diff --git a/static/js/permissions.js b/static/js/permissions.js
index 4575da1..b2af372 100644
--- a/static/js/permissions.js
+++ b/static/js/permissions.js
@@ -18,8 +18,12 @@ window.app = Vue.createApp({
       showRevokeDialog: false,
       showGrantEquityDialog: false,
       showRevokeEquityDialog: false,
+      showBulkGrantDialog: false,
+      showBulkGrantErrors: false,
       permissionToRevoke: null,
       equityToRevoke: null,
+      bulkGranting: false,
+      bulkGrantResults: null,
       isSuperUser: false,
       grantForm: {
         user_id: '',
@@ -32,6 +36,13 @@ window.app = Vue.createApp({
         user_id: '',
         notes: ''
       },
+      bulkGrantForm: {
+        user_ids: [],
+        account_id: '',
+        permission_type: 'read',
+        notes: '',
+        expires_at: ''
+      },
       permissionTypeOptions: [
         {
           value: 'read',
@@ -77,6 +88,15 @@ window.app = Vue.createApp({
       )
     },
 
+    isBulkGrantFormValid() {
+      return !!(
+        this.bulkGrantForm.user_ids &&
+        this.bulkGrantForm.user_ids.length > 0 &&
+        this.bulkGrantForm.account_id &&
+        this.bulkGrantForm.permission_type
+      )
+    },
+
     permissionsByUser() {
       const grouped = new Map()
       for (const perm of this.permissions) {
@@ -296,6 +316,93 @@ window.app = Vue.createApp({
       }
     },
 
+    async bulkGrantPermissions() {
+      if (!this.isBulkGrantFormValid) {
+        this.$q.notify({
+          type: 'warning',
+          message: 'Please fill in all required fields',
+          timeout: 3000
+        })
+        return
+      }
+
+      this.bulkGranting = true
+      this.bulkGrantResults = null
+
+      try {
+        const payload = {
+          user_ids: this.bulkGrantForm.user_ids,
+          account_id: this.bulkGrantForm.account_id,
+          permission_type: this.bulkGrantForm.permission_type
+        }
+
+        if (this.bulkGrantForm.notes) {
+          payload.notes = this.bulkGrantForm.notes
+        }
+
+        if (this.bulkGrantForm.expires_at) {
+          payload.expires_at = new Date(this.bulkGrantForm.expires_at).toISOString()
+        }
+
+        const response = await LNbits.api.request(
+          'POST',
+          '/castle/api/v1/admin/permissions/bulk-grant',
+          this.g.user.wallets[0].adminkey,
+          payload
+        )
+
+        this.bulkGrantResults = response.data
+
+        // Show success notification
+        const message = this.bulkGrantResults.failure_count > 0
+          ? `Bulk grant completed: ${this.bulkGrantResults.success_count} succeeded, ${this.bulkGrantResults.failure_count} failed`
+          : `Successfully granted permissions to ${this.bulkGrantResults.success_count} users`
+
+        this.$q.notify({
+          type: this.bulkGrantResults.failure_count > 0 ? 'warning' : 'positive',
+          message: message,
+          timeout: 5000
+        })
+
+        // Reload permissions to show new grants
+        await this.loadPermissions()
+
+        // Don't close dialog immediately if there were failures
+        // (so user can review errors)
+        if (this.bulkGrantResults.failure_count === 0) {
+          setTimeout(() => {
+            this.closeBulkGrantDialog()
+          }, 2000)
+        }
+      } catch (error) {
+        console.error('Failed to bulk grant permissions:', error)
+        this.$q.notify({
+          type: 'negative',
+          message: 'Failed to bulk grant permissions',
+          caption: error.message || 'Unknown error',
+          timeout: 5000
+        })
+      } finally {
+        this.bulkGranting = false
+      }
+    },
+
+    closeBulkGrantDialog() {
+      this.showBulkGrantDialog = false
+      this.resetBulkGrantForm()
+      this.bulkGrantResults = null
+    },
+
+    resetBulkGrantForm() {
+      this.bulkGrantForm = {
+        user_ids: [],
+        account_id: '',
+        permission_type: 'read',
+        notes: '',
+        expires_at: ''
+      }
+    },
+
     getAccountName(accountId) {
       const account = this.accounts.find(a => a.id === accountId)
       return account ? account.name : accountId
diff --git a/templates/castle/permissions.html b/templates/castle/permissions.html
index 12385c8..91fa6f2 100644
--- a/templates/castle/permissions.html
