diff --git a/src/modules/expenses/components/admin/GrantPermissionDialog.vue b/src/modules/expenses/components/admin/GrantPermissionDialog.vue
new file mode 100644
index 0000000..20e7d87
--- /dev/null
+++ b/src/modules/expenses/components/admin/GrantPermissionDialog.vue
@@ -0,0 +1,256 @@
+<script setup lang="ts">
+import { ref, computed } from 'vue'
+import { useForm } from 'vee-validate'
+import { toTypedSchema } from '@vee-validate/zod'
+import * as z from 'zod'
+import { useAuth } from '@/composables/useAuthService'
+import { useToast } from '@/core/composables/useToast'
+import { injectService, SERVICE_TOKENS } from '@/core/di-container'
+import type { ExpensesAPI } from '../../services/ExpensesAPI'
+import type { Account } from '../../types'
+import { PermissionType } from '../../types'
+
+import { Button } from '@/components/ui/button'
+import { Dialog, DialogContent, DialogDescription, DialogFooter, DialogHeader, DialogTitle } from '@/components/ui/dialog'
+import {
+  FormControl,
+  FormDescription,
+  FormField,
+  FormItem,
+  FormLabel,
+  FormMessage
+} from '@/components/ui/form'
+import { Input } from '@/components/ui/input'
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select'
+import { Textarea } from '@/components/ui/textarea'
+import { Loader2 } from 'lucide-vue-next'
+
+interface Props {
+  isOpen: boolean
+  accounts: Account[]
+}
+
+const props = defineProps<Props>()
+
+const emit = defineEmits<{
+  close: []
+  permissionGranted: []
+}>()
+
+const { user } = useAuth()
+const toast = useToast()
+const expensesAPI = injectService<ExpensesAPI>(SERVICE_TOKENS.EXPENSES_API)
+
+const isGranting = ref(false)
+
+const adminKey = computed(() => user.value?.wallets?.[0]?.adminkey)
+
+// Form schema
+const formSchema = toTypedSchema(
+  z.object({
+    user_id: z.string().min(1, 'User ID is required'),
+    account_id: z.string().min(1, 'Account is required'),
+    permission_type: z.nativeEnum(PermissionType, {
+      errorMap: () => ({ message: 'Permission type is required' })
+    }),
+    notes: z.string().optional(),
+    expires_at: z.string().optional()
+  })
+)
+
+// Setup form
+const form = useForm({
+  validationSchema: formSchema,
+  initialValues: {
+    user_id: '',
+    account_id: '',
+    permission_type: PermissionType.READ,
+    notes: '',
+    expires_at: ''
+  }
+})
+
+const { resetForm, meta } = form
+const isFormValid = computed(() => meta.value.valid)
+
+// Permission type options
+const permissionTypes = [
+  { value: PermissionType.READ, label: 'Read', description: 'View account and balance' },
+  {
+    value: PermissionType.SUBMIT_EXPENSE,
+    label: 'Submit Expense',
+    description: 'Submit expenses to this account'
+  },
+  { value: PermissionType.MANAGE, label: 'Manage', description: 'Full account management' }
+]
+
+// Submit form
+const onSubmit = form.handleSubmit(async (values) => {
+  if (!adminKey.value) {
+    toast.error('Admin access required')
+    return
+  }
+
+  isGranting.value = true
+
+  try {
+    await expensesAPI.grantPermission(adminKey.value, {
+      user_id: values.user_id,
+      account_id: values.account_id,
+      permission_type: values.permission_type,
+      notes: values.notes || undefined,
+      expires_at: values.expires_at || undefined
+    })
+
+    emit('permissionGranted')
+    resetForm()
+  } catch (error) {
+    console.error('Failed to grant permission:', error)
+    toast.error('Failed to grant permission', {
+      description: error instanceof Error ? error.message : 'Unknown error'
+    })
+  } finally {
+    isGranting.value = false
+  }
+})
+
+// Handle dialog close
+function handleClose() {
+  if (!isGranting.value) {
+    resetForm()
+    emit('close')
+  }
+}
+</script>
+
+<template>
+  <Dialog :open="props.isOpen" @update:open="handleClose">
+    <DialogContent class="sm:max-w-[500px]">
+      <DialogHeader>
+        <DialogTitle>Grant Account Permission</DialogTitle>
+        <DialogDescription>
+          Grant a user permission to access an expense account. Permissions on parent accounts
+          cascade to children.
