diff --git a/README.md b/README.md
index 98cf57e3..38244f24 100644
--- a/README.md
+++ b/README.md
@@ -68,6 +68,11 @@ Springdoc OpenAPI가 활성화되어 있습니다. 로컬 실행 후 아래 경
 
 - `/swagger-ui/index.html`
 
+## 부하 테스트 (k6)
+
+- 시나리오/seed 파일: `load-test/k6`
+- 순수 백엔드 동시성 검증(메일 전송 제외) 가이드는 `load-test/k6/README.md` 참고
+
 ## 데이터베이스 마이그레이션
 
 Flyway를 사용하며, SQL 파일은 다음 경로에 있습니다.
diff --git a/load-test/k6/README.md b/load-test/k6/README.md
new file mode 100644
index 00000000..6a54da7a
--- /dev/null
+++ b/load-test/k6/README.md
@@ -0,0 +1,29 @@
+# k6 Load Test (Pure Backend Concurrency)
+
+## 1) Server start option
+
+To exclude SMTP/SES latency from registration concurrency tests, start the server with:
+
+```bash
+REGISTRATION_EMAIL_NOTIFICATIONS_ENABLED=false ./gradlew bootRun
+```
+
+This keeps registration transaction logic active while disabling post-commit email sends.
+
+## 2) Seed test users
+
+```bash
+mysql -u <user> -p <db> < load-test/k6/seed/seed_users.sql
+```
+
+## 3) Run scenario
+
+```bash
+k6 run -e BASE_URL=http://localhost:8080 load-test/k6/scenarios/03_registration_concurrent.js
+```
+
+## 4) Cleanup
+
+```bash
+mysql -u <user> -p <db> < load-test/k6/seed/cleanup_users.sql
+```
diff --git a/load-test/k6/config.js b/load-test/k6/config.js
new file mode 100644
index 00000000..20df9453
--- /dev/null
+++ b/load-test/k6/config.js
@@ -0,0 +1,23 @@
+// 실행 시 -e BASE_URL=https://moiming-dev-api.wafflestudio.com 으로 오버라이드 가능
+// 예) k6 run -e BASE_URL=https://moiming-dev-api.wafflestudio.com scenarios/01_auth.js
+export const BASE_URL = __ENV.BASE_URL || 'http://localhost:8080';
+
+export const THRESHOLDS = {
+  http_req_failed: [{ threshold: 'rate<0.01', abortOnFail: false }],
+  http_req_duration: [
+    { threshold: 'p(95)<500', abortOnFail: false },
+    { threshold: 'p(99)<1000', abortOnFail: false },
+  ],
+  checks: [{ threshold: 'rate>0.99', abortOnFail: false }],
+};
+
+export const DEFAULT_HEADERS = {
+  'Content-Type': 'application/json',
+};
+
+export function authHeaders(token) {
+  return {
+    ...DEFAULT_HEADERS,
+    Authorization: `Bearer ${token}`,
+  };
+}
diff --git a/load-test/k6/helpers/auth.js b/load-test/k6/helpers/auth.js
new file mode 100644
index 00000000..c8a3494a
--- /dev/null
+++ b/load-test/k6/helpers/auth.js
@@ -0,0 +1,35 @@
+import http from 'k6/http';
+import { check } from 'k6';
+import { BASE_URL, DEFAULT_HEADERS } from '../config.js';
+
+/**
+ * 로그인 후 JWT 토큰을 반환한다.
+ * @param {string} email
+ * @param {string} password
+ * @returns {string} JWT token
+ */
+export function login(email, password) {
+  const res = http.post(
+    `${BASE_URL}/api/auth/login`,
+    JSON.stringify({ email, password }),
+    { headers: DEFAULT_HEADERS },
+  );
+
+  check(res, { 'login 200': (r) => r.status === 200 });
+
+  return res.json('token');
+}
+
+/**
+ * 로그아웃 (토큰 블랙리스트 처리)
+ * @param {string} token
+ */
+export function logout(token) {
+  const res = http.post(
+    `${BASE_URL}/api/auth/logout`,
+    null,
+    { headers: { Authorization: `Bearer ${token}` } },
+  );
+
+  check(res, { 'logout 204': (r) => r.status === 204 });
+}
\ No newline at end of file
diff --git a/load-test/k6/helpers/data.js b/load-test/k6/helpers/data.js
new file mode 100644
index 00000000..6578e266
--- /dev/null
+++ b/load-test/k6/helpers/data.js
@@ -0,0 +1,44 @@
+import http from 'k6/http';
+import { check } from 'k6';
+import { BASE_URL, authHeaders } from '../config.js';
+
+/**
+ * 테스트용 유저 자격증명을 생성한다 (실제 가입은 별도 seed 필요).
