diff --git a/homeassistant/components/smartthings/climate.py b/homeassistant/components/smartthings/climate.py
index f07c293939a..656a198f42b 100644
--- a/homeassistant/components/smartthings/climate.py
+++ b/homeassistant/components/smartthings/climate.py
@@ -173,6 +173,8 @@ class SmartThingsThermostat(SmartThingsEntity, ClimateEntity):
         flags = (
             ClimateEntityFeature.TARGET_TEMPERATURE
             | ClimateEntityFeature.TARGET_TEMPERATURE_RANGE
+            | ClimateEntityFeature.TURN_OFF
+            | ClimateEntityFeature.TURN_ON
         )
         if self._device.get_capability(
             Capability.thermostat_fan_mode, Capability.thermostat
@@ -353,7 +355,10 @@ class SmartThingsAirConditioner(SmartThingsEntity, ClimateEntity):
 
     def _determine_supported_features(self) -> ClimateEntityFeature:
         features = (
-            ClimateEntityFeature.TARGET_TEMPERATURE | ClimateEntityFeature.FAN_MODE
+            ClimateEntityFeature.TARGET_TEMPERATURE
+            | ClimateEntityFeature.FAN_MODE
+            | ClimateEntityFeature.TURN_OFF
+            | ClimateEntityFeature.TURN_ON
         )
         if self._device.get_capability(Capability.fan_oscillation_mode):
             features |= ClimateEntityFeature.SWING_MODE
diff --git a/tests/components/smartthings/test_climate.py b/tests/components/smartthings/test_climate.py
index ae6e5734e75..475a8f09e03 100644
--- a/tests/components/smartthings/test_climate.py
+++ b/tests/components/smartthings/test_climate.py
@@ -213,6 +213,8 @@ async def test_legacy_thermostat_entity_state(
         == ClimateEntityFeature.FAN_MODE
         | ClimateEntityFeature.TARGET_TEMPERATURE_RANGE
         | ClimateEntityFeature.TARGET_TEMPERATURE
+        | ClimateEntityFeature.TURN_OFF
+        | ClimateEntityFeature.TURN_ON
     )
     assert state.attributes[ATTR_HVAC_ACTION] == HVACAction.IDLE
     assert sorted(state.attributes[ATTR_HVAC_MODES]) == [
@@ -240,6 +242,8 @@ async def test_basic_thermostat_entity_state(
         state.attributes[ATTR_SUPPORTED_FEATURES]
         == ClimateEntityFeature.TARGET_TEMPERATURE_RANGE
         | ClimateEntityFeature.TARGET_TEMPERATURE
+        | ClimateEntityFeature.TURN_OFF
+        | ClimateEntityFeature.TURN_ON
     )
     assert ATTR_HVAC_ACTION not in state.attributes
     assert sorted(state.attributes[ATTR_HVAC_MODES]) == [
@@ -261,6 +265,8 @@ async def test_thermostat_entity_state(hass: HomeAssistant, thermostat) -> None:
         == ClimateEntityFeature.FAN_MODE
         | ClimateEntityFeature.TARGET_TEMPERATURE_RANGE
         | ClimateEntityFeature.TARGET_TEMPERATURE
+        | ClimateEntityFeature.TURN_OFF
+        | ClimateEntityFeature.TURN_ON
     )
     assert state.attributes[ATTR_HVAC_ACTION] == HVACAction.IDLE
     assert sorted(state.attributes[ATTR_HVAC_MODES]) == [
@@ -288,6 +294,8 @@ async def test_buggy_thermostat_entity_state(
         state.attributes[ATTR_SUPPORTED_FEATURES]
         == ClimateEntityFeature.TARGET_TEMPERATURE_RANGE
         | ClimateEntityFeature.TARGET_TEMPERATURE
+        | ClimateEntityFeature.TURN_OFF
+        | ClimateEntityFeature.TURN_ON
     )
     assert state.state is STATE_UNKNOWN
     assert state.attributes[ATTR_TEMPERATURE] is None