This article explains how to identify and analyze Amazon VPC peering charges following billing changes implemented in April 2025, when intra-region VPC peering charges were separated from general data transfer billing.

• VPC peering charges now tracked separately under "VPC Peering" product family instead of "Data Transfer"
• Usage types changed from "DataTransfer-Regional-Bytes" to region-specific "VpcPeering-In/Out-Bytes" format
• Data transfer within same availability zone remains free; charges apply only for cross-AZ transfers
• AWS Cost Explorer can filter and visualize VPC peering costs using new usage type filters
• Custom reports can be saved in Cost Explorer for ongoing monitoring
• AWS Data Exports and Legacy CUR provide SQL query examples for pre and post-April 2025 analysis
• AWS Bills console now displays VPC peering under Virtual Private Cloud section instead of Data Transfer

The billing change provides enhanced transparency for tracking inter-VPC networking costs, enabling customers to better monitor and optimize their data transfer expenses across peered VPCs.