diff --git a/src/main/java/com/daytodo/domain/course/entity/Course.java b/src/main/java/com/daytodo/domain/course/entity/Course.java
index b5eb975..b4cb6ee 100644
--- a/src/main/java/com/daytodo/domain/course/entity/Course.java
+++ b/src/main/java/com/daytodo/domain/course/entity/Course.java
@@ -83,6 +83,11 @@ public Course(
         this.courseStatus = CourseStatus.PLANNING;
     }
 
+    // 코스 시작 (계획 중 -> 진행 중). courseDate 가 도래해 투데이 조회 시점에 승격된다.
+    public void start() {
+        this.courseStatus = CourseStatus.IN_PROGRESS;
+    }
+
     // 코스 종료
     public void complete() {
         this.courseStatus = CourseStatus.COMPLETED;
diff --git a/src/main/java/com/daytodo/domain/course/repository/CourseRepository.java b/src/main/java/com/daytodo/domain/course/repository/CourseRepository.java
index ad2aef3..456a978 100644
--- a/src/main/java/com/daytodo/domain/course/repository/CourseRepository.java
+++ b/src/main/java/com/daytodo/domain/course/repository/CourseRepository.java
@@ -11,6 +11,7 @@
 import org.springframework.data.repository.query.Param;
 
 import java.time.LocalDate;
+import java.util.Collection;
 import java.util.List;
 import java.util.Optional;
 
@@ -38,7 +39,8 @@ List<Course> findAllByOwnerIdAndCourseDateBetweenOrderByCreatedAtDesc(
 
     /*
      * 투데이 코스 조회
-     * 사용자가 참여 중인 코스 중 해당 날짜의 진행 중 코스를 조회한다.
+     * 사용자가 참여 중인 코스 중 해당 날짜의 코스를 조회한다.
+     * PLANNING 은 조회 시점에 IN_PROGRESS 로 승격되므로 두 상태를 모두 대상으로 한다.
      * 이론상 1건이지만 데이터 이상으로 여러 건일 수 있어 최근 생성 순으로 정렬해 첫 건을 사용한다.
      */
     @Query("""
@@ -46,13 +48,13 @@ List<Course> findAllByOwnerIdAndCourseDateBetweenOrderByCreatedAtDesc(
             where cm.user.id = :userId
               and cm.memberStatus = :memberStatus
               and cm.course.courseDate = :courseDate
-              and cm.course.courseStatus = :courseStatus
+              and cm.course.courseStatus in :courseStatuses
             order by cm.course.createdAt desc, cm.course.courseId desc
             """)
-    List<Course> findMemberCoursesByDateAndStatus(
+    List<Course> findMemberCoursesByDateAndStatuses(
             @Param("userId") Long userId,
             @Param("courseDate") LocalDate courseDate,
-            @Param("courseStatus") CourseStatus courseStatus,
+            @Param("courseStatuses") Collection<CourseStatus> courseStatuses,
             @Param("memberStatus") MemberStatus memberStatus
     );
 
diff --git a/src/main/java/com/daytodo/domain/course/service/CourseService.java b/src/main/java/com/daytodo/domain/course/service/CourseService.java
index bbcc534..49200dd 100644
--- a/src/main/java/com/daytodo/domain/course/service/CourseService.java
+++ b/src/main/java/com/daytodo/domain/course/service/CourseService.java
@@ -66,14 +66,20 @@ public class CourseService {
     private final RecommendationLikeRepository recommendationLikeRepository;
     private final PlaceRepository placeRepository;
     private final RecommendationCommentRepository recommendationCommentRepository;
+    private final TodayCoursePromoter todayCoursePromoter;
 
     private final Clock clock;
 
+    // 진행중 목록/배너가 IN_PROGRESS 상태에 의존하므로, 조회 전에 오늘 날짜의
+    // PLANNING 코스를 IN_PROGRESS 로 승격시킨다(투데이 조회와 동일 규칙). 쓰기 발생.
+    @Transactional
     public CourseResponse.Courses getCourses(Long userId, LocalDate startDate, LocalDate endDate) {
         userService.getActiveUser(userId);
         validatePeriod(startDate, endDate);
         LocalDate today = LocalDate.now(clock);
 
