diff --git a/backend-deno/routes/activities.ts b/backend-deno/routes/activities.ts
index 05bf9a1..c9b6889 100644
--- a/backend-deno/routes/activities.ts
+++ b/backend-deno/routes/activities.ts
@@ -1,6 +1,6 @@
 import { Router } from "@oak/oak";
 import { db } from "../config/database.ts";
-import { authenticateToken } from "../middleware/auth.ts";
+import { authenticateToken, getCurrentUser } from "../middleware/auth.ts";
 
 const router = new Router();
 
@@ -86,9 +86,10 @@ router.get("/:id", authenticateToken, async (ctx) => {
   }
 });
 
-// Create activity (SuperAdmin only)
+// Create activity (SuperAdmin or Supervisor for their own department)
 router.post("/", authenticateToken, async (ctx) => {
   try {
+    const user = getCurrentUser(ctx);
     const body = await ctx.request.body.json();
     const { sub_department_id, name, unit_of_measurement } = body;
     
@@ -98,6 +99,33 @@ router.post("/", authenticateToken, async (ctx) => {
       return;
     }
     
+    // Get the sub-department to check department ownership
+    const subDepts = await db.query<{ department_id: number }[]>(
+      "SELECT department_id FROM sub_departments WHERE id = ?",
+      [sub_department_id]
+    );
+    
+    if (subDepts.length === 0) {
+      ctx.response.status = 404;
+      ctx.response.body = { error: "Sub-department not found" };
+      return;
+    }
+    
+    const subDeptDepartmentId = subDepts[0].department_id;
+    
+    // Check authorization
+    if (user.role === 'Supervisor' && user.departmentId !== subDeptDepartmentId) {
+      ctx.response.status = 403;
+      ctx.response.body = { error: "You can only create activities for your own department" };
+      return;
+    }
+    
+    if (user.role !== 'SuperAdmin' && user.role !== 'Supervisor') {
+      ctx.response.status = 403;
+      ctx.response.body = { error: "Unauthorized" };
+      return;
+    }
+    
     const result = await db.execute(
       "INSERT INTO activities (sub_department_id, name, unit_of_measurement) VALUES (?, ?, ?)",
       [sub_department_id, name, unit_of_measurement || "Per Bag"]
@@ -109,6 +137,12 @@ router.post("/", authenticateToken, async (ctx) => {
       message: "Activity created successfully" 
     };
   } catch (error) {
+    const err = error as { code?: string };
+    if (err.code === "ER_DUP_ENTRY") {
+      ctx.response.status = 400;
+      ctx.response.body = { error: "Activity already exists in this sub-department" };
+      return;
+    }
     console.error("Create activity error:", error);
     ctx.response.status = 500;
     ctx.response.body = { error: "Internal server error" };
@@ -135,11 +169,42 @@ router.put("/:id", authenticateToken, async (ctx) => {
   }
 });
 
-// Delete activity
+// Delete activity (SuperAdmin or Supervisor for their own department)
 router.delete("/:id", authenticateToken, async (ctx) => {
   try {
+    const user = getCurrentUser(ctx);
     const activityId = ctx.params.id;
     
+    // Get the activity and its sub-department to check department ownership
+    const activities = await db.query<Activity[]>(
+      `SELECT a.*, sd.department_id 
+       FROM activities a
+       JOIN sub_departments sd ON a.sub_department_id = sd.id
+       WHERE a.id = ?`,
+      [activityId]
+    );
+    
+    if (activities.length === 0) {
+      ctx.response.status = 404;
+      ctx.response.body = { error: "Activity not found" };
+      return;
+    }
+    
+    const activity = activities[0] as Activity & { department_id: number };
+    
+    // Check authorization
+    if (user.role === 'Supervisor' && user.departmentId !== activity.department_id) {
+      ctx.response.status = 403;
+      ctx.response.body = { error: "You can only delete activities from your own department" };
+      return;
+    }
+    
+    if (user.role !== 'SuperAdmin' && user.role !== 'Supervisor') {
+      ctx.response.status = 403;
+      ctx.response.body = { error: "Unauthorized" };
+      return;
+    }
+    
     await db.execute("DELETE FROM activities WHERE id = ?", [activityId]);
     
