diff --git a/ReportImp/Humanitas/Humanitas.csproj b/ReportImp/Humanitas/Humanitas.csproj
index d80aec8b3..bb3d0eaba 100644
--- a/ReportImp/Humanitas/Humanitas.csproj
+++ b/ReportImp/Humanitas/Humanitas.csproj
@@ -90,6 +90,7 @@
     <Compile Include="ServicesOverviewReport.Designer.cs">
       <DependentUpon>ServicesOverviewReport.cs</DependentUpon>
     </Compile>
+    <Compile Include="Service\CustomServiceRecordValidator.cs" />
     <Compile Include="Service\CustomVacationService.cs" />
     <Compile Include="SettlementReport.cs">
       <SubType>Component</SubType>
diff --git a/ReportImp/Humanitas/Service/CustomServiceRecordValidator.cs b/ReportImp/Humanitas/Service/CustomServiceRecordValidator.cs
new file mode 100644
index 000000000..d7ec57641
--- /dev/null
+++ b/ReportImp/Humanitas/Service/CustomServiceRecordValidator.cs
@@ -0,0 +1,33 @@
+using BeWo.Service.Plugins;
+using BS.Shared.DataContracts;
+using BS.Shared.Extensions;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Humanitas.Service
+{
+    public class CustomServiceRecordValidator : ServiceRecordValidator
+    {
+        public override List<ServiceRecordValidationResultDC> ValidateServiceRecord(ServiceRecordDC newServiceRecord, SupportConceptStatisticsDC statisticsXX, int maxDaysEditServiceRecordsAllowed, IList<long> employeeOids, IList<long> cb2scOids)
+        {
+            var list =  base.ValidateServiceRecord(newServiceRecord, statisticsXX, maxDaysEditServiceRecordsAllowed, employeeOids, cb2scOids);
+
+            if (newServiceRecord.ServiceDescription.Category.IsBillable && (newServiceRecord.Start == null && newServiceRecord.End == null || 
+                newServiceRecord.Start.HasValue && newServiceRecord.Start.Value.Second == 1 &&
+                newServiceRecord.End.HasValue && newServiceRecord.End.Value.Second == 1))
+            {
+                list.Add(new ServiceRecordValidationResultDC()
+                {
+                    Allow = false,
+                    ResultType = BS.Shared.ServiceRecordValidationResult.Custom,
+                    Message = "Sie können den Eintrag nicht speichern, ohne eine Start- und Endzeit einzugeben."
+                });
+            }
+
+            return list;
+        }
+    }
+}