+ * @param {number} index - VU 번호 등 고유 식별자
+ * @returns {{ email: string, password: string }}
+ */
+export function makeUserCredentials(index) {
+  return {
+    email: `loadtest-user-${index}@example.com`,
+    password: 'password123!',
+  };
+}
+
+/**
+ * 이벤트를 생성하고 publicId를 반환한다.
+ * @param {string} token - 호스트 JWT 토큰
+ * @param {object} overrides - CreateEventRequest 필드 오버라이드
+ * @returns {string} publicId
+ */
+export function createEvent(token, overrides = {}) {
+  const now = new Date();
+  const body = {
+    title: 'Load Test Event',
+    capacity: 10,
+    waitlistEnabled: true,
+    // null = 제한 없음 (EventService: 과거 시각 불가 / RegistrationService: null이면 시작 제한 없음)
+    registrationStartsAt: null,
+    registrationEndsAt: new Date(now.getTime() + 3_600_000).toISOString(), // 1시간 후
+    ...overrides,
+  };
+
+  const res = http.post(
+    `${BASE_URL}/api/events`,
+    JSON.stringify(body),
+    { headers: authHeaders(token) },
+  );
+
+  check(res, { 'createEvent 200': (r) => r.status === 200 });
+
+  return res.json('publicId');
+}
diff --git a/load-test/k6/scenarios/01_auth.js b/load-test/k6/scenarios/01_auth.js
new file mode 100644
index 00000000..ac82cddc
--- /dev/null
+++ b/load-test/k6/scenarios/01_auth.js
@@ -0,0 +1,26 @@
+import { sleep } from 'k6';
+import { THRESHOLDS } from '../config.js';
+import { login, logout } from '../helpers/auth.js';
+
+export const options = {
+  thresholds: THRESHOLDS,
+  stages: [
+    { duration: '15s', target: 25 }, // 램프업
+    { duration: '1m',  target: 25 }, // 유지
+    { duration: '15s', target: 0  }, // 램프다운
+  ],
+};
+
+// 테스트 전 DB에 미리 생성해둔 계정 사용
+// seed: loadtest-user-0@example.com ~ loadtest-user-49@example.com / password123!
+export default function () {
+  const index = __VU % 50;
+  const email = `loadtest-user-${index}@example.com`;
+  const password = 'password123!';
+
+  const token = login(email, password);
+  sleep(1);
+
+  logout(token);
+  sleep(1);
+}
diff --git a/load-test/k6/scenarios/02_event_read.js b/load-test/k6/scenarios/02_event_read.js
new file mode 100644
index 00000000..e8c830db
--- /dev/null
+++ b/load-test/k6/scenarios/02_event_read.js
@@ -0,0 +1,41 @@
+import http from 'k6/http';
+import { check, sleep } from 'k6';
+import { BASE_URL, THRESHOLDS, authHeaders } from '../config.js';
+import { login } from '../helpers/auth.js';
+import { createEvent } from '../helpers/data.js';
+
+export const options = {
+  thresholds: THRESHOLDS,
+  stages: [
+    { duration: '30s', target: 30 }, // 램프업
+    { duration: '2m',  target: 30 }, // 유지
+    { duration: '15s', target: 0   }, // 램프다운
+  ],
+};
+
+export function setup() {
+  const token = login('loadtest-host@example.com', 'password123!');
+  const publicId = createEvent(token);
+  return { token, publicId };
+}
+
+export default function ({ token, publicId }) {
+
+  // 이벤트 상세 조회
+  const detailRes = http.get(
+    `${BASE_URL}/api/events/${publicId}`,
+    { headers: authHeaders(token) },
+  );
+  check(detailRes, { 'event detail 200': (r) => r.status === 200 });
+
+  sleep(0.5);
+
+  // 신청 목록 조회
+  const regRes = http.get(
+    `${BASE_URL}/api/events/${publicId}/registrations`,
+    { headers: authHeaders(token) },
+  );
+  check(regRes, { 'registrations 200': (r) => r.status === 200 });
+
+  sleep(1);
+}
diff --git a/load-test/k6/scenarios/03_registration_concurrent.js b/load-test/k6/scenarios/03_registration_concurrent.js
