diff --git a/src/apis/axiosClient.ts b/src/apis/axiosClient.ts
index 90cddad..5d02009 100644
--- a/src/apis/axiosClient.ts
+++ b/src/apis/axiosClient.ts
@@ -2,7 +2,7 @@ import axios from "axios";
 import { AuthError } from "./errors";
 
 export const axiosClient = axios.create({
-  baseURL: "/api",
+  baseURL: "",
   withCredentials: true, // 쿠키 인증이면 필수
 });
 
diff --git a/src/apis/createAxiosServer.ts b/src/apis/createAxiosServer.ts
index 363cd70..4cc9b34 100644
--- a/src/apis/createAxiosServer.ts
+++ b/src/apis/createAxiosServer.ts
@@ -5,7 +5,9 @@ import { headers as nextHeaders } from "next/headers";
 import { AuthError } from "./errors";
 
 const API_PREFIX = normalizePrefix(process.env.NEXT_PUBLIC_API_BASE ?? "/api");
-const API_BASE_URL = (process.env.NEXT_PUBLIC_API_URL || "").trim().replace(/\/+$/, "");
+const API_BASE_URL = (process.env.NEXT_PUBLIC_API_URL || "")
+  .trim()
+  .replace(/\/+$/, "");
 const ENV_SITE_URL = ensureOrigin(process.env.NEXT_PUBLIC_SITE_URL);
 
 const devHttpsAgent =
diff --git a/src/app/(plain)/exercise/class/[id]/page.tsx b/src/app/(plain)/exercise/class/[id]/page.tsx
index 296d7bf..93d36a2 100644
--- a/src/app/(plain)/exercise/class/[id]/page.tsx
+++ b/src/app/(plain)/exercise/class/[id]/page.tsx
@@ -5,6 +5,7 @@ import useProgramStore from "@/states/useProgramStore";
 import WorkoutVideoPlaylist from "./panel/WorkoutVideoPlayer";
 import { useRouter } from "next/navigation";
 import { useClientReady } from "@/hooks/useClientReady";
+import { getGtmClassType, pushGtmEvent } from "@/utils/gtm";
 // import { useDeadlineTrigger } from "@/hooks/useDeadlineTrigger";
 // import dayjs from "dayjs";
 // import { useToastStore } from "@/states/useToastStore";
@@ -12,17 +13,21 @@ import { useClientReady } from "@/hooks/useClientReady";
 const Page = () => {
   const isClientReady = useClientReady();
   const router = useRouter();
-  const { selectedProgram } = useProgramStore();
+  const { selectedProgram, type } = useProgramStore();
 
   // const { setToastOpen } = useToastStore();
 
+  const startFired = React.useRef(false);
   useEffect(() => {
     if (!isClientReady) return;
     else if (!selectedProgram) {
       router.push("/");
+    } else if (!startFired.current) {
+      pushGtmEvent("click_Start", getGtmClassType(type));
+      startFired.current = true;
     }
     return () => {};
-  }, [selectedProgram, router, isClientReady]);
+  }, [selectedProgram, router, isClientReady, type]);
 
   if (!selectedProgram) return null;
 
@@ -40,6 +45,7 @@ const Page = () => {
       duration={selectedProgram?.duration}
       videos={selectedProgram?.videos}
       initialId={selectedProgram?.videos[0]?.id}
+      type={type}
     />
   );
 };
diff --git a/src/app/(plain)/exercise/class/[id]/panel/Header.tsx b/src/app/(plain)/exercise/class/[id]/panel/Header.tsx
index c45d42c..95c7a32 100644
--- a/src/app/(plain)/exercise/class/[id]/panel/Header.tsx
+++ b/src/app/(plain)/exercise/class/[id]/panel/Header.tsx
@@ -5,17 +5,21 @@ import React, { useState } from "react";
 import Timer from "./Timer";
 import useMedia from "@/hooks/useMedia";
 import SenifitDialog from "@/components/SenifitDialog";
+import { WorkoutKind } from "@/types/IRoutine";
+import { getGtmClassType, pushGtmEvent } from "@/utils/gtm";
 
 const Header = ({
   seconds,
   duration,
   onEnd,
   isEnd,
+  type,
 }: {
   duration: number;
   isEnd: boolean;
   onEnd: () => void;
   seconds: number;
+  type: "customized" | "popular" | ["thematic", WorkoutKind] | null;
 }) => {
   const [openDialog, setOpenDialog] = useState(false);
 
