diff --git a/src/api/paymentApi.js b/src/api/paymentApi.js
index 4e02f16..6cb6fa9 100644
--- a/src/api/paymentApi.js
+++ b/src/api/paymentApi.js
@@ -6,6 +6,8 @@ export const paymentApi = {
   search: (params) => axiosInstance.get('/payments/admin/search', { params }),
   getOne: (id) => axiosInstance.get(`/payments/admin/get-one/${id}`),
   create: (data) => axiosInstance.post('/payments/admin/create', data),
+  createBulkClass: (data) => axiosInstance.post('/payments/admin/bulk-class', data),
+  checkDuplicate: (params) => axiosInstance.get('/payments/admin/check-duplicate', { params }),
   update: (id, data) => axiosInstance.put(`/payments/admin/update/${id}`, data),
   delete: (id) => axiosInstance.delete(`/payments/admin/delete/${id}`),
   recordTransaction: (paymentId, data) => axiosInstance.post(`/payments/admin/transactions/${paymentId}`, data),
diff --git a/src/views/classes/ClassDetailView.vue b/src/views/classes/ClassDetailView.vue
index 810ea2f..1f7d43f 100644
--- a/src/views/classes/ClassDetailView.vue
+++ b/src/views/classes/ClassDetailView.vue
@@ -11,6 +11,15 @@
           @click="$router.push(`/financial-reports?classId=${classId}`)"
         />
       </PermissionGate>
+      <PermissionGate permission="payments:create">
+        <Button
+          label="صدور صورتحساب گروهی"
+          icon="pi pi-wallet"
+          severity="success"
+          class="ml-2"
+          @click="openBulkModal"
+        />
+      </PermissionGate>
       <Button
         label="حذف کلاس"
         icon="pi pi-trash"
@@ -151,31 +160,111 @@
       :loading="isDeletingClass"
       @confirm="handleDeleteClass"
     />
+
+    <!-- Bulk Class Payment Modal -->
+    <Dialog v-model:visible="bulkModalVisible" header="صدور صورتحساب گروهی برای این کلاس" modal :style="{ width: '540px' }">
+      <div class="flex flex-column gap-3 py-2" v-if="classData">
+        <div class="p-3 bg-blue-50 border-round border-1 border-blue-200 text-blue-900 text-sm flex align-items-center justify-content-between">
+          <span>تعداد دانشجویان ثبت‌نام‌شده:</span>
+          <span class="font-bold">{{ toPersianDigits((classData.students || []).length) }} نفر</span>
+        </div>
+
+        <div class="flex flex-column gap-2">
+          <label class="font-semibold text-sm" for="class-bulk-amount">مبلغ شهریه هر دانشجو (تومان) *</label>
+          <InputNumber inputId="class-bulk-amount" v-model="bulkForm.amount" class="w-full text-sm" suffix=" تومان" :min="0" />
+        </div>
+
+        <div class="flex align-items-center gap-2">
+          <Checkbox v-model="hasBulkDiscount" binary inputId="class-bulk-discount" />
+          <label for="class-bulk-discount" class="font-semibold text-sm cursor-pointer">تخفیف همگانی ؟</label>
+        </div>
+
+        <div v-if="hasBulkDiscount" class="flex flex-column gap-2">
+          <label class="font-semibold text-sm" for="class-bulk-discount-amount">مبلغ تخفیف (تومان)</label>
+          <InputNumber
+            inputId="class-bulk-discount-amount"
+            v-model="bulkForm.discount"
+            class="w-full text-sm"
+            suffix=" تومان"
+            :min="0"
+            :max="bulkForm.amount || 0"
+          />
+          <small class="font-semibold text-color">
+            مبلغ نهایی هر صورتحساب: {{ toPersianDigits(bulkPayableAmount.toLocaleString()) }} تومان
+          </small>
+        </div>
+
+        <div class="flex flex-column gap-2">
+          <label class="font-semibold text-sm">تاریخ سررسید *</label>
+          <DatePicker v-model="bulkForm.dueDate" class="w-full text-sm" :placeholder="getTodayJalali()" />
+        </div>
+
+        <div class="flex align-items-center gap-2">
+          <Checkbox v-model="bulkForm.skipExisting" binary inputId="class-bulk-skip-existing" />
+          <label for="class-bulk-skip-existing" class="text-sm cursor-pointer font-medium">
+            عدم صدور مجدد برای دانشجویانی که قبلاً در این کلاس صورتحساب دارند
+          </label>
+        </div>
+
+        <div class="flex flex-column gap-2">
+          <label class="font-semibold text-sm" for="class-bulk-notes">یادداشت</label>
+          <Textarea
+            id="class-bulk-notes"
+            v-model="bulkForm.notes"
+            rows="2"
+            class="w-full text-sm"
+            maxlength="5000"
+            placeholder="یادداشت برای تمام صورتحساب‌های صادره…"
+          />
+        </div>
+
+        <NotifyChannelsField :notify="bulkNotify" />
+      </div>
+      <template #footer>
+        <Button label="انصراف" text severity="secondary" @click="bulkModalVisible = false" />
+        <Button
+          label="صدور صورتحساب‌ها"
+          icon="pi pi-check"
+          severity="success"
+          :loading="isBulkCreating"
+          :disabled="!(classData?.students?.length)"
+          @click="handleBulkCreatePayment"
+        />
+      </template>
+    </Dialog>
   </div>
 </template>
 