new file mode 100644
index 00000000..1549240a
--- /dev/null
+++ b/load-test/k6/scenarios/03_registration_concurrent.js
@@ -0,0 +1,111 @@
+import http from 'k6/http';
+import { check, fail } from 'k6';
+import { Rate } from 'k6/metrics';
+import { BASE_URL, THRESHOLDS, authHeaders } from '../config.js';
+import { login } from '../helpers/auth.js';
+import { createEvent, makeUserCredentials } from '../helpers/data.js';
+
+const VU_COUNT = 15;
+const CAPACITY = 4;
+const registrationConsistency = new Rate('registration_consistency');
+
+export const options = {
+  thresholds: {
+    ...THRESHOLDS,
+    // 신청 자체는 정원 초과여도 200이므로 실패율 기준 유지
+    http_req_failed: [{ threshold: 'rate<0.01' }],
+    // 핵심 경로(등록 API)만 따로 latency threshold를 건다.
+    'http_req_duration{endpoint:registration_create}': [
+      { threshold: 'p(95)<500', abortOnFail: false },
+      { threshold: 'p(99)<1000', abortOnFail: false },
+    ],
+    // teardown에서 기록하는 정합성 지표
+    registration_consistency: [{ threshold: 'rate==1' }],
+  },
+  // 각 VU가 정확히 1회씩 실행되도록 고정한다.
+  scenarios: {
+    registration_concurrent: {
+      executor: 'per-vu-iterations',
+      vus: VU_COUNT,
+      iterations: 1,
+      maxDuration: '1m',
+    },
+  },
+};
+
+export function setup() {
+  // 호스트 계정으로 이벤트 생성
+  const hostToken = login('loadtest-host@example.com', 'password123!');
+  const publicId = createEvent(hostToken, { capacity: CAPACITY, waitlistEnabled: true });
+  console.log(`이벤트 생성 완료: ${BASE_URL}/api/events/${publicId}`);
+
+  // 참여자 토큰 미리 발급 (setup에서 직렬 처리)
+  const tokens = [];
+  for (let i = 0; i < VU_COUNT; i++) {
+    const { email, password } = makeUserCredentials(i);
+    tokens.push(login(email, password));
+  }
+
+  return { publicId, tokens };
+}
+
+export default function ({ publicId, tokens }) {
+  const token = tokens[__VU - 1];
+
+  const res = http.post(
+    `${BASE_URL}/api/events/${publicId}/registrations`,
+    JSON.stringify({}),
+    {
+      headers: authHeaders(token),
+      tags: { endpoint: 'registration_create' },
+    },
+  );
+
+  check(res, {
+    'registration 200': (r) => r.status === 200,
+    'registrationPublicId exists': (r) => !!r.json('registrationPublicId'),
+  });
+}
+
+export function teardown({ publicId }) {
+  // 결과 요약: CONFIRMED / WAITLISTED 수량 출력 (페이지네이션 처리)
+  const hostToken = login('loadtest-host@example.com', 'password123!');
+
+  let allRegistrations = [];
+  let cursor = null;
+
+  do {
+    const url = cursor
+      ? `${BASE_URL}/api/events/${publicId}/registrations?cursor=${cursor}`
+      : `${BASE_URL}/api/events/${publicId}/registrations`;
+
+    const res = http.get(url, { headers: authHeaders(hostToken) });
+    const body = res.json();
+
+    allRegistrations = allRegistrations.concat(body.participants || []);
+    cursor = body.hasNext ? body.nextCursor : null;
+  } while (cursor !== null);
+
+  const confirmed = allRegistrations.filter((r) => r.status === 'CONFIRMED').length;
+  const waitlisted = allRegistrations.filter((r) => r.status === 'WAITLISTED').length;
+  const expectedWaitlisted = VU_COUNT - CAPACITY;
+  const isConsistent =
+    confirmed === CAPACITY &&
+    waitlisted === expectedWaitlisted &&
+    allRegistrations.length === VU_COUNT;
+
+  console.log(`CONFIRMED: ${confirmed} (expected: ${CAPACITY})`);
