Current month's total forecast != Forecasted month-end costs

Question

Every month we pay $400 - $500 for various AWS services. Today, however, my "Current month's total forecast" said USD 3,039.95. This was quite scary to see, however when I go to the cost explorer it tells me that my "Forecasted month-end costs" are $471.68, which is normal. As of yesterday, I have created one Lambda function and one DynamoDB table and when I look into my charges this far in the month, they are completely normal and expected. I have looked at my usage this month and see nothing out of the ordinary. What is causing my forecast to be so high? Did any AWS services change their pricing or billing structure as of this month?

Accepted Answer

If you see a high forecast early in the month, It may be because **some services** bill a larger amount at one time, around the first of the month.
Most services bill at a steady state and increase at the same rate over the entire month.

Current month's total forecast != Forecasted month-end costs

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