When will you incur costs with an Elastic IP address (EIP)?
When an EIP is allocated.
When it is allocated and associated with a running instance.
When it is allocated and associated with a stopped instance.
Costs are incurred regardless of whether the EIP is associated with a running instance.
If you no longer need an EIP, we recommend that you release it (the address must not be associated with an
instance). You incur charges for any EIP that’s allocated for use with EC2-Classic but not associated with an