diff --git a/src/main/java/com/project/domain/admin/controller/AdminController.java b/src/main/java/com/project/domain/admin/controller/AdminController.java
index 9d28a9de..1b27ed52 100644
--- a/src/main/java/com/project/domain/admin/controller/AdminController.java
+++ b/src/main/java/com/project/domain/admin/controller/AdminController.java
@@ -2,10 +2,12 @@
 
 import jakarta.validation.Valid;
 
+import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestController;
 
 import com.project.common.api.response.ApiResponse;
@@ -47,10 +49,11 @@ public ApiResponse<SignInResponse> signIn(
     }
 
     @PostMapping("/signup")
+    @ResponseStatus(HttpStatus.CREATED)
     @Operation(summary = "관리자 회원가입", description = "관리자 이메일/비밀번호로 회원가입합니다.")
     public ApiResponse<SignUpResponse> signUp(
             @Valid @RequestBody AdminSignInRequest signInRequest) {
-        return ApiResponse.success(
+        return ApiResponse.created(
                 adminService.signUp(signInRequest.email(), signInRequest.password()));
     }
 
diff --git a/src/main/java/com/project/domain/appeal/controller/AppealController.java b/src/main/java/com/project/domain/appeal/controller/AppealController.java
index 0a46e2d2..693a3d68 100644
--- a/src/main/java/com/project/domain/appeal/controller/AppealController.java
+++ b/src/main/java/com/project/domain/appeal/controller/AppealController.java
@@ -4,6 +4,7 @@
 import jakarta.validation.constraints.Max;
 import jakarta.validation.constraints.Min;
 
+import org.springframework.http.HttpStatus;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PatchMapping;
@@ -12,6 +13,7 @@
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestController;
 
 import com.project.common.api.response.ApiResponse;
@@ -97,6 +99,7 @@ public ApiResponse<AppealDetailResponse> getAppealDetail(
 
     /** 이의제기 생성 처리 */
     @PostMapping
+    @ResponseStatus(HttpStatus.CREATED)
     @Operation(summary = "이의제기 생성")
     public ApiResponse<AppealCreateResponse> createAppeal(
             @Parameter(hidden = true) @CustomerId Long customerId,
@@ -121,6 +124,7 @@ public ApiResponse<AppealRespondResponse> respondAppeal(
 
     /** 이의제기 댓글 작성 처리 */
     @PostMapping("/{appealId}/comments")
+    @ResponseStatus(HttpStatus.CREATED)
     @Operation(summary = "이의제기 댓글 작성")
     public ApiResponse<AppealCommentResponse> createComment(
             @Parameter(hidden = true) @CustomerId Long customerId,
@@ -143,6 +147,7 @@ public ApiResponse<AppealCancelResponse> cancelAppeal(
 
     /** 긴급 쿼터 요청 처리 */
     @PostMapping("/emergency")
+    @ResponseStatus(HttpStatus.CREATED)
     @Operation(summary = "긴급 쿼터 요청")
     public ApiResponse<EmergencyQuotaResponse> requestEmergencyQuota(
             @Parameter(hidden = true) @CustomerId Long customerId,
diff --git a/src/main/java/com/project/domain/customer/controller/CustomerController.java b/src/main/java/com/project/domain/customer/controller/CustomerController.java
index 259c086e..a6489da8 100644
--- a/src/main/java/com/project/domain/customer/controller/CustomerController.java
+++ b/src/main/java/com/project/domain/customer/controller/CustomerController.java
@@ -2,11 +2,13 @@
 
 import jakarta.validation.Valid;
 
+import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestController;
 
 import com.project.common.api.response.ApiResponse;
@@ -48,10 +50,11 @@ public ApiResponse<SignInResponse> signIn(
     }
 
     @PostMapping("/signup")
+    @ResponseStatus(HttpStatus.CREATED)
     @Operation(summary = "사용자 회원가입", description = "사용자 이메일/비밀번호로 회원가입합니다.")
     public ApiResponse<SignUpResponse> signUp(
             @Valid @RequestBody CustomerSignUpRequest requestDto) {
-        return ApiResponse.success(customerService.signUp(requestDto));
+        return ApiResponse.created(customerService.signUp(requestDto));
     }
 
     @PostMapping("/refresh")
diff --git a/src/main/java/com/project/domain/mission/controller/MissionController.java b/src/main/java/com/project/domain/mission/controller/MissionController.java
index 1546ce5c..1ce9af5a 100644
--- a/src/main/java/com/project/domain/mission/controller/MissionController.java
+++ b/src/main/java/com/project/domain/mission/controller/MissionController.java
@@ -4,6 +4,7 @@
 import jakarta.validation.constraints.Max;
 import jakarta.validation.constraints.Min;
 
+import org.springframework.http.HttpStatus;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
@@ -12,6 +13,7 @@
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestController;
 
 import com.project.common.api.response.ApiResponse;
@@ -89,6 +91,7 @@ public ApiResponse<MissionRequestHistoryListResponse> getMissionRequestHistory(
     /** OWNER가 미션을 생성한다. */
     @OwnerOnly
     @PostMapping
+    @ResponseStatus(HttpStatus.CREATED)
     @Operation(summary = "미션 생성")
     public ApiResponse<CreateMissionResponse> createMission(
             @Parameter(hidden = true) @CustomerId Long customerId,
@@ -111,11 +114,12 @@ public ApiResponse<Void> cancelMission(
 
