diff --git a/Source/RP0/SpaceCenter/Projects/LCConstructionProject.cs b/Source/RP0/SpaceCenter/Projects/LCConstructionProject.cs
index 7ee97a49304..0f7445ce130 100644
--- a/Source/RP0/SpaceCenter/Projects/LCConstructionProject.cs
+++ b/Source/RP0/SpaceCenter/Projects/LCConstructionProject.cs
@@ -125,7 +125,6 @@ private void ReassignEngineers(LaunchComplex lc)
             if (engToAssign > 0)
             {
                 KCTUtilities.ChangeEngineers(lc, engToAssign);
-                lc.RecalculateBuildRates();
             }
         }
     }
diff --git a/Source/RP0/UI/KCT/GUI_Personnel.cs b/Source/RP0/UI/KCT/GUI_Personnel.cs
index a0222ce606b..33ad28fe63c 100644
--- a/Source/RP0/UI/KCT/GUI_Personnel.cs
+++ b/Source/RP0/UI/KCT/GUI_Personnel.cs
@@ -123,9 +123,10 @@ private static void RenderEngineersSection(bool isCostCacheInvalid)
             string assignStr = GetAssignText(true, currentLC, out int assignAmt);
             string unassignStr = GetAssignText(false, currentLC, out int unassignAmt);
 
-            bool recalc = false;
             ProjectType type = currentLC.LCType == LaunchComplexType.Pad ? ProjectType.VAB : ProjectType.SPH;
-            if (GUILayout.Button(unassignStr, GUILayout.ExpandWidth(false)) && unassignAmt > 0) { KCTUtilities.ChangeEngineers(currentLC, -unassignAmt); recalc = true; }
+            if (GUILayout.Button(unassignStr, GUILayout.ExpandWidth(false)) && unassignAmt > 0)
+                KCTUtilities.ChangeEngineers(currentLC, -unassignAmt);
+
             if (Event.current.type == EventType.Repaint)
             {
                 if (GUILayoutUtility.GetLastRect().Contains(Event.current.mousePosition))
@@ -136,7 +137,9 @@ private static void RenderEngineersSection(bool isCostCacheInvalid)
 
             GUILayout.Label($"  {currentLC.Engineers:N0}  ", GetLabelCenterAlignStyle(), GUILayout.ExpandWidth(false));
 
-            if (GUILayout.Button(assignStr, GUILayout.ExpandWidth(false)) && assignAmt > 0) { KCTUtilities.ChangeEngineers(currentLC, assignAmt); recalc = true; }
+            if (GUILayout.Button(assignStr, GUILayout.ExpandWidth(false)) && assignAmt > 0)
+                KCTUtilities.ChangeEngineers(currentLC, assignAmt);
+
             if (Event.current.type == EventType.Repaint)
             {
                 if (GUILayoutUtility.GetLastRect().Contains(Event.current.mousePosition))
@@ -148,12 +151,6 @@ private static void RenderEngineersSection(bool isCostCacheInvalid)
             GUILayout.Label($"Max: {currentLC.MaxEngineers:N0}", GetLabelRightAlignStyle());
             GUILayout.EndHorizontal();
 
-            if (recalc)
-            {
-                currentLC.RecalculateBuildRates();
-                currentLC.KSC.RecalculateBuildRates(false);
-            }
-
             int assignDelta = 0;
             if (_currentPersonnelHover == PersonnelButtonHover.Assign)
                 assignDelta = assignAmt;
diff --git a/Source/RP0/Utilities/KCTUtilities.cs b/Source/RP0/Utilities/KCTUtilities.cs
index e88d2d64f3c..1d60c6a7888 100644
--- a/Source/RP0/Utilities/KCTUtilities.cs
+++ b/Source/RP0/Utilities/KCTUtilities.cs
@@ -1345,7 +1345,6 @@ public static void HireStaff(bool isResearch, int workerAmount, LaunchComplex lc
                 ChangeEngineers(ksc, workerAmount);
                 if (lc != null)
                     ChangeEngineers(lc, workerAmount);
-                ksc.RecalculateBuildRates(false);
             }
             SpaceCenterManagement.Instance.Applicants = Math.Max(0, SpaceCenterManagement.Instance.Applicants - workerAmount);
             if (SpaceCenterManagement.Instance.Applicants == 0)
@@ -1357,6 +1356,7 @@ public static void ChangeEngineers(LaunchComplex currentLC, int delta)
             currentLC.Engineers += delta;
             SCMEvents.OnPersonnelChange.Fire();
             MaintenanceHandler.Instance.ScheduleMaintenanceUpdate();
+            currentLC.RecalculateBuildRates();
             KCT_GUI.BuildRateForDisplay = null;
         }