     ctx.response.body = { message: "Activity deleted successfully" };
diff --git a/backend-deno/routes/departments.ts b/backend-deno/routes/departments.ts
index ac20dce..b1d7245 100644
--- a/backend-deno/routes/departments.ts
+++ b/backend-deno/routes/departments.ts
@@ -101,35 +101,140 @@ router.post("/", authenticateToken, authorize("SuperAdmin"), async (ctx) => {
   }
 });
 
-// Create sub-department (SuperAdmin only)
-router.post("/:id/sub-departments", authenticateToken, authorize("SuperAdmin"), async (ctx) => {
+// Create sub-department (SuperAdmin or Supervisor for their own department)
+router.post("/sub-departments", authenticateToken, async (ctx) => {
   try {
-    const deptId = ctx.params.id;
-    const body = await ctx.request.body.json() as { name: string; primaryActivity: string };
-    const { name, primaryActivity } = body;
+    const user = getCurrentUser(ctx);
+    const body = await ctx.request.body.json() as { department_id: number; name: string };
+    const { department_id, name } = body;
     
-    if (!name || !primaryActivity) {
+    if (!name || !department_id) {
       ctx.response.status = 400;
-      ctx.response.body = { error: "Name and primary activity required" };
+      ctx.response.body = { error: "Department ID and name are required" };
+      return;
+    }
+
+    // Check authorization
+    if (user.role === 'Supervisor' && user.departmentId !== department_id) {
+      ctx.response.status = 403;
+      ctx.response.body = { error: "You can only create sub-departments for your own department" };
+      return;
+    }
+    
+    if (user.role !== 'SuperAdmin' && user.role !== 'Supervisor') {
+      ctx.response.status = 403;
+      ctx.response.body = { error: "Unauthorized" };
       return;
     }
     
     const sanitizedName = sanitizeInput(name);
-    const sanitizedActivity = sanitizeInput(primaryActivity);
     
     const result = await db.execute(
-      "INSERT INTO sub_departments (department_id, name, primary_activity) VALUES (?, ?, ?)",
-      [deptId, sanitizedName, sanitizedActivity]
+      "INSERT INTO sub_departments (department_id, name) VALUES (?, ?)",
+      [department_id, sanitizedName]
     );
     
     const newSubDepartment = await db.query<SubDepartment[]>(
       "SELECT * FROM sub_departments WHERE id = ?",
-      [result.insertId]
+      [result.lastInsertId]
     );
     
