diff --git a/src/main/java/org/sopt/confeti/api/auth/dto/request/OnboardRequest.java b/src/main/java/org/sopt/confeti/api/auth/dto/request/OnboardRequest.java
index 00a32c90..5623b755 100644
--- a/src/main/java/org/sopt/confeti/api/auth/dto/request/OnboardRequest.java
+++ b/src/main/java/org/sopt/confeti/api/auth/dto/request/OnboardRequest.java
@@ -2,7 +2,9 @@
 
 import java.util.List;
 
+@Deprecated
 public record OnboardRequest(
-        List<OnboardArtistRequest> favoriteArtists
+    List<OnboardArtistRequest> favoriteArtists
 ) {
+
 }
diff --git a/src/main/java/org/sopt/confeti/api/auth/facade/AuthFacade.java b/src/main/java/org/sopt/confeti/api/auth/facade/AuthFacade.java
index ddf7c941..94b7af36 100644
--- a/src/main/java/org/sopt/confeti/api/auth/facade/AuthFacade.java
+++ b/src/main/java/org/sopt/confeti/api/auth/facade/AuthFacade.java
@@ -68,12 +68,13 @@ public void logout(Long userId) {
         logoutService.logout(userId);
     }
 
+    @Deprecated
     @Transactional
     public void onboard(long userId, OnboardDTO onboardDTO) {
         User user = userService.findById(userId);
         Set<String> favoriteArtistIds = onboardDTO.favoriteArtists().stream()
-                .map(OnboardArtistDTO::artistId)
-                .collect(Collectors.toSet());
+            .map(OnboardArtistDTO::artistId)
+            .collect(Collectors.toSet());
 
         onboardService.validateFavoriteArtistCount(favoriteArtistIds);
         artistFavoriteService.addFavorites(user, favoriteArtistIds);
@@ -81,7 +82,7 @@ public void onboard(long userId, OnboardDTO onboardDTO) {
     }
 
     public void flushCachedTopArtists(long userId) {
-        userOnboardService.flushCachedTopArtists(userId);
+        userOnboardService.flushCachedOnboardArtists(userId);
     }
 
     @Transactional
diff --git a/src/main/java/org/sopt/confeti/api/user/controller/UserOnboardControllerV4.java b/src/main/java/org/sopt/confeti/api/user/controller/UserOnboardControllerV4.java
index 27bc6c77..91842fae 100644
--- a/src/main/java/org/sopt/confeti/api/user/controller/UserOnboardControllerV4.java
+++ b/src/main/java/org/sopt/confeti/api/user/controller/UserOnboardControllerV4.java
@@ -118,6 +118,19 @@ public ResponseEntity<BaseResponse<UserOnboardFavoriteArtistsResponse>> getFavor
             UserOnboardFavoriteArtistsResponse.from(favoriteArtists));
     }
 
+    /**
+     * 개발을 위해 임시로 Role.GENERAL 접근 허용
+     */
+    @Permission(role = {Role.ONBOARDING, Role.GENERAL})
+    @PostMapping()
+    public ResponseEntity<BaseResponse<Void>> onboard(
+        @UserId Long userId
+    ) {
+        userOnboardFacade.onboard(userId);
+        userOnboardFacade.flushCachedOnboardArtists(userId);
+        return ApiResponseUtil.success(SuccessMessage.SUCCESS);
+    }
+
     /**
      * 개발을 위해 임시로 Role.GENERAL 접근 허용
      */
diff --git a/src/main/java/org/sopt/confeti/api/user/controller/docs/UserOnboardControllerV4Docs.java b/src/main/java/org/sopt/confeti/api/user/controller/docs/UserOnboardControllerV4Docs.java
index 86bb2c41..0a0fcb52 100644
--- a/src/main/java/org/sopt/confeti/api/user/controller/docs/UserOnboardControllerV4Docs.java
+++ b/src/main/java/org/sopt/confeti/api/user/controller/docs/UserOnboardControllerV4Docs.java
@@ -6,6 +6,7 @@
 import io.swagger.v3.oas.annotations.tags.Tag;
 import org.sopt.confeti.api.user.dto.request.PatchOnboardFavoriteArtistsRequest;
 import org.sopt.confeti.api.user.dto.response.onboard.UserOnboardFavoriteArtistsResponse;
+import org.sopt.confeti.global.annotation.UserId;
 import org.sopt.confeti.global.common.BaseResponse;
 import org.sopt.confeti.global.common.swagger.AuthErrorResponses;
 import org.sopt.confeti.global.common.swagger.CommonErrorResponses;
@@ -29,6 +30,29 @@ ResponseEntity<BaseResponse<UserOnboardFavoriteArtistsResponse>> getFavoriteArti
         Long userId
     );
 