+        </DialogDescription>
+      </DialogHeader>
+
+      <form @submit="onSubmit" class="space-y-4">
+        <!-- User ID -->
+        <FormField v-slot="{ componentField }" name="user_id">
+          <FormItem>
+            <FormLabel>User ID *</FormLabel>
+            <FormControl>
+              <Input
+                placeholder="Enter user wallet ID"
+                v-bind="componentField"
+                :disabled="isGranting"
+              />
+            </FormControl>
+            <FormDescription>The wallet ID of the user to grant permission to</FormDescription>
+            <FormMessage />
+          </FormItem>
+        </FormField>
+
+        <!-- Account -->
+        <FormField v-slot="{ componentField }" name="account_id">
+          <FormItem>
+            <FormLabel>Account *</FormLabel>
+            <Select v-bind="componentField" :disabled="isGranting">
+              <FormControl>
+                <SelectTrigger>
+                  <SelectValue placeholder="Select account" />
+                </SelectTrigger>
+              </FormControl>
+              <SelectContent>
+                <SelectItem
+                  v-for="account in props.accounts"
+                  :key="account.id"
+                  :value="account.id"
+                >
+                  {{ account.name }}
+                </SelectItem>
+              </SelectContent>
+            </Select>
+            <FormDescription>Account to grant access to</FormDescription>
+            <FormMessage />
+          </FormItem>
+        </FormField>
+
+        <!-- Permission Type -->
+        <FormField v-slot="{ componentField }" name="permission_type">
+          <FormItem>
+            <FormLabel>Permission Type *</FormLabel>
+            <Select v-bind="componentField" :disabled="isGranting">
+              <FormControl>
+                <SelectTrigger>
+                  <SelectValue placeholder="Select permission type" />
+                </SelectTrigger>
+              </FormControl>
+              <SelectContent>
+                <SelectItem
+                  v-for="type in permissionTypes"
+                  :key="type.value"
+                  :value="type.value"
+                >
+                  <div>
+                    <div class="font-medium">{{ type.label }}</div>
+                    <div class="text-sm text-muted-foreground">{{ type.description }}</div>
+                  </div>
+                </SelectItem>
+              </SelectContent>
+            </Select>
+            <FormDescription>Type of permission to grant</FormDescription>
+            <FormMessage />
+          </FormItem>
+        </FormField>
+
+        <!-- Expiration Date (Optional) -->
+        <FormField v-slot="{ componentField }" name="expires_at">
+          <FormItem>
+            <FormLabel>Expiration Date (Optional)</FormLabel>
+            <FormControl>
+              <Input
+                type="datetime-local"
+                v-bind="componentField"
+                :disabled="isGranting"
+              />
+            </FormControl>
+            <FormDescription>Leave empty for permanent access</FormDescription>
+            <FormMessage />
+          </FormItem>
+        </FormField>
+
+        <!-- Notes (Optional) -->
+        <FormField v-slot="{ componentField }" name="notes">
+          <FormItem>
+            <FormLabel>Notes (Optional)</FormLabel>
+            <FormControl>
+              <Textarea
+                placeholder="Add notes about this permission..."
+                v-bind="componentField"
+                :disabled="isGranting"
+              />
+            </FormControl>
+            <FormDescription>Optional notes for admin reference</FormDescription>
+            <FormMessage />
+          </FormItem>
+        </FormField>
+
+        <DialogFooter>
+          <Button
+            type="button"
+            variant="outline"
+            @click="handleClose"
+            :disabled="isGranting"
+          >
+            Cancel
+          </Button>
+          <Button type="submit" :disabled="isGranting || !isFormValid">
+            <Loader2 v-if="isGranting" class="mr-2 h-4 w-4 animate-spin" />
+            {{ isGranting ? 'Granting...' : 'Grant Permission' }}
+          </Button>
+        </DialogFooter>
+      </form>
+    </DialogContent>
+  </Dialog>
+</template>
diff --git a/src/modules/expenses/components/admin/PermissionManager.vue b/src/modules/expenses/components/admin/PermissionManager.vue
new file mode 100644
index 0000000..99eac98
--- /dev/null
+++ b/src/modules/expenses/components/admin/PermissionManager.vue
@@ -0,0 +1,399 @@
+<script setup lang="ts">
+import { ref, onMounted, computed } from 'vue'