 <script setup>
-import { ref, computed, onMounted } from 'vue';
+import { ref, reactive, computed, onMounted } from 'vue';
 import { useRoute, useRouter } from 'vue-router';
 import { classApi } from '@/api/classApi';
-import { formatClassDays, formatClassTime } from '@/utils/classSchedule';
+import { paymentApi } from '@/api/paymentApi';
+import { formatClassDays, formatClassTime, calculateClassMidDate } from '@/utils/classSchedule';
 import { sessionApi } from '@/api/sessionApi';
 import { usePersianDate } from '@/composables/usePersianDate';
 import { useToast } from '@/composables/useToast';
 import { usePermission } from '@/composables/usePermission';
+import { getPayableAmount } from '@/utils/paymentAmount';
 import PageHeader from '@/components/common/PageHeader.vue';
 import StatusTag from '@/components/common/StatusTag.vue';
 import TableSkeleton from '@/components/common/TableSkeleton.vue';
 import ConfirmDeleteDialog from '@/components/common/ConfirmDeleteDialog.vue';
 import PermissionGate from '@/components/common/PermissionGate.vue';
+import NotifyChannelsField from '@/components/common/NotifyChannelsField.vue';
 import Button from 'primevue/button';
 import DataTable from 'primevue/datatable';
 import Column from 'primevue/column';
+import Dialog from 'primevue/dialog';
+import InputNumber from 'primevue/inputnumber';
+import Checkbox from 'primevue/checkbox';
+import Textarea from 'primevue/textarea';
+import DatePicker from 'vue3-persian-datetime-picker';
 
 const route = useRoute();
 const router = useRouter();
 const classId = route.params.id;
-const { toPersianDigits, formatJalali } = usePersianDate();
+const { toPersianDigits, formatJalali, toGregorianIso, getTodayJalali } = usePersianDate();
 const { showError, showSuccess } = useToast();
 const { hasPermission } = usePermission();
 const canManageStudents = computed(() => hasPermission('classes:register_users'));
@@ -190,6 +279,86 @@ const studentToRemove = ref(null);
 const deleteClassDialogVisible = ref(false);
 const isDeletingClass = ref(false);
 
