diff --git a/GameData/RP-1/MaintenanceSettings.cfg b/GameData/RP-1/MaintenanceSettings.cfg
index 6a2e2fd7b5e..ed345e3d3f8 100644
--- a/GameData/RP-1/MaintenanceSettings.cfg
+++ b/GameData/RP-1/MaintenanceSettings.cfg
@@ -9,9 +9,12 @@ MAINTENANCESETTINGS
 	salaryResearchers = 600
 	researchersToUnlockCreditSalaryMultiplier
 	{
-		key = 300 0.6 0 0
-		key = 600 0.35
-		key = 1600 0.2 0 0
+		150 = 0.6
+		300 = 0.5
+		600 = 0.35
+		1000 = 0.25
+		1600 = 0.2
+		9999999 = 0.15
 	}
 	nautYearlyUpkeepAdd = 10000
 	nautYearlyUpkeepBase = 2500
diff --git a/Source/Maintenance/MaintenanceSettings.cs b/Source/Maintenance/MaintenanceSettings.cs
index f41ec10f346..78dd66d10bc 100644
--- a/Source/Maintenance/MaintenanceSettings.cs
+++ b/Source/Maintenance/MaintenanceSettings.cs
@@ -1,4 +1,6 @@
-namespace RP0
+using RP0.DataTypes;
+
+namespace RP0
 {
     public class MaintenanceSettings
     {
@@ -15,7 +17,7 @@ public class MaintenanceSettings
         public int salaryResearchers = 1000;
 
         [Persistent]
-        public FloatCurve researchersToUnlockCreditSalaryMultiplier = new FloatCurve();
+        public PersistentSortedListValueTypes<int, double> researchersToUnlockCreditSalaryMultiplier = new PersistentSortedListValueTypes<int, double>();
 
         [Persistent]
         public double hangarCostForMaintenanceOffset = 240000d;
diff --git a/Source/UnlockCreditHandler.cs b/Source/UnlockCreditHandler.cs
index 23f03759d17..1d36f755ee5 100644
--- a/Source/UnlockCreditHandler.cs
+++ b/Source/UnlockCreditHandler.cs
@@ -15,9 +15,30 @@ public class UnlockCreditHandler : ScenarioModule
 
         public double TotalCredit => _totalCredit;
 
-        public double CreditForTime(double UT) => UT 
-            * MaintenanceHandler.Instance.ResearchSalaryPerDay * (1d / 86400d) 
-            * MaintenanceHandler.Settings.researchersToUnlockCreditSalaryMultiplier.Evaluate((float)MaintenanceHandler.Instance.Researchers);
+        public double CreditForTime(double UT)
+        {
+            double sum = 0d;
+            double mult = UT * MaintenanceHandler.Settings.salaryResearchers * (1d / (86400d * 365.25d));
+            
+            int res = KerbalConstructionTimeData.Instance.Researchers;
+            int totalCounted = 0;
+            
+            foreach (var kvp in MaintenanceHandler.Settings.researchersToUnlockCreditSalaryMultiplier)
+            {
+                if (totalCounted >= res)
+                    break;
+
+                int amountToCount = kvp.Key - totalCounted;
+                int remaining = res - totalCounted;
+                if (amountToCount > remaining)
+                    amountToCount = remaining;
+
+                sum += amountToCount * kvp.Value;
+                totalCounted += amountToCount;
+            }
+
+            return sum * mult;
+        }
 
         public double GetCreditAmount(string tech) => _totalCredit;
         public double GetCreditAmount(List<AvailablePart> partList) => _totalCredit;