diff --git a/homeassistant/components/monzo/coordinator.py b/homeassistant/components/monzo/coordinator.py
index 223d7b05ffe..caac551f986 100644
--- a/homeassistant/components/monzo/coordinator.py
+++ b/homeassistant/components/monzo/coordinator.py
@@ -3,13 +3,14 @@
 from dataclasses import dataclass
 from datetime import timedelta
 import logging
+from pprint import pformat
 from typing import Any
 
-from monzopy import AuthorisationExpiredError
+from monzopy import AuthorisationExpiredError, InvalidMonzoAPIResponseError
 
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import ConfigEntryAuthFailed
-from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 
 from .api import AuthenticatedMonzoAPI
 from .const import DOMAIN
@@ -45,5 +46,16 @@ class MonzoCoordinator(DataUpdateCoordinator[MonzoData]):
             pots = await self.api.user_account.pots()
         except AuthorisationExpiredError as err:
             raise ConfigEntryAuthFailed from err
+        except InvalidMonzoAPIResponseError as err:
+            message = "Invalid Monzo API response."
+            if err.missing_key:
+                _LOGGER.debug(
+                    "%s\nMissing key: %s\nResponse:\n%s",
+                    message,
+                    err.missing_key,
+                    pformat(err.response),
+                )
+                message += " Enabling debug logging for details."
+            raise UpdateFailed(message) from err
 
         return MonzoData(accounts, pots)
diff --git a/tests/components/monzo/test_sensor.py b/tests/components/monzo/test_sensor.py
index bf88ce14931..a57466fdbd4 100644
--- a/tests/components/monzo/test_sensor.py
+++ b/tests/components/monzo/test_sensor.py
@@ -5,6 +5,7 @@ from typing import Any
 from unittest.mock import AsyncMock
 
 from freezegun.api import FrozenDateTimeFactory
+from monzopy import InvalidMonzoAPIResponseError
 import pytest
 from syrupy import SnapshotAssertion
 
@@ -123,15 +124,22 @@ async def test_update_failed(
     monzo: AsyncMock,
     polling_config_entry: MockConfigEntry,
     freezer: FrozenDateTimeFactory,
+    caplog: pytest.LogCaptureFixture,
 ) -> None:
     """Test all entities."""
     await setup_integration(hass, polling_config_entry)
 
-    monzo.user_account.accounts.side_effect = Exception
+    monzo.user_account.accounts.side_effect = InvalidMonzoAPIResponseError(
+        {"acc_id": None}, "account_id"
+    )
     freezer.tick(timedelta(minutes=10))
     async_fire_time_changed(hass)
     await hass.async_block_till_done()
 
+    assert "Invalid Monzo API response." in caplog.text
+    assert "account_id" in caplog.text
+    assert "acc_id" in caplog.text
+
     entity_id = await async_get_entity_id(
         hass, TEST_ACCOUNTS[0]["id"], ACCOUNT_SENSORS[0]
     )