diff --git a/database/migrations/2026_05_07_142346_add_permissions_tab_task_to_users.php b/database/migrations/2026_05_07_142346_add_permissions_tab_task_to_users.php
new file mode 100644
index 0000000000..1174327d8b
--- /dev/null
+++ b/database/migrations/2026_05_07_142346_add_permissions_tab_task_to_users.php
@@ -0,0 +1,82 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+use ProcessMaker\Models\User;
+
+return new class extends Migration {
+    private const TAB_TASK_PERMISSIONS = [
+        'overview-tab-task',
+        'summary-tab-task',
+        'completed-tab-task',
+        'form-tab-task',
+        'files-tab-task',
+    ];
+
+    private const CHUNK_SIZE = 500;
+
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        $permissionIds = DB::table('permissions')
+            ->whereIn('name', self::TAB_TASK_PERMISSIONS)
+            ->pluck('id', 'name')
+            ->values();
+
+        foreach ($permissionIds as $permissionId) {
+            $this->assignPermissionToUsers((int) $permissionId);
+        }
+    }
+
+    /**
+     * Reverse the migrations.
+     */
+    public function down(): void
+    {
+        $permissionIds = DB::table('permissions')
+            ->whereIn('name', self::TAB_TASK_PERMISSIONS)
+            ->pluck('id', 'name')
+            ->values();
+
+        DB::table('assignables')
+            ->whereIn('permission_id', $permissionIds)
+            ->where('assignable_type', User::class)
+            ->delete();
+    }
+
+    private function assignPermissionToUsers(int $permissionId): void
+    {
+        $lastUserId = 0;
+
+        do {
+            $users = DB::table('users AS u')
+                ->leftJoin('assignables AS a', function ($join) use ($permissionId) {
+                    $join->on('u.id', '=', 'a.assignable_id')
+                        ->where('a.assignable_type', User::class)
+                        ->where('a.permission_id', $permissionId);
+                })
+                ->whereNull('a.permission_id')
+                ->where('u.id', '>', $lastUserId)
+                ->where('u.is_administrator', false)
+                ->select('u.id')
+                ->orderBy('u.id')
+                ->limit(self::CHUNK_SIZE)
+                ->get();
+
+            if ($users->isEmpty()) {
+                return;
+            }
+
+            $records = $users->map(fn ($user) => [
+                'permission_id' => $permissionId,
+                'assignable_id' => $user->id,
+                'assignable_type' => User::class,
+            ])->all();
+
+            DB::table('assignables')->insert($records);
+            $lastUserId = $users->last()->id;
+        } while ($users->count() === self::CHUNK_SIZE);
+    }
+};
diff --git a/tests/Feature/Migrations/AddPermissionsTabTaskToUsersTest.php b/tests/Feature/Migrations/AddPermissionsTabTaskToUsersTest.php
new file mode 100644
index 0000000000..7e70f1505e
--- /dev/null
+++ b/tests/Feature/Migrations/AddPermissionsTabTaskToUsersTest.php
@@ -0,0 +1,86 @@
+<?php
+
+namespace Tests\Feature\Migrations;
+
+use Database\Seeders\PermissionSeeder;
+use Illuminate\Support\Facades\DB;
+use ProcessMaker\Models\Permission;
+use ProcessMaker\Models\User;
+use Tests\TestCase;
+
+class AddPermissionsTabTaskToUsersTest extends TestCase
+{
+    private const MIGRATION_PATH = 'database/migrations/2026_05_07_142346_add_permissions_tab_task_to_users.php';
+
+    private const TAB_TASK_PERMISSIONS = [
+        'overview-tab-task',
+        'summary-tab-task',
+        'completed-tab-task',
+        'form-tab-task',
+        'files-tab-task',
+    ];
+
+    public function testItAssignsTabTaskPermissionsToNonAdministratorUsersOnly(): void
+    {
+        (new PermissionSeeder)->run();
+
+        [$existingUser, $newUser, $adminUser] = User::withoutEvents(fn () => [
+            User::factory()->create(['is_administrator' => false]),
+            User::factory()->create(['is_administrator' => false]),
+            User::factory()->admin()->create(),
+        ]);
+
+        $existingPermission = Permission::byName('overview-tab-task');
+        $existingUser->permissions()->attach($existingPermission->id);
+
+        $this->migration()->up();
+
+        $this->assertSame($this->tabTaskPermissionIds()->count(), $this->tabTaskPermissionCount($existingUser));
+        $this->assertSame($this->tabTaskPermissionIds()->count(), $this->tabTaskPermissionCount($newUser));
+        $this->assertSame(0, $this->tabTaskPermissionCount($adminUser));
+        $this->assertSame(1, $this->userPermissionCount($existingUser, $existingPermission));
+    }
+
+    public function testItRemovesTabTaskPermissionAssignmentsOnRollback(): void
+    {
+        (new PermissionSeeder)->run();
+
+        $user = User::withoutEvents(fn () => User::factory()->create(['is_administrator' => false]));
+
+        $migration = $this->migration();
+        $migration->up();
+        $migration->down();
+
+        $this->assertSame(0, $this->tabTaskPermissionCount($user));
+    }
+
+    private function migration()
+    {
+        return include base_path(self::MIGRATION_PATH);
+    }
+
+    private function tabTaskPermissionCount(User $user): int
+    {
+        return DB::table('assignables')
+            ->where('assignable_id', $user->id)
+            ->where('assignable_type', User::class)
+            ->whereIn('permission_id', $this->tabTaskPermissionIds())
+            ->count();
+    }
+
+    private function userPermissionCount(User $user, Permission $permission): int
+    {
+        return DB::table('assignables')
+            ->where('assignable_id', $user->id)
+            ->where('assignable_type', User::class)
+            ->where('permission_id', $permission->id)
+            ->count();
+    }
+
+    private function tabTaskPermissionIds()
+    {
+        return Permission::whereIn('name', self::TAB_TASK_PERMISSIONS)
+            ->pluck('id', 'name')
+            ->values();
+    }
+}