@@ -25,6 +29,7 @@ const Header = ({
     if (isEnd) {
       onEnd();
     } else {
+      pushGtmEvent("click_classStop", getGtmClassType(type));
       setOpenDialog(true);
     }
   };
diff --git a/src/app/(plain)/exercise/class/[id]/panel/WorkoutVideoPlayer.tsx b/src/app/(plain)/exercise/class/[id]/panel/WorkoutVideoPlayer.tsx
index 70f97e7..4ecef8e 100644
--- a/src/app/(plain)/exercise/class/[id]/panel/WorkoutVideoPlayer.tsx
+++ b/src/app/(plain)/exercise/class/[id]/panel/WorkoutVideoPlayer.tsx
@@ -11,6 +11,8 @@ import { axiosClient } from "@/apis/axiosClient";
 import { isAuthError } from "@/apis/errors";
 // import { useToastStore } from "@/states/useToastStore";
 import SenifitDialog from "@/components/SenifitDialog";
+import { getGtmClassType, pushGtmEvent } from "@/utils/gtm";
+import { WorkoutKind } from "@/types/IRoutine";
 
 export interface IWorkoutVideo {
   id: number;
@@ -34,6 +36,7 @@ export interface IWorkoutVideoPlaylistProps {
   /** 인덱스 변경 콜백(옵션) */
   onIndexChange?: (index: number, video: IWorkoutVideo) => void;
   duration: number;
+  type: "customized" | "popular" | ["thematic", WorkoutKind] | null;
 }
 
 /** DOM 요소의 실시간 높이를 구하는 훅 */
@@ -68,6 +71,7 @@ export default function WorkoutVideoPlaylist({
   assetBaseUrl,
   onIndexChange,
   duration,
+  type,
 }: IWorkoutVideoPlaylistProps) {
   const { isPhone } = useMedia();
   const router = useRouter();
@@ -160,6 +164,15 @@ export default function WorkoutVideoPlaylist({
     };
   }, [recordId]);
 
+  const progressFired = useRef(false);
+  useEffect(() => {
+    const halfDuration = Math.floor(duration * 30);
+    if (!progressFired.current && seconds >= halfDuration && halfDuration > 0) {
+      pushGtmEvent("click_Progress", getGtmClassType(type));
+      progressFired.current = true;
+    }
+  }, [seconds, duration, type]);
+
   // 이탈 방지 bypass 플래그 (앱 내부 이동 시 사용)
   const shouldBypassUnload = useRef(false);
 
@@ -281,6 +294,7 @@ export default function WorkoutVideoPlaylist({
           isEnd={index === videos.length - 1}
           onEnd={notifyDone}
           seconds={seconds}
+          type={type}
         />
       </Box>
 
diff --git a/src/app/(plain)/login/panel/LoginForm.tsx b/src/app/(plain)/login/panel/LoginForm.tsx
index 15108b2..ff2f84c 100644
--- a/src/app/(plain)/login/panel/LoginForm.tsx
+++ b/src/app/(plain)/login/panel/LoginForm.tsx
@@ -25,6 +25,7 @@ import EyeOffIcon from "@/components/icons/EyeOffIcon";
 import InquiryButton from "@/components/InquiryButton";
 import BackgroundImage from "@/assets/images/login-background.png";
 import { signupGoogleForm } from "@/constants/signupGF";
+import { pushGtmEvent } from "@/utils/gtm";
 
 type LoginFormValues = { id: string; password: string };
 
@@ -57,6 +58,7 @@ export default function LoginForm() {
   const onSubmit = async (data: LoginFormValues) => {
     try {
       await login(data);
+      pushGtmEvent("login_Success");
       setToastOpen({
         message: "로그인 성공! 오늘도 즐거운 시니핏 하세요!",
       });
diff --git a/src/app/(with-container)/(exercise)/exercise/check-selected/panel/Routine.tsx b/src/app/(with-container)/(exercise)/exercise/check-selected/panel/Routine.tsx
index 69a5348..f0de7e7 100644
--- a/src/app/(with-container)/(exercise)/exercise/check-selected/panel/Routine.tsx
+++ b/src/app/(with-container)/(exercise)/exercise/check-selected/panel/Routine.tsx
@@ -14,6 +14,7 @@ import { IRoutineDetail } from "@/types/IRoutineDetail";
 import { Button, Divider, Stack, Typography } from "@mui/material";
 import Link from "next/link";
 import React from "react";
+import { getGtmClassType, pushGtmEvent } from "@/utils/gtm";
 
