The ease of provisioning a commercial database on AWS RDS masks a massive premium that compounds hourly.

Situation

Teams migrating quickly to the cloud often use AWS RDS for their existing Oracle or SQL Server workloads. During the provisioning wizard, they accept the default “License Included” pricing model to avoid the bureaucratic hassle of license procurement.

The Problem

“License Included” pricing bundles the compute cost with the software license cost. However, AWS applies a significant markup. For Oracle Enterprise Edition or SQL Server Enterprise, the license component of the RDS hourly rate can exceed the cost of the underlying EC2 compute by 3x to 5x.

The Bring Your Own License (BYOL) Alternative

AWS offers a BYOL model, but it comes with stringent requirements. For Oracle, you must ensure you are adhering to the Oracle Cloud Policy, which changes how core factors are calculated. For SQL Server, Microsoft’s licensing terms often require moving to EC2 Dedicated Hosts to fully realize the value of your Software Assurance.

In Practice

A documented pattern among enterprise migrations is that running commercial engines on RDS License Included is financially unsustainable at scale. Organizations that perform a licensing audit before migration often discover they can leverage existing Enterprise Agreements via BYOL, cutting their RDS spend drastically.

Where It Breaks

StrategyTradeoff
EC2 Dedicated HostsReduces SQL Server licensing costs but shifts the burden of high availability, patching, and backups back to your DBA team, eliminating the benefits of RDS.
Oracle Core FactorOracle does not recognize AWS hyper-threading as equivalent to physical cores, meaning you often need to purchase twice as many licenses to cover the same vCPU footprint.

What to Do Next

  • Problem: RDS License Included pricing is punitively expensive for enterprise databases.
  • Solution: Audit existing licenses and evaluate BYOL on RDS or EC2 Dedicated Hosts.
  • Proof: BYOL architectures routinely save 40-50% on AWS commercial database bills.
  • Action: Compare your potential savings using our SQL Server Cloud Licensing Calculator.