     ctx.response.status = 201;
     ctx.response.body = newSubDepartment[0];
   } catch (error) {
+    const err = error as { code?: string };
+    if (err.code === "ER_DUP_ENTRY") {
+      ctx.response.status = 400;
+      ctx.response.body = { error: "Sub-department already exists in this department" };
+      return;
+    }
+    console.error("Create sub-department error:", error);
+    ctx.response.status = 500;
+    ctx.response.body = { error: "Internal server error" };
+  }
+});
+
+// Delete sub-department (SuperAdmin or Supervisor for their own department)
+router.delete("/sub-departments/:id", authenticateToken, async (ctx) => {
+  try {
+    const user = getCurrentUser(ctx);
+    const subDeptId = ctx.params.id;
+    
+    // Get the sub-department to check department ownership
+    const subDepts = await db.query<SubDepartment[]>(
+      "SELECT * FROM sub_departments WHERE id = ?",
+      [subDeptId]
+    );
+    
+    if (subDepts.length === 0) {
+      ctx.response.status = 404;
+      ctx.response.body = { error: "Sub-department not found" };
+      return;
+    }
+    
+    const subDept = subDepts[0];
+    
+    // Check authorization
+    if (user.role === 'Supervisor' && user.departmentId !== subDept.department_id) {
+      ctx.response.status = 403;
+      ctx.response.body = { error: "You can only delete sub-departments from your own department" };
+      return;
+    }
+    
+    if (user.role !== 'SuperAdmin' && user.role !== 'Supervisor') {
+      ctx.response.status = 403;
+      ctx.response.body = { error: "Unauthorized" };
+      return;
+    }
+    
+    // Delete associated activities first (cascade should handle this, but being explicit)
+    await db.execute("DELETE FROM activities WHERE sub_department_id = ?", [subDeptId]);
+    
+    // Delete the sub-department
+    await db.execute("DELETE FROM sub_departments WHERE id = ?", [subDeptId]);
+    
+    ctx.response.body = { message: "Sub-department deleted successfully" };
+  } catch (error) {
+    console.error("Delete sub-department error:", error);
+    ctx.response.status = 500;
+    ctx.response.body = { error: "Internal server error" };
+  }
+});
+
+// Legacy route for creating sub-department under specific department (SuperAdmin only)
+router.post("/:id/sub-departments", authenticateToken, authorize("SuperAdmin"), async (ctx) => {
+  try {
+    const deptId = ctx.params.id;
+    const body = await ctx.request.body.json() as { name: string };
+    const { name } = body;
+    
+    if (!name) {
+      ctx.response.status = 400;
+      ctx.response.body = { error: "Name is required" };
+      return;
+    }
+    
+    const sanitizedName = sanitizeInput(name);
+    
+    const result = await db.execute(
+      "INSERT INTO sub_departments (department_id, name) VALUES (?, ?)",
+      [deptId, sanitizedName]
+    );
+    
+    const newSubDepartment = await db.query<SubDepartment[]>(
+      "SELECT * FROM sub_departments WHERE id = ?",
+      [result.lastInsertId]
+    );
+    
+    ctx.response.status = 201;
+    ctx.response.body = newSubDepartment[0];
+  } catch (error) {
+    const err = error as { code?: string };
+    if (err.code === "ER_DUP_ENTRY") {
+      ctx.response.status = 400;
+      ctx.response.body = { error: "Sub-department already exists in this department" };
+      return;
+    }
     console.error("Create sub-department error:", error);
     ctx.response.status = 500;
     ctx.response.body = { error: "Internal server error" };
diff --git a/src/App.tsx b/src/App.tsx
index 96fec0d..44a873c 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -12,8 +12,9 @@ import { LoginPage } from './pages/LoginPage';
 import { ReportingPage } from './pages/ReportingPage';
 import { StandardRatesPage } from './pages/StandardRatesPage';
 import { AllRatesPage } from './pages/AllRatesPage';
+import { ActivitiesPage } from './pages/ActivitiesPage';
 
-type PageType = 'dashboard' | 'users' | 'allocation' | 'attendance' | 'rates' | 'swaps' | 'reports' | 'standard-rates' | 'all-rates';
+type PageType = 'dashboard' | 'users' | 'allocation' | 'attendance' | 'rates' | 'swaps' | 'reports' | 'standard-rates' | 'all-rates' | 'activities';
 
 const AppContent: React.FC = () => {
   const [activePage, setActivePage] = useState<PageType>('dashboard');
@@ -39,6 +40,8 @@ const AppContent: React.FC = () => {
         return <StandardRatesPage />;
       case 'all-rates':
         return <AllRatesPage />;
+      case 'activities':
+        return <ActivitiesPage />;
       default:
         return <DashboardPage />;
     }
diff --git a/src/components/layout/Sidebar.tsx b/src/components/layout/Sidebar.tsx
index 4f5c5e9..6097d84 100644
--- a/src/components/layout/Sidebar.tsx
+++ b/src/components/layout/Sidebar.tsx
@@ -1,5 +1,5 @@
 import React from 'react';
-import { LayoutDashboard, Users, Briefcase, CalendarCheck, DollarSign, ClipboardList, ArrowRightLeft, FileSpreadsheet, Scale, Eye } from 'lucide-react';
+import { LayoutDashboard, Users, Briefcase, CalendarCheck, DollarSign, ClipboardList, ArrowRightLeft, FileSpreadsheet, Scale, Eye, Layers } from 'lucide-react';
 import { useAuth } from '../../contexts/AuthContext';
 