+import { useAuth } from '@/composables/useAuthService'
+import { useToast } from '@/core/composables/useToast'
+import { injectService, SERVICE_TOKENS } from '@/core/di-container'
+import type { ExpensesAPI } from '../../services/ExpensesAPI'
+import type { AccountPermission, Account } from '../../types'
+import { PermissionType } from '../../types'
+
+import { Button } from '@/components/ui/button'
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from '@/components/ui/card'
+import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
+import { Badge } from '@/components/ui/badge'
+import { Loader2, Plus, Trash2, Users, Shield } from 'lucide-vue-next'
+import {
+  Table,
+  TableBody,
+  TableCell,
+  TableHead,
+  TableHeader,
+  TableRow
+} from '@/components/ui/table'
+import {
+  AlertDialog,
+  AlertDialogAction,
+  AlertDialogCancel,
+  AlertDialogContent,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogHeader,
+  AlertDialogTitle
+} from '@/components/ui/alert-dialog'
+
+import GrantPermissionDialog from './GrantPermissionDialog.vue'
+
+const { user } = useAuth()
+const toast = useToast()
+const expensesAPI = injectService<ExpensesAPI>(SERVICE_TOKENS.EXPENSES_API)
+
+const permissions = ref<AccountPermission[]>([])
+const accounts = ref<Account[]>([])
+const isLoading = ref(false)
+const showGrantDialog = ref(false)
+const permissionToRevoke = ref<AccountPermission | null>(null)
+const showRevokeDialog = ref(false)
+
+const adminKey = computed(() => user.value?.wallets?.[0]?.adminkey)
+
+// Get permission type badge variant
+function getPermissionBadge(type: PermissionType) {
+  switch (type) {
+    case PermissionType.READ:
+      return 'default'
+    case PermissionType.SUBMIT_EXPENSE:
+      return 'secondary'
+    case PermissionType.MANAGE:
+      return 'destructive'
+    default:
+      return 'outline'
+  }
+}
+
+// Get permission type label
+function getPermissionLabel(type: PermissionType): string {
+  switch (type) {
+    case PermissionType.READ:
+      return 'Read'
+    case PermissionType.SUBMIT_EXPENSE:
+      return 'Submit Expense'
+    case PermissionType.MANAGE:
+      return 'Manage'
+    default:
+      return type
+  }
+}
+
+// Get account name by ID
+function getAccountName(accountId: string): string {
+  const account = accounts.value.find((a) => a.id === accountId)
+  return account?.name || accountId
+}
+
+// Format date
+function formatDate(dateString: string): string {
+  const date = new Date(dateString)
+  return date.toLocaleDateString() + ' ' + date.toLocaleTimeString()
+}
+
+// Load accounts
+async function loadAccounts() {
+  if (!adminKey.value) return
+
+  try {
+    accounts.value = await expensesAPI.getAccounts(adminKey.value)
+  } catch (error) {
+    console.error('Failed to load accounts:', error)
+    toast.error('Failed to load accounts', {
+      description: error instanceof Error ? error.message : 'Unknown error'
+    })
+  }
+}
+
+// Load all permissions
+async function loadPermissions() {
+  if (!adminKey.value) {
+    toast.error('Admin access required', {
+      description: 'You need admin privileges to manage permissions'
+    })
+    return
+  }
+
+  isLoading.value = true
+  try {
+    permissions.value = await expensesAPI.listPermissions(adminKey.value)
+  } catch (error) {
+    console.error('Failed to load permissions:', error)
+    toast.error('Failed to load permissions', {
+      description: error instanceof Error ? error.message : 'Unknown error'
+    })
+  } finally {
+    isLoading.value = false
+  }
+}
+
+// Handle permission granted
+function handlePermissionGranted() {
+  showGrantDialog.value = false
+  loadPermissions()
+  toast.success('Permission granted', {
+    description: 'User permission has been successfully granted'
+  })
+}
+
+// Confirm revoke permission
+function confirmRevoke(permission: AccountPermission) {
+  permissionToRevoke.value = permission
+  showRevokeDialog.value = true
+}
+
+// Revoke permission
+async function revokePermission() {
+  if (!adminKey.value || !permissionToRevoke.value) return
+
+  try {
+    await expensesAPI.revokePermission(adminKey.value, permissionToRevoke.value.id)
+    toast.success('Permission revoked', {
+      description: 'User permission has been successfully revoked'
+    })
+    loadPermissions()
+  } catch (error) {
+    console.error('Failed to revoke permission:', error)
+    toast.error('Failed to revoke permission', {
+      description: error instanceof Error ? error.message : 'Unknown error'
+    })
+  } finally {
+    showRevokeDialog.value = false
+    permissionToRevoke.value = null
+  }
+}
+
+// Group permissions by user
+const permissionsByUser = computed(() => {
+  const grouped = new Map<string, AccountPermission[]>()
