diff --git a/APP/src/app/features/expense/components/expense-form-dialog/expense-form-dialog.component.html b/APP/src/app/features/expense/components/expense-form-dialog/expense-form-dialog.component.html
index b7d7b9a..d5302fc 100644
--- a/APP/src/app/features/expense/components/expense-form-dialog/expense-form-dialog.component.html
+++ b/APP/src/app/features/expense/components/expense-form-dialog/expense-form-dialog.component.html
@@ -59,6 +59,19 @@
       </kendo-dropdownlist>
     </label>
 
+    <!-- Functional Class override -->
+    <label class="flex flex-col gap-1">
+      <span>Functional Class / 功能別</span>
+      <kendo-dropdownlist
+          [data]="functionalClassOptions"
+          textField="label"
+          valueField="value"
+          [valuePrimitive]="true"
+          [defaultItem]="{ value: null, label: '(Inherit ministry / 沿用事工)' }"
+          [(ngModel)]="form.functionalClass">
+      </kendo-dropdownlist>
+    </label>
+
     <!-- Amount -->
     <label class="flex flex-col gap-1">Amount
       <kendo-numerictextbox
diff --git a/APP/src/app/features/expense/components/expense-form-dialog/expense-form-dialog.component.ts b/APP/src/app/features/expense/components/expense-form-dialog/expense-form-dialog.component.ts
index 7cb1bc4..33e295f 100644
--- a/APP/src/app/features/expense/components/expense-form-dialog/expense-form-dialog.component.ts
+++ b/APP/src/app/features/expense/components/expense-form-dialog/expense-form-dialog.component.ts
@@ -12,7 +12,7 @@ import { MemberApiService } from '../../../members/services/member-api.service';
 import { MemberListItemDto, memberDisplayName } from '../../../members/models/member.model';
 import {
   MinistryDto, ExpenseCategoryGroupDto, ExpenseSubCategoryDto, ExpenseType, CreateExpenseRequest,
-  ExpenseListItemDto,
+  ExpenseListItemDto, FunctionalClass,
 } from '../../models/expense.model';
 
 export interface ExpenseFormResult {
@@ -52,6 +52,12 @@ export class ExpenseFormDialogComponent implements OnInit {
   /** Continuous-entry toggle: keep member/ministry/category/date and the dialog open after each save. */
   continueEntry = false;
 
+  readonly functionalClassOptions: { value: FunctionalClass; label: string }[] = [
+    { value: 'Program',           label: 'Program / 事工服務' },
+    { value: 'ManagementGeneral', label: 'Management & General / 管理' },
+    { value: 'Fundraising',       label: 'Fundraising / 募款' },
+  ];
+
   /** The on-behalf reimbursement create flow is the only place continuous entry applies. */
   get showContinueEntry(): boolean {
     return this.mode === 'reimbursement' && this.allowMemberPick && !this.expense;
@@ -67,6 +73,7 @@ export class ExpenseFormDialogComponent implements OnInit {
     checkNumber: '',
     memberId: null as number | null,
     expenseDate: new Date(),
+    functionalClass: null as FunctionalClass | null,
   };
   receipt: File | null = null;
 
@@ -101,6 +108,7 @@ export class ExpenseFormDialogComponent implements OnInit {
       checkNumber: expense.checkNumber ?? '',
       memberId: expense.memberId,
       expenseDate: new Date(year, month - 1, day),
+      functionalClass: expense.functionalClass ?? null,
     };
   }
 
@@ -146,7 +154,7 @@ export class ExpenseFormDialogComponent implements OnInit {
       checkNumber: this.mode === 'vendor' ? (this.form.checkNumber || null) : null,
       expenseDate,
       notes: null,
-      functionalClass: null,
+      functionalClass: this.form.functionalClass,
     };
     // The request and receipt are snapshotted here, so resetting the form right
     // after emitting is safe even though the parent saves asynchronously.