 interface SidebarItemProps {
@@ -142,6 +142,16 @@ export const Sidebar: React.FC<SidebarProps> = ({ activePage, onNavigate }) => {
             onClick={() => onNavigate('all-rates')}
           />
         )}
+        
+        {/* Activities Management - SuperAdmin and Supervisor */}
+        {(isSuperAdmin || isSupervisor) && (
+          <SidebarItem
+            icon={Layers}
+            label="Activities"
+            active={activePage === 'activities'}
+            onClick={() => onNavigate('activities')}
+          />
+        )}
       </nav>
       
       {/* Role indicator at bottom */}
diff --git a/src/hooks/useActivities.ts b/src/hooks/useActivities.ts
new file mode 100644
index 0000000..a23bc06
--- /dev/null
+++ b/src/hooks/useActivities.ts
@@ -0,0 +1,64 @@
+import { useState, useEffect, useCallback } from 'react';
+import { api } from '../services/api';
+import { Activity } from '../types';
+
+export const useActivities = (subDepartmentId?: string | number) => {
+  const [activities, setActivities] = useState<Activity[]>([]);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const fetchActivities = useCallback(async () => {
+    setLoading(true);
+    setError(null);
+    try {
+      const params: { subDepartmentId?: number; departmentId?: number } = {};
+      if (subDepartmentId) {
+        params.subDepartmentId = Number(subDepartmentId);
+      }
+      const data = await api.getActivities(params);
+      setActivities(data);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to fetch activities');
+      setActivities([]);
+    } finally {
+      setLoading(false);
+    }
+  }, [subDepartmentId]);
+
+  useEffect(() => {
+    fetchActivities();
+  }, [fetchActivities]);
+
+  return { activities, loading, error, refresh: fetchActivities };
+};
+
+export const useActivitiesByDepartment = (departmentId?: string | number) => {
+  const [activities, setActivities] = useState<Activity[]>([]);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  const fetchActivities = useCallback(async () => {
+    if (!departmentId) {
+      setActivities([]);
+      return;
+    }
+    
+    setLoading(true);
+    setError(null);
+    try {
+      const data = await api.getActivities({ departmentId: Number(departmentId) });
+      setActivities(data);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to fetch activities');
+      setActivities([]);
+    } finally {
+      setLoading(false);
+    }
+  }, [departmentId]);
+
+  useEffect(() => {
+    fetchActivities();
+  }, [fetchActivities]);
+
+  return { activities, loading, error, refresh: fetchActivities };
+};
diff --git a/src/pages/ActivitiesPage.tsx b/src/pages/ActivitiesPage.tsx
new file mode 100644
index 0000000..68b0c8b
--- /dev/null
+++ b/src/pages/ActivitiesPage.tsx
@@ -0,0 +1,416 @@
+import React, { useState, useEffect } from 'react';
+import { Plus, RefreshCw, Trash2, Layers, Activity as ActivityIcon } from 'lucide-react';
+import { Card, CardHeader, CardContent } from '../components/ui/Card';
+import { Table, TableHeader, TableBody, TableRow, TableHead, TableCell } from '../components/ui/Table';
+import { Button } from '../components/ui/Button';
+import { Input, Select } from '../components/ui/Input';
+import { useDepartments, useSubDepartments } from '../hooks/useDepartments';
+import { useActivitiesByDepartment } from '../hooks/useActivities';
+import { useAuth } from '../contexts/AuthContext';
+import { api } from '../services/api';
+import { SubDepartment, Activity } from '../types';
+
+export const ActivitiesPage: React.FC = () => {
+  const [activeTab, setActiveTab] = useState<'subDepartments' | 'activities'>('subDepartments');
+  const { user } = useAuth();
+  const { departments } = useDepartments();
+  
+  // Role-based access
+  const isSupervisor = user?.role === 'Supervisor';
+  const isSuperAdmin = user?.role === 'SuperAdmin';
+  const canAccess = isSupervisor || isSuperAdmin;
+
+  // Department selection - supervisors are locked to their department
+  const [selectedDeptId, setSelectedDeptId] = useState<string>('');
+  
+  // Get sub-departments and activities for selected department
+  const { subDepartments, refresh: refreshSubDepts } = useSubDepartments(selectedDeptId);
+  const { activities, refresh: refreshActivities } = useActivitiesByDepartment(selectedDeptId);
+
+  // Form states
+  const [subDeptForm, setSubDeptForm] = useState({ name: '' });
+  const [activityForm, setActivityForm] = useState({ 
+    subDepartmentId: '', 
+    name: '', 
+    unitOfMeasurement: 'Per Bag' as 'Per Bag' | 'Fixed Rate-Per Person'
+  });
+  
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState('');
+  const [success, setSuccess] = useState('');
+
+  // Auto-select department for supervisors
+  useEffect(() => {
+    if (isSupervisor && user?.department_id) {
+      setSelectedDeptId(String(user.department_id));
+    }
+  }, [isSupervisor, user?.department_id]);
+
+  // Clear messages after 3 seconds
+  useEffect(() => {
+    if (success || error) {
+      const timer = setTimeout(() => {
+        setSuccess('');
