diff --git a/app/Entities/Projects/Job.php b/app/Entities/Projects/Job.php
index 9987fc4..de2287e 100755
--- a/app/Entities/Projects/Job.php
+++ b/app/Entities/Projects/Job.php
@@ -109,4 +109,11 @@ class Job extends Model
     {
         return $this->price * ($this->progress / 100);
     }
+
+    public function delete()
+    {
+        $this->tasks()->delete();
+
+        return parent::delete();
+    }
 }
diff --git a/app/Entities/Projects/Project.php b/app/Entities/Projects/Project.php
index aa0c956..a07b229 100755
--- a/app/Entities/Projects/Project.php
+++ b/app/Entities/Projects/Project.php
@@ -247,7 +247,9 @@ class Project extends Model
 
     public function delete()
     {
+        $this->jobs->each->delete();
         $this->invoices()->delete();
+        $this->payments()->delete();
 
         return parent::delete();
     }
diff --git a/tests/Unit/Models/JobTest.php b/tests/Unit/Models/JobTest.php
index c2e96c0..b2b342e 100644
--- a/tests/Unit/Models/JobTest.php
+++ b/tests/Unit/Models/JobTest.php
@@ -55,6 +55,19 @@ class JobTest extends TestCase
     }
 
     /** @test */
+    public function job_deletion_also_deletes_related_tasks()
+    {
+        $job = factory(Job::class)->create();
+        $tasks = factory(Task::class)->create(['job_id' => $job->id]);
+
+        $job->delete();
+
+        $this->dontSeeInDatabase('tasks', [
+            'job_id' => $job->id,
+        ]);
+    }
+
+    /** @test */
     public function a_job_has_progress_attribute()
     {
         $job = factory(Job::class)->create();
diff --git a/tests/Unit/Models/ProjectTest.php b/tests/Unit/Models/ProjectTest.php
index 58438ab..733dbdd 100644
--- a/tests/Unit/Models/ProjectTest.php
+++ b/tests/Unit/Models/ProjectTest.php
@@ -42,6 +42,19 @@ class ProjectTest extends TestCase
     }
 
     /** @test */
+    public function project_deletion_also_deletes_related_jobs()
+    {
+        $project = factory(Project::class)->create();
+        $job = factory(Job::class)->create(['project_id' => $project->id]);
+
+        $project->delete();
+
+        $this->dontSeeInDatabase('jobs', [
+            'project_id' => $project->id,
+        ]);
+    }
+
+    /** @test */
     public function a_project_has_many_main_jobs()
     {
         $project = factory(Project::class)->create();
@@ -70,15 +83,43 @@ class ProjectTest extends TestCase
     }
 
     /** @test */
-    public function a_project_has_many_payments()
+    public function project_deletion_also_deletes_related_job_tasks()
+    {
+        $project = factory(Project::class)->create();
+        $job = factory(Job::class)->create(['project_id' => $project->id, 'type_id' => 2]);
+        $tasks = factory(Task::class, 2)->create(['job_id' => $job->id]);
+
+        $project->delete();
+
+        $this->dontSeeInDatabase('tasks', [
+            'job_id' => $job->id,
+        ]);
+    }
+
+    /** @test */
+    public function a_project_has_many_payments_relation()
     {
         $project = factory(Project::class)->create();
         $payment = factory(Payment::class)->create(['project_id' => $project->id]);
+
         $this->assertInstanceOf(Collection::class, $project->payments);
         $this->assertInstanceOf(Payment::class, $project->payments->first());
     }
 
     /** @test */
+    public function project_deletion_also_deletes_related_payments()
+    {
+        $project = factory(Project::class)->create();
+        $payment = factory(Payment::class)->create(['project_id' => $project->id]);
+
+        $project->delete();
+
+        $this->dontSeeInDatabase('payments', [
+            'project_id' => $project->id,
+        ]);
+    }
+
+    /** @test */
     public function a_project_has_many_subscriptions()
     {
         $project = factory(Project::class)->create();