diff --git a/Service/Invoicing/InvoiceCreation.cs b/Service/Invoicing/InvoiceCreation.cs
index d43956144..d7ef098df 100644
--- a/Service/Invoicing/InvoiceCreation.cs
+++ b/Service/Invoicing/InvoiceCreation.cs
@@ -612,6 +612,11 @@ namespace BeWo.Service.Invoicing
                             ii.AmountTotal = ii.AmountPerUnit.Value*ii.UnitCount;
                             ii.GrossAmountTotal = ii.AmountTotal;
                         }
+                        if (ii.RateFactor.HasValue)
+                        {
+                            ii.AmountTotal *= (ii.RateFactor + 100) / 100;
+                            ii.GrossAmountTotal *= (ii.RateFactor + 100) / 100;
+                        }
                         totalHours = sip.ApprovedHours.Value;
                     }
                     else