+        setError('');
+      }, 3000);
+      return () => clearTimeout(timer);
+    }
+  }, [success, error]);
+
+  const handleCreateSubDepartment = async () => {
+    if (!subDeptForm.name.trim()) {
+      setError('Sub-department name is required');
+      return;
+    }
+    if (!selectedDeptId) {
+      setError('Please select a department first');
+      return;
+    }
+
+    setLoading(true);
+    setError('');
+    try {
+      await api.createSubDepartment({
+        department_id: parseInt(selectedDeptId),
+        name: subDeptForm.name.trim()
+      });
+      setSuccess('Sub-department created successfully');
+      setSubDeptForm({ name: '' });
+      refreshSubDepts();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to create sub-department');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const handleDeleteSubDepartment = async (id: number) => {
+    if (!confirm('Are you sure you want to delete this sub-department? This will also delete all associated activities.')) {
+      return;
+    }
+
+    setLoading(true);
+    try {
+      await api.deleteSubDepartment(id);
+      setSuccess('Sub-department deleted successfully');
+      refreshSubDepts();
+      refreshActivities();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to delete sub-department');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const handleCreateActivity = async () => {
+    if (!activityForm.name.trim()) {
+      setError('Activity name is required');
+      return;
+    }
+    if (!activityForm.subDepartmentId) {
+      setError('Please select a sub-department');
+      return;
+    }
+
+    setLoading(true);
+    setError('');
+    try {
+      await api.createActivity({
+        sub_department_id: parseInt(activityForm.subDepartmentId),
+        name: activityForm.name.trim(),
+        unit_of_measurement: activityForm.unitOfMeasurement
+      });
+      setSuccess('Activity created successfully');
+      setActivityForm({ subDepartmentId: '', name: '', unitOfMeasurement: 'Per Bag' });
+      refreshActivities();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to create activity');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const handleDeleteActivity = async (id: number) => {
+    if (!confirm('Are you sure you want to delete this activity?')) {
+      return;
+    }
+
+    setLoading(true);
+    try {
+      await api.deleteActivity(id);
+      setSuccess('Activity deleted successfully');
+      refreshActivities();
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to delete activity');
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  if (!canAccess) {
+    return (
+      <div className="p-6">
+        <Card>
+          <CardContent>
+            <p className="text-red-600">You do not have permission to access this page.</p>
+          </CardContent>
+        </Card>
+      </div>
+    );
+  }
+
+  const selectedDeptName = departments.find(d => d.id === parseInt(selectedDeptId))?.name || '';
+
+  return (
+    <div className="p-6 space-y-6">
+      <Card>
+        <CardHeader>
+          <div className="flex items-center justify-between">
+            <div className="flex items-center gap-3">
+              <Layers className="h-6 w-6 text-blue-600" />
+              <h2 className="text-xl font-semibold text-gray-800">Manage Activities & Sub-Departments</h2>
+            </div>
+            <Button
+              variant="outline"
+              size="sm"
+              onClick={() => { refreshSubDepts(); refreshActivities(); }}
+              disabled={loading}
+            >
+              <RefreshCw className={`h-4 w-4 mr-2 ${loading ? 'animate-spin' : ''}`} />
+              Refresh
+            </Button>
+          </div>
+        </CardHeader>
+
+        <CardContent>
+          {/* Department Selection */}
+          <div className="mb-6">
+            {isSupervisor ? (
+              <div>
+                <label className="block text-sm font-medium text-gray-700 mb-1">Department</label>
+                <Input value={selectedDeptName || 'Loading...'} disabled />
+                <p className="text-xs text-gray-500 mt-1">As a supervisor, you can only manage your department's activities.</p>
+              </div>
+            ) : (
+              <Select
+                label="Select Department"
+                value={selectedDeptId}
+                onChange={(e) => setSelectedDeptId(e.target.value)}
+                options={[
+                  { value: '', label: 'Select a Department' },
+                  ...departments.map(d => ({ value: String(d.id), label: d.name }))
+                ]}
+              />
+            )}
+          </div>
+
+          {/* Messages */}
+          {error && (
+            <div className="mb-4 p-3 bg-red-100 text-red-700 rounded-md">
+              {error}
+            </div>
+          )}
+          {success && (
+            <div className="mb-4 p-3 bg-green-100 text-green-700 rounded-md">
+              {success}
+            </div>
+          )}
+
+          {/* Tabs */}
+          <div className="border-b border-gray-200 mb-6">