+++ b/templates/castle/permissions.html
@@ -18,15 +18,36 @@
             <p class="q-mb-none">Manage user access to expense accounts</p>
           </div>
           <div class="col-auto">
-            <q-btn
-              color="primary"
-              icon="add"
-              label="Grant Permission"
-              @click="showGrantDialog = true"
-              :disable="!isSuperUser"
-            >
-              <q-tooltip v-if="!isSuperUser">Admin access required</q-tooltip>
-            </q-btn>
+            <q-btn-group>
+              <q-btn
+                color="primary"
+                icon="add"
+                label="Grant Permission"
+                @click="showGrantDialog = true"
+                :disable="!isSuperUser"
+              >
+                <q-tooltip v-if="!isSuperUser">Admin access required</q-tooltip>
+              </q-btn>
+              <q-btn
+                color="primary"
+                icon="arrow_drop_down"
+                :disable="!isSuperUser"
+              >
+                <q-menu>
+                  <q-list style="min-width: 200px">
+                    <q-item clickable v-close-popup @click="showBulkGrantDialog = true">
+                      <q-item-section avatar>
+                        <q-icon name="group_add"></q-icon>
+                      </q-item-section>
+                      <q-item-section>
+                        <q-item-label>Bulk Grant</q-item-label>
+                        <q-item-label caption>Grant to multiple users</q-item-label>
+                      </q-item-section>
+                    </q-item>
+                  </q-list>
+                </q-menu>
+              </q-btn>
+            </q-btn-group>
           </div>
         </div>
 
@@ -368,6 +389,199 @@
   </q-card>
 </q-dialog>
 
+<!-- Bulk Grant Permission Dialog -->
+<q-dialog v-model="showBulkGrantDialog" position="top">
+  <q-card class="q-pa-lg" style="min-width: 600px">
+    <q-card-section>
+      <div class="text-h6">Bulk Grant Permissions</div>
+      <div class="text-caption text-grey-7">
+        Grant the same permission to multiple users at once. This saves time when onboarding multiple users to the same account.
+      </div>
+    </q-card-section>
+
+    <q-card-section class="q-gutter-md">
+      <!-- Multiple Users -->
+      <q-select
+        v-model="bulkGrantForm.user_ids"
+        label="Users *"
+        hint="Select multiple users (type to search)"
+        :options="userOptions"
+        option-value="id"
+        option-label="label"
+        emit-value
+        map-options
+        use-input
+        use-chips
+        multiple
+        @filter="filterUsers"
+        outlined
+        dense
+        :rules="[val => val && val.length > 0 || 'At least one user is required']"
+      >
+        <template v-slot:prepend>
+          <q-icon name="group"></q-icon>
+        </template>
+        <template v-slot:no-option>
+          <q-item>
+            <q-item-section class="text-grey">
+              No users found
+            </q-item-section>
+          </q-item>
+        </template>
+        <template v-slot:hint>
+          {% raw %}{{ bulkGrantForm.user_ids.length }}{% endraw %} user(s) selected
+        </template>
+      </q-select>
+
+      <!-- Single Account -->
+      <q-select
+        v-model="bulkGrantForm.account_id"
+        label="Account *"
+        hint="Account to grant access to"
+        :options="accountOptions"
+        option-value="id"
+        option-label="name"
+        emit-value
+        map-options
+        outlined
+        dense
+        :rules="[val => !!val || 'Account is required']"
+      >
+        <template v-slot:prepend>
+          <q-icon name="account_balance"></q-icon>
+        </template>
+      </q-select>
+
+      <!-- Permission Type -->
+      <q-select
+        v-model="bulkGrantForm.permission_type"
+        label="Permission Type *"
+        hint="Type of permission to grant"
+        :options="permissionTypeOptions"
+        option-value="value"
+        option-label="label"
+        emit-value
+        map-options
+        outlined
+        dense
+        :rules="[val => !!val || 'Permission type is required']"
+      >
+        <template v-slot:prepend>
+          <q-icon name="security"></q-icon>
+        </template>
