diff --git a/ui/src/hooks/useInboxBadge.ts b/ui/src/hooks/useInboxBadge.ts
index f2e916bd..fff0ff13 100644
--- a/ui/src/hooks/useInboxBadge.ts
+++ b/ui/src/hooks/useInboxBadge.ts
@@ -9,8 +9,10 @@ import { issuesApi } from "../api/issues";
 import { queryKeys } from "../lib/queryKeys";
 import {
   computeInboxBadgeData,
+  getRecentTouchedIssues,
   loadDismissedInboxItems,
   saveDismissedInboxItems,
+  getUnreadTouchedIssues,
 } from "../lib/inbox";
 
 const INBOX_ISSUE_STATUSES = "backlog,todo,in_progress,in_review,blocked,done";
@@ -70,16 +72,21 @@ export function useInboxBadge(companyId: string | null | undefined) {
     enabled: !!companyId,
   });
 
-  const { data: unreadIssues = [] } = useQuery({
-    queryKey: queryKeys.issues.listUnreadTouchedByMe(companyId!),
+  const { data: touchedIssues = [] } = useQuery({
+    queryKey: queryKeys.issues.listTouchedByMe(companyId!),
     queryFn: () =>
       issuesApi.list(companyId!, {
-        unreadForUserId: "me",
+        touchedByUserId: "me",
         status: INBOX_ISSUE_STATUSES,
       }),
     enabled: !!companyId,
   });
 
+  const unreadIssues = useMemo(
+    () => getUnreadTouchedIssues(getRecentTouchedIssues(touchedIssues)),
+    [touchedIssues],
+  );
+
   const { data: heartbeatRuns = [] } = useQuery({
     queryKey: queryKeys.heartbeats(companyId!),
     queryFn: () => heartbeatsApi.list(companyId!),
diff --git a/ui/src/lib/inbox.test.ts b/ui/src/lib/inbox.test.ts
index ef23423f..a8480828 100644
--- a/ui/src/lib/inbox.test.ts
+++ b/ui/src/lib/inbox.test.ts
@@ -4,8 +4,10 @@ import { beforeEach, describe, expect, it } from "vitest";
 import type { Approval, DashboardSummary, HeartbeatRun, Issue, JoinRequest } from "@paperclipai/shared";
 import {
   computeInboxBadgeData,
+  getRecentTouchedIssues,
   getUnreadTouchedIssues,
   loadLastInboxTab,
+  RECENT_ISSUES_LIMIT,
   saveLastInboxTab,
 } from "./inbox";
 
@@ -220,6 +222,19 @@ describe("inbox helpers", () => {
     expect(issues).toHaveLength(2);
   });
 
+  it("limits recent touched issues before unread badge counting", () => {
+    const issues = Array.from({ length: RECENT_ISSUES_LIMIT + 5 }, (_, index) => {
+      const issue = makeIssue(String(index + 1), index < 3);
+      issue.lastExternalCommentAt = new Date(Date.UTC(2026, 2, 31, 0, 0, 0, 0) - index * 60_000);
+      return issue;
+    });
+
+    const recentIssues = getRecentTouchedIssues(issues);
+
+    expect(recentIssues).toHaveLength(RECENT_ISSUES_LIMIT);
+    expect(getUnreadTouchedIssues(recentIssues).map((issue) => issue.id)).toEqual(["1", "2", "3"]);
+  });
+
   it("defaults the remembered inbox tab to recent and persists all", () => {
     localStorage.clear();
     expect(loadLastInboxTab()).toBe("recent");
diff --git a/ui/src/lib/inbox.ts b/ui/src/lib/inbox.ts
index e21dbabf..88447a98 100644
--- a/ui/src/lib/inbox.ts
+++ b/ui/src/lib/inbox.ts
@@ -96,6 +96,10 @@ export function sortIssuesByMostRecentActivity(a: Issue, b: Issue): number {
   return normalizeTimestamp(b.updatedAt) - normalizeTimestamp(a.updatedAt);
 }
 
+export function getRecentTouchedIssues(issues: Issue[]): Issue[] {
+  return [...issues].sort(sortIssuesByMostRecentActivity).slice(0, RECENT_ISSUES_LIMIT);
+}
+
 export function getUnreadTouchedIssues(issues: Issue[]): Issue[] {
   return issues.filter((issue) => issue.isUnreadForMe);
 }
diff --git a/ui/src/pages/Inbox.tsx b/ui/src/pages/Inbox.tsx
index b25eec25..97a191f5 100644
--- a/ui/src/pages/Inbox.tsx
+++ b/ui/src/pages/Inbox.tsx
@@ -43,10 +43,9 @@ import type { HeartbeatRun, Issue, JoinRequest } from "@paperclipai/shared";
 import {
   ACTIONABLE_APPROVAL_STATUSES,
   getLatestFailedRunsByAgent,
+  getRecentTouchedIssues,
   type InboxTab,
-  RECENT_ISSUES_LIMIT,
   saveLastInboxTab,
-  sortIssuesByMostRecentActivity,
 } from "../lib/inbox";
 import { useDismissedInboxItems } from "../hooks/useInboxBadge";
 
