diff --git a/src/hooks/photoFeed/posts/useInfinitePosts.ts b/src/hooks/photoFeed/posts/useInfinitePosts.ts
index 94c3e122..f9e40d8d 100644
--- a/src/hooks/photoFeed/posts/useInfinitePosts.ts
+++ b/src/hooks/photoFeed/posts/useInfinitePosts.ts
@@ -17,11 +17,11 @@ export function useInfinitePosts() {
     getNextPageParam: (lastPage, allPages) =>
       lastPage.previewList.length < PAGE_SIZE ? undefined : allPages.length,
 
-    staleTime: 1000 * 60 * 5, // 5분 동안은 "신선" → 마운트돼도 refetch 안 함
-    gcTime: 1000 * 60 * 30, // 30분간 캐시 유지 (v5, v4면 cacheTime)
+    staleTime: 1000 * 60, // 1분 동안은 "신선" → 마운트돼도 refetch 안 함
+    gcTime: 1000 * 60 * 5, // 5분간 캐시 유지
     refetchOnMount: false, // 컴포넌트 마운트 시 재요청 막기
     refetchOnWindowFocus: false, // 탭 다시 클릭/포커스 시 재요청 막기
     refetchOnReconnect: false, // 네트워크 재연결 시 재요청 막기
-    retry: 1, // (선택) 실패 시 재시도 횟수 줄이기
+    retry: 1, // 실패 시 재시도 횟수 줄이기
   });
 }
diff --git a/src/pages/photoFeed/PhotoFeedPage.tsx b/src/pages/photoFeed/PhotoFeedPage.tsx
index 37f8e539..b0ed224f 100644
--- a/src/pages/photoFeed/PhotoFeedPage.tsx
+++ b/src/pages/photoFeed/PhotoFeedPage.tsx
@@ -25,6 +25,9 @@ const breakpointColumnsObj = {
   1024: 2,
 };
 
+export const TOAST_FADE_START_DELAY = 1600;
+export const TOAST_UNMOUNT_DELAY = 3000;
+
 export default function PhotoFeedPage() {
   const [isCreateModalOpen, setIsCreateModalOpen] = useState(false);
   const sentinelRef = useRef<HTMLDivElement | null>(null);
@@ -41,14 +44,20 @@ export default function PhotoFeedPage() {
   useEffect(() => {
     if (!isDeleted) return;
 
-    const fadeTimer = setTimeout(() => setToastVisible(false), 1600);
-    const removeTimer = setTimeout(() => setMounted(false), 3000);
+    const fadeTimer = setTimeout(
+      () => setToastVisible(false),
+      TOAST_FADE_START_DELAY,
+    );
+    const removeTimer = setTimeout(() => {
+      setMounted(false);
+      navigate(location.pathname, { replace: true }); // 타이머 없앨 때 state도 같이 삭제
+    }, TOAST_UNMOUNT_DELAY);
 
     return () => {
       clearTimeout(fadeTimer);
       clearTimeout(removeTimer);
     };
-  }, [isDeleted]);
+  }, [isDeleted, navigate, location.pathname]);
 
   const {
     data,
diff --git a/src/pages/photoFeed/PostPage.tsx b/src/pages/photoFeed/PostPage.tsx
index 1b53388c..01be4951 100644
--- a/src/pages/photoFeed/PostPage.tsx
+++ b/src/pages/photoFeed/PostPage.tsx
@@ -15,6 +15,7 @@ import EmptyView from "@/components/common/EmptyView";
 import CommentSheet from "@/components/photoFeed/postDetail/CommentSheet";
 import { useNewPostState } from "@/store/useNewPostState.store";
 import ProfileSkeleton from "@/components/photoFeed/postDetail/ProfileSkeleton";
+import { TOAST_FADE_START_DELAY, TOAST_UNMOUNT_DELAY } from "./PhotoFeedPage";
 
 export default function PostPage() {
   const [commentVisible, setCommentVisible] = useState(false);
@@ -63,8 +64,14 @@ export default function PostPage() {
   useEffect(() => {
     if (!isNewPost) return;
 
-    const fadeTimer = setTimeout(() => setToastVisible(false), 1600);
-    const removeTimer = setTimeout(() => setMounted(false), 3000);
+    const fadeTimer = setTimeout(
+      () => setToastVisible(false),
+      TOAST_FADE_START_DELAY,
+    );
+    const removeTimer = setTimeout(() => {
+      setIsNewPost(false);
+      setMounted(false);
+    }, TOAST_UNMOUNT_DELAY);
 
     return () => {
       clearTimeout(fadeTimer);