diff --git a/components/payments/bulkPayment.test.js b/components/payments/bulkPayment.test.js
new file mode 100644
index 0000000..d4288a1
--- /dev/null
+++ b/components/payments/bulkPayment.test.js
@@ -0,0 +1,33 @@
+'use strict';
+
+const { describe, it } = require('node:test');
+const assert = require('node:assert/strict');
+const paymentService = require('./paymentService');
+
+describe('Bulk Payment and Duplicate Check Service', () => {
+  it('exports createBulkClassPayments and checkDuplicatePayment', () => {
+    assert.equal(typeof paymentService.createBulkClassPayments, 'function');
+    assert.equal(typeof paymentService.checkDuplicatePayment, 'function');
+  });
+
+  it('checkDuplicatePayment returns false when userId is not provided', async () => {
+    const result = await paymentService.checkDuplicatePayment({});
+    assert.deepEqual(result, {
+      hasDuplicate: false,
+      count: 0,
+      payments: []
+    });
+  });
+
+  it('createBulkClassPayments throws error when classId is missing', async () => {
+    await assert.rejects(
+      async () => {
+        await paymentService.createBulkClassPayments({});
+      },
+      (err) => {
+        assert.equal(err.errorCode, 'VALIDATION_FAILED');
+        return true;
+      }
+    );
+  });
+});
diff --git a/components/payments/paymentController.js b/components/payments/paymentController.js
index bc43ad1..b9db0c7 100644
--- a/components/payments/paymentController.js
+++ b/components/payments/paymentController.js
@@ -10,6 +10,17 @@ exports.create = catchAsync(async (req, res, next) => {
   return successResponse(res, 201, 'Payment created successfully', payment);
 });
 
+exports.createBulkClass = catchAsync(async (req, res, next) => {
+  const actorId = req.user?._id;
+  const result = await paymentService.createBulkClassPayments(req.body, actorId);
+  return successResponse(res, 201, 'Bulk payments created successfully', result);
+});
+
+exports.checkDuplicate = catchAsync(async (req, res, next) => {
+  const result = await paymentService.checkDuplicatePayment(req.query);
+  return successResponse(res, 200, 'Duplicate check completed', result);
+});
+
 exports.getOne = catchAsync(async (req, res, next) => {
   const payment = await paymentService.getPaymentById(req.params.id);
   return successResponse(res, 200, 'Payment retrieved successfully', payment);
diff --git a/components/payments/paymentRoutes.js b/components/payments/paymentRoutes.js
index 8f3895e..c205c67 100644
--- a/components/payments/paymentRoutes.js
+++ b/components/payments/paymentRoutes.js
@@ -22,6 +22,8 @@ router.post('/user/pay/:id', validateAddTransaction, paymentController.payUser);
 
 // Admin Scope
 router.post('/admin/create', perm.requires(PERMISSIONS.PAYMENTS_CREATE), validateCreatePayment, paymentController.create);
+router.post('/admin/bulk-class', perm.requires(PERMISSIONS.PAYMENTS_CREATE), paymentController.createBulkClass);
+router.get('/admin/check-duplicate', perm.requires(PERMISSIONS.PAYMENTS_READ), paymentController.checkDuplicate);
 router.get('/admin/get-all', perm.requires(PERMISSIONS.PAYMENTS_READ), paymentController.getAll);
 router.get('/admin/search', perm.requires(PERMISSIONS.PAYMENTS_SEARCH), paymentController.search);
 router.get('/admin/get-one/:id', perm.requires(PERMISSIONS.PAYMENTS_READ), paymentController.getOne);
diff --git a/components/payments/paymentService.js b/components/payments/paymentService.js
index 98f2826..0971ff8 100644
--- a/components/payments/paymentService.js
+++ b/components/payments/paymentService.js
@@ -258,6 +258,13 @@ const getAllPayments = async (query) => {
   }
   if (query.userId) filter.user = query.userId;
   if (query.status) filter.status = query.status;
+  if (query.classId) filter.classes = query.classId;
+  if (query.classes) {
+    const classList = Array.isArray(query.classes)
+      ? query.classes
+      : query.classes.split(',').map((s) => s.trim()).filter(Boolean);
+    if (classList.length) filter.classes = { $in: classList };
+  }
 
   const searchTerm = getSearchTerm(query);
   if (searchTerm) {
@@ -482,6 +489,127 @@ const cancelTransaction = async (transactionId, actorId = null) => {
   return getPaymentById(payment._id);
 };
 
