diff --git a/app/Http/Controllers/ClientController.php b/app/Http/Controllers/ClientController.php
index b3eaa66b7e..52b2568eb6 100644
--- a/app/Http/Controllers/ClientController.php
+++ b/app/Http/Controllers/ClientController.php
@@ -218,12 +218,21 @@ class ClientController extends BaseController
     {
         $action = Input::get('action');
         $ids = Input::get('public_id') ? Input::get('public_id') : Input::get('ids');
+
+        if ($action == 'purge' && ! auth()->user()->is_admin) {
+            return redirect('dashboard')->withError(trans('texts.not_authorized'));
+        }
+
         $count = $this->clientService->bulk($ids, $action);
 
         $message = Utils::pluralize($action.'d_client', $count);
         Session::flash('message', $message);
 
-        return $this->returnBulk(ENTITY_CLIENT, $action, $ids);
+        if ($action == 'purge') {
+            return redirect('dashboard')->withMessage($message);
+        } else {
+            return $this->returnBulk(ENTITY_CLIENT, $action, $ids);
+        }
     }
 
     public function statement($clientPublicId, $statusId = false, $startDate = false, $endDate = false)
diff --git a/app/Jobs/PurgeClientData.php b/app/Jobs/PurgeClientData.php
new file mode 100644
index 0000000000..464a6a411c
--- /dev/null
+++ b/app/Jobs/PurgeClientData.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace App\Jobs;
+
+use App\Jobs\Job;
+use App\Models\Invoice;
+use App\Models\LookupAccount;
+use DB;
+use Exception;
+use App\Libraries\HistoryUtils;
+
+class PurgeClientData extends Job
+{
+    public function __construct($client)
+    {
+        $this->client = $client;
+    }
+
+    /**
+     * Execute the job.
+     *
+     * @return void
+     */
+    public function handle()
+    {
+        $invoices = $this->client->invoices()->withTrashed()->get();
+        $expenses = $this->client->expenses()->withTrashed()->get();
+
+        foreach ($invoices as $invoice) {
+            foreach ($invoice->documents as $document) {
+                $document->delete();
+            }
+        }
+        foreach ($expenses as $expense) {
+            foreach ($expense->documents as $document) {
+                $document->delete();
+            }
+        }
+
+        $this->client->forceDelete();
+
+        HistoryUtils::deleteHistory($this->client);
+    }
+}
diff --git a/app/Ninja/Repositories/ActivityRepository.php b/app/Ninja/Repositories/ActivityRepository.php
index 7c94cf7265..f086d8c6e6 100644
--- a/app/Ninja/Repositories/ActivityRepository.php
+++ b/app/Ninja/Repositories/ActivityRepository.php
@@ -30,7 +30,7 @@ class ActivityRepository
 
         $activity->activity_type_id = $activityTypeId;
         $activity->adjustment = $balanceChange;
-        $activity->client_id = $client ? $client->id : 0;
+        $activity->client_id = $client ? $client->id : null;
         $activity->balance = $client ? ($client->balance + $balanceChange) : 0;
         $activity->notes = $notes ?: '';
 
diff --git a/app/Ninja/Repositories/ClientRepository.php b/app/Ninja/Repositories/ClientRepository.php
index 9b41cc206a..a4ea88091b 100644
--- a/app/Ninja/Repositories/ClientRepository.php
+++ b/app/Ninja/Repositories/ClientRepository.php
@@ -2,6 +2,7 @@
 
 namespace App\Ninja\Repositories;
 
+use App\Jobs\PurgeClientData;
 use App\Events\ClientWasCreated;
 use App\Events\ClientWasUpdated;
 use App\Models\Client;
@@ -75,6 +76,11 @@ class ClientRepository extends BaseRepository
         return $query;
     }
 
