RDS can become one of the biggest costs in an AWS account. Database instance size, storage growth, backups, replicas, and multi-AZ setups can all increase your bill faster than expected.
If your whole bill increased, also check why your AWS bill increased and EC2 cost high.
Simple explanation: RDS costs usually increase because the database got larger, a more powerful instance was used, or backups and replicas expanded.
Last month: £95
This month: £280
Result: More database resources → higher AWS RDS bill
Recommendations:
RDS costs often look stable until a workload grows, a config changes, or backup and storage overhead slowly builds over time.
See exactly what changed in your AWS billRDS can be expensive due to instance size, multi-AZ, replicas, storage growth, and backup retention.
Yes. Backup storage and snapshots can contribute to your RDS bill.
Review instance size, storage configuration, backup retention, and whether replicas are still needed.
Yes. A larger instance, storage growth, or enabling multi-AZ can quickly increase charges.