diff --git a/homeassistant/components/remote/significant_change.py b/homeassistant/components/remote/significant_change.py
new file mode 100644
index 00000000000..8e5a3669041
--- /dev/null
+++ b/homeassistant/components/remote/significant_change.py
@@ -0,0 +1,27 @@
+"""Helper to test significant Remote state changes."""
+from __future__ import annotations
+
+from typing import Any
+
+from homeassistant.core import HomeAssistant, callback
+
+from . import ATTR_CURRENT_ACTIVITY
+
+
+@callback
+def async_check_significant_change(
+    hass: HomeAssistant,
+    old_state: str,
+    old_attrs: dict,
+    new_state: str,
+    new_attrs: dict,
+    **kwargs: Any,
+) -> bool | None:
+    """Test if state significantly changed."""
+    if old_state != new_state:
+        return True
+
+    if old_attrs.get(ATTR_CURRENT_ACTIVITY) != new_attrs.get(ATTR_CURRENT_ACTIVITY):
+        return True
+
+    return False
diff --git a/tests/components/remote/test_significant_change.py b/tests/components/remote/test_significant_change.py
new file mode 100644
index 00000000000..dcbfce213d6
--- /dev/null
+++ b/tests/components/remote/test_significant_change.py
@@ -0,0 +1,62 @@
+"""Test the Remote significant change platform."""
+from homeassistant.components.remote import ATTR_ACTIVITY_LIST, ATTR_CURRENT_ACTIVITY
+from homeassistant.components.remote.significant_change import (
+    async_check_significant_change,
+)
+
+
+async def test_significant_change() -> None:
+    """Detect Remote significant changes."""
+    # no change at all
+    attrs = {
+        ATTR_CURRENT_ACTIVITY: "playing",
+        ATTR_ACTIVITY_LIST: ["playing", "paused"],
+    }
+    assert not async_check_significant_change(None, "on", attrs, "on", attrs)
+
+    # change of state is significant
+    assert async_check_significant_change(None, "on", attrs, "off", attrs)
+
+    # change of current activity is significant
+    attrs = {
+        "old": {
+            ATTR_CURRENT_ACTIVITY: "playing",
+            ATTR_ACTIVITY_LIST: ["playing", "paused"],
+        },
+        "new": {
+            ATTR_CURRENT_ACTIVITY: "paused",
+            ATTR_ACTIVITY_LIST: ["playing", "paused"],
+        },
+    }
+    assert async_check_significant_change(None, "on", attrs["old"], "on", attrs["new"])
+
+    # change of list of possible activities is not significant
+    attrs = {
+        "old": {
+            ATTR_CURRENT_ACTIVITY: "playing",
+            ATTR_ACTIVITY_LIST: ["playing", "paused"],
+        },
+        "new": {
+            ATTR_CURRENT_ACTIVITY: "playing",
+            ATTR_ACTIVITY_LIST: ["playing"],
+        },
+    }
+    assert not async_check_significant_change(
+        None, "on", attrs["old"], "on", attrs["new"]
+    )
+
+    # change of any not official attribute is not significant
+    attrs = {
+        "old": {
+            ATTR_CURRENT_ACTIVITY: "playing",
+            ATTR_ACTIVITY_LIST: ["playing", "paused"],
+        },
+        "new": {
+            ATTR_CURRENT_ACTIVITY: "playing",
+            ATTR_ACTIVITY_LIST: ["playing", "paused"],
+            "not_official": "changed",
+        },
+    }
+    assert not async_check_significant_change(
+        None, "on", attrs["old"], "on", attrs["new"]
+    )