay within the free tier.

Events are metered in 64 KB chunks for Event Bus, Pipes, and API Destinations. A 256 KB event counts as 4 billable events. Schema Discovery uses smaller 8 KB chunks. Keep payloads small by sending only necessary data and storing large payloads in S3 with just a reference in the event.

Delivering events to services in the same AWS account is free. Cross-account delivery costs $0.05/million for custom and partner events, or $1.00/million for AWS management events. Same-account delivery to Lambda, SQS, SNS, Step Functions, and other targets has no additional charge beyond the event ingestion cost.

Event Replay has three cost components: Archive Processing at $0.10/GB for data archived, Storage at $0.023/GB-month for archived data, and Replayed Events charged at the custom events rate ($1.00/million). Only archive events you genuinely need to replay to control costs.

Schema Registry is completely free - storing and using schemas costs nothing. Schema Discovery, which automatically detects event schemas, includes a 5 million event free tier per month, then costs $0.10/million. Discovery events are metered in 8 KB chunks (smaller than the 64 KB for Event Bus).

You pay EventBridge costs (Event Bus at $1.00/M or Scheduler with 14M free) plus Lambda execution costs. Same-account delivery to Lambda is free - you only pay for event ingestion. For scheduled tasks, EventBridge Scheduler is often more cost-effective than CloudWatch Events, especially with the generous 14M monthly free tier.