Load Balancer priser

Azure Load Balancer is free of charge but not offered with Basic Virtual machines.

Public load balancing

Every Cloud Service gets a free public load balanced IP (VIP). If you want to load balance on multiple VIPs, you can get additional VIPs at a nominal charge as outlined here.

You can assign up to 5 additional IPs to your Load Balancer.

Internal load balancing

Load balancing between virtual machines that reside inside of a virtual network (Internal Load Balancing) is free of charge. Adding additional VIPs to the Internal Load Balancer is currently not supported.