diff --git a/openmc/tallies.py b/openmc/tallies.py
index ab0bebc8d..7396635d0 100644
--- a/openmc/tallies.py
+++ b/openmc/tallies.py
@@ -3468,6 +3468,20 @@ class Tallies(cv.CheckedList):
                     # Continue iterating from the first loop
                     break
 
+    def remove_duplicate_filters(self):
+        """Search all tallies for any identical filters and set the IDs of
+        identical filters to the same value. This prevents a filter from being
+        written multiple times to the tallies.xml input file.
+
+        """
+
+        for tally1 in self:
+            for filter1 in tally1.filters:
+                for tally2 in self:
+                    for filter2 in tally2.filters:
+                        if filter1 == filter2:
+                            filter2.id = filter1.id
+
     def add_mesh(self, mesh):
         """Add a mesh to the file
 
@@ -3539,16 +3553,23 @@ class Tallies(cv.CheckedList):
         for d in derivs:
             root_element.append(d.to_xml_element())
 
-    def export_to_xml(self, path='tallies.xml'):
+    def export_to_xml(self, path='tallies.xml', reduce_filters=True):
         """Create a tallies.xml file that can be used for a simulation.
 
         Parameters
         ----------
         path : str
             Path to file to write. Defaults to 'tallies.xml'.
+        reduce_filters : bool
+            Indicates whether duplicate filters should be removed. This
+            prevents identical filters with different user IDs from being
+            written to the tallies.xml input file. Defaults to True.
 
         """
 
+        if reduce_filters:
+            self.remove_duplicate_filters()
+
         root_element = ET.Element("tallies")
         self._create_mesh_subelements(root_element)
         self._create_filter_subelements(root_element)