diff --git a/go/vt/vtgate/planbuilder/operators/sharded_routing.go b/go/vt/vtgate/planbuilder/operators/sharded_routing.go
index f539432c5e0..805e03c8f56 100644
--- a/go/vt/vtgate/planbuilder/operators/sharded_routing.go
+++ b/go/vt/vtgate/planbuilder/operators/sharded_routing.go
@@ -327,7 +327,7 @@ func (tr *ShardedRouting) Cost() int {
 	switch tr.RouteOpCode {
 	case engine.EqualUnique:
 		return 1
-	case engine.Equal:
+	case engine.Equal, engine.SubShard:
 		return 5
 	case engine.IN:
 		return 10
diff --git a/go/vt/vtgate/planbuilder/testdata/from_cases.json b/go/vt/vtgate/planbuilder/testdata/from_cases.json
index c406ac98e82..c776443e490 100644
--- a/go/vt/vtgate/planbuilder/testdata/from_cases.json
+++ b/go/vt/vtgate/planbuilder/testdata/from_cases.json
@@ -6448,5 +6448,90 @@
         "zlookup_unique.t1"
       ]
     }
+  },
+  {
+    "comment": "join query using table with muticolumn vindex",
+    "query": "select 1 from multicol_tbl m1 join multicol_tbl m2 on m1.cola = m2.cola",
+    "v3-plan": {
+      "QueryType": "SELECT",
+      "Original": "select 1 from multicol_tbl m1 join multicol_tbl m2 on m1.cola = m2.cola",
+      "Instructions": {
+        "OperatorType": "Join",
+        "Variant": "Join",
+        "JoinColumnIndexes": "L:0",
+        "JoinVars": {
+          "m1_cola": 1
+        },
+        "TableName": "multicol_tbl_multicol_tbl",
+        "Inputs": [
+          {
+            "OperatorType": "Route",
+            "Variant": "Scatter",
+            "Keyspace": {
+              "Name": "user",
+              "Sharded": true
+            },
+            "FieldQuery": "select 1, m1.cola from multicol_tbl as m1 where 1 != 1",
+            "Query": "select 1, m1.cola from multicol_tbl as m1",
+            "Table": "multicol_tbl"
+          },
+          {
+            "OperatorType": "Route",
+            "Variant": "Scatter",
+            "Keyspace": {
+              "Name": "user",
+              "Sharded": true
+            },
+            "FieldQuery": "select 1 from multicol_tbl as m2 where 1 != 1",
+            "Query": "select 1 from multicol_tbl as m2 where m2.cola = :m1_cola",
+            "Table": "multicol_tbl"
+          }
+        ]
+      }
+    },
+    "gen4-plan": {
+      "QueryType": "SELECT",
+      "Original": "select 1 from multicol_tbl m1 join multicol_tbl m2 on m1.cola = m2.cola",
+      "Instructions": {
+        "OperatorType": "Join",
+        "Variant": "Join",
+        "JoinColumnIndexes": "L:0",
+        "JoinVars": {
+          "m1_cola": 1
+        },
+        "TableName": "multicol_tbl_multicol_tbl",
+        "Inputs": [
+          {
+            "OperatorType": "Route",
+            "Variant": "Scatter",
+            "Keyspace": {
+              "Name": "user",
+              "Sharded": true
+            },
+            "FieldQuery": "select 1, m1.cola from multicol_tbl as m1 where 1 != 1",
+            "Query": "select 1, m1.cola from multicol_tbl as m1",
+            "Table": "multicol_tbl"
+          },
+          {
+            "OperatorType": "Route",
+            "Variant": "SubShard",
+            "Keyspace": {
+              "Name": "user",
+              "Sharded": true
+            },
+            "FieldQuery": "select 1 from multicol_tbl as m2 where 1 != 1",
+            "Query": "select 1 from multicol_tbl as m2 where m2.cola = :m1_cola",
+            "Table": "multicol_tbl",
+            "Values": [
+              ":m1_cola"
+            ],
+            "Vindex": "multicolIdx"
+          }
+        ]
+      },
+      "TablesUsed": [
+        "user.multicol_tbl"
+      ]
+    }
   }
 ]