diff --git a/changelogs/fragments/20260506-improve_idempotency_for_helm_repository.yaml b/changelogs/fragments/20260506-improve_idempotency_for_helm_repository.yaml
new file mode 100644
index 00000000..9c1599fa
--- /dev/null
+++ b/changelogs/fragments/20260506-improve_idempotency_for_helm_repository.yaml
@@ -0,0 +1,2 @@
+bugfixes:
+  - helm_repository - correct handling of repository URLs with trailing slashes (https://github.com/ansible-collections/kubernetes.core/pull/1121).
diff --git a/plugins/modules/helm_repository.py b/plugins/modules/helm_repository.py
index ce0d1a36..e434f467 100644
--- a/plugins/modules/helm_repository.py
+++ b/plugins/modules/helm_repository.py
@@ -302,6 +302,8 @@ def main():
 
     repo_name = module.params.get("repo_name")
     repo_url = module.params.get("repo_url")
+    if repo_url:
+        repo_url = repo_url.rstrip("/")
     repo_username = module.params.get("repo_username")
     repo_password = module.params.get("repo_password")
     repo_state = module.params.get("repo_state")