Lambda pricing for Starting and Stopping Ec2 instances

Lambda has 2 cost dimensions: Number of invocations and GB-s. I assume you will invoke the function once to launch the EC2 instance and once to stop it. This means 2 invocations. For GB-s you should probably use a function with a small amount of memory. The function will run for a short period as the Start instance and Stop instance are asynchronous. If you want to wait until the instance is actually running or stopped, you will need to run a loop to check the status. In that case, I would recommend to use Step Functions instead of a Lambda function.

Dear Rajesh,

Try using AWS pricing calculator . I don't think it will cost that much if you are going execute lambda 4-6 times a day.

1. https://calculator.aws/#/addService ,2. https://s3.amazonaws.com/lambda-tools/pricing-calculator.html

Best Regards, Vikas

Here is the cost estimation for Instance Scheduler.