+            <div className="flex space-x-8">
+              <button
+                onClick={() => setActiveTab('subDepartments')}
+                className={`py-3 px-1 border-b-2 font-medium text-sm ${
+                  activeTab === 'subDepartments'
+                    ? 'border-blue-500 text-blue-600'
+                    : 'border-transparent text-gray-500 hover:text-gray-700'
+                }`}
+              >
+                <Layers className="h-4 w-4 inline mr-2" />
+                Sub-Departments ({subDepartments.length})
+              </button>
+              <button
+                onClick={() => setActiveTab('activities')}
+                className={`py-3 px-1 border-b-2 font-medium text-sm ${
+                  activeTab === 'activities'
+                    ? 'border-blue-500 text-blue-600'
+                    : 'border-transparent text-gray-500 hover:text-gray-700'
+                }`}
+              >
+                <ActivityIcon className="h-4 w-4 inline mr-2" />
+                Activities ({activities.length})
+              </button>
+            </div>
+          </div>
+
+          {!selectedDeptId ? (
+            <p className="text-gray-500 text-center py-8">Please select a department to manage sub-departments and activities.</p>
+          ) : (
+            <>
+              {/* Sub-Departments Tab */}
+              {activeTab === 'subDepartments' && (
+                <div className="space-y-6">
+                  {/* Create Sub-Department Form */}
+                  <div className="bg-gray-50 p-4 rounded-lg">
+                    <h3 className="text-md font-semibold text-gray-700 mb-4">Add New Sub-Department</h3>
+                    <div className="flex gap-4 items-end">
+                      <div className="flex-1">
+                        <Input
+                          label="Sub-Department Name"
+                          value={subDeptForm.name}
+                          onChange={(e) => setSubDeptForm({ name: e.target.value })}
+                          placeholder="e.g., Loading/Unloading, Destoner, Tank"
+                        />
+                      </div>
+                      <Button onClick={handleCreateSubDepartment} disabled={loading}>
+                        <Plus className="h-4 w-4 mr-2" />
+                        Add Sub-Department
+                      </Button>
+                    </div>
+                  </div>
+
+                  {/* Sub-Departments List */}
+                  <Table>
+                    <TableHeader>
+                      <TableRow>
+                        <TableHead>Sub-Department Name</TableHead>
+                        <TableHead>Activities Count</TableHead>
+                        <TableHead>Created At</TableHead>
+                        <TableHead className="text-right">Actions</TableHead>
+                      </TableRow>
+                    </TableHeader>
+                    <TableBody>
+                      {subDepartments.length === 0 ? (
+                        <TableRow>
+                          <TableCell colSpan={4} className="text-center text-gray-500 py-8">
+                            No sub-departments found. Create one above.
+                          </TableCell>
+                        </TableRow>
+                      ) : (
+                        subDepartments.map((subDept: SubDepartment) => {
+                          const activityCount = activities.filter(a => a.sub_department_id === subDept.id).length;
+                          return (
+                            <TableRow key={subDept.id}>
+                              <TableCell className="font-medium">{subDept.name}</TableCell>
+                              <TableCell>{activityCount}</TableCell>
+                              <TableCell>{new Date(subDept.created_at).toLocaleDateString()}</TableCell>
+                              <TableCell className="text-right">
+                                <Button
+                                  variant="ghost"
+                                  size="sm"
+                                  onClick={() => handleDeleteSubDepartment(subDept.id)}
+                                  className="text-red-600 hover:text-red-800"
+                                >
+                                  <Trash2 className="h-4 w-4" />
+                                </Button>
+                              </TableCell>
+                            </TableRow>
+                          );
+                        })
+                      )}
+                    </TableBody>
+                  </Table>
+                </div>
+              )}
+
+              {/* Activities Tab */}
+              {activeTab === 'activities' && (
+                <div className="space-y-6">
+                  {/* Create Activity Form */}
+                  <div className="bg-gray-50 p-4 rounded-lg">
+                    <h3 className="text-md font-semibold text-gray-700 mb-4">Add New Activity</h3>
+                    <div className="grid grid-cols-1 md:grid-cols-4 gap-4 items-end">
