Application Load Balancer costs

Although the pricing for ALBs is ~$18/month (before accounting for traffic), keep in mind that the IPv4 addresses assigned to it will significantly increase the costs, which while not significant in production is a big addition to the costs of a test environment.

From Feb 1, 2024, AWS is charging $3.75 per month per IPv4 address being used (Lightsail addresses are starting to get extra costs from May).

If you want to keep a load balancer operating in your test environment, it's a good idea to modify its subnets to only use 2 subnets in the availability zone it is in (so that it only uses 2 IPv4 addresses instead of 3). The minimum cost is therefore around $25.50 per month for one ALB.