diff --git a/frontend/src/components/ChannelPage.tsx b/frontend/src/components/ChannelPage.tsx
index e3ce76d4..52f590f8 100644
--- a/frontend/src/components/ChannelPage.tsx
+++ b/frontend/src/components/ChannelPage.tsx
@@ -445,7 +445,10 @@ export default function ChannelPage({
                     {t("channel.subscribe")}
                   </button>
                 ))}
-              {ch && !me.is_demo && (
+              {/* Tagging is a subscription-scoped action (attach_tag → _user_subscription 404s
+                  otherwise), and personal tags are for your subscriptions — so only offer it on a
+                  channel you actually follow. */}
+              {ch?.subscribed && !me.is_demo && (
                 <ChannelTagsControl
                   userTags={userTags}
                   attachedIds={ch.tag_ids}