diff --git a/jobposting/models.py b/jobposting/models.py
index 6c79dbd..c7e238a 100644
--- a/jobposting/models.py
+++ b/jobposting/models.py
@@ -3,7 +3,14 @@ from django.db import models
 from core.models import MyUser
 from django.utils import timezone
 
+from datetime import timedelta
+
 class JobListing(models.Model):
+    posting_options = [
+        ('M', 'Minimal'),
+        ('S', 'Standard'),
+        ('P', 'Premium'),
+    ]
     status_choices = [
         ('A', 'Aktywna'),
         ('C', 'Zakończona'),
@@ -15,6 +22,7 @@ class JobListing(models.Model):
         ('N', 'Nieoplacona'),
         ('D', 'Inny status')
     ]
+    posting_option = models.CharField(max_length=1, choices=posting_options)
     company_name = models.CharField(max_length=255)
     name = models.CharField(max_length=255)
     content = models.TextField()
@@ -40,6 +48,10 @@ class JobListing(models.Model):
     last_name = models.CharField(max_length=255)
     contact_email = models.EmailField(max_length=255, null=True, blank=True)
 
+    def save(self, *args, **kwargs):
+        if not self.id:
+            self.expiration_date = self.created_at + timedelta(days=45)
+        super().save(*args, **kwargs)
 
     def __str__(self):
         return f"{self.name} at {self.company_name}"
diff --git a/jobposting/serializers.py b/jobposting/serializers.py
index eadd4bf..6924153 100644
--- a/jobposting/serializers.py
+++ b/jobposting/serializers.py
@@ -19,7 +19,8 @@ class JobListingSerializer(serializers.ModelSerializer):
     class Meta:
         model = JobListing
         fields = [
-            'id', 'company_name', 'name', 'content', 'minsalary', 'maxsalary',
+            'id', 'posting_option',
+            'company_name', 'name', 'content', 'minsalary', 'maxsalary',
             'localization', 'created_by', 'created_at', 'status', 'status_paid', 
             'expiration_date', 'experience_level', 'employmentType', 'workFromHome',
             'updated_at', 'job_skills', 'contact_email', 'first_name', 'last_name',