+    @Operation(
+        summary = "회원가입한 유저의 온보딩 완료 요청",
+        description =
+            """
+                V4 변경사항
+                - RequestBody 로 favoriteArtistId 목록을 받아서 처리하던 부분이 사라짐
+                - 서버에서 내부적으로 온보딩 시 사용된 favoriteArtistId 를 관리하므로 해당 데이터를 사용해 온보딩 완료 로직을 진행함
+                """
+    )
+    @ApiResponses(
+        value = {
+            @ApiResponse(
+                responseCode = "200",
+                description = "성공"
+            )
+        }
+    )
+    @CommonErrorResponses
+    @AuthErrorResponses
+    ResponseEntity<BaseResponse<Void>> onboard(
+        @UserId Long userId
+    );
+
     @Operation(
         summary = "온보딩 진행 중 favorite 으로 선택했던 아티스트 목록 수정",
         description =
diff --git a/src/main/java/org/sopt/confeti/api/user/facade/UserOnboardFacade.java b/src/main/java/org/sopt/confeti/api/user/facade/UserOnboardFacade.java
index 3a42aef5..00d09202 100644
--- a/src/main/java/org/sopt/confeti/api/user/facade/UserOnboardFacade.java
+++ b/src/main/java/org/sopt/confeti/api/user/facade/UserOnboardFacade.java
@@ -16,10 +16,13 @@
 import org.sopt.confeti.api.user.facade.dto.response.onboard.UserOnboardCacheDTO;
 import org.sopt.confeti.api.user.facade.dto.response.onboard.UserOnboardFavoriteArtistsDTO;
 import org.sopt.confeti.api.user.facade.dto.response.onboard.UserOnboardRelatedArtistsDTO;
+import org.sopt.confeti.domain.artist_favorite.application.ArtistFavoriteService;
+import org.sopt.confeti.domain.user.User;
 import org.sopt.confeti.domain.user.application.UserOnboardService;
 import org.sopt.confeti.domain.user.application.UserService;
 import org.sopt.confeti.domain.user.constant.Role;
 import org.sopt.confeti.global.annotation.Facade;
+import org.sopt.confeti.global.exception.BadRequestException;
 import org.sopt.confeti.global.exception.NotFoundException;
 import org.sopt.confeti.global.message.ErrorMessage;
 import org.sopt.confeti.global.resolver.music_api.artist.vo.ConfetiArtist;
@@ -45,6 +48,7 @@ public class UserOnboardFacade {
     private final UserOnboardService userOnboardService;
     private final RedisTemplate<String, Object> redisTemplate;
     private final ObjectMapper objectMapper;
+    private final ArtistFavoriteService artistFavoriteService;
 
     public UserOnboardRelatedArtistsDTO getArtistsRelatedTerm(long userId, String term, int limit) {
         Set<String> topArtistIds = userOnboardService.getCachedExposedArtistIds(userId);
@@ -150,6 +154,22 @@ public UserOnboardFavoriteArtistsDTO getFavoriteArtists(long userId) {
         return UserOnboardFavoriteArtistsDTO.from(favoriteArtists);
     }
 
