diff --git a/homeassistant/components/html5/issue.py b/homeassistant/components/html5/issue.py
index 66c11f5c7421..37cb84fbff7f 100644
--- a/homeassistant/components/html5/issue.py
+++ b/homeassistant/components/html5/issue.py
@@ -52,3 +52,33 @@ def deprecated_dismiss_action_call(hass: HomeAssistant) -> None:
             "new_action": "html5.dismiss_message",
         },
     )
+
+
+@callback
+def deprecated_event_bus(hass: HomeAssistant, event: str) -> None:
+    """Raise a deprecation issue for listeners on the event bus."""
+
+    if listeners := hass.bus.async_listeners().get(event):
+        async_create_issue(
+            hass,
+            DOMAIN,
+            f"deprecated_event_bus_{event}",
+            breaks_in_ha_version="2027.2.0",
+            is_fixable=False,
+            severity=IssueSeverity.WARNING,
+            translation_key="deprecated_event_bus",
+            translation_placeholders={
+                "event": event,
+                "listeners": str(listeners),
+                "example_yaml": """```yaml
+triggers:
+  - trigger: event.received
+    target:
+      entity_id: event.my_device
+    options:
+      event_type:
+        - received
+```
+""",
+            },
+        )
diff --git a/homeassistant/components/html5/notify.py b/homeassistant/components/html5/notify.py
index 00e5762b3ddc..1e6c1b743035 100644
--- a/homeassistant/components/html5/notify.py
+++ b/homeassistant/components/html5/notify.py
@@ -60,7 +60,11 @@ from .const import (
     SERVICE_DISMISS,
 )
 from .entity import HTML5Entity, Registration
-from .issue import deprecated_dismiss_action_call, deprecated_notify_action_call
+from .issue import (
+    deprecated_dismiss_action_call,
+    deprecated_event_bus,
+    deprecated_notify_action_call,
+)
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -409,6 +413,9 @@ class HTML5PushCallbackView(HomeAssistantView):
             event_payload[ATTR_TYPE],
             event_payload,
         )
+
+        deprecated_event_bus(hass, event_name)
+
         return self.json({"status": "ok", "event": event_payload[ATTR_TYPE]})
 
 
diff --git a/homeassistant/components/html5/strings.json b/homeassistant/components/html5/strings.json
index 3dea89e6ead2..1bc8941c65e6 100644
--- a/homeassistant/components/html5/strings.json
+++ b/homeassistant/components/html5/strings.json
@@ -55,6 +55,10 @@
       "description": "The action `{action}` is deprecated and will be removed in a future release.\n\nPlease update your automations and scripts to use the notify entities with the `{new_action}` action instead.",
       "title": "[%key:component::html5::issues::deprecated_notify_action::title%]"
     },
+    "deprecated_event_bus": {
+      "description": "Detected **{listeners}** listener(s) for the event `{event}`.\n\nThe HTML5 Push Notifications integration firing events on the event bus is deprecated and this functionality will be removed in a future release.\n\nPlease update your automations and scripts to use the event entities instead.\n\n## Example automation:\n\n{example_yaml}",
+      "title": "Detected use of deprecated event {event}"
+    },
     "deprecated_notify_action": {
       "description": "The action `{action}` is deprecated and will be removed in a future release.\n\nPlease update your automations and scripts to use the notify entities with the `{new_action_1}` or `{new_action_2}` actions instead.",
       "title": "Detected use of deprecated action {action}"
diff --git a/tests/components/html5/test_event.py b/tests/components/html5/test_event.py
index cd4be641f355..25e783df5e6b 100644
--- a/tests/components/html5/test_event.py
+++ b/tests/components/html5/test_event.py
@@ -9,12 +9,13 @@ from aiohttp.hdrs import AUTHORIZATION
 import pytest
 from syrupy.assertion import SnapshotAssertion
 
+from homeassistant.components.html5.const import DOMAIN
 from homeassistant.components.html5.notify import ATTR_ACTION, ATTR_TAG, ATTR_TYPE
 from homeassistant.components.notify import ATTR_DATA, ATTR_TARGET
 from homeassistant.config_entries import ConfigEntryState
 from homeassistant.const import STATE_UNKNOWN, Platform
 from homeassistant.core import HomeAssistant
-from homeassistant.helpers import entity_registry as er
+from homeassistant.helpers import entity_registry as er, issue_registry as ir
 from homeassistant.setup import async_setup_component
 
 from .test_notify import SUBSCRIPTION_1
@@ -118,3 +119,82 @@ async def test_events(
     assert state.attributes.get("action") == event_payload.get(ATTR_ACTION)
     assert state.attributes.get("tag") == event_payload[ATTR_TAG]
     assert state.attributes.get("customKey") == event_payload[ATTR_DATA]["customKey"]
+
+
+@pytest.mark.parametrize("event_type", ["clicked", "received", "closed"])
+@pytest.mark.usefixtures("mock_wp", "mock_jwt", "mock_vapid", "mock_uuid")
+async def test_deprecation_event_bus(
+    hass: HomeAssistant,
+    config_entry: MockConfigEntry,
+    load_config: MagicMock,
+    issue_registry: ir.IssueRegistry,
+    hass_client: ClientSessionGenerator,
+    event_type: str,
+) -> None:
+    """Test deprecation of events on the event bus."""
+    load_config.return_value = {"device": SUBSCRIPTION_1}
+    await async_setup_component(hass, "http", {})
+
+    config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert config_entry.state is ConfigEntryState.LOADED
+
+    config_entry.async_on_unload(
+        hass.bus.async_listen(f"html5_notification.{event_type}", lambda _: None)
+    )
+    client = await hass_client()
+
+    resp = await client.post(
+        "/api/notify.html5/callback",
+        json={"type": event_type, "tag": "12345", "target": "device"},
+        headers={AUTHORIZATION: "Bearer JWT"},
+    )
+
+    assert resp.status == HTTPStatus.OK
+    body = await resp.json()
+    assert body == {"event": event_type, "status": "ok"}
+
+    assert issue_registry.async_get_issue(
+        domain=DOMAIN,
+        issue_id=f"deprecated_event_bus_html5_notification.{event_type}",
+    )
+
+
+@pytest.mark.parametrize("event_type", ["clicked", "received", "closed"])
+@pytest.mark.usefixtures("mock_wp", "mock_jwt", "mock_vapid", "mock_uuid")
+async def test_deprecation_event_bus_no_listeners(
+    hass: HomeAssistant,
+    config_entry: MockConfigEntry,
+    load_config: MagicMock,
+    issue_registry: ir.IssueRegistry,
+    hass_client: ClientSessionGenerator,
+    event_type: str,
+) -> None:
+    """Test no issue is created when there are no listeners."""
+    load_config.return_value = {"device": SUBSCRIPTION_1}
+    await async_setup_component(hass, "http", {})
+
+    config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(config_entry.entry_id)
+    await hass.async_block_till_done()
+
+    assert config_entry.state is ConfigEntryState.LOADED
+
+    client = await hass_client()
+
+    resp = await client.post(
+        "/api/notify.html5/callback",
+        json={"type": event_type, "tag": "12345", "target": "device"},
+        headers={AUTHORIZATION: "Bearer JWT"},
+    )
+
+    assert resp.status == HTTPStatus.OK
+    body = await resp.json()
+    assert body == {"event": event_type, "status": "ok"}
+
+    assert not issue_registry.async_get_issue(
+        domain=DOMAIN,
+        issue_id=f"deprecated_event_bus_html5_notification.{event_type}",
+    )