 const Routine = ({
   type,
@@ -116,7 +117,11 @@ const Routine = ({
           <Typography variant={"Heading1"}>{"이전"}</Typography>
         </Button>
         <Button
-          onClick={() => setOpenModal(true)}
+          id={"click_classStart"}
+          onClick={() => {
+            pushGtmEvent("click_classStart", getGtmClassType(type));
+            setOpenModal(true);
+          }}
           variant={"contained"}
           disableElevation
           sx={{
diff --git a/src/app/(with-container)/(exercise)/exercise/customized/page.tsx b/src/app/(with-container)/(exercise)/exercise/customized/page.tsx
index 473fe08..631d732 100644
--- a/src/app/(with-container)/(exercise)/exercise/customized/page.tsx
+++ b/src/app/(with-container)/(exercise)/exercise/customized/page.tsx
@@ -23,6 +23,7 @@ import { IRoutineDetail } from "@/types/IRoutineDetail";
 import useProgramStore from "@/states/useProgramStore";
 import { useRouter } from "next/navigation";
 import SenifitDialog from "@/components/SenifitDialog";
+import { pushGtmEvent } from "@/utils/gtm";
 
 const Page = () => {
   const [openDialog, setOpenDialog] = useState(false);
@@ -106,6 +107,7 @@ const Page = () => {
           <Stack
             component={"form"}
             onSubmit={handleSubmit(onSubmit, () => {
+              pushGtmEvent("customized_optionError");
               setOpenDialog(true);
             })}
             direction={"column"}
diff --git a/src/app/(with-container)/(exercise)/exercise/done/[id]/page.tsx b/src/app/(with-container)/(exercise)/exercise/done/[id]/page.tsx
index 5dadfc3..dda980a 100644
--- a/src/app/(with-container)/(exercise)/exercise/done/[id]/page.tsx
+++ b/src/app/(with-container)/(exercise)/exercise/done/[id]/page.tsx
@@ -13,6 +13,7 @@ import useMedia from "@/hooks/useMedia";
 import Link from "next/link";
 import { isAuthError } from "@/apis/errors";
 import { useRouter } from "next/navigation";
+import { getGtmClassType, pushGtmEvent } from "@/utils/gtm";
 
 const Page = () => {
   const { id } = useParams();
@@ -23,7 +24,7 @@ const Page = () => {
 
   const searchParams = useSearchParams();
   const seconds = Number(searchParams.get("seconds")) || 0;
-  const { selectedProgram } = useProgramStore();
+  const { selectedProgram, type } = useProgramStore();
 
   const { mutate } = useMutation({
     mutationFn: async () => {
@@ -38,7 +39,10 @@ const Page = () => {
 
   useEffect(() => {
     mutate();
-  }, [mutate]);
+    if (selectedProgram && seconds >= selectedProgram.duration * 60) {
+      pushGtmEvent("click_Finish", getGtmClassType(type));
+    }
+  }, [mutate, selectedProgram, seconds, type]);
 
   return (
     <Stack
@@ -123,6 +127,7 @@ const Page = () => {
         gap={[1.25]}
       >
         <Button
+          id={"click_RecordQuick"}
           component={Link}
           href={`/record/write/${id}`} // 기록 페이지로 이동
           variant={"contained"}
diff --git a/src/app/(with-container)/(exercise)/exercise/panel/VideoInfo.tsx b/src/app/(with-container)/(exercise)/exercise/panel/VideoInfo.tsx
index ac1b492..52e3038 100644
--- a/src/app/(with-container)/(exercise)/exercise/panel/VideoInfo.tsx
+++ b/src/app/(with-container)/(exercise)/exercise/panel/VideoInfo.tsx
@@ -14,6 +14,7 @@ import SenifitDialog from "@/components/SenifitDialog";
 
 interface IVideoInfoProps extends IPopularRoutine {
   onButtonClick: () => void;
+  gtmId?: string;
 }
 
 const VideoInfo = ({
@@ -23,6 +24,7 @@ const VideoInfo = ({
   duration,
   description,
   onButtonClick,
+  gtmId,
 }: IVideoInfoProps) => {
   const [openDialog, setOpenDialog] = useState(false);
 