+  console.log(`WAITLISTED: ${waitlisted} (expected: ${expectedWaitlisted})`);
+  console.log(`TOTAL: ${allRegistrations.length} (expected: ${VU_COUNT})`);
+  console.log(`동시성 이상 없음: ${isConsistent ? 'PASS' : 'FAIL'}`);
+
+  registrationConsistency.add(isConsistent ? 1 : 0);
+  check(null, {
+    'concurrency consistency': () => isConsistent,
+  });
+  if (!isConsistent) {
+    fail(
+      `concurrency mismatch: confirmed=${confirmed}, waitlisted=${waitlisted}, total=${allRegistrations.length}`,
+    );
+  }
+}
diff --git a/load-test/k6/seed/cleanup_users.sql b/load-test/k6/seed/cleanup_users.sql
new file mode 100644
index 00000000..adbd0b5c
--- /dev/null
+++ b/load-test/k6/seed/cleanup_users.sql
@@ -0,0 +1,2 @@
+-- 부하 테스트 완료 후 seed 유저 정리
+DELETE FROM users WHERE email LIKE 'loadtest-%@example.com';
\ No newline at end of file
diff --git a/load-test/k6/seed/seed_users.sql b/load-test/k6/seed/seed_users.sql
new file mode 100644
index 00000000..5ec1d833
--- /dev/null
+++ b/load-test/k6/seed/seed_users.sql
@@ -0,0 +1,117 @@
+-- ============================================================
+-- 부하 테스트용 유저 seed
+-- 실행 전: BCRYPT_HASH 자리에 실제 해시값을 넣을 것
+--
+-- BCrypt 해시 생성 방법 (비밀번호: password123!, rounds=12):
+--   $ htpasswd -bnBC 12 "" password123! | tr -d ':\n'
+-- ============================================================
+
+SET @password_hash = '$2a$12$NZxQIubFeVpXYzCiruohjuzFZjA.UyGVeLtndK.KGpvDO.g6A3BcS';
+SET @now = NOW(6);
+
+-- 호스트 계정 (이벤트 생성용)
+INSERT IGNORE INTO users (email, name, password_hash, created_at, updated_at)
+VALUES ('loadtest-host@example.com', 'LoadTest Host', @password_hash, @now, @now);
+
+-- 참여자 계정 100명 (loadtest-user-0 ~ loadtest-user-99)
+INSERT IGNORE INTO users (email, name, password_hash, created_at, updated_at) VALUES
+('loadtest-user-0@example.com',  'LoadTest User 0',  @password_hash, @now, @now),
+('loadtest-user-1@example.com',  'LoadTest User 1',  @password_hash, @now, @now),
+('loadtest-user-2@example.com',  'LoadTest User 2',  @password_hash, @now, @now),
+('loadtest-user-3@example.com',  'LoadTest User 3',  @password_hash, @now, @now),
+('loadtest-user-4@example.com',  'LoadTest User 4',  @password_hash, @now, @now),
+('loadtest-user-5@example.com',  'LoadTest User 5',  @password_hash, @now, @now),
+('loadtest-user-6@example.com',  'LoadTest User 6',  @password_hash, @now, @now),
+('loadtest-user-7@example.com',  'LoadTest User 7',  @password_hash, @now, @now),
+('loadtest-user-8@example.com',  'LoadTest User 8',  @password_hash, @now, @now),
+('loadtest-user-9@example.com',  'LoadTest User 9',  @password_hash, @now, @now),
+('loadtest-user-10@example.com', 'LoadTest User 10', @password_hash, @now, @now),
+('loadtest-user-11@example.com', 'LoadTest User 11', @password_hash, @now, @now),
+('loadtest-user-12@example.com', 'LoadTest User 12', @password_hash, @now, @now),
+('loadtest-user-13@example.com', 'LoadTest User 13', @password_hash, @now, @now),
+('loadtest-user-14@example.com', 'LoadTest User 14', @password_hash, @now, @now),
+('loadtest-user-15@example.com', 'LoadTest User 15', @password_hash, @now, @now),
+('loadtest-user-16@example.com', 'LoadTest User 16', @password_hash, @now, @now),
+('loadtest-user-17@example.com', 'LoadTest User 17', @password_hash, @now, @now),
+('loadtest-user-18@example.com', 'LoadTest User 18', @password_hash, @now, @now),
