diff --git a/src/backend/InvenTree/build/api.py b/src/backend/InvenTree/build/api.py
index e94590e67f..f509b980b4 100644
--- a/src/backend/InvenTree/build/api.py
+++ b/src/backend/InvenTree/build/api.py
@@ -145,8 +145,8 @@ class BuildFilter(FilterSet):
     def filter_overdue(self, queryset, name, value):
         """Filter the queryset to either include or exclude orders which are overdue."""
         if str2bool(value):
-            return queryset.filter(Build.OVERDUE_FILTER)
-        return queryset.exclude(Build.OVERDUE_FILTER)
+            return queryset.filter(Build.get_overdue_filter())
+        return queryset.exclude(Build.get_overdue_filter())
 
     assigned_to_me = rest_filters.BooleanFilter(
         label=_('Assigned to me'), method='filter_assigned_to_me'
diff --git a/src/backend/InvenTree/build/models.py b/src/backend/InvenTree/build/models.py
index 1662088163..7222c95534 100644
--- a/src/backend/InvenTree/build/models.py
+++ b/src/backend/InvenTree/build/models.py
@@ -132,11 +132,14 @@ class Build(
         TRACKED = 'tracked'  # Tracked BOM items
         UNTRACKED = 'untracked'  # Untracked BOM items
 
-    OVERDUE_FILTER = (
-        Q(status__in=BuildStatusGroups.ACTIVE_CODES)
-        & ~Q(target_date=None)
-        & Q(target_date__lte=InvenTree.helpers.current_date())
-    )
+    @classmethod
+    def get_overdue_filter(cls):
+        """Filter for determining if a build order is overdue."""
+        return (
+            Q(status__in=BuildStatusGroups.ACTIVE_CODES)
+            & ~Q(target_date=None)
+            & Q(target_date__lte=InvenTree.helpers.current_date())
+        )
 
     # Global setting for specifying reference pattern
     REFERENCE_PATTERN_SETTING = 'BUILDORDER_REFERENCE_PATTERN'
@@ -465,7 +468,7 @@ class Build(
             bool: Is the build overdue
         """
         query = Build.objects.filter(pk=self.pk)
-        query = query.filter(Build.OVERDUE_FILTER)
+        query = query.filter(Build.get_overdue_filter())
 
         return query.exists()
 
diff --git a/src/backend/InvenTree/build/serializers.py b/src/backend/InvenTree/build/serializers.py
index db4fd7560b..390858bbeb 100644
--- a/src/backend/InvenTree/build/serializers.py
+++ b/src/backend/InvenTree/build/serializers.py
@@ -168,7 +168,8 @@ class BuildSerializer(
         queryset = queryset.annotate(
             overdue=Case(
                 When(
-                    Build.OVERDUE_FILTER, then=Value(True, output_field=BooleanField())
+                    Build.get_overdue_filter(),
+                    then=Value(True, output_field=BooleanField()),
                 ),
                 default=Value(False, output_field=BooleanField()),
             )
diff --git a/src/backend/InvenTree/order/models.py b/src/backend/InvenTree/order/models.py
index fdba3e9323..5b6cbbceb6 100644
--- a/src/backend/InvenTree/order/models.py
+++ b/src/backend/InvenTree/order/models.py
@@ -1873,12 +1873,14 @@ class PurchaseOrderLineItem(OrderLineItem):
 
         verbose_name = _('Purchase Order Line Item')
 
-    # Filter for determining if a particular PurchaseOrderLineItem is overdue
-    OVERDUE_FILTER = (
-        Q(received__lt=F('quantity'))
-        & ~Q(target_date=None)
-        & Q(target_date__lt=InvenTree.helpers.current_date())
-    )
+    @classmethod
+    def get_overdue_filter(cls):
+        """Filter for determining if a particular PurchaseOrderLineItem is overdue."""
+        return (
+            Q(received__lt=F('quantity'))
+            & ~Q(target_date=None)
+            & Q(target_date__lt=InvenTree.helpers.current_date())
+        )
 
     @staticmethod
     def get_api_url() -> str:
@@ -2077,12 +2079,14 @@ class SalesOrderLineItem(OrderLineItem):
 
         verbose_name = _('Sales Order Line Item')
 
