diff --git a/src/backend/InvenTree/part/models.py b/src/backend/InvenTree/part/models.py
index dd5e418ef4de..eda1d17fd9a6 100644
--- a/src/backend/InvenTree/part/models.py
+++ b/src/backend/InvenTree/part/models.py
@@ -2838,6 +2838,9 @@ def update_bom_cost(self, save=True):
             for sub_part in bom_item.get_valid_parts_for_allocation():
                 # Check each part which *could* be used
 
+                if sub_part != bom_item.sub_part and not sub_part.active:
+                    continue
+
                 sub_part_pricing = sub_part.pricing
 
                 sub_part_min = self.convert(sub_part_pricing.overall_min)