diff --git a/apps/server/src/rooms/room-inspections.service.ts b/apps/server/src/rooms/room-inspections.service.ts
index 5226b55..5283499 100644
--- a/apps/server/src/rooms/room-inspections.service.ts
+++ b/apps/server/src/rooms/room-inspections.service.ts
@@ -1,13 +1,14 @@
 import { BadRequestException, Injectable, Logger, OnApplicationBootstrap } from '@nestjs/common';
 import { Cron } from '@nestjs/schedule';
 import { InjectRepository } from '@nestjs/typeorm';
-import { DataSource, EntityManager, IsNull, LessThanOrEqual, MoreThanOrEqual, Repository } from 'typeorm';
+import { DataSource, EntityManager, Repository } from 'typeorm';
 import { Bed } from '../entities/bed.entity';
 import { Occupancy } from '../entities/occupancy.entity';
 import { Room } from '../entities/room.entity';
 import { RoomInspection } from '../entities/room-inspection.entity';
 import { RoomInspectionDetail } from '../entities/room-inspection-detail.entity';
 import { OperationLogsService } from '../operation-logs/operation-logs.service';
+import { occupancyWhereOnDate } from './room-occupancy-date';
 
 interface InspectorIdentity {
   id?: number;
@@ -211,10 +212,7 @@ export class RoomInspectionsService implements OnApplicationBootstrap {
 
   private findOccupanciesForDate(manager: EntityManager, roomId: number, date: string) {
     return manager.getRepository(Occupancy).find({
-      where: [
-        { roomId, checkInDate: LessThanOrEqual(date), checkOutDate: IsNull() },
-        { roomId, checkInDate: LessThanOrEqual(date), checkOutDate: MoreThanOrEqual(date) },
-      ],
+      where: occupancyWhereOnDate(date, roomId),
       relations: ['student', 'bed'],
       order: { id: 'ASC' },
     });
@@ -222,10 +220,7 @@ export class RoomInspectionsService implements OnApplicationBootstrap {
 
   private findAllOccupanciesForDate(manager: EntityManager, date: string) {
     return manager.getRepository(Occupancy).find({
-      where: [
-        { checkInDate: LessThanOrEqual(date), checkOutDate: IsNull() },
-        { checkInDate: LessThanOrEqual(date), checkOutDate: MoreThanOrEqual(date) },
-      ],
+      where: occupancyWhereOnDate(date),
       relations: ['student', 'bed'],
       order: { roomId: 'ASC', id: 'ASC' },
     });
diff --git a/apps/server/src/rooms/room-occupancy-date.spec.ts b/apps/server/src/rooms/room-occupancy-date.spec.ts
new file mode 100644
index 0000000..cf6fb25
--- /dev/null
+++ b/apps/server/src/rooms/room-occupancy-date.spec.ts
@@ -0,0 +1,22 @@
+import { occupancyWhereOnDate } from './room-occupancy-date';
+
+describe('occupancyWhereOnDate', () => {
+  it('treats checkout date as the first day no longer occupying the old room', () => {
+    const where = occupancyWhereOnDate('2026-07-22', 10);
+
+    expect(where).toHaveLength(2);
+    expect(where[0]).toEqual(
+      expect.objectContaining({ roomId: 10, checkInDate: expect.anything(), checkOutDate: expect.anything() }),
+    );
+    expect(where[1]).toEqual(
+      expect.objectContaining({ roomId: 10, checkInDate: expect.anything(), checkOutDate: expect.anything() }),
+    );
+    expect(String((where[1] as any).checkOutDate._type)).toBe('moreThan');
+    expect((where[1] as any).checkOutDate._value).toBe('2026-07-22');
+  });
+
+  it('can query all rooms for automatic settlement', () => {
+    const where = occupancyWhereOnDate('2026-07-22');
+    expect(where.every((condition) => condition.roomId === undefined)).toBe(true);
+  });
+});
diff --git a/apps/server/src/rooms/room-occupancy-date.ts b/apps/server/src/rooms/room-occupancy-date.ts
new file mode 100644
index 0000000..2949720
--- /dev/null
+++ b/apps/server/src/rooms/room-occupancy-date.ts
@@ -0,0 +1,13 @@
+import { FindOptionsWhere, IsNull, LessThanOrEqual, MoreThan } from 'typeorm';
+import { Occupancy } from '../entities/occupancy.entity';
+
+export function occupancyWhereOnDate(
+  date: string,
+  roomId?: number,
+): FindOptionsWhere<Occupancy>[] {
+  const scope = roomId === undefined ? {} : { roomId };
+  return [
+    { ...scope, checkInDate: LessThanOrEqual(date), checkOutDate: IsNull() },
+    { ...scope, checkInDate: LessThanOrEqual(date), checkOutDate: MoreThan(date) },
+  ];
+}
diff --git a/apps/server/src/rooms/rooms.service.ts b/apps/server/src/rooms/rooms.service.ts
index 299bb69..cfcb104 100644
--- a/apps/server/src/rooms/rooms.service.ts
+++ b/apps/server/src/rooms/rooms.service.ts
@@ -8,7 +8,6 @@ import {
   Not,
   In,
   LessThanOrEqual,
-  MoreThanOrEqual,
 } from 'typeorm';
 
 import { Room } from '../entities/room.entity';
@@ -20,6 +19,7 @@ import { CreateRoomDto, UpdateRoomDto } from './dto/room.dto';
 import { CreateBedDto, UpdateBedDto, BatchCreateBedDto } from './dto/bed.dto';
 import { CreateLockerDto, UpdateLockerDto, BatchCreateLockerDto } from './dto/locker.dto';
 import { RoomInspectionsService } from './room-inspections.service';
+import { occupancyWhereOnDate } from './room-occupancy-date';
 
 @Injectable()
 export class RoomsService {
@@ -246,10 +246,7 @@ export class RoomsService {
     });
 
     const occupancies = await this.occRepo.find({
-      where: [
-        { checkInDate: LessThanOrEqual(targetDate), checkOutDate: IsNull() },
-        { checkInDate: LessThanOrEqual(targetDate), checkOutDate: MoreThanOrEqual(targetDate) },
-      ],
+      where: occupancyWhereOnDate(targetDate),
       relations: ['student', 'student.organization', 'responsibleOrganization', 'bed'],
       order: { checkInDate: 'ASC' },
     });