# reservation/EffectiveCost #level100 #cur #finops #curfield ## Source - Category: [[Reservation details]] - [AWS documentation](https://docs.aws.amazon.com/cur/latest/userguide/reservation-columns.html#r-E) - [[lineItem_LineItemType]]: DiscountedUsage ## Relevant notes - This line only applies to [[Reserved Instances]] - Connected with the topic of [[amortisation]] - calculated for the duration identify by [[lineItem_UsageStartDate]] and [[lineItem_UsageEndDate]] ## Notes - an amortised cost that includes upfront fees (if any) and discounted price - [[reservation_EffectiveCost]] = [[reservation_AmortizedUpfrontCostForUsage]] + [[reservation_RecurringFeeForUsage]]