diff --git a/docs/launch-readiness.md b/docs/launch-readiness.md
index d75aa489..f1a79eff 100644
--- a/docs/launch-readiness.md
+++ b/docs/launch-readiness.md
@@ -50,6 +50,16 @@ Phases (status snapshot 2026-05-27):
    PDF; server-side PDF endpoint for branded output. _See gaps
    below._
 3. ❌ Marketing report — NOT BUILT. Pending Init 1b cutover.
+   **Beta gate (2026-06-02):** the `marketing` kind in
+   `reports/[kind]/page.tsx` now returns `notFound()` (via
+   `UNAVAILABLE_NEW_KINDS`) instead of the "in development" placeholder,
+   so the beta reports surface reads as complete — the landing page only
+   advertises Sales / Operational / Financial / Custom, and the
+   hand-typed `/reports/marketing` URL 404s. **Remove the
+   `UNAVAILABLE_NEW_KINDS` entry when this report ships.** Decision: keep
+   the reports page live for beta rather than hiding it behind a module
+   toggle — 3 of 4 reports are fully built + verified (export, templates,
+   scheduling) and strictly beat the dashboard-only fallback.
 4. ✅ Financial report — **SHIPPED in b690fb8d.** Built on the canonical
    payments + expenses tables (invoices module stays OFF); the
    invoice-centric spec was reframed onto the payments model
diff --git a/src/app/(dashboard)/[portSlug]/reports/[kind]/page.tsx b/src/app/(dashboard)/[portSlug]/reports/[kind]/page.tsx
index 5588a6c7..85baa125 100644
--- a/src/app/(dashboard)/[portSlug]/reports/[kind]/page.tsx
+++ b/src/app/(dashboard)/[portSlug]/reports/[kind]/page.tsx
@@ -27,6 +27,18 @@ const NEW_KINDS = ['sales', 'financial', 'marketing', 'operational', 'custom'] a
 type LegacyKind = (typeof LEGACY_KINDS)[number];
 type NewKind = (typeof NEW_KINDS)[number];
 
+/**
+ * NEW_KINDS that have a card on the /reports landing page each own a
+ * dedicated route (reports/sales, reports/operational, reports/financial,
+ * reports/custom) which shadows this dynamic segment. The only NEW_KIND that
+ * still resolves here is `marketing`, whose builder is blocked on the website
+ * cutover (launch-readiness Initiative 1b) and currently renders only an "in
+ * development" placeholder. Gate it to a 404 for beta so it can't be reached
+ * via a hand-typed URL or a stale saved template. Remove the entry when the
+ * Marketing report ships.
+ */
+const UNAVAILABLE_NEW_KINDS: readonly NewKind[] = ['marketing'];
+
 interface PageProps {
   params: Promise<{ portSlug: string; kind: string }>;
   searchParams: Promise<{ from?: string; to?: string }>;
@@ -74,6 +86,11 @@ export default async function ReportBuilderPage({ params, searchParams }: PagePr
   const isNew = (NEW_KINDS as readonly string[]).includes(kind);
   if (!isLegacy && !isNew) notFound();
 
+  // Unbuilt report kinds (currently just Marketing) 404 rather than show the
+  // "in development" placeholder — keeps the beta reports surface looking
+  // complete. See UNAVAILABLE_NEW_KINDS above.
+  if ((UNAVAILABLE_NEW_KINDS as readonly string[]).includes(kind)) notFound();
+
   if (isLegacy) {
     const typedKind = kind as LegacyKind;
     const labels = LEGACY_LABELS[typedKind];