diff --git a/homeassistant/components/schlage/config_flow.py b/homeassistant/components/schlage/config_flow.py
index 2e3faf6a51c..f359f7dda71 100644
--- a/homeassistant/components/schlage/config_flow.py
+++ b/homeassistant/components/schlage/config_flow.py
@@ -31,7 +31,7 @@ class SchlageConfigFlow(ConfigFlow, domain=DOMAIN):
         """Handle the initial step."""
         if user_input is None:
             return self._show_user_form({})
-        username = user_input[CONF_USERNAME]
+        username = user_input[CONF_USERNAME].lower()
         password = user_input[CONF_PASSWORD]
         user_id, errors = await self.hass.async_add_executor_job(
             _authenticate, username, password
@@ -40,7 +40,13 @@ class SchlageConfigFlow(ConfigFlow, domain=DOMAIN):
             return self._show_user_form(errors)
 
         await self.async_set_unique_id(user_id)
-        return self.async_create_entry(title=username, data=user_input)
+        return self.async_create_entry(
+            title=username,
+            data={
+                CONF_USERNAME: username,
+                CONF_PASSWORD: password,
+            },
+        )
 
     def _show_user_form(self, errors: dict[str, str]) -> ConfigFlowResult:
         """Show the user form."""
diff --git a/tests/components/schlage/test_config_flow.py b/tests/components/schlage/test_config_flow.py
index 15ef3858c0c..7f4a40f9b53 100644
--- a/tests/components/schlage/test_config_flow.py
+++ b/tests/components/schlage/test_config_flow.py
@@ -15,8 +15,18 @@ from tests.common import MockConfigEntry
 pytestmark = pytest.mark.usefixtures("mock_setup_entry")
 
 
+@pytest.mark.parametrize(
+    "username",
+    [
+        "test-username",
+        "TEST-USERNAME",
+    ],
+)
 async def test_form(
-    hass: HomeAssistant, mock_setup_entry: AsyncMock, mock_pyschlage_auth: Mock
+    hass: HomeAssistant,
+    mock_setup_entry: AsyncMock,
+    mock_pyschlage_auth: Mock,
+    username: str,
 ) -> None:
     """Test we get the form."""
     result = await hass.config_entries.flow.async_init(
@@ -28,7 +38,7 @@ async def test_form(
     result2 = await hass.config_entries.flow.async_configure(
         result["flow_id"],
         {
-            "username": "test-username",
+            "username": username,
             "password": "test-password",
         },
     )