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by throwaway2016a 684 days ago
> NAT GW is $0.045/h even if doing nothing, plus $0.045/GB, plus egress. IP is $0.005 without any extra costs other than the standard

That's only 10 servers. I sometimes forget they charge per GB too. That particular charge rarely affects me but if your private services need a lot of data that can certainly add up.

To expand on that, additionally, if you are running your own NAT you need to have one instance per AZ or you end up with cross-subnet transfer costs. So that's at least one cost that you save with NAT gateway (though moot if you run all your services in the public subnets)