+// Bulk Payment State
+const bulkModalVisible = ref(false);
+const isBulkCreating = ref(false);
+const hasBulkDiscount = ref(false);
+const bulkNotify = reactive({ sms: true, email: true, bot: true });
+const bulkForm = reactive({
+  amount: 0,
+  discount: 0,
+  notes: '',
+  dueDate: getTodayJalali(),
+  skipExisting: true
+});
+
+const bulkPayableAmount = computed(() => getPayableAmount({
+  amount: bulkForm.amount,
+  discount: hasBulkDiscount.value ? bulkForm.discount : 0
+}));
+
+const openBulkModal = () => {
+  if (!classData.value) return;
+  bulkForm.amount = classData.value.tuitionFee || classData.value.course?.price || 0;
+  if (classData.value.hasDiscount && classData.value.discount) {
+    hasBulkDiscount.value = true;
+    bulkForm.discount = classData.value.discount;
+  } else {
+    hasBulkDiscount.value = false;
+    bulkForm.discount = 0;
+  }
+  bulkForm.notes = '';
+  bulkForm.skipExisting = true;
+  bulkNotify.sms = true;
+  bulkNotify.email = true;
+  bulkNotify.bot = true;
+  bulkForm.dueDate = calculateClassMidDate(classData.value, sessions.value);
+  bulkModalVisible.value = true;
+};
+
+const handleBulkCreatePayment = async () => {
+  if (!classData.value?.students?.length) {
+    showError('هیچ دانشجویی در این کلاس ثبت‌نام نشده است');
+    return;
+  }
+  if (!bulkForm.amount) { showError('لطفا مبلغ شهریه را وارد کنید'); return; }
+  if (!bulkForm.dueDate) { showError('لطفا تاریخ سررسید را وارد کنید'); return; }
+  const dueDate = toGregorianIso(bulkForm.dueDate);
+  if (!dueDate) { showError('تاریخ سررسید نامعتبر است'); return; }
+
+  if (hasBulkDiscount.value && (bulkForm.discount || 0) > bulkForm.amount) {
+    showError('مبلغ تخفیف نمی‌تواند بیشتر از مبلغ کل باشد');
+    return;
+  }
+
+  isBulkCreating.value = true;
+  try {
+    const res = await paymentApi.createBulkClass({
+      classId,
+      amount: bulkForm.amount,
+      discount: hasBulkDiscount.value ? (bulkForm.discount || 0) : 0,
+      dueDate,
+      notes: bulkForm.notes,
+      skipExisting: bulkForm.skipExisting,
+      notify: { ...bulkNotify }
+    });
+    const result = res.data?.data || res.data || res;
+    const createdCount = result.createdCount ?? 0;
+    const skippedCount = result.skippedCount ?? 0;
+
+    let msg = `صورتحساب برای ${toPersianDigits(createdCount)} دانشجو با موفقیت ایجاد شد`;
+    if (skippedCount > 0) {
+      msg += ` (${toPersianDigits(skippedCount)} دانشجو به دلیل داشتن صورتحساب قبلی رد شدند)`;
+    }
+    showSuccess(msg);
+    bulkModalVisible.value = false;
+  } catch (err) {
+    showError(err);
+  } finally {
+    isBulkCreating.value = false;
+  }
+};
+
 const deleteClassDialogMessage = computed(() => {
   const name = classData.value?.name;
   return name
diff --git a/src/views/payments/PaymentListView.vue b/src/views/payments/PaymentListView.vue
index b954bf7..8942fcd 100644
--- a/src/views/payments/PaymentListView.vue
+++ b/src/views/payments/PaymentListView.vue
@@ -3,6 +3,7 @@
   <div class="payment-list-view">
     <PageHeader :title="$t('payments.title')" :subtitle="$t('payments.subtitle')">
       <PermissionGate permission="payments:create">
+        <Button label="صدور صورتحساب گروهی" icon="pi pi-users" severity="info" class="ml-2" @click="openBulkModal" />
         <Button :label="$t('payments.addPayment')" icon="pi pi-plus" severity="success" @click="openCreateModal" />
       </PermissionGate>
     </PageHeader>
@@ -108,12 +109,22 @@
             :placeholder="createForm.classes?.length ? 'دانشجوی ثبت‌نام‌شده را انتخاب کنید' : 'ابتدا کلاس را انتخاب کنید'"
             class="w-full text-sm"
             :disabled="!createForm.classes?.length"
+            @change="checkDuplicateInvoice"
           />
           <small v-if="createForm.classes?.length && !eligibleUsers.length" class="text-orange-500">
             هیچ دانشجوی ثبت‌نام‌شده‌ای در کلاس‌های انتخاب‌شده یافت نشد
           </small>
         </div>
 