@@ -329,10 +328,7 @@ export function Inbox() {
     enabled: !!selectedCompanyId,
   });
 
-  const touchedIssues = useMemo(
-    () => [...touchedIssuesRaw].sort(sortIssuesByMostRecentActivity).slice(0, RECENT_ISSUES_LIMIT),
-    [touchedIssuesRaw],
-  );
+  const touchedIssues = useMemo(() => getRecentTouchedIssues(touchedIssuesRaw), [touchedIssuesRaw]);
   const unreadTouchedIssues = useMemo(
     () => touchedIssues.filter((issue) => issue.isUnreadForMe),
     [touchedIssues],
@@ -435,17 +431,20 @@ export function Inbox() {
 
   const [fadingOutIssues, setFadingOutIssues] = useState<Set<string>>(new Set());
 
+  const invalidateInboxIssueQueries = () => {
+    if (!selectedCompanyId) return;
+    queryClient.invalidateQueries({ queryKey: queryKeys.issues.listTouchedByMe(selectedCompanyId) });
+    queryClient.invalidateQueries({ queryKey: queryKeys.issues.listUnreadTouchedByMe(selectedCompanyId) });
+    queryClient.invalidateQueries({ queryKey: queryKeys.sidebarBadges(selectedCompanyId) });
+  };
+
   const markReadMutation = useMutation({
     mutationFn: (id: string) => issuesApi.markRead(id),
     onMutate: (id) => {
       setFadingOutIssues((prev) => new Set(prev).add(id));
     },
     onSuccess: () => {
-      if (selectedCompanyId) {
-        queryClient.invalidateQueries({ queryKey: queryKeys.issues.listTouchedByMe(selectedCompanyId) });
-        queryClient.invalidateQueries({ queryKey: queryKeys.issues.listUnreadTouchedByMe(selectedCompanyId) });
-        queryClient.invalidateQueries({ queryKey: queryKeys.sidebarBadges(selectedCompanyId) });
-      }
+      invalidateInboxIssueQueries();
     },
     onSettled: (_data, _error, id) => {
       setTimeout(() => {
@@ -458,6 +457,31 @@ export function Inbox() {
     },
   });
 
+  const markAllReadMutation = useMutation({
+    mutationFn: async (issueIds: string[]) => {
+      await Promise.all(issueIds.map((issueId) => issuesApi.markRead(issueId)));
+    },
+    onMutate: (issueIds) => {
+      setFadingOutIssues((prev) => {
+        const next = new Set(prev);
+        for (const issueId of issueIds) next.add(issueId);
+        return next;
+      });
+    },
+    onSuccess: () => {
+      invalidateInboxIssueQueries();
+    },
+    onSettled: (_data, _error, issueIds) => {
+      setTimeout(() => {
+        setFadingOutIssues((prev) => {
+          const next = new Set(prev);
+          for (const issueId of issueIds) next.delete(issueId);
+          return next;
+        });
+      }, 300);
+    },
+  });
+
   if (!selectedCompanyId) {
     return <EmptyState icon={InboxIcon} message="Select a company to view inbox." />;
   }
@@ -515,6 +539,10 @@ export function Inbox() {
     !isRunsLoading;
 
   const showSeparatorBefore = (key: SectionKey) => visibleSections.indexOf(key) > 0;
+  const unreadIssueIds = unreadTouchedIssues
+    .filter((issue) => !fadingOutIssues.has(issue.id))
+    .map((issue) => issue.id);
+  const canMarkAllRead = unreadIssueIds.length > 0;
 
   return (
     <div className="space-y-6">
@@ -532,8 +560,22 @@ export function Inbox() {
           />
         </Tabs>
 
-        {tab === "all" && (
-          <div className="flex flex-wrap items-center gap-2">
+        <div className="flex flex-wrap items-center gap-2">
+          {canMarkAllRead && (
+            <Button
+              type="button"
+              variant="outline"
+              size="sm"
+              className="h-8"
+              onClick={() => markAllReadMutation.mutate(unreadIssueIds)}
+              disabled={markAllReadMutation.isPending}
+            >
+              {markAllReadMutation.isPending ? "Marking…" : "Mark all as read"}
+            </Button>
+          )}
+
+          {tab === "all" && (
+            <>
             <Select
               value={allCategoryFilter}
               onValueChange={(value) => setAllCategoryFilter(value as InboxCategoryFilter)}
@@ -566,8 +608,9 @@ export function Inbox() {
                 </SelectContent>
               </Select>
             )}
-          </div>
-        )}
+            </>
+          )}
+        </div>
       </div>
 
       {approvalsError && <p className="text-sm text-destructive">{approvalsError.message}</p>}