+    @Transactional
+    public void onboard(long userId) {
+        UserOnboardCacheDTO cachedArtists = userOnboardService.getCachedArtists(userId);
+        validOnboardArtists(cachedArtists);
+
+        Set<String> favoriteArtistIds = cachedArtists.favoriteArtistIds();
+        User user = userService.findById(userId);
+
+        artistFavoriteService.addFavorites(user, favoriteArtistIds);
+        user.setRole(Role.GENERAL);
+    }
+
+    public void flushCachedOnboardArtists(long userId) {
+        userOnboardService.flushCachedOnboardArtists(userId);
+    }
+
     public void cacheTopArtists(List<ConfetiArtist> topArtists) {
         redisTemplate.opsForValue().set(RedisKey.MUSIC_TOP_ARTISTS.get(), topArtists);
     }
@@ -219,4 +239,12 @@ private void cacheRelatedArtists(
             UserOnboardCacheDTO.of(newFavoriteArtistIds, newExposedArtistIds));
     }
 
+    private void validOnboardArtists(UserOnboardCacheDTO userOnboardCacheDTO) {
+        Set<String> favoriteArtistIds = userOnboardCacheDTO.favoriteArtistIds();
+
+        if (favoriteArtistIds == null || favoriteArtistIds.isEmpty()) {
+            throw new BadRequestException(ErrorMessage.BAD_REQUEST);
+        }
+    }
+
 }
diff --git a/src/main/java/org/sopt/confeti/domain/user/application/UserOnboardService.java b/src/main/java/org/sopt/confeti/domain/user/application/UserOnboardService.java
index 882a3498..7a99b172 100644
--- a/src/main/java/org/sopt/confeti/domain/user/application/UserOnboardService.java
+++ b/src/main/java/org/sopt/confeti/domain/user/application/UserOnboardService.java
@@ -52,7 +52,7 @@ public void cacheOnboardArtists(long userId, UserOnboardCacheDTO artistsDTO) {
             .set(generateRedisKey(userId), artistsDTO, REDIS_TTL_DAY, TimeUnit.DAYS);
     }
 
-    public void flushCachedTopArtists(long userId) {
+    public void flushCachedOnboardArtists(long userId) {
         redisTemplate.delete(generateRedisKey(userId));
     }
 }
diff --git a/src/main/java/org/sopt/confeti/global/exception/BadRequestException.java b/src/main/java/org/sopt/confeti/global/exception/BadRequestException.java
new file mode 100644
index 00000000..9bbb9f31
--- /dev/null
+++ b/src/main/java/org/sopt/confeti/global/exception/BadRequestException.java
@@ -0,0 +1,10 @@
+package org.sopt.confeti.global.exception;
+
+import org.sopt.confeti.global.message.ErrorMessage;
+
+public class BadRequestException extends ConfetiException {
+
+    public BadRequestException(ErrorMessage message) {
+        super(message);
+    }
+}
diff --git a/src/main/java/org/sopt/confeti/global/exception/GlobalExceptionHandler.java b/src/main/java/org/sopt/confeti/global/exception/GlobalExceptionHandler.java
index ce3778b2..23d951b3 100644
--- a/src/main/java/org/sopt/confeti/global/exception/GlobalExceptionHandler.java
+++ b/src/main/java/org/sopt/confeti/global/exception/GlobalExceptionHandler.java
@@ -12,6 +12,13 @@
 @RestControllerAdvice
 public class GlobalExceptionHandler {
 
+    @ExceptionHandler(BadRequestException.class)
+    public ResponseEntity<BaseResponse<Void>> handleIllegalArgumentException(
+        BadRequestException e, HttpServletRequest request) {
+        request.setAttribute("exception", e);
+        return ApiResponseUtil.failure(ErrorMessage.BAD_REQUEST);
+    }
+
     @ExceptionHandler(IllegalArgumentException.class)
     public ResponseEntity<BaseResponse<Void>> handleIllegalArgumentException(
         IllegalArgumentException e, HttpServletRequest request) {