+        <!-- Duplicate Payment Warning -->
+        <div v-if="duplicateWarning?.hasDuplicate" class="p-3 bg-yellow-50 border-round border-1 border-yellow-400 text-yellow-900 text-sm flex align-items-start gap-2">
+          <i class="pi pi-exclamation-triangle text-yellow-600 text-lg mt-1 flex-shrink-0"></i>
+          <div class="flex flex-column gap-1">
+            <span class="font-bold">هشدار: صورتحساب تکراری</span>
+            <span>برای این دانشجو قبلاً در کلاس‌های انتخاب‌شده صورتحساب ثبت شده است.</span>
+          </div>
+        </div>
+
         <div class="flex flex-column gap-2">
           <label class="font-semibold text-sm" for="invoice-amount">مبلغ کل صورتحساب (تومان) *</label>
           <InputNumber inputId="invoice-amount" v-model="createForm.amount" class="w-full text-sm" suffix=" تومان" :min="0" />
@@ -164,6 +175,92 @@
       </template>
     </Dialog>
 
+    <!-- Bulk Class Payment Modal -->
+    <Dialog v-model:visible="showBulkModal" header="صدور صورتحساب گروهی برای کلاس" modal :style="{ width: '560px' }">
+      <div class="flex flex-column gap-3 py-2">
+        <div class="flex flex-column gap-2">
+          <label class="font-semibold text-sm">انتخاب کلاس *</label>
+          <Dropdown
+            v-model="bulkForm.classId"
+            :options="classesList"
+            optionLabel="name"
+            optionValue="_id"
+            filter
+            placeholder="کلاس را انتخاب کنید"
+            class="w-full text-sm"
+            @change="onBulkClassSelected"
+          />
+        </div>
+
+        <div v-if="selectedBulkClass" class="p-3 bg-blue-50 border-round border-1 border-blue-200 text-blue-900 text-sm flex align-items-center justify-content-between">
+          <span>تعداد کل دانشجویان کلاس:</span>
+          <span class="font-bold">{{ toPersianDigits((selectedBulkClass.students || []).length) }} نفر</span>
+        </div>
+
+        <div class="flex flex-column gap-2">
+          <label class="font-semibold text-sm" for="bulk-invoice-amount">مبلغ شهریه هر دانشجو (تومان) *</label>
+          <InputNumber inputId="bulk-invoice-amount" v-model="bulkForm.amount" class="w-full text-sm" suffix=" تومان" :min="0" />
+        </div>
+
+        <div class="flex align-items-center gap-2">
+          <Checkbox v-model="hasBulkDiscount" binary inputId="bulk-invoice-discount" />
+          <label for="bulk-invoice-discount" class="font-semibold text-sm cursor-pointer">تخفیف همگانی ؟</label>
+        </div>
+
+        <div v-if="hasBulkDiscount" class="flex flex-column gap-2">
+          <label class="font-semibold text-sm" for="bulk-invoice-discount-amount">مبلغ تخفیف (تومان)</label>
+          <InputNumber
+            inputId="bulk-invoice-discount-amount"
+            v-model="bulkForm.discount"
+            class="w-full text-sm"
+            suffix=" تومان"
+            :min="0"
+            :max="bulkForm.amount || 0"
+          />
+          <small class="font-semibold text-color">
+            مبلغ نهایی هر صورتحساب: {{ toPersianDigits(bulkPayableAmount.toLocaleString()) }} تومان
+          </small>
+        </div>
+
+        <div class="flex flex-column gap-2">
+          <label class="font-semibold text-sm">تاریخ سررسید *</label>
+          <DatePicker v-model="bulkForm.dueDate" class="w-full text-sm" :placeholder="getTodayJalali()" />
+        </div>
+
+        <div class="flex align-items-center gap-2">
+          <Checkbox v-model="bulkForm.skipExisting" binary inputId="bulk-skip-existing" />
+          <label for="bulk-skip-existing" class="text-sm cursor-pointer font-medium">
+            عدم صدور مجدد برای دانشجویانی که قبلاً در این کلاس صورتحساب دارند
+          </label>
+        </div>
+
+        <div class="flex flex-column gap-2">
+          <label class="font-semibold text-sm" for="bulk-invoice-notes">یادداشت</label>
+          <Textarea
+            id="bulk-invoice-notes"
+            v-model="bulkForm.notes"
+            rows="2"
+            class="w-full text-sm"
+            maxlength="5000"
+            placeholder="یادداشت برای تمام صورتحساب‌های صادره…"
+          />
+        </div>
+
+        <NotifyChannelsField :notify="bulkNotify" />
+      </div>
+      <template #footer>
+        <Button label="انصراف" text severity="secondary" @click="showBulkModal = false" />
+        <Button
+          label="صدور صورتحساب‌ها"
+          icon="pi pi-check"
+          severity="success"
+          :loading="isBulkCreating"
+          :disabled="!bulkForm.classId || !(selectedBulkClass?.students?.length)"
+          @click="handleBulkCreatePayment"
+        />
+      </template>
+    </Dialog>
+
     <ConfirmDeleteDialog
       v-model="deleteDialogVisible"
       :loading="isDeleting"
@@ -219,6 +316,7 @@ const showCreateModal = ref(false);
 const usersList = ref([]);
 const classesList = ref([]);
 const isCreating = ref(false);
+const duplicateWarning = ref(null);
 
