diff --git a/ReportImp/AsbRheinErftDuerenSBD/AsbRheinErftDuerenSBD.csproj b/ReportImp/AsbRheinErftDuerenSBD/AsbRheinErftDuerenSBD.csproj
index 7c07a5d91..b2aab6888 100644
--- a/ReportImp/AsbRheinErftDuerenSBD/AsbRheinErftDuerenSBD.csproj
+++ b/ReportImp/AsbRheinErftDuerenSBD/AsbRheinErftDuerenSBD.csproj
@@ -74,7 +74,7 @@
     <Compile Include="Invoicing\CustomInvoiceCreation.cs" />
     <Compile Include="Invoicing\CustomInvoiceFactory.cs" />
     <Compile Include="Invoicing\CustomInvoiceNumberGenerator.cs" />
-    <Compile Include="Invoicing\ChristophorusPoolInvoiceCreation.cs" />
+    <Compile Include="Invoicing\PoolInvoiceCreation.cs" />
     <Compile Include="LeistungsnachweisSbd.cs">
       <SubType>Component</SubType>
     </Compile>
diff --git a/ReportImp/AsbRheinErftDuerenSBD/Invoicing/CustomInvoiceFactory.cs b/ReportImp/AsbRheinErftDuerenSBD/Invoicing/CustomInvoiceFactory.cs
index 48e3286c0..54a5ccdc3 100644
--- a/ReportImp/AsbRheinErftDuerenSBD/Invoicing/CustomInvoiceFactory.cs
+++ b/ReportImp/AsbRheinErftDuerenSBD/Invoicing/CustomInvoiceFactory.cs
@@ -24,7 +24,7 @@ namespace AsbRheinErftDuerenSBD.Invoicing
 						return new CustomInvoiceCreationAldenhoven();
 					}
 					else if (sc.CostBearer.Contains("Sozialamt Düren Pools"))
-						return new ChristophorusPoolInvoiceCreation();
+						return new PoolInvoiceCreation();
 					//else if (sc.CostBearer.Contains("Sozialamt Kreis Düren"))
 					//{
 					//	return new CustomInvoiceCreationAldenhoven();
diff --git a/ReportImp/AsbRheinErftDuerenSBD/Invoicing/ChristophorusPoolInvoiceCreation.cs b/ReportImp/AsbRheinErftDuerenSBD/Invoicing/PoolInvoiceCreation.cs
similarity index 86%
rename from ReportImp/AsbRheinErftDuerenSBD/Invoicing/ChristophorusPoolInvoiceCreation.cs
rename to ReportImp/AsbRheinErftDuerenSBD/Invoicing/PoolInvoiceCreation.cs
index 78d87c47b..352af478e 100644
--- a/ReportImp/AsbRheinErftDuerenSBD/Invoicing/ChristophorusPoolInvoiceCreation.cs
+++ b/ReportImp/AsbRheinErftDuerenSBD/Invoicing/PoolInvoiceCreation.cs
@@ -10,7 +10,7 @@ using System.Linq;
 
 namespace AsbRheinErftDuerenSBD.Invoicing
 {
-    public class ChristophorusPoolInvoiceCreation : InvoiceCreation
+    public class PoolInvoiceCreation : InvoiceCreation
     {
         public override void SetInvoiceId(ServiceInvoice invoice)
         {
@@ -42,11 +42,11 @@ namespace AsbRheinErftDuerenSBD.Invoicing
             if (team == null)
                 return;
 
-            var anzFK = 0;
+            decimal anzFK = 0;
             var preiseFK = DAOFactory.GenericDAO.GetAllActive<ServiceCategory>().FirstOrDefault(sc => sc.Name == "Pool - Fachkraft (FK)").CostRatePeriods.ToList();
-            var anzHK = 0;
+            decimal anzHK = 0;
             var preiseHK = DAOFactory.GenericDAO.GetAllActive<ServiceCategory>().FirstOrDefault(sc => sc.Name == "Pool-Nichtfachkraft (HK)").CostRatePeriods.ToList();
-            var anzHKTeilzeit = 0;
+            decimal anzHKTeilzeit = 0;
             var preiseHKTeilzeit = DAOFactory.GenericDAO.GetAllActive<ServiceCategory>().FirstOrDefault(sc => sc.Name == "Pool-Nichtfachkraft(HK)").CostRatePeriods.ToList();
 
             var employee = MapperFactory.EmployeeDC_Employee.MapToNewDCs(DAOFactory.GenericDAO.GetActiveByIDs<Employee>(team.Member.Select(m => m.EmployeeOid).ToList()));
@@ -55,16 +55,26 @@ namespace AsbRheinErftDuerenSBD.Invoicing
 
             foreach (var e in employee)
             {
-                if (allServiceRecords.Any(s => s.EmployeeOid == e.EmployeeOid && s.ServiceDescription.ServiceCategory.Name.ToLower().Contains("poolpauschale")))
+                var sr = allServiceRecords.FirstOrDefault(s => s.EmployeeOid == e.EmployeeOid && s.ServiceDescription.ServiceCategory.Name.ToLower().Contains("poolpauschale"));
+                if (sr != null)
                 {
                     serviceInvoicePeriod.Notice += e.FirstName + " " + e.LastName + ", ";
+                    // Wenn Mitarbeiter erst Mitte oder 3/4 des Monats angefangen hat, wird der Anteil um 50 bzw 75% verringert
 
                     if (e.LastName.Contains("Bugla") && e.FirstName.Contains("Frank")) // Hier Ausnahme, also Teilzeit-MA, einfügen
-                        anzHKTeilzeit++;
+                    {
+                        anzHKTeilzeit += VerringerungUeberpruefen(sr);
+                    }
                     else if (e.IsQualified.HasValue && e.IsQualified.Value)
-                        anzFK++;
+                    {
+                        anzFK += VerringerungUeberpruefen(sr);
+
+                    }
                     else if (!e.IsQualified.HasValue || e.IsQualified.HasValue && !e.IsQualified.Value)
-                        anzHK++;
+                    {
+                        anzHK += VerringerungUeberpruefen(sr);
+
+                    }
                 }
             }
             if (!serviceInvoicePeriod.Notice.IsNullOrEmpty())
@@ -126,6 +136,16 @@ namespace AsbRheinErftDuerenSBD.Invoicing
             }
         }
 
+        private decimal VerringerungUeberpruefen(ServiceRecord sr)
+        {
+            if (sr.ServiceDescription.Name.Contains("50%"))
+                return 0.5m;
+            else if (sr.ServiceDescription.Name.Contains("25%"))
+                return 0.25m;
+            else
+                return 1m;
+        }
+
         private static decimal GetPreis(DateTime datum, List<CostRatePeriod> preise)
         {
             var preis = 0.0m;