+        todayCoursePromoter.promoteDueCourses(userId, today);
+
         List<Course> inProgress = courseRepository.findMemberCoursesByStatus(
                 userId, MemberStatus.JOINED, CourseStatus.IN_PROGRESS
         );
diff --git a/src/main/java/com/daytodo/domain/course/service/TodayCoursePromoter.java b/src/main/java/com/daytodo/domain/course/service/TodayCoursePromoter.java
new file mode 100644
index 0000000..d9ea21a
--- /dev/null
+++ b/src/main/java/com/daytodo/domain/course/service/TodayCoursePromoter.java
@@ -0,0 +1,39 @@
+package com.daytodo.domain.course.service;
+
+import com.daytodo.domain.course.entity.Course;
+import com.daytodo.domain.course.enums.CourseStatus;
+import com.daytodo.domain.course.enums.MemberStatus;
+import com.daytodo.domain.course.repository.CourseRepository;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.time.LocalDate;
+import java.util.List;
+
+/**
+ * 코스 상태 지연 전환 헬퍼.
+ * 별도 스케줄러가 없으므로, courseDate 가 도래한 PLANNING 코스를
+ * 홈/투데이 조회 진입 시점에 IN_PROGRESS 로 승격시킨다.
+ * 두 조회 경로가 같은 규칙을 쓰도록 승격 로직을 한곳에 모은다.
+ */
+@Component
+@RequiredArgsConstructor
+public class TodayCoursePromoter {
+
+    private final CourseRepository courseRepository;
+
+    /**
+     * 사용자가 참여 중인 코스 중 courseDate 가 today 인 PLANNING 코스를 IN_PROGRESS 로 승격.
+     * 호출 측 트랜잭션에 합류하며(REQUIRED), 변경 감지로 커밋 시 반영된다.
+     */
+    @Transactional
+    public void promoteDueCourses(Long userId, LocalDate today) {
+        courseRepository.findMemberCoursesByDateAndStatuses(
+                userId,
+                today,
+                List.of(CourseStatus.PLANNING),
+                MemberStatus.JOINED
+        ).forEach(Course::start);
+    }
+}
diff --git a/src/main/java/com/daytodo/domain/course/service/TodayCourseService.java b/src/main/java/com/daytodo/domain/course/service/TodayCourseService.java
index 307e072..ab1ae01 100644
--- a/src/main/java/com/daytodo/domain/course/service/TodayCourseService.java
+++ b/src/main/java/com/daytodo/domain/course/service/TodayCourseService.java
@@ -20,6 +20,7 @@
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
+import java.time.Clock;
 import java.time.LocalDate;
 import java.util.HashMap;
 import java.util.List;
@@ -35,17 +36,24 @@ public class TodayCourseService {
     private final CourseMemberRepository courseMemberRepository;
     private final CoursePlaceRepository coursePlaceRepository;
     private final MemoryPhotoRepository memoryPhotoRepository;
+    private final TodayCoursePromoter todayCoursePromoter;
+    private final Clock clock;
 
     /*
      * 투데이 코스 조회
-     * 오늘 진행 중인 코스가 없으면 예외가 아니라 todayCourse: null 로 응답한다.
+     * 오늘 날짜의 코스가 없으면 예외가 아니라 todayCourse: null 로 응답한다.
+     * 별도의 상태 전이 스케줄러가 없으므로, 조회 진입 시점에 오늘 날짜의 PLANNING
+     * 코스를 IN_PROGRESS 로 승격시킨다(홈/투데이 공용 규칙).
      */
-    @Transactional(readOnly = true)
+    @Transactional
     public TodayCourseResponse.GetTodayCourse getTodayCourse(Long userId) {
-        Optional<Course> todayCourse = courseRepository.findMemberCoursesByDateAndStatus(
+        LocalDate today = LocalDate.now(clock);
+        todayCoursePromoter.promoteDueCourses(userId, today);
+
+        Optional<Course> todayCourse = courseRepository.findMemberCoursesByDateAndStatuses(
                 userId,
-                LocalDate.now(),
-                CourseStatus.IN_PROGRESS,
+                today,
+                List.of(CourseStatus.IN_PROGRESS),
                 MemberStatus.JOINED
         ).stream().findFirst();
 
diff --git a/src/test/java/com/daytodo/domain/course/repository/CourseQueryValidationTest.java b/src/test/java/com/daytodo/domain/course/repository/CourseQueryValidationTest.java
index 901a122..161bef5 100644
--- a/src/test/java/com/daytodo/domain/course/repository/CourseQueryValidationTest.java
+++ b/src/test/java/com/daytodo/domain/course/repository/CourseQueryValidationTest.java
@@ -28,8 +28,10 @@ class CourseQueryValidationTest {
     @Test
     @DisplayName("투데이 코스 관련 JPQL이 정상적으로 실행된다")
     void queriesRun() {
-        assertThat(courseRepository.findMemberCoursesByDateAndStatus(
-                1L, LocalDate.now(), CourseStatus.IN_PROGRESS, MemberStatus.JOINED
+        assertThat(courseRepository.findMemberCoursesByDateAndStatuses(
+                1L, LocalDate.now(),
+                java.util.List.of(CourseStatus.PLANNING, CourseStatus.IN_PROGRESS),
+                MemberStatus.JOINED
         )).isEmpty();
 
         assertThat(courseMemberRepository.findMembersByCourseId(1L, MemberStatus.JOINED)).isEmpty();
diff --git a/src/test/java/com/daytodo/domain/course/service/CourseServiceTest.java b/src/test/java/com/daytodo/domain/course/service/CourseServiceTest.java
index 6fb92bd..1e34b5e 100644
--- a/src/test/java/com/daytodo/domain/course/service/CourseServiceTest.java
+++ b/src/test/java/com/daytodo/domain/course/service/CourseServiceTest.java
@@ -70,6 +70,7 @@ class CourseServiceTest {
     @Mock RecommendationLikeRepository recommendationLikeRepository;
     @Mock PlaceRepository placeRepository;
     @Mock RecommendationCommentRepository recommendationCommentRepository;
+    @Mock TodayCoursePromoter todayCoursePromoter;
 
     CourseService courseService;
     User user;
@@ -88,6 +89,7 @@ void setUp() {
                 recommendationLikeRepository,
                 placeRepository,
                 recommendationCommentRepository,
+                todayCoursePromoter,
                 CLOCK
         );
         user = new User("user@example.com", "password", "user", null, LoginType.LOCAL);