+
+  for (const permission of permissions.value) {
+    const existing = grouped.get(permission.user_id) || []
+    existing.push(permission)
+    grouped.set(permission.user_id, existing)
+  }
+
+  return grouped
+})
+
+// Group permissions by account
+const permissionsByAccount = computed(() => {
+  const grouped = new Map<string, AccountPermission[]>()
+
+  for (const permission of permissions.value) {
+    const existing = grouped.get(permission.account_id) || []
+    existing.push(permission)
+    grouped.set(permission.account_id, existing)
+  }
+
+  return grouped
+})
+
+onMounted(() => {
+  loadAccounts()
+  loadPermissions()
+})
+</script>
+
+<template>
+  <div class="container mx-auto p-6 space-y-6">
+    <div class="flex items-center justify-between">
+      <div>
+        <h1 class="text-3xl font-bold">Permission Management</h1>
+        <p class="text-muted-foreground">
+          Manage user access to expense accounts
+        </p>
+      </div>
+      <Button @click="showGrantDialog = true" :disabled="isLoading">
+        <Plus class="mr-2 h-4 w-4" />
+        Grant Permission
+      </Button>
+    </div>
+
+    <Card>
+      <CardHeader>
+        <CardTitle class="flex items-center gap-2">
+          <Shield class="h-5 w-5" />
+          Account Permissions
+        </CardTitle>
+        <CardDescription>
+          View and manage all account permissions. Permissions on parent accounts cascade to
+          children.
+        </CardDescription>
+      </CardHeader>
+      <CardContent>
+        <Tabs default-value="by-user" class="w-full">
+          <TabsList class="grid w-full grid-cols-2">
+            <TabsTrigger value="by-user">
+              <Users class="mr-2 h-4 w-4" />
+              By User
+            </TabsTrigger>
+            <TabsTrigger value="by-account">
+              <Shield class="mr-2 h-4 w-4" />
+              By Account
+            </TabsTrigger>
+          </TabsList>
+
+          <!-- By User View -->
+          <TabsContent value="by-user" class="space-y-4">
+            <div v-if="isLoading" class="flex items-center justify-center py-8">
+              <Loader2 class="h-8 w-8 animate-spin text-muted-foreground" />
+            </div>
+
+            <div v-else-if="permissionsByUser.size === 0" class="text-center py-8">
+              <p class="text-muted-foreground">No permissions granted yet</p>
+            </div>
+
+            <div v-else class="space-y-4">
+              <div
+                v-for="[userId, userPermissions] in permissionsByUser"
+                :key="userId"
+                class="border rounded-lg p-4"
+              >
+                <h3 class="font-semibold mb-2">User: {{ userId }}</h3>
+                <Table>
+                  <TableHeader>
+                    <TableRow>
+                      <TableHead>Account</TableHead>
+                      <TableHead>Permission</TableHead>
+                      <TableHead>Granted</TableHead>
+                      <TableHead>Expires</TableHead>
+                      <TableHead>Notes</TableHead>
+                      <TableHead class="text-right">Actions</TableHead>
+                    </TableRow>
+                  </TableHeader>
+                  <TableBody>
+                    <TableRow v-for="permission in userPermissions" :key="permission.id">
+                      <TableCell class="font-medium">
+                        {{ getAccountName(permission.account_id) }}
+                      </TableCell>
+                      <TableCell>
+                        <Badge :variant="getPermissionBadge(permission.permission_type)">
+                          {{ getPermissionLabel(permission.permission_type) }}
+                        </Badge>
+                      </TableCell>
+                      <TableCell>{{ formatDate(permission.granted_at) }}</TableCell>
+                      <TableCell>
+                        {{ permission.expires_at ? formatDate(permission.expires_at) : 'Never' }}
+                      </TableCell>
+                      <TableCell>
+                        <span class="text-sm text-muted-foreground">
+                          {{ permission.notes || '-' }}
+                        </span>
+                      </TableCell>
+                      <TableCell class="text-right">
+                        <Button
+                          variant="ghost"
+                          size="sm"
+                          @click="confirmRevoke(permission)"
+                          :disabled="isLoading"
+                        >
+                          <Trash2 class="h-4 w-4 text-destructive" />
+                        </Button>
+                      </TableCell>
+                    </TableRow>
