diff --git a/backend/src/modules/schedule/schedule.service.ts b/backend/src/modules/schedule/schedule.service.ts
index 3f41b5e..3a1d8cf 100644
--- a/backend/src/modules/schedule/schedule.service.ts
+++ b/backend/src/modules/schedule/schedule.service.ts
@@ -1,9 +1,4 @@
-import {
-  Injectable,
-  Logger,
-  NotFoundException,
-  type OnModuleInit,
-} from '@nestjs/common';
+import { Injectable, NotFoundException } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { LessThanOrEqual, MoreThanOrEqual, Repository } from 'typeorm';
 import { User } from '../user/entities/user.entity';
@@ -41,27 +36,10 @@ export interface ScheduleEventResponse {
   createdById: string | null;
 }
 
-// 기본 카테고리 시드 — 최초 1회만 적재(테이블 비어있을 때). label/color/순서.
-const DEFAULT_CATEGORIES: { label: string; color: string }[] = [
-  { label: '회의', color: '#1d4ed8' },
-  { label: '외부 미팅', color: '#0284c7' },
-  { label: '채용·면접', color: '#be185d' },
-  { label: '사내 행사', color: '#4f46e5' },
-  { label: '교육·세미나', color: '#1f9d57' },
-  { label: '휴가·부재', color: '#b7791f' },
-  { label: '회식·모임', color: '#9333ea' },
-  { label: '마감·릴리스', color: '#dc2626' },
-  { label: '리뷰·QA', color: '#0d9488' },
-  { label: '재무·결산', color: '#475569' },
-  { label: '홍보·PR', color: '#ea580c' },
-  { label: '기타', color: '#0e9594' },
-];
-
 // 일정(전사 공유 캘린더) 비즈니스 로직 — 카테고리/일정 CRUD + 참석자 매핑.
+// (기본 카테고리 시드 없음 — 카테고리는 사용자가 직접 추가한다)
 @Injectable()
-export class ScheduleService implements OnModuleInit {
-  private readonly logger = new Logger(ScheduleService.name);
-
+export class ScheduleService {
   constructor(
     @InjectRepository(ScheduleCategory)
     private readonly categoryRepo: Repository<ScheduleCategory>,
@@ -70,21 +48,6 @@ export class ScheduleService implements OnModuleInit {
     private readonly userService: UserService,
   ) {}
 
-  // 기동 시 기본 카테고리 시드(멱등) — 비어있을 때만 적재. dev/prod 공통.
-  async onModuleInit(): Promise<void> {
-    const count = await this.categoryRepo.count();
-    if (count > 0) return;
-    const rows = DEFAULT_CATEGORIES.map((c, i) =>
-      this.categoryRepo.create({
-        label: c.label,
-        color: c.color,
-        sortOrder: i,
-      }),
-    );
-    await this.categoryRepo.save(rows);
-    this.logger.log(`기본 일정 카테고리 ${rows.length}건 시드`);
-  }
-
   // ----- 카테고리 -----
 
   async listCategories(): Promise<ScheduleCategoryResponse[]> {