+('loadtest-user-19@example.com', 'LoadTest User 19', @password_hash, @now, @now),
+('loadtest-user-20@example.com', 'LoadTest User 20', @password_hash, @now, @now),
+('loadtest-user-21@example.com', 'LoadTest User 21', @password_hash, @now, @now),
+('loadtest-user-22@example.com', 'LoadTest User 22', @password_hash, @now, @now),
+('loadtest-user-23@example.com', 'LoadTest User 23', @password_hash, @now, @now),
+('loadtest-user-24@example.com', 'LoadTest User 24', @password_hash, @now, @now),
+('loadtest-user-25@example.com', 'LoadTest User 25', @password_hash, @now, @now),
+('loadtest-user-26@example.com', 'LoadTest User 26', @password_hash, @now, @now),
+('loadtest-user-27@example.com', 'LoadTest User 27', @password_hash, @now, @now),
+('loadtest-user-28@example.com', 'LoadTest User 28', @password_hash, @now, @now),
+('loadtest-user-29@example.com', 'LoadTest User 29', @password_hash, @now, @now),
+('loadtest-user-30@example.com', 'LoadTest User 30', @password_hash, @now, @now),
+('loadtest-user-31@example.com', 'LoadTest User 31', @password_hash, @now, @now),
+('loadtest-user-32@example.com', 'LoadTest User 32', @password_hash, @now, @now),
+('loadtest-user-33@example.com', 'LoadTest User 33', @password_hash, @now, @now),
+('loadtest-user-34@example.com', 'LoadTest User 34', @password_hash, @now, @now),
+('loadtest-user-35@example.com', 'LoadTest User 35', @password_hash, @now, @now),
+('loadtest-user-36@example.com', 'LoadTest User 36', @password_hash, @now, @now),
+('loadtest-user-37@example.com', 'LoadTest User 37', @password_hash, @now, @now),
+('loadtest-user-38@example.com', 'LoadTest User 38', @password_hash, @now, @now),
+('loadtest-user-39@example.com', 'LoadTest User 39', @password_hash, @now, @now),
+('loadtest-user-40@example.com', 'LoadTest User 40', @password_hash, @now, @now),
+('loadtest-user-41@example.com', 'LoadTest User 41', @password_hash, @now, @now),
+('loadtest-user-42@example.com', 'LoadTest User 42', @password_hash, @now, @now),
+('loadtest-user-43@example.com', 'LoadTest User 43', @password_hash, @now, @now),
+('loadtest-user-44@example.com', 'LoadTest User 44', @password_hash, @now, @now),
+('loadtest-user-45@example.com', 'LoadTest User 45', @password_hash, @now, @now),
+('loadtest-user-46@example.com', 'LoadTest User 46', @password_hash, @now, @now),
+('loadtest-user-47@example.com', 'LoadTest User 47', @password_hash, @now, @now),
+('loadtest-user-48@example.com', 'LoadTest User 48', @password_hash, @now, @now),
+('loadtest-user-49@example.com', 'LoadTest User 49', @password_hash, @now, @now),
+('loadtest-user-50@example.com', 'LoadTest User 50', @password_hash, @now, @now),
+('loadtest-user-51@example.com', 'LoadTest User 51', @password_hash, @now, @now),
+('loadtest-user-52@example.com', 'LoadTest User 52', @password_hash, @now, @now),
+('loadtest-user-53@example.com', 'LoadTest User 53', @password_hash, @now, @now),
+('loadtest-user-54@example.com', 'LoadTest User 54', @password_hash, @now, @now),
+('loadtest-user-55@example.com', 'LoadTest User 55', @password_hash, @now, @now),
+('loadtest-user-56@example.com', 'LoadTest User 56', @password_hash, @now, @now),
+('loadtest-user-57@example.com', 'LoadTest User 57', @password_hash, @now, @now),
+('loadtest-user-58@example.com', 'LoadTest User 58', @password_hash, @now, @now),
+('loadtest-user-59@example.com', 'LoadTest User 59', @password_hash, @now, @now),
