I don't know why every single person here insists on budget based limits. What you want is resource based limits with throttling and a calculator that takes you

I don't know why every single person here insists on budget based limits. What you want is resource based limits with throttling and a calculator that takes your resource limits to determine the averaged monthly bill and a traffic spike bill. Then the goal would be to set the resource limits to something you are happy with. Yes, this is a pain in the ass to set up and AWS will probably never implement this, but it is the correct solution.