diff --git a/homeassistant/scripts/benchmark/__init__.py b/homeassistant/scripts/benchmark/__init__.py
index b769d385a4f..c16269a2a8b 100644
--- a/homeassistant/scripts/benchmark/__init__.py
+++ b/homeassistant/scripts/benchmark/__init__.py
@@ -58,7 +58,7 @@ def benchmark[_CallableT: Callable](func: _CallableT) -> _CallableT:
 
 
 @benchmark
-async def fire_events(hass):
+async def fire_events(hass: core.HomeAssistant) -> float:
     """Fire a million events."""
     count = 0
     event_name = "benchmark_event"
@@ -85,7 +85,7 @@ async def fire_events(hass):
 
 
 @benchmark
-async def fire_events_with_filter(hass):
+async def fire_events_with_filter(hass: core.HomeAssistant) -> float:
     """Fire a million events with a filter that rejects them."""
     count = 0
     event_name = "benchmark_event"
@@ -117,7 +117,7 @@ async def fire_events_with_filter(hass):
 
 
 @benchmark
-async def state_changed_helper(hass):
+async def state_changed_helper(hass: core.HomeAssistant) -> float:
     """Run a million events through state changed helper with 1000 entities."""
     count = 0
     entity_id = "light.kitchen"
@@ -141,7 +141,7 @@ async def state_changed_helper(hass):
     }
 
     for _ in range(10**6):
-        hass.bus.async_fire(EVENT_STATE_CHANGED, event_data)
+        hass.bus.async_fire(EVENT_STATE_CHANGED, event_data)  # type: ignore[misc]
 
     start = timer()
 
@@ -151,7 +151,7 @@ async def state_changed_helper(hass):
 
 
 @benchmark
-async def state_changed_event_helper(hass):
+async def state_changed_event_helper(hass: core.HomeAssistant) -> float:
     """Run a million events through state changed event helper with 1000 entities."""
     count = 0
     entity_id = "light.kitchen"
@@ -174,7 +174,7 @@ async def state_changed_event_helper(hass):
     }
 
     for _ in range(events_to_fire):
-        hass.bus.async_fire(EVENT_STATE_CHANGED, event_data)
+        hass.bus.async_fire(EVENT_STATE_CHANGED, event_data)  # type: ignore[misc]
 
     start = timer()
 
@@ -186,7 +186,7 @@ async def state_changed_event_helper(hass):
 
 
 @benchmark
-async def state_changed_event_filter_helper(hass):
+async def state_changed_event_filter_helper(hass: core.HomeAssistant) -> float:
     """Run a million events through state changed event helper.
 
     With 1000 entities that all get filtered.
@@ -212,7 +212,7 @@ async def state_changed_event_filter_helper(hass):
     }
 
     for _ in range(events_to_fire):
-        hass.bus.async_fire(EVENT_STATE_CHANGED, event_data)
+        hass.bus.async_fire(EVENT_STATE_CHANGED, event_data)  # type: ignore[misc]
 
     start = timer()
 
@@ -224,7 +224,7 @@ async def state_changed_event_filter_helper(hass):
 
 
 @benchmark
-async def filtering_entity_id(hass):
+async def filtering_entity_id(hass: core.HomeAssistant) -> float:
     """Run a 100k state changes through entity filter."""
     config = {
         "include": {
@@ -289,7 +289,7 @@ async def filtering_entity_id(hass):
 
 
 @benchmark
-async def valid_entity_id(hass):
+async def valid_entity_id(hass: core.HomeAssistant) -> float:
     """Run valid entity ID a million times."""
     start = timer()
     for _ in range(10**6):
@@ -298,7 +298,7 @@ async def valid_entity_id(hass):
 
 
 @benchmark
-async def json_serialize_states(hass):
+async def json_serialize_states(hass: core.HomeAssistant) -> float:
     """Serialize million states with websocket default encoder."""
     states = [
         core.State("light.kitchen", "on", {"friendly_name": "Kitchen Lights"})