Is there additional cost for turning always_on for Azure Function?

Question

We already have a premium app service plan in our enterprise. So, would there be additional costs for enabling always_on in Azure function? If so, would creating a timer trigger function (in PowerShell I think?) to disable always_on during off peak hours a better approach?

If the new timer trigger costs more than always_on, then leaving always_on enabled is the best way forward.

Thoughts?

Answer 1

Hi @dotnet_guy,

Enabling the "Always On" setting for your Azure Function app running on a Premium App Service plan does not incur additional costs beyond what you are already paying for the Premium plan itself. You are billed for the plan regardless of whether the "Always On" setting is enabled or not.Using a timer trigger function to disable "Always On" during off-peak hours may not necessarily save costs, as the Premium plan has a minimum monthly cost per active plan, regardless of whether the function is active or idle.

For further clarification, please refer to the following documentations:

• Azure Functions Premium plan
• Dedicated hosting plans for Azure Functions

I hope this helps resolve your issue. Feel free to reach out if you have further concerns.