diff --git a/src/components/SocialPostingModal.tsx b/src/components/SocialPostingModal.tsx
index 486f377..501c977 100644
--- a/src/components/SocialPostingModal.tsx
+++ b/src/components/SocialPostingModal.tsx
@@ -157,6 +157,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
   const [uploadVideoTitle, setUploadVideoTitle] = useState<string>('');
   const [uploadChannelName, setUploadChannelName] = useState<string>('');
   const [uploadIsScheduled, setUploadIsScheduled] = useState(false);
+  const [uploadScheduledAt, setUploadScheduledAt] = useState<string | null>(null);
 
   // 드롭다운 외부 클릭 시 닫기
   useEffect(() => {
@@ -373,12 +374,13 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
         // 예약 업로드: 폴링 없이 바로 완료 처리
         setUploadStatus('completed');
         setUploadProgress(100);
+        setUploadScheduledAt(uploadResponse.scheduled_at ?? null);
         onClose();
         resetForm();
       } else {
         // 즉시 업로드: 완료될 때까지 폴링
         const result = await waitForUploadComplete(
-          uploadResponse.upload_id,
+          uploadResponse.upload_id.toString(),
           (status, progress) => {
             setUploadStatus(status as UploadStatus);
             setUploadProgress(progress || 0);
@@ -432,6 +434,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
     setUploadVideoTitle('');
     setUploadChannelName('');
     setUploadIsScheduled(false);
+    setUploadScheduledAt(null);
   };
 
   const handleClose = () => {
@@ -461,6 +464,7 @@ const SocialPostingModal: React.FC<SocialPostingModalProps> = ({
       youtubeUrl={uploadYoutubeUrl}
       errorMessage={uploadErrorMessage}
       isScheduled={uploadIsScheduled}
+      scheduledAt={uploadScheduledAt}
       onGoToCalendar={onGoToCalendar}
     />
   );
diff --git a/src/components/UploadProgressModal.tsx b/src/components/UploadProgressModal.tsx
index 8572619..8aec55a 100644
--- a/src/components/UploadProgressModal.tsx
+++ b/src/components/UploadProgressModal.tsx
@@ -14,6 +14,7 @@ interface UploadProgressModalProps {
   youtubeUrl?: string;
   errorMessage?: string;
   isScheduled?: boolean;
+  scheduledAt?: string | null;
   onGoToCalendar?: () => void;
 }
 
@@ -27,6 +28,7 @@ const UploadProgressModal: React.FC<UploadProgressModalProps> = ({
   youtubeUrl,
   errorMessage,
   isScheduled = false,
+  scheduledAt,
   onGoToCalendar,
 }) => {
   const { t } = useTranslation();
@@ -148,6 +150,28 @@ const UploadProgressModal: React.FC<UploadProgressModalProps> = ({
               {t('upload.viewOnYoutube')}
             </a>
           )}
+
+          {/* Scheduled conflict notice */}
+          {status === 'completed' && isScheduled && scheduledAt && (
+            <div className="upload-progress-schedule-notice">
+              <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+                <circle cx="12" cy="12" r="10" />
+                <line x1="12" y1="8" x2="12" y2="12" />
+                <line x1="12" y1="16" x2="12.01" y2="16" />
+              </svg>
+              <span>
+                {t('upload.scheduleConflict', {
+                  time: new Date(scheduledAt).toLocaleString('ko-KR', {
+                    year: 'numeric',
+                    month: 'long',
+                    day: 'numeric',
+                    hour: '2-digit',
+                    minute: '2-digit',
+                  }),
+                })}
+              </span>
+            </div>
+          )}
         </div>
 
         {/* Footer */}
diff --git a/src/locales/en.json b/src/locales/en.json
index a6393c5..7b3c09b 100644
--- a/src/locales/en.json
+++ b/src/locales/en.json
@@ -154,8 +154,8 @@
     "confirm": "OK",
     "close": "Close",
     "doNotClose": "Upload is in progress. Do not close this window.",
-    "goToCalendar": "View in Calendar"
-  },
+	  "goToCalendar": "View in Calendar",
+    "scheduleConflict": "Schedule adjusted to {{time}} due to a conflict."  },
   "landing": {
     "hero": {
       "searchTypeBusinessName": "Business Name",
diff --git a/src/locales/ko.json b/src/locales/ko.json
index 26a79ed..cde52e4 100644
--- a/src/locales/ko.json
+++ b/src/locales/ko.json
@@ -154,8 +154,8 @@
     "confirm": "확인",
     "close": "닫기",
     "doNotClose": "업로드가 진행 중입니다. 창을 닫지 마세요.",
-    "goToCalendar": "캘린더에서 확인"
-  },
+    "goToCalendar": "캘린더에서 확인",
+    "scheduleConflict": "예약 시간이 충돌하여 {{time}}으로 조정되었습니다."  },
   "landing": {
     "hero": {
       "searchTypeBusinessName": "업체명",
diff --git a/src/types/api.ts b/src/types/api.ts
index c3373e6..e055eef 100644
--- a/src/types/api.ts
+++ b/src/types/api.ts
@@ -412,9 +412,11 @@ export interface SocialUploadRequest {
 // 소셜 업로드 응답
 export interface SocialUploadResponse {
   success: boolean;
-  upload_id: string;
-  status: 'pending' | 'uploading' | 'completed' | 'failed';
+  upload_id: number;
+  platform: string;
+  status: string;
   message: string;
+  scheduled_at?: string | null;  // 예약 업로드 충돌 시 실제 예약 시간 반환
 }
 
 // 소셜 업로드 상태 조회 응답