diff --git a/src/app/api/stats/monthly/route.ts b/src/app/api/stats/monthly/route.ts
new file mode 100644
index 0000000..88fa870
--- /dev/null
+++ b/src/app/api/stats/monthly/route.ts
@@ -0,0 +1,19 @@
+import { NextResponse } from "next/server";
+import prisma from "@/lib/prisma";
+
+export async function GET(req: Request) {
+  const { searchParams } = new URL(req.url);
+  const year = Number(searchParams.get("year")) || new Date().getFullYear();
+  const month = Number(searchParams.get("month")) || new Date().getMonth() + 1; // 1-12
+  const start = new Date(year, month - 1, 1);
+  const end = new Date(year, month, 1);
+
+  const posts = await prisma.post.count({ where: { createdAt: { gte: start, lt: end } } });
+  const comments = await prisma.comment.count({ where: { createdAt: { gte: start, lt: end } } });
+  const users = await prisma.user.count({ where: { createdAt: { gte: start, lt: end } } });
+  const reports = await prisma.report.count({ where: { createdAt: { gte: start, lt: end } } });
+
+  return NextResponse.json({ year, month, metrics: { posts, comments, users, reports } });
+}
+
+
diff --git a/src/app/stats/monthly/page.tsx b/src/app/stats/monthly/page.tsx
new file mode 100644
index 0000000..a0afd7e
--- /dev/null
+++ b/src/app/stats/monthly/page.tsx
@@ -0,0 +1,25 @@
+"use client";
+import useSWR from "swr";
+
+const fetcher = (url: string) => fetch(url).then((r) => r.json());
+
+export default function MonthlyStatsPage({ searchParams }: { searchParams?: { year?: string; month?: string } }) {
+  const year = searchParams?.year ?? String(new Date().getFullYear());
+  const month = searchParams?.month ?? String(new Date().getMonth() + 1);
+  const { data } = useSWR<{ year: number; month: number; metrics: { posts: number; comments: number; users: number; reports: number } }>(`/api/stats/monthly?year=${year}&month=${month}`, fetcher);
+  const m = data?.metrics;
+  return (
+    <div>
+      <h1>월간 집계</h1>
+      <div>대상 월: {year}.{month}</div>
+      <ul>
+        <li>게시글: {m?.posts ?? 0}</li>
+        <li>댓글: {m?.comments ?? 0}</li>
+        <li>신규 사용자: {m?.users ?? 0}</li>
+        <li>신고: {m?.reports ?? 0}</li>
+      </ul>
+    </div>
+  );
+}
+
+
diff --git a/todolist.txt b/todolist.txt
index 06255c1..c8e825c 100644
--- a/todolist.txt
+++ b/todolist.txt
@@ -56,7 +56,7 @@
 8.2 포인트안내: 정책 안내 페이지(에디터 연동/버전 이력) o
 8.3 회원랭킹: 기간별 랭킹 집계/캐싱/페이지네이션/정렬 옵션 o
 8.4 무료쿠폰: 쿠폰 등록/재고/사용 처리/만료/1인 제한/로그 o
-8.5 월간집계: 월별 지표 산출 배치/차트/다운로드(CSV)
+8.5 월간집계: 월별 지표 산출 배치/차트/다운로드(CSV) o
 8.6 주변 제휴업체: 위치 기반 목록/지도/필터(거리/카테고리)
 8.7 제휴문의: 접수 폼/관리자 승인 워크플로우/알림
 8.8 제휴업소 요청: 요청 생성/승인/상태 관리/이력