+const createBulkClassPayments = async (body, actorId = null) => {
+  const { classId } = body;
+  if (!classId) {
+    throw new AppError('VALIDATION_FAILED', { classId: 'Class ID is required' }, 'شناسه کلاس الزامی است.');
+  }
+
+  const classDoc = await Class.findById(classId).populate('course', 'title price').lean();
+  if (!classDoc) {
+    throw new AppError('CLASS_NOT_FOUND', {}, 'کلاس مورد نظر یافت نشد.');
+  }
+
+  const allStudentIds = (classDoc.students || []).map((s) => String(s._id || s.id || s));
+  const targetStudentIds = (body.studentIds && Array.isArray(body.studentIds) && body.studentIds.length > 0)
+    ? body.studentIds.map(String).filter((id) => allStudentIds.includes(id))
+    : allStudentIds;
+
+  if (!targetStudentIds.length) {
+    return {
+      message: 'هیچ دانشجویی در این کلاس ثبت‌نام نشده است.',
+      totalStudents: 0,
+      createdCount: 0,
+      skippedCount: 0,
+      payments: []
+    };
+  }
+
+  const skipExisting = body.skipExisting !== false;
+  let existingUserIds = new Set();
+  if (skipExisting) {
+    const existing = await Payment.find({
+      classes: classId,
+      user: { $in: targetStudentIds },
+      isDeleted: { $ne: true }
+    }).select('user').lean();
+    existingUserIds = new Set(existing.map((p) => String(p.user)));
+  }
+
+  const amount = body.amount !== undefined && body.amount !== null && body.amount !== ''
+    ? Number(body.amount)
+    : (classDoc.tuitionFee || classDoc.course?.price || 0);
+
+  const discount = body.discount !== undefined && body.discount !== null && body.discount !== ''
+    ? Number(body.discount)
+    : (classDoc.hasDiscount ? (classDoc.discount || 0) : 0);
+
+  const dueDate = parseDate(body.dueDate) || classDoc.startDate || new Date();
+
+  const notify = body.notify || {};
+  const notifySms = body.notifySms;
+  const notifyEmail = body.notifyEmail;
+  const notifyBot = body.notifyBot;
+
+  const createdPayments = [];
+  let skippedCount = 0;
+
+  for (const studentId of targetStudentIds) {
+    if (skipExisting && existingUserIds.has(studentId)) {
+      skippedCount++;
+      continue;
+    }
+
+    const payment = await createPayment({
+      user: studentId,
+      classes: [classId],
+      course: classDoc.course?._id || classDoc.course,
+      amount,
+      discount,
+      dueDate,
+      notes: body.notes,
+      notify,
+      notifySms,
+      notifyEmail,
+      notifyBot
+    }, actorId);
+
+    createdPayments.push(payment);
+  }
+
+  return {
+    totalStudents: targetStudentIds.length,
+    createdCount: createdPayments.length,
+    skippedCount,
+    payments: createdPayments
+  };
+};
+
+const checkDuplicatePayment = async (query = {}) => {
+  const { userId, classId, classes } = query;
+  if (!userId) {
+    return { hasDuplicate: false, count: 0, payments: [] };
+  }
+
+  const filter = {
+    user: userId,
+    isDeleted: { $ne: true }
+  };
+
+  const targetClasses = [];
+  if (classId) targetClasses.push(classId);
+  if (classes) {
+    if (Array.isArray(classes)) targetClasses.push(...classes);
+    else targetClasses.push(...String(classes).split(',').map((s) => s.trim()).filter(Boolean));
+  }
+
+  if (targetClasses.length) {
+    filter.classes = { $in: targetClasses };
+  }
+
+  const payments = await Payment.find(filter)
+    .populate({ path: 'classes', select: 'name' })
+    .populate({ path: 'course', select: 'title' })
+    .select('_id uniqueCode amount discount paidAmount status classes course createdAt')
+    .lean();
+
+  return {
+    hasDuplicate: payments.length > 0,
+    count: payments.length,
+    payments
+  };
+};
+
 const getMyPayments = async (userId, query = {}) => {
   return getAllPayments({ ...query, userId });
 };
@@ -490,6 +618,8 @@ module.exports = {
   getAllPayments,
   getPaymentById,
   createPayment,
+  createBulkClassPayments,
+  checkDuplicatePayment,
   updatePayment,
   deletePayment,
   searchPayments,
diff --git a/package.json b/package.json
index 24311c0..611f511 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
     "start": "node app.js",
     "dev": "nodemon app.js",
     "seed": "node seed.js",
-    "test": "node --test components/classes/classSoftDelete.test.js components/settings/smsTemplates.test.js components/users/passwordReset.test.js components/dataImport/importHelpers.test.js utils/classSchedule.test.js utils/jalaliDate.test.js utils/messagingChannels.test.js utils/notifyFlags.test.js utils/passwordRules.test.js utils/paymentAmount.test.js utils/professorShare.test.js utils/financialRange.test.js"
+    "test": "node --test components/payments/bulkPayment.test.js components/classes/classSoftDelete.test.js components/settings/smsTemplates.test.js components/users/passwordReset.test.js components/dataImport/importHelpers.test.js utils/classSchedule.test.js utils/jalaliDate.test.js utils/messagingChannels.test.js utils/notifyFlags.test.js utils/passwordRules.test.js utils/paymentAmount.test.js utils/professorShare.test.js utils/financialRange.test.js"
   },
   "keywords": [
     "express",