Here's a cost calculator: https://calculator.aws/#/addService/RDSPostgreSQL https://calculator.aws/#/addService/RDSPostgreSQL My rule of thumb is about $1,000

Here's a cost calculator: https://calculator.aws/#/addService/RDSPostgreSQL https://calculator.aws/#/addService/RDSPostgreSQL My rule of thumb is about $1,000 per month for a reasonably large DB in RDS.