+    public function purge($client)
+    {
+        dispatch(new PurgeClientData($client));
+    }
+
     public function save($data, $client = null)
     {
         $publicId = isset($data['public_id']) ? $data['public_id'] : false;
diff --git a/database/migrations/2018_03_08_150414_add_slack_notifications.php b/database/migrations/2018_03_08_150414_add_slack_notifications.php
index 75a097976c..fc3e64651c 100644
--- a/database/migrations/2018_03_08_150414_add_slack_notifications.php
+++ b/database/migrations/2018_03_08_150414_add_slack_notifications.php
@@ -25,6 +25,27 @@ class AddSlackNotifications extends Migration
             $table->boolean('auto_archive_quote')->default(false)->nullable();
             $table->boolean('auto_email_invoice')->default(true)->nullable();
         });
+
+        Schema::table('expenses', function ($table) {
+            $table->foreign('client_id')->references('id')->on('clients')->onDelete('cascade');
+        });
+
+        Schema::table('activities', function ($table) {
+            $table->integer('task_id')->unsigned()->change();
+        });
+
+        DB::statement('UPDATE activities SET client_id = NULL WHERE client_id = 0');
+
+        Schema::table('activities', function ($table) {
+            $table->foreign('client_id')->references('id')->on('clients')->onDelete('cascade');
+            $table->foreign('contact_id')->references('id')->on('contacts')->onDelete('cascade');
+            $table->foreign('payment_id')->references('id')->on('payments')->onDelete('cascade');
+            $table->foreign('invoice_id')->references('id')->on('invoices')->onDelete('cascade');
+            $table->foreign('credit_id')->references('id')->on('credits')->onDelete('cascade');
+            $table->foreign('task_id')->references('id')->on('tasks')->onDelete('cascade');
+            $table->foreign('invitation_id')->references('id')->on('invitations')->onDelete('cascade');
+            $table->foreign('expense_id')->references('id')->on('expenses')->onDelete('cascade');
+        });
     }
 
     /**
diff --git a/resources/lang/en/texts.php b/resources/lang/en/texts.php
index df95e495c2..7302896b9b 100644
--- a/resources/lang/en/texts.php
+++ b/resources/lang/en/texts.php
@@ -2786,6 +2786,9 @@ $LANG = array(
     'invoice_workflow' => 'Invoice Workflow',
     'quote_workflow' => 'Quote Workflow',
     'client_must_be_active' => 'Error: the client must be active',
+    'purge_client' => 'Purge Client',
+    'purged_client' => 'Successfully purged client',
+    'purge_client_warning' => 'All related records (invoices, tasks, expenses, documents, etc) will also be deleted.'
 
 );
 
diff --git a/resources/views/clients/show.blade.php b/resources/views/clients/show.blade.php
index bbebc9d46b..dc1373276f 100644
--- a/resources/views/clients/show.blade.php
+++ b/resources/views/clients/show.blade.php
@@ -52,6 +52,8 @@
                             ->withContents([
                               ($client->trashed() ? false : ['label' => trans('texts.archive_client'), 'url' => "javascript:onArchiveClick()"]),
                               ['label' => trans('texts.delete_client'), 'url' => "javascript:onDeleteClick()"],
+                              auth()->user()->is_admin ? \DropdownButton::DIVIDER : false,
+                              auth()->user()->is_admin ? ['label' => trans('texts.purge_client'), 'url' => "javascript:onPurgeClick()"] : false,
                             ]
                           )->split() !!}
                     @endcan
@@ -394,13 +396,20 @@
 		$('.mainForm').submit();
 	}
 
-	function onDeleteClick() {
+    function onDeleteClick() {
 		sweetConfirm(function() {
 			$('#action').val('delete');
 			$('.mainForm').submit();
 		});
 	}
 
+    function onPurgeClick() {
+		sweetConfirm(function() {
+			$('#action').val('purge');
+			$('.mainForm').submit();
+		}, "{{ trans('texts.purge_client_warning') . "\\n\\n" . trans('texts.no_undo') }}");
+	}
+
     function showEmailHistory(email) {
         window.emailBounceId = false;
         $('#emailHistoryModal .panel-body').html("{{ trans('texts.loading') }}...");