+        <template v-slot:option="scope">
+          <q-item v-bind="scope.itemProps">
+            <q-item-section>
+              <q-item-label>{% raw %}{{ scope.opt.label }}{% endraw %}</q-item-label>
+              <q-item-label caption>{% raw %}{{ scope.opt.description }}{% endraw %}</q-item-label>
+            </q-item-section>
+          </q-item>
+        </template>
+      </q-select>
+
+      <!-- Expiration Date (Optional) -->
+      <q-input
+        v-model="bulkGrantForm.expires_at"
+        label="Expiration Date (Optional)"
+        hint="Leave empty for permanent access"
+        type="datetime-local"
+        outlined
+        dense
+      >
+        <template v-slot:prepend>
+          <q-icon name="event"></q-icon>
+        </template>
+      </q-input>
+
+      <!-- Notes (Optional) -->
+      <q-input
+        v-model="bulkGrantForm.notes"
+        label="Notes (Optional)"
+        hint="Optional notes for admin reference"
+        type="textarea"
+        outlined
+        dense
+        rows="3"
+      >
+        <template v-slot:prepend>
+          <q-icon name="note"></q-icon>
+        </template>
+      </q-input>
+
+      <!-- Preview Summary -->
+      <q-banner v-if="isBulkGrantFormValid" class="bg-blue-1 text-blue-9" rounded>
+        <template v-slot:avatar>
+          <q-icon name="info" color="blue"></q-icon>
+        </template>
+        <div>
+          <strong>Preview:</strong> This will grant <strong>{% raw %}{{ getPermissionLabel(bulkGrantForm.permission_type) }}{% endraw %}</strong>
+          permission to <strong>{% raw %}{{ bulkGrantForm.user_ids.length }}{% endraw %} user(s)</strong>
+          on account <strong>{% raw %}{{ getAccountName(bulkGrantForm.account_id) }}{% endraw %}</strong>
+        </div>
+      </q-banner>
+
+      <!-- Results Display (after submission) -->
+      <q-banner v-if="bulkGrantResults" class="q-mt-md" rounded
+        :class="bulkGrantResults.failure_count > 0 ? 'bg-orange-1 text-orange-9' : 'bg-green-1 text-green-9'">
+        <template v-slot:avatar>
+          <q-icon :name="bulkGrantResults.failure_count > 0 ? 'warning' : 'check_circle'"
+            :color="bulkGrantResults.failure_count > 0 ? 'orange' : 'green'"></q-icon>
+        </template>
+        <div>
+          <strong>Results:</strong><br>
+          ✅ <strong>{% raw %}{{ bulkGrantResults.success_count }}{% endraw %}</strong> permissions granted successfully<br>
+          <span v-if="bulkGrantResults.failure_count > 0">
+            ❌ <strong>{% raw %}{{ bulkGrantResults.failure_count }}{% endraw %}</strong> failed
+          </span>
+        </div>
+        <template v-if="bulkGrantResults.failed.length > 0" v-slot:action>
+          <q-btn flat label="View Errors" @click="showBulkGrantErrors = true"></q-btn>
+        </template>
+      </q-banner>
+    </q-card-section>
+
+    <q-card-actions align="right">
+      <q-btn flat label="Cancel" color="grey" @click="closeBulkGrantDialog"></q-btn>
+      <q-btn
+        unelevated
+        label="Bulk Grant"
+        color="primary"
+        icon="group_add"
+        @click="bulkGrantPermissions"
+        :loading="bulkGranting"
+        :disable="!isBulkGrantFormValid"
+      ></q-btn>
+    </q-card-actions>
+  </q-card>
+</q-dialog>
+
+<!-- Bulk Grant Errors Dialog -->
+<q-dialog v-model="showBulkGrantErrors">
+  <q-card style="min-width: 400px">
+    <q-card-section>
+      <div class="text-h6">Bulk Grant Errors</div>
+    </q-card-section>
+
+    <q-card-section v-if="bulkGrantResults">
+      <q-list separator>
+        <q-item v-for="(failure, index) in bulkGrantResults.failed" :key="index">
+          <q-item-section avatar>
+            <q-icon name="error" color="red"></q-icon>
+          </q-item-section>
+          <q-item-section>
+            <q-item-label>{% raw %}{{ failure.user_id }}{% endraw %}</q-item-label>
+            <q-item-label caption class="text-red">{% raw %}{{ failure.error }}{% endraw %}</q-item-label>
+          </q-item-section>
+        </q-item>
+      </q-list>
+    </q-card-section>
+
+    <q-card-actions align="right">
+      <q-btn flat label="Close" color="primary" v-close-popup></q-btn>
+    </q-card-actions>
+  </q-card>
+</q-dialog>
+
 <!-- Revoke Confirmation Dialog -->
 <q-dialog v-model="showRevokeDialog" persistent>
   <q-card>