diff --git a/swh/loader/core/loader.py b/swh/loader/core/loader.py
--- a/swh/loader/core/loader.py
+++ b/swh/loader/core/loader.py
@@ -38,6 +38,9 @@
     "max_content_size": 100 * 1024 * 1024,
 }
 
+SENTRY_ORIGIN_URL_TAG_NAME = "swh.loader.origin_url"
+SENTRY_VISIT_TYPE_TAG_NAME = "swh.loader.visit_type"
+
 
 class BaseLoader:
     """Base class for (D)VCS loaders (e.g Svn, Git, Mercurial, ...) or PackageLoader (e.g
@@ -116,6 +119,9 @@
         _log = logging.getLogger("requests.packages.urllib3.connectionpool")
         _log.setLevel(logging.WARN)
 
+        sentry_sdk.set_tag(SENTRY_ORIGIN_URL_TAG_NAME, self.origin.url)
+        sentry_sdk.set_tag(SENTRY_VISIT_TYPE_TAG_NAME, self.visit_type)
+
         # possibly overridden in self.prepare method
         self.visit_date = datetime.datetime.now(tz=datetime.timezone.utc)
 
diff --git a/swh/loader/core/tests/test_loader.py b/swh/loader/core/tests/test_loader.py
--- a/swh/loader/core/tests/test_loader.py
+++ b/swh/loader/core/tests/test_loader.py
@@ -11,7 +11,12 @@
 
 import pytest
 
-from swh.loader.core.loader import BaseLoader, DVCSLoader
+from swh.loader.core.loader import (
+    SENTRY_ORIGIN_URL_TAG_NAME,
+    SENTRY_VISIT_TYPE_TAG_NAME,
+    BaseLoader,
+    DVCSLoader,
+)
 from swh.loader.core.metadata_fetchers import MetadataFetcherProtocol
 from swh.loader.exception import NotFound
 from swh.loader.tests import assert_last_visit_matches
@@ -479,3 +484,22 @@
     assert result == {"status": "uneventful"}
 
     _check_load_failure(caplog, loader, NotFound, "Unknown origin!", status="not_found")
+
+
+class DummyLoaderWithError(DummyBaseLoader):
+    def prepare(self, *args, **kwargs):
+        raise Exception("error")
+
+
+class DummyDVCSLoaderWithError(DummyDVCSLoader, BaseLoader):
+    def prepare(self, *args, **kwargs):
+        raise Exception("error")
+
+
+@pytest.mark.parametrize("loader_cls", [DummyLoaderWithError, DummyDVCSLoaderWithError])
+def test_loader_sentry_tags_on_error(swh_storage, sentry_events, loader_cls):
+    loader = loader_cls(swh_storage)
+    loader.load()
+    sentry_tags = sentry_events[0]["tags"]
+    assert sentry_tags.get(SENTRY_ORIGIN_URL_TAG_NAME) == ORIGIN.url
+    assert sentry_tags.get(SENTRY_VISIT_TYPE_TAG_NAME) == DummyLoader.visit_type
diff --git a/swh/loader/package/tests/test_loader.py b/swh/loader/package/tests/test_loader.py
--- a/swh/loader/package/tests/test_loader.py
+++ b/swh/loader/package/tests/test_loader.py
@@ -12,6 +12,10 @@
 import attr
 import pytest
 
+from swh.loader.core.loader import (
+    SENTRY_ORIGIN_URL_TAG_NAME,
+    SENTRY_VISIT_TYPE_TAG_NAME,
+)
 from swh.loader.package.loader import BasePackageInfo, PackageLoader
 from swh.model.model import (
     Origin,
@@ -518,3 +522,20 @@
         AssertionError, match="SWH_CONFIG_FILENAME environment variable is undefined"
     ):
         DummyPackageLoader.from_configfile(url="some-url")
+
+
+class StubPackageLoaderWithError(StubPackageLoader):
+    def get_versions(self, *args, **kwargs):
+        raise Exception("error")
+
+
+def test_loader_sentry_tags_on_error(swh_storage, sentry_events):
+    origin_url = "http://example.org/package/name"
+    loader = StubPackageLoaderWithError(swh_storage, origin_url)
+    loader.load()
+    sentry_tags = sentry_events[0]["tags"]
+    assert sentry_tags.get(SENTRY_ORIGIN_URL_TAG_NAME) == origin_url
+    assert (
+        sentry_tags.get(SENTRY_VISIT_TYPE_TAG_NAME)
+        == StubPackageLoaderWithError.visit_type
+    )