 const createForm = reactive({
   user: null,
@@ -235,6 +333,30 @@ const createPayableAmount = computed(() => getPayableAmount({
   discount: hasDiscount.value ? createForm.discount : 0
 }));
 
+// Bulk payment state
+const showBulkModal = ref(false);
+const isBulkCreating = ref(false);
+const hasBulkDiscount = ref(false);
+const bulkNotify = reactive({ sms: true, email: true, bot: true });
+const bulkForm = reactive({
+  classId: null,
+  amount: 0,
+  discount: 0,
+  notes: '',
+  dueDate: getTodayJalali(),
+  skipExisting: true
+});
+
+const selectedBulkClass = computed(() => {
+  if (!bulkForm.classId) return null;
+  return classesList.value.find((c) => String(c._id || c.id) === String(bulkForm.classId));
+});
+
+const bulkPayableAmount = computed(() => getPayableAmount({
+  amount: bulkForm.amount,
+  discount: hasBulkDiscount.value ? bulkForm.discount : 0
+}));
+
 const deleteDialogVisible = ref(false);
 const selectedPayment = ref(null);
 const isDeleting = ref(false);
@@ -264,11 +386,29 @@ const eligibleUsers = computed(() => {
   return usersList.value.filter((u) => eligibleIds?.has(String(u._id || u.id)));
 });
 
+const checkDuplicateInvoice = async () => {
+  if (!createForm.user || !createForm.classes?.length) {
+    duplicateWarning.value = null;
+    return;
+  }
+  try {
+    const res = await paymentApi.checkDuplicate({
+      userId: createForm.user,
+      classes: createForm.classes.join(',')
+    });
+    duplicateWarning.value = res.data?.data || res.data || res;
+  } catch (err) {
+    duplicateWarning.value = null;
+  }
+};
+
 const onClassesSelected = async () => {
   if (createForm.user && !eligibleUsers.value.some((u) => (u._id || u.id) === createForm.user)) {
     createForm.user = null;
   }
 
+  await checkDuplicateInvoice();
+
   if (!createForm.classes || createForm.classes.length === 0) {
     createForm.amount = 0;
     createForm.discount = 0;
@@ -317,17 +457,115 @@ const resetCreateForm = () => {
   createForm.notes = '';
   createForm.dueDate = getTodayJalali();
   hasDiscount.value = false;
+  duplicateWarning.value = null;
   createNotify.sms = true;
   createNotify.email = true;
   createNotify.bot = true;
 };
 