+                      <Select
+                        label="Sub-Department"
+                        value={activityForm.subDepartmentId}
+                        onChange={(e) => setActivityForm(prev => ({ ...prev, subDepartmentId: e.target.value }))}
+                        options={[
+                          { value: '', label: 'Select Sub-Department' },
+                          ...subDepartments.map(s => ({ value: String(s.id), label: s.name }))
+                        ]}
+                      />
+                      <Input
+                        label="Activity Name"
+                        value={activityForm.name}
+                        onChange={(e) => setActivityForm(prev => ({ ...prev, name: e.target.value }))}
+                        placeholder="e.g., Mufali Aavak Katai"
+                      />
+                      <Select
+                        label="Unit of Measurement"
+                        value={activityForm.unitOfMeasurement}
+                        onChange={(e) => setActivityForm(prev => ({ 
+                          ...prev, 
+                          unitOfMeasurement: e.target.value as 'Per Bag' | 'Fixed Rate-Per Person'
+                        }))}
+                        options={[
+                          { value: 'Per Bag', label: 'Per Bag' },
+                          { value: 'Fixed Rate-Per Person', label: 'Fixed Rate-Per Person' }
+                        ]}
+                      />
+                      <Button onClick={handleCreateActivity} disabled={loading}>
+                        <Plus className="h-4 w-4 mr-2" />
+                        Add Activity
+                      </Button>
+                    </div>
+                  </div>
+
+                  {/* Activities List */}
+                  <Table>
+                    <TableHeader>
+                      <TableRow>
+                        <TableHead>Activity Name</TableHead>
+                        <TableHead>Sub-Department</TableHead>
+                        <TableHead>Unit of Measurement</TableHead>
+                        <TableHead>Created At</TableHead>
+                        <TableHead className="text-right">Actions</TableHead>
+                      </TableRow>
+                    </TableHeader>
+                    <TableBody>
+                      {activities.length === 0 ? (
+                        <TableRow>
+                          <TableCell colSpan={5} className="text-center text-gray-500 py-8">
+                            No activities found. Create one above.
+                          </TableCell>
+                        </TableRow>
+                      ) : (
+                        activities.map((activity: Activity) => (
+                          <TableRow key={activity.id}>
+                            <TableCell className="font-medium">{activity.name}</TableCell>
+                            <TableCell>{activity.sub_department_name}</TableCell>
+                            <TableCell>
+                              <span className={`px-2 py-1 rounded-full text-xs ${
+                                activity.unit_of_measurement === 'Per Bag' 
+                                  ? 'bg-blue-100 text-blue-800' 
+                                  : 'bg-green-100 text-green-800'
+                              }`}>
+                                {activity.unit_of_measurement}
+                              </span>
+                            </TableCell>
+                            <TableCell>{new Date(activity.created_at).toLocaleDateString()}</TableCell>
+                            <TableCell className="text-right">
+                              <Button
+                                variant="ghost"
+                                size="sm"
+                                onClick={() => handleDeleteActivity(activity.id)}
+                                className="text-red-600 hover:text-red-800"
+                              >
+                                <Trash2 className="h-4 w-4" />
+                              </Button>
+                            </TableCell>
+                          </TableRow>
+                        ))
+                      )}
+                    </TableBody>
+                  </Table>
+                </div>
+              )}
+            </>
+          )}
+        </CardContent>
+      </Card>
+    </div>
+  );
+};
+
+export default ActivitiesPage;
diff --git a/src/pages/WorkAllocationPage.tsx b/src/pages/WorkAllocationPage.tsx
index 7f0d9f6..a86dfce 100644
--- a/src/pages/WorkAllocationPage.tsx
+++ b/src/pages/WorkAllocationPage.tsx
@@ -7,6 +7,7 @@ import { Input, Select, TextArea } from '../components/ui/Input';
 import { useWorkAllocations } from '../hooks/useWorkAllocations';
 import { useDepartments, useSubDepartments } from '../hooks/useDepartments';
 import { useEmployees } from '../hooks/useEmployees';
+import { useActivities } from '../hooks/useActivities';
 import { useAuth } from '../contexts/AuthContext';
 import { api } from '../services/api';
 