+('loadtest-user-60@example.com', 'LoadTest User 60', @password_hash, @now, @now),
+('loadtest-user-61@example.com', 'LoadTest User 61', @password_hash, @now, @now),
+('loadtest-user-62@example.com', 'LoadTest User 62', @password_hash, @now, @now),
+('loadtest-user-63@example.com', 'LoadTest User 63', @password_hash, @now, @now),
+('loadtest-user-64@example.com', 'LoadTest User 64', @password_hash, @now, @now),
+('loadtest-user-65@example.com', 'LoadTest User 65', @password_hash, @now, @now),
+('loadtest-user-66@example.com', 'LoadTest User 66', @password_hash, @now, @now),
+('loadtest-user-67@example.com', 'LoadTest User 67', @password_hash, @now, @now),
+('loadtest-user-68@example.com', 'LoadTest User 68', @password_hash, @now, @now),
+('loadtest-user-69@example.com', 'LoadTest User 69', @password_hash, @now, @now),
+('loadtest-user-70@example.com', 'LoadTest User 70', @password_hash, @now, @now),
+('loadtest-user-71@example.com', 'LoadTest User 71', @password_hash, @now, @now),
+('loadtest-user-72@example.com', 'LoadTest User 72', @password_hash, @now, @now),
+('loadtest-user-73@example.com', 'LoadTest User 73', @password_hash, @now, @now),
+('loadtest-user-74@example.com', 'LoadTest User 74', @password_hash, @now, @now),
+('loadtest-user-75@example.com', 'LoadTest User 75', @password_hash, @now, @now),
+('loadtest-user-76@example.com', 'LoadTest User 76', @password_hash, @now, @now),
+('loadtest-user-77@example.com', 'LoadTest User 77', @password_hash, @now, @now),
+('loadtest-user-78@example.com', 'LoadTest User 78', @password_hash, @now, @now),
+('loadtest-user-79@example.com', 'LoadTest User 79', @password_hash, @now, @now),
+('loadtest-user-80@example.com', 'LoadTest User 80', @password_hash, @now, @now),
+('loadtest-user-81@example.com', 'LoadTest User 81', @password_hash, @now, @now),
+('loadtest-user-82@example.com', 'LoadTest User 82', @password_hash, @now, @now),
+('loadtest-user-83@example.com', 'LoadTest User 83', @password_hash, @now, @now),
+('loadtest-user-84@example.com', 'LoadTest User 84', @password_hash, @now, @now),
+('loadtest-user-85@example.com', 'LoadTest User 85', @password_hash, @now, @now),
+('loadtest-user-86@example.com', 'LoadTest User 86', @password_hash, @now, @now),
+('loadtest-user-87@example.com', 'LoadTest User 87', @password_hash, @now, @now),
+('loadtest-user-88@example.com', 'LoadTest User 88', @password_hash, @now, @now),
+('loadtest-user-89@example.com', 'LoadTest User 89', @password_hash, @now, @now),
+('loadtest-user-90@example.com', 'LoadTest User 90', @password_hash, @now, @now),
+('loadtest-user-91@example.com', 'LoadTest User 91', @password_hash, @now, @now),
+('loadtest-user-92@example.com', 'LoadTest User 92', @password_hash, @now, @now),
+('loadtest-user-93@example.com', 'LoadTest User 93', @password_hash, @now, @now),
+('loadtest-user-94@example.com', 'LoadTest User 94', @password_hash, @now, @now),
+('loadtest-user-95@example.com', 'LoadTest User 95', @password_hash, @now, @now),
+('loadtest-user-96@example.com', 'LoadTest User 96', @password_hash, @now, @now),
+('loadtest-user-97@example.com', 'LoadTest User 97', @password_hash, @now, @now),
+('loadtest-user-98@example.com', 'LoadTest User 98', @password_hash, @now, @now),
+('loadtest-user-99@example.com', 'LoadTest User 99', @password_hash, @now, @now);