diff --git a/openwisp_radius/api/serializers.py b/openwisp_radius/api/serializers.py
index b9b01165..ca018bb9 100644
--- a/openwisp_radius/api/serializers.py
+++ b/openwisp_radius/api/serializers.py
@@ -300,10 +300,11 @@ class Meta:
 class UserGroupCheckSerializer(serializers.ModelSerializer):
     result = serializers.SerializerMethodField()
     type = serializers.SerializerMethodField()
+    reset = serializers.SerializerMethodField()
 
     class Meta:
         model = RadiusGroupCheck
-        fields = ("attribute", "op", "value", "result", "type")
+        fields = ("attribute", "op", "value", "result", "type", "reset")
 
     def get_result(self, obj):
         try:
@@ -329,6 +330,19 @@ def get_type(self, obj):
         else:
             return counter.get_attribute_type()
 
+    def get_reset(self, obj):
+        try:
+            Counter = app_settings.CHECK_ATTRIBUTE_COUNTERS_MAP[obj.attribute]
+            counter = Counter(
+                user=self.context["user"],
+                group=self.context["group"],
+                group_check=obj,
+            )
+            _, end_time = counter.get_reset_timestamps()
+            return end_time
+        except (SkipCheck, ValueError, KeyError):
+            return None
+
 
 class UserRadiusUsageSerializer(serializers.Serializer):
     def to_representation(self, obj):
diff --git a/openwisp_radius/tests/test_api/test_api.py b/openwisp_radius/tests/test_api/test_api.py
index d0a6f3d5..1ca94d14 100644
--- a/openwisp_radius/tests/test_api/test_api.py
+++ b/openwisp_radius/tests/test_api/test_api.py
@@ -1073,6 +1073,7 @@ def test_user_group_check_serializer_counter_does_not_exist(self):
                 "result": None,
                 "type": None,
                 "value": "2000000000",
+                "reset": None,
             },
         )
 
@@ -1581,6 +1582,7 @@ def test_user_radius_usage_view(self):
                     "value": "10800",
                     "result": 0,
                     "type": "seconds",
+                    "reset": checks[0]["reset"],
                 },
             )
             self.assertDictEqual(
@@ -1591,6 +1593,7 @@ def test_user_radius_usage_view(self):
                     "value": "3000000000",
                     "result": 0,
                     "type": "bytes",
+                    "reset": checks[1]["reset"],
                 },
             )
 
@@ -1622,6 +1625,7 @@ def test_user_radius_usage_view(self):
                     "value": "10800",
                     "result": 261,
                     "type": "seconds",
+                    "reset": checks[0]["reset"],
                 },
             )
             self.assertDictEqual(
@@ -1632,6 +1636,7 @@ def test_user_radius_usage_view(self):
                     "value": "3000000000",
                     "result": 2000000000,
                     "type": "bytes",
+                    "reset": checks[1]["reset"],
                 },
             )
 
@@ -1660,6 +1665,7 @@ def test_user_radius_usage_view(self):
                     "value": "10800",
                     "result": 522,
                     "type": "seconds",
+                    "reset": checks[0]["reset"],
                 },
             )
             self.assertDictEqual(
@@ -1670,6 +1676,7 @@ def test_user_radius_usage_view(self):
                     "value": "3000000000",
                     "result": 3000000000,
                     "type": "bytes",
+                    "reset": checks[1]["reset"],
                 },
             )
 
@@ -1698,6 +1705,7 @@ def test_user_radius_usage_view(self):
                     "value": "10800",
                     "result": 783,
                     "type": "seconds",
+                    "reset": checks[0]["reset"],
                 },
             )
             self.assertDictEqual(
@@ -1708,6 +1716,7 @@ def test_user_radius_usage_view(self):
                     "value": "3000000000",
                     "result": 3000000000,
                     "type": "bytes",
+                    "reset": checks[1]["reset"],
                 },
             )
 
@@ -1734,6 +1743,7 @@ def test_user_group_check_serializer_counter_does_not_exist(self):
                 "result": None,
                 "type": None,
                 "value": "2000000000",
+                "reset": None,
             },
         )