+                  </TableBody>
+                </Table>
+              </div>
+            </div>
+          </TabsContent>
+
+          <!-- By Account View -->
+          <TabsContent value="by-account" class="space-y-4">
+            <div v-if="isLoading" class="flex items-center justify-center py-8">
+              <Loader2 class="h-8 w-8 animate-spin text-muted-foreground" />
+            </div>
+
+            <div v-else-if="permissionsByAccount.size === 0" class="text-center py-8">
+              <p class="text-muted-foreground">No permissions granted yet</p>
+            </div>
+
+            <div v-else class="space-y-4">
+              <div
+                v-for="[accountId, accountPermissions] in permissionsByAccount"
+                :key="accountId"
+                class="border rounded-lg p-4"
+              >
+                <h3 class="font-semibold mb-2">Account: {{ getAccountName(accountId) }}</h3>
+                <Table>
+                  <TableHeader>
+                    <TableRow>
+                      <TableHead>User</TableHead>
+                      <TableHead>Permission</TableHead>
+                      <TableHead>Granted</TableHead>
+                      <TableHead>Expires</TableHead>
+                      <TableHead>Notes</TableHead>
+                      <TableHead class="text-right">Actions</TableHead>
+                    </TableRow>
+                  </TableHeader>
+                  <TableBody>
+                    <TableRow v-for="permission in accountPermissions" :key="permission.id">
+                      <TableCell class="font-medium">{{ permission.user_id }}</TableCell>
+                      <TableCell>
+                        <Badge :variant="getPermissionBadge(permission.permission_type)">
+                          {{ getPermissionLabel(permission.permission_type) }}
+                        </Badge>
+                      </TableCell>
+                      <TableCell>{{ formatDate(permission.granted_at) }}</TableCell>
+                      <TableCell>
+                        {{ permission.expires_at ? formatDate(permission.expires_at) : 'Never' }}
+                      </TableCell>
+                      <TableCell>
+                        <span class="text-sm text-muted-foreground">
+                          {{ permission.notes || '-' }}
+                        </span>
+                      </TableCell>
+                      <TableCell class="text-right">
+                        <Button
+                          variant="ghost"
+                          size="sm"
+                          @click="confirmRevoke(permission)"
+                          :disabled="isLoading"
+                        >
+                          <Trash2 class="h-4 w-4 text-destructive" />
+                        </Button>
+                      </TableCell>
+                    </TableRow>
+                  </TableBody>
+                </Table>
+              </div>
+            </div>
+          </TabsContent>
+        </Tabs>
+      </CardContent>
+    </Card>
+
+    <!-- Grant Permission Dialog -->
+    <GrantPermissionDialog
+      :is-open="showGrantDialog"
+      :accounts="accounts"
+      @close="showGrantDialog = false"
+      @permission-granted="handlePermissionGranted"
+    />
+
+    <!-- Revoke Confirmation Dialog -->
+    <AlertDialog :open="showRevokeDialog" @update:open="showRevokeDialog = $event">
+      <AlertDialogContent>
+        <AlertDialogHeader>
+          <AlertDialogTitle>Revoke Permission?</AlertDialogTitle>
+          <AlertDialogDescription>
+            Are you sure you want to revoke this permission? The user will immediately lose access.
+            <div v-if="permissionToRevoke" class="mt-4 p-4 bg-muted rounded-md">
+              <p class="font-medium">Permission Details:</p>
+              <p class="text-sm mt-2">
+                <strong>User:</strong> {{ permissionToRevoke.user_id }}
+              </p>
+              <p class="text-sm">
+                <strong>Account:</strong> {{ getAccountName(permissionToRevoke.account_id) }}
+              </p>
+              <p class="text-sm">
+                <strong>Type:</strong> {{ getPermissionLabel(permissionToRevoke.permission_type) }}
+              </p>
+            </div>
+          </AlertDialogDescription>
+        </AlertDialogHeader>
+        <AlertDialogFooter>
+          <AlertDialogCancel>Cancel</AlertDialogCancel>
+          <AlertDialogAction @click="revokePermission" class="bg-destructive text-destructive-foreground hover:bg-destructive/90">
+            Revoke
+          </AlertDialogAction>
+        </AlertDialogFooter>
+      </AlertDialogContent>
+    </AlertDialog>
+  </div>
+</template>