     /** MEMBER가 본인 미션 완료 요청을 생성한다. */
     @PostMapping("/{missionId}/request")
+    @ResponseStatus(HttpStatus.CREATED)
     @Operation(summary = "미션 완료 요청")
     public ApiResponse<MissionRequestResponse> requestMissionApproval(
             @Parameter(hidden = true) @CustomerId Long customerId, @PathVariable Long missionId) {
         AuthContext auth = authContextService.resolve(customerId);
         MissionRequestResult result = missionService.requestMissionApproval(auth, missionId);
-        return ApiResponse.success(MissionRequestResponse.from(result));
+        return ApiResponse.created(MissionRequestResponse.from(result));
     }
 }
diff --git a/src/main/java/com/project/domain/policy/controller/PolicyController.java b/src/main/java/com/project/domain/policy/controller/PolicyController.java
index b25fb179..e2ead07d 100644
--- a/src/main/java/com/project/domain/policy/controller/PolicyController.java
+++ b/src/main/java/com/project/domain/policy/controller/PolicyController.java
@@ -5,6 +5,7 @@
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.web.PageableDefault;
+import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -12,6 +13,7 @@
 import org.springframework.web.bind.annotation.PutMapping;
 import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestController;
 
 import com.fasterxml.jackson.core.JsonProcessingException;
@@ -56,11 +58,12 @@ public ApiResponse<PolicyResponse.ListResult> getPolicyList(
 
     @PostMapping
     @AdminOnly
+    @ResponseStatus(HttpStatus.CREATED)
     @Operation(summary = "정책 생성", description = "새로운 정책 템플릿을 생성합니다.")
     public ApiResponse<PolicyResponse.Create> createPolicy(
             @Valid @RequestBody PolicyRequest.Create policyRequest) {
         Policy policy = policyService.createPolicy(policyRequest);
-        return ApiResponse.success(PolicyResponse.Create.from(policy));
+        return ApiResponse.created(PolicyResponse.Create.from(policy));
     }
 
     @PutMapping("/{policyId}")
diff --git a/src/main/java/com/project/domain/reward/controller/AdminRewardTemplateController.java b/src/main/java/com/project/domain/reward/controller/AdminRewardTemplateController.java
index 2cdcaaaa..1b685524 100644
--- a/src/main/java/com/project/domain/reward/controller/AdminRewardTemplateController.java
+++ b/src/main/java/com/project/domain/reward/controller/AdminRewardTemplateController.java
@@ -78,7 +78,6 @@ public ApiResponse<RewardTemplateResponse.Detail> updateTemplate(
 
     @DeleteMapping("/{id}")
     @AdminOnly
-    @ResponseStatus(HttpStatus.NO_CONTENT)
     @Operation(summary = "보상 템플릿 삭제", description = "보상 템플릿을 삭제합니다. (Soft Delete)")
     public ApiResponse<Void> deleteTemplate(
             @Parameter(description = "보상 템플릿 ID", required = true) @PathVariable("id") Long id) {
diff --git a/src/test/java/com/project/domain/mission/controller/MissionControllerIntegrationTest.java b/src/test/java/com/project/domain/mission/controller/MissionControllerIntegrationTest.java
index c00b502b..82388f0d 100644
--- a/src/test/java/com/project/domain/mission/controller/MissionControllerIntegrationTest.java
+++ b/src/test/java/com/project/domain/mission/controller/MissionControllerIntegrationTest.java
@@ -178,7 +178,7 @@ void missionFlowKeepsRewardShape() throws Exception {
                                         .header("Authorization", "Bearer " + OWNER_TOKEN)
                                         .contentType(MediaType.APPLICATION_JSON)
                                         .content(createBody))
-                        .andExpect(status().isOk())
+                        .andExpect(status().isCreated())
                         .andReturn();
         Long createdMissionId =
                 objectMapper
@@ -192,7 +192,7 @@ void missionFlowKeepsRewardShape() throws Exception {
                 mockMvc.perform(
                                 post("/missions/{missionId}/request", mission.getId())
                                         .header("Authorization", "Bearer " + MEMBER_TOKEN))
-                        .andExpect(status().isOk())
+                        .andExpect(status().isCreated())
                         .andReturn();
         JsonNode requestData =
                 objectMapper
diff --git a/src/test/java/com/project/domain/reward/controller/RewardControllerIntegrationTest.java b/src/test/java/com/project/domain/reward/controller/RewardControllerIntegrationTest.java
index c235503d..5f40507d 100644
--- a/src/test/java/com/project/domain/reward/controller/RewardControllerIntegrationTest.java
+++ b/src/test/java/com/project/domain/reward/controller/RewardControllerIntegrationTest.java
@@ -162,7 +162,7 @@ void rewardFlowKeepsRewardShape() throws Exception {
                 mockMvc.perform(
                                 post("/missions/{missionId}/request", mission.getId())
                                         .header("Authorization", "Bearer " + MEMBER_TOKEN))
-                        .andExpect(status().isOk())
+                        .andExpect(status().isCreated())
                         .andReturn();
         Long requestId =
                 objectMapper