@@ -40,6 +41,7 @@ export const WorkAllocationPage: React.FC = () => {
   });
   const [selectedDept, setSelectedDept] = useState('');
   const { subDepartments } = useSubDepartments(selectedDept);
+  const { activities } = useActivities(formData.subDepartmentId);
   const [formError, setFormError] = useState('');
   const [formLoading, setFormLoading] = useState(false);
   const [contractorRates, setContractorRates] = useState<any[]>([]);
@@ -247,12 +249,10 @@ export const WorkAllocationPage: React.FC = () => {
                   name="activity"
                   value={formData.activity}
                   onChange={handleInputChange}
+                  disabled={!formData.subDepartmentId}
                   options={[
-                    { value: '', label: 'Select Activity' },
-                    { value: 'Loading', label: 'Loading' },
-                    { value: 'Unloading', label: 'Unloading' },
-                    { value: 'Standard', label: 'Standard Work' },
-                    { value: 'Other', label: 'Other' },
+                    { value: '', label: formData.subDepartmentId ? 'Select Activity' : 'Select Sub-Department First' },
+                    ...activities.map(a => ({ value: a.name, label: a.name }))
                   ]}
                 />
                 <Input
diff --git a/src/services/api.ts b/src/services/api.ts
index 99c413a..0622a3f 100644
--- a/src/services/api.ts
+++ b/src/services/api.ts
@@ -111,6 +111,20 @@ class ApiService {
     });
   }
 
+  // Sub-Departments
+  async createSubDepartment(data: { department_id: number; name: string }) {
+    return this.request<any>('/departments/sub-departments', {
+      method: 'POST',
+      body: JSON.stringify(data),
+    });
+  }
+
+  async deleteSubDepartment(id: number) {
+    return this.request<{ message: string }>(`/departments/sub-departments/${id}`, {
+      method: 'DELETE',
+    });
+  }
+
   // Work Allocations
   async getWorkAllocations(params?: { employeeId?: number; status?: string; departmentId?: number }) {
     const query = new URLSearchParams(params as any).toString();