diff --git a/EvoCalculator.Core/Controllers/v1/CalculationController.cs b/EvoCalculator.Core/Controllers/v1/CalculationController.cs
index d040c1d..8beacaa 100644
--- a/EvoCalculator.Core/Controllers/v1/CalculationController.cs
+++ b/EvoCalculator.Core/Controllers/v1/CalculationController.cs
@@ -185,7 +185,7 @@ namespace EvoCalculator.Core.Controllers.V1
                     ratExpensesColumn,
                     transExprensesColumn, tlmExpensesColumn, gpsExpensesColumn);
 
-                var npvWeightColumn = new NPVWeightColumn(preparedValues.Nmper + 1);
+                var npvWeightColumn = new NPVWeightColumn(maxColumnLength);
                 npvWeightColumn.ComputeValues(preparedValues, dateTempColumn);
 
                 var npvColumn = new NPVColumn(preparedValues.NmperDeprecation + 2, dateTempColumn);