$0.005 per Elastic IP address not attached to a running instance per hour (prorated)?

Question

Amazon Web Services

I created an elastic ip, tied it to instance, but write-offs still occur, why?
Is this related to the fact that instance does not work?

Answer 1

Yes.

To ensure efficient use of Elastic IP addresses, we impose a small hourly charge if an Elastic IP address is not associated with a running instance, or if it is associated with a stopped instance or an unattached network interface. While your instance is running, you are not charged for one Elastic IP address associated with the instance, but you are charged for any additional Elastic IP addresses associated with the instance.