@@ -111,6 +113,7 @@ const VideoInfo = ({
             )}
 
             <Button
+              id={gtmId}
               onClick={() => setOpenDialog(true)}
               fullWidth
               disableElevation
diff --git a/src/app/(with-container)/(exercise)/exercise/popular/page.tsx b/src/app/(with-container)/(exercise)/exercise/popular/page.tsx
index dd32085..add4d57 100644
--- a/src/app/(with-container)/(exercise)/exercise/popular/page.tsx
+++ b/src/app/(with-container)/(exercise)/exercise/popular/page.tsx
@@ -57,6 +57,7 @@ const Page = () => {
             <VideoInfo
               key={routine.id}
               {...routine}
+              gtmId={`popular_Select${routine.duration}`}
               onButtonClick={() => {
                 setType("popular");
                 setSelectedRoutineRecord({
diff --git a/src/app/(with-container)/(exercise)/panel/CustomizedRoutine.tsx b/src/app/(with-container)/(exercise)/panel/CustomizedRoutine.tsx
index 9af5a49..ffe45b0 100644
--- a/src/app/(with-container)/(exercise)/panel/CustomizedRoutine.tsx
+++ b/src/app/(with-container)/(exercise)/panel/CustomizedRoutine.tsx
@@ -12,6 +12,7 @@ const CustomizedRoutine = ({ authenticated }: { authenticated: boolean }) => {
   const { isPhone } = useMedia();
   return (
     <Button
+      id={"click_Customized"}
       component={Link}
       href={
         authenticated
diff --git a/src/app/(with-container)/(exercise)/panel/PopularRoutine.tsx b/src/app/(with-container)/(exercise)/panel/PopularRoutine.tsx
index 72532ab..91dc1bb 100644
--- a/src/app/(with-container)/(exercise)/panel/PopularRoutine.tsx
+++ b/src/app/(with-container)/(exercise)/panel/PopularRoutine.tsx
@@ -22,6 +22,7 @@ const PopularRoutine = ({ authenticated }: { authenticated: boolean }) => {
 
   return (
     <Button
+      id={"popular_Click"}
       fullWidth
       component={Link}
       href={
diff --git a/src/app/(with-container)/(exercise)/panel/ThematicRoutine.tsx b/src/app/(with-container)/(exercise)/panel/ThematicRoutine.tsx
index 549b916..39bb152 100644
--- a/src/app/(with-container)/(exercise)/panel/ThematicRoutine.tsx
+++ b/src/app/(with-container)/(exercise)/panel/ThematicRoutine.tsx
@@ -10,6 +10,7 @@ const ThematicRoutine = ({ authenticated }: { authenticated: boolean }) => {
   const { isPhone } = useMedia();
   return (
     <Button
+      id={"Click_Topic"}
       fullWidth
       component={Link}
       href={
diff --git a/src/components/Carousel.tsx b/src/components/Carousel.tsx
index 2123bb2..e331677 100644
--- a/src/components/Carousel.tsx
+++ b/src/components/Carousel.tsx
@@ -48,6 +48,7 @@ const Carousel = <T,>({
     <Box ref={containerRef} sx={{ position: "relative", overflow: "hidden" }}>
       {/* 이전 버튼 */}
       <IconButton
+        id={"click_click_Carousel"}
         sx={{
           ...iconButtonStyle,
           left: "1rem",
@@ -64,6 +65,7 @@ const Carousel = <T,>({
 
       {/* 다음 버튼 */}
       <IconButton
+        id={"click_click_Carousel"}
         sx={{
           ...iconButtonStyle,
           right: "1rem",
diff --git a/src/utils/gtm.ts b/src/utils/gtm.ts
new file mode 100644
index 0000000..b3d8671
--- /dev/null
+++ b/src/utils/gtm.ts
@@ -0,0 +1,45 @@
+export type GTM_EVENT_TYPE =
+  | "click_classStart"
+  | "click_Start"
+  | "click_Progress"
+  | "click_classStop"
+  | "click_Finish"
+  | "record_Finish"
+  | "login_Success"
+  | "customized_optionError";
+
+interface GtmPayload {
+  event: GTM_EVENT_TYPE;
+  classType?: string;
+}
+
+declare global {
+  interface Window {
+    dataLayer: GtmPayload[];
+  }
+}
+
+/**
+ * GTM dataLayer에 이벤트를 전송합니다.
+ * @param event 이벤트 명칭
+ * @param classType 클래스 유형 ("맞춤형", "인기", "주제별")
+ */
+export const pushGtmEvent = (event: GTM_EVENT_TYPE, classType?: string) => {
+  if (typeof window === "undefined") return;
+
+  window.dataLayer = window.dataLayer || [];
+
+  const payload: GtmPayload = { event };
+  if (classType) {
+    payload.classType = classType;
+  }
+
+  window.dataLayer.push(payload);
+};
+
+export const getGtmClassType = (type: unknown) => {
+  if (type === "customized") return "맞춤형";
+  if (type === "popular") return "인기";
+  if (Array.isArray(type) && type[0] === "thematic") return "주제별";
+  return undefined;
+};