The flat hourly fee plus LCU usage that makes an ALB bill move.
An ALB charges to exist and then on whichever capacity dimension peaks. Consolidate services behind one balancer. For the traffic it fronts, compare the API gateway cost calculator.
Free load balancer cost calculator — hourly charge and LCU usage to your monthly ALB/NLB bill.
A Load Balancer Capacity Unit bundles four dimensions — new connections/sec, active connections, processed bytes, and rule evaluations. You are billed on whichever dimension is highest each hour, so one spiky dimension (say lots of new short-lived connections) can dominate your cost.
Consolidate services behind a single ALB using host- and path-based routing instead of one balancer per service, reuse connections (keep-alive) to cut new-connection LCUs, and remove idle load balancers — they bill the hourly fee even with zero traffic.
Cost at different volumes:
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