-    # Filter for determining if a particular SalesOrderLineItem is overdue
-    OVERDUE_FILTER = (
-        Q(shipped__lt=F('quantity'))
-        & ~Q(target_date=None)
-        & Q(target_date__lt=InvenTree.helpers.current_date())
-    )
+    @classmethod
+    def get_overdue_filter(cls):
+        """Filter for determining if a particular SalesOrderLineItem is overdue."""
+        return (
+            Q(shipped__lt=F('quantity'))
+            & ~Q(target_date=None)
+            & Q(target_date__lt=InvenTree.helpers.current_date())
+        )
 
     @staticmethod
     def get_api_url():
diff --git a/src/backend/InvenTree/order/serializers.py b/src/backend/InvenTree/order/serializers.py
index 7ba6fb674f..c79382e429 100644
--- a/src/backend/InvenTree/order/serializers.py
+++ b/src/backend/InvenTree/order/serializers.py
@@ -594,7 +594,7 @@ class PurchaseOrderLineItemSerializer(
         queryset = queryset.annotate(
             overdue=Case(
                 When(
-                    order.models.PurchaseOrderLineItem.OVERDUE_FILTER,
+                    order.models.PurchaseOrderLineItem.get_overdue_filter(),
                     then=Value(True, output_field=BooleanField()),
                 ),
                 default=Value(False, output_field=BooleanField()),
@@ -1172,7 +1172,7 @@ class SalesOrderLineItemSerializer(
             overdue=Case(
                 When(
                     Q(order__status__in=SalesOrderStatusGroups.OPEN)
-                    & order.models.SalesOrderLineItem.OVERDUE_FILTER,
+                    & order.models.SalesOrderLineItem.get_overdue_filter(),
                     then=Value(True, output_field=BooleanField()),
                 ),
                 default=Value(False, output_field=BooleanField()),
diff --git a/src/backend/InvenTree/stock/api.py b/src/backend/InvenTree/stock/api.py
index 522bad77e2..2fbad3f937 100644
--- a/src/backend/InvenTree/stock/api.py
+++ b/src/backend/InvenTree/stock/api.py
@@ -685,8 +685,8 @@ class StockFilter(FilterSet):
             return queryset
 
         if str2bool(value):
-            return queryset.filter(StockItem.EXPIRED_FILTER)
-        return queryset.exclude(StockItem.EXPIRED_FILTER)
+            return queryset.filter(StockItem.get_expired_filter())
+        return queryset.exclude(StockItem.get_expired_filter())
 
     external = rest_filters.BooleanFilter(
         label=_('External Location'), method='filter_external'
diff --git a/src/backend/InvenTree/stock/models.py b/src/backend/InvenTree/stock/models.py
index b9f2c298a2..a3406adb41 100644
--- a/src/backend/InvenTree/stock/models.py
+++ b/src/backend/InvenTree/stock/models.py
@@ -521,12 +521,14 @@ class StockItem(
         status__in=StockStatusGroups.AVAILABLE_CODES,
     )
 
-    # A query filter which can be used to filter StockItem objects which have expired
-    EXPIRED_FILTER = (
-        IN_STOCK_FILTER
-        & ~Q(expiry_date=None)
-        & Q(expiry_date__lt=InvenTree.helpers.current_date())
-    )
+    @classmethod
+    def get_expired_filter(cls):
+        """A query filter which can be used to filter StockItem objects which have expired."""
+        return (
+            cls.IN_STOCK_FILTER
+            & ~Q(expiry_date=None)
+            & Q(expiry_date__lt=InvenTree.helpers.current_date())
+        )
 
     @classmethod
     def _create_serial_numbers(cls, serials: list, **kwargs) -> QuerySet:
diff --git a/src/backend/InvenTree/stock/serializers.py b/src/backend/InvenTree/stock/serializers.py
index 11ac344e1e..49913ecb75 100644
--- a/src/backend/InvenTree/stock/serializers.py
+++ b/src/backend/InvenTree/stock/serializers.py
@@ -516,7 +516,7 @@ class StockItemSerializer(
         queryset = queryset.annotate(
             expired=Case(
                 When(
-                    StockItem.EXPIRED_FILTER,
+                    StockItem.get_expired_filter(),
                     then=Value(True, output_field=BooleanField()),
                 ),
                 default=Value(False, output_field=BooleanField()),