-
 const openCreateModal = () => {
   resetCreateForm();
   showCreateModal.value = true;
 };
 
+const resetBulkForm = () => {
+  bulkForm.classId = null;
+  bulkForm.amount = 0;
+  bulkForm.discount = 0;
+  bulkForm.notes = '';
+  bulkForm.dueDate = getTodayJalali();
+  bulkForm.skipExisting = true;
+  hasBulkDiscount.value = false;
+  bulkNotify.sms = true;
+  bulkNotify.email = true;
+  bulkNotify.bot = true;
+};
+
+const openBulkModal = () => {
+  resetBulkForm();
+  showBulkModal.value = true;
+};
+
+const onBulkClassSelected = async () => {
+  if (!bulkForm.classId) {
+    bulkForm.amount = 0;
+    bulkForm.discount = 0;
+    bulkForm.dueDate = getTodayJalali();
+    return;
+  }
+  const cls = selectedBulkClass.value;
+  if (cls) {
+    bulkForm.amount = cls.tuitionFee || cls.course?.price || 0;
+    if (cls.hasDiscount && cls.discount) {
+      hasBulkDiscount.value = true;
+      bulkForm.discount = cls.discount;
+    } else {
+      hasBulkDiscount.value = false;
+      bulkForm.discount = 0;
+    }
+
+    try {
+      const res = await sessionApi.getAll({
+        class: bulkForm.classId,
+        sortBy: 'day',
+        sortOrder: 'asc',
+        limit: 100
+      });
+      const data = res.data || res;
+      const rawSessions = data.items || data.sessions || data.data || data || [];
+      const sessionList = Array.isArray(rawSessions) ? rawSessions : [];
+      bulkForm.dueDate = calculateClassMidDate(cls, sessionList);
+    } catch (e) {
+      bulkForm.dueDate = calculateClassMidDate(cls);
+    }
+  }
+};
+
+const handleBulkCreatePayment = async () => {
+  if (!bulkForm.classId) { showError('لطفا کلاس را انتخاب کنید'); return; }
+  if (!selectedBulkClass.value?.students?.length) {
+    showError('هیچ دانشجویی در این کلاس ثبت‌نام نشده است');
+    return;
+  }
+  if (!bulkForm.amount) { showError('لطفا مبلغ شهریه را وارد کنید'); return; }
+  if (!bulkForm.dueDate) { showError('لطفا تاریخ سررسید را وارد کنید'); return; }
+  const dueDate = toGregorianIso(bulkForm.dueDate);
+  if (!dueDate) { showError('تاریخ سررسید نامعتبر است'); return; }
+
+  if (hasBulkDiscount.value && (bulkForm.discount || 0) > bulkForm.amount) {
+    showError('مبلغ تخفیف نمی‌تواند بیشتر از مبلغ کل باشد');
+    return;
+  }
+
+  isBulkCreating.value = true;
+  try {
+    const res = await paymentApi.createBulkClass({
+      classId: bulkForm.classId,
+      amount: bulkForm.amount,
+      discount: hasBulkDiscount.value ? (bulkForm.discount || 0) : 0,
+      dueDate,
+      notes: bulkForm.notes,
+      skipExisting: bulkForm.skipExisting,
+      notify: { ...bulkNotify }
+    });
+    const result = res.data?.data || res.data || res;
+    const createdCount = result.createdCount ?? 0;
+    const skippedCount = result.skippedCount ?? 0;
+
+    let msg = `صورتحساب برای ${toPersianDigits(createdCount)} دانشجو با موفقیت ایجاد شد`;
+    if (skippedCount > 0) {
+      msg += ` (${toPersianDigits(skippedCount)} دانشجو به دلیل داشتن صورتحساب قبلی رد شدند)`;
+    }
+    showSuccess(msg);
+    showBulkModal.value = false;
+    loadData();
+  } catch (err) {
+    showError(err);
+  } finally {
+    isBulkCreating.value = false;
+  }
+};
+
 const fetchDropdownData = async () => {
   try {
     const [uRes, cRes] = await Promise.all([