diff --git a/homeassistant/components/mqtt/binary_sensor.py b/homeassistant/components/mqtt/binary_sensor.py
index 7608fc5816c..9143b804c60 100644
--- a/homeassistant/components/mqtt/binary_sensor.py
+++ b/homeassistant/components/mqtt/binary_sensor.py
@@ -42,6 +42,7 @@ from .mixins import (
     MqttAvailability,
     MqttEntity,
     async_setup_entity_entry_helper,
+    validate_sensor_entity_category,
     write_state_on_attr_change,
 )
 from .models import MqttValueTemplate, ReceiveMessage
@@ -68,10 +69,12 @@ _PLATFORM_SCHEMA_BASE = MQTT_RO_SCHEMA.extend(
 ).extend(MQTT_ENTITY_COMMON_SCHEMA.schema)
 
 DISCOVERY_SCHEMA = vol.All(
+    validate_sensor_entity_category(binary_sensor.DOMAIN, discovery=True),
     _PLATFORM_SCHEMA_BASE.extend({}, extra=vol.REMOVE_EXTRA),
 )
 
 PLATFORM_SCHEMA_MODERN = vol.All(
+    validate_sensor_entity_category(binary_sensor.DOMAIN, discovery=False),
     _PLATFORM_SCHEMA_BASE,
 )
 
diff --git a/tests/components/mqtt/test_init.py b/tests/components/mqtt/test_init.py
index 52c35d380f9..5bb86662322 100644
--- a/tests/components/mqtt/test_init.py
+++ b/tests/components/mqtt/test_init.py
@@ -2172,6 +2172,18 @@ async def test_setup_manual_mqtt_with_invalid_config(
             },
             "sensor.test",
         ),
+        (
+            {
+                mqtt.DOMAIN: {
+                    "binary_sensor": {
+                        "name": "test",
+                        "state_topic": "test-topic",
+                        "entity_category": "config",
+                    }
+                }
+            },
+            "binary_sensor.test",
+        ),
     ],
 )
 @patch(
@@ -2195,6 +2207,14 @@ async def test_setup_manual_mqtt_with_invalid_entity_category(
 @pytest.mark.parametrize(
     ("config", "entity_id"),
     [
+        (
+            {
+                "name": "test",
+                "state_topic": "test-topic",
+                "entity_category": "config",
+            },
+            "binary_sensor.test",
+        ),
         (
             {
                 "name": "test",