Every AWS price change CostMon tracks that actually moved a bill, cuts and increases both, with the source and what to do about it.https://costmon.comhttps://costmon.com/price-changes#aws-vpc-encryption-controls-new-chargehttps://costmon.com/price-changes#aws-vpc-encryption-controls-new-chargeAfter a free preview that ran from November 2025, AWS began charging a fixed hourly rate for every non-empty VPC running Encryption Controls in monitor or enforce mode. Empty VPCs stay free. The announcement itself doesn't print a rate. AWS's VPC pricing page puts it at $0.15 per hour in US East (N. Virginia), rising to $0.31 in the priciest regions. ($0.15 / VPC-hour (us-east-1)) — Audit which VPCs need enforce mode versus monitor mode, and turn it off on non-empty VPCs where it isn't earning its per-hour charge. Check your own region's rate too; it's up to twice the US East price.Sun, 01 Mar 2026 00:00:00 GMTAWSNew chargehttps://costmon.com/price-changes#aws-ec2-gpu-instances-price-cut-2025https://costmon.com/price-changes#aws-ec2-gpu-instances-price-cut-2025On-Demand pricing dropped across the P5, P5en, P4d, and P4de instance families: P5 by up to 45%, P5en by up to 26%, P4d/P4de by up to 33%. (up to −45% (P5)) — Compare the new On-Demand rate against your existing Savings Plan commitment. It may no longer be worth the lock-in.Thu, 05 Jun 2025 00:00:00 GMTAWSCuthttps://costmon.com/price-changes#aws-guardduty-malware-protection-s3-cuthttps://costmon.com/price-changes#aws-guardduty-malware-protection-s3-cutThe per-GB price for the data-scanned dimension of Malware Protection for S3 dropped from $0.60 to $0.09 in US East (N. Virginia), applied automatically to existing customers. (−85% ($0.60→$0.09/GB)) — Re-run the cost projection for buckets you skipped scanning because it was too expensive. Coverage that didn't pencil out before likely does now.Thu, 06 Feb 2025 00:00:00 GMTAWSCuthttps://costmon.com/price-changes#aws-ipv4-free-tier-750-hourshttps://costmon.com/price-changes#aws-ipv4-free-tier-750-hoursNew AWS accounts get 750 hours a month of public IPv4 usage at no charge when they launch an EC2 instance with a public address. That's enough to cover one always-on instance. (750 IPv4-hrs/mo free) — Don't assume this offsets your bill. Check whether your account qualifies as "new" before crediting it against the IPv4 charge.Thu, 01 Feb 2024 00:00:00 GMTAWSFree tierhttps://costmon.com/price-changes#aws-public-ipv4-chargehttps://costmon.com/price-changes#aws-public-ipv4-chargeEvery public IPv4 address across AWS started accruing an hourly charge, whether it's attached to a running instance or just sitting on an Elastic IP nobody released. (+$0.005 / IP-hour) — Run VPC IP Address Manager's Public IP Insights, move workloads behind a shared NAT gateway or load balancer, and release unattached Elastic IPs.Fri, 28 Jul 2023 00:00:00 GMTAWSNew charge