diff --git a/engine/cdrs.go b/engine/cdrs.go
index 90e5f68fc..463d5be1f 100644
--- a/engine/cdrs.go
+++ b/engine/cdrs.go
@@ -160,6 +160,24 @@ func (cdrS *CDRServer) rateCDR(cdr *CDRWithArgDispatcher) ([]*CDR, error) {
 				cdrClone.OriginID = smCost.OriginID
 				if cdr.Usage == 0 {
 					cdrClone.Usage = smCost.Usage
+				} else if smCost.CostDetails.GetUsage() != cdr.Usage {
+					if err = cdrS.refundEventCost(smCost.CostDetails,
+						cdrClone.RequestType, cdrClone.ToR); err != nil {
+						return nil, err
+					}
+					cdrClone.CostDetails = nil
+					if qryCC, err = cdrS.getCostFromRater(&CDRWithArgDispatcher{CDR: cdrClone}); err != nil {
+						return nil, err
+					} else {
+						smCost = &SMCost{
+							CGRID:       cdrClone.CGRID,
+							RunID:       cdrClone.RunID,
+							OriginHost:  cdrClone.OriginID,
+							CostSource:  utils.CDRs,
+							Usage:       cdrClone.Usage,
+							CostDetails: NewEventCostFromCallCost(qryCC, cdrClone.CGRID, cdrClone.RunID),
+						}
+					}
 				}
 				cdrClone.Cost = smCost.CostDetails.GetCost()
 				cdrClone.CostDetails = smCost.CostDetails