diff --git a/expcs/settings.py b/expcs/settings.py
index edf0760..f272adf 100644
--- a/expcs/settings.py
+++ b/expcs/settings.py
@@ -28,13 +28,20 @@ ALLOWED_HOSTS = ["*"] # Let the web server handle that. That's its job.
 # Application definition
 
 INSTALLED_APPS = [
+    # Django internals
     'django.contrib.admin',
     'django.contrib.auth',
     'django.contrib.contenttypes',
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
+
+    # Third party apps
+    'polymorphic',
+
+    # In-project apps
     'dbsettings',
+    'profiles',
 ]
 
 MIDDLEWARE = [
diff --git a/profiles/__init__.py b/profiles/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/profiles/admin.py b/profiles/admin.py
new file mode 100644
index 0000000..8c38f3f
--- /dev/null
+++ b/profiles/admin.py
@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.
diff --git a/profiles/apps.py b/profiles/apps.py
new file mode 100644
index 0000000..5501fda
--- /dev/null
+++ b/profiles/apps.py
@@ -0,0 +1,5 @@
+from django.apps import AppConfig
+
+
+class ProfilesConfig(AppConfig):
+    name = 'profiles'
diff --git a/profiles/helpers.py b/profiles/helpers.py
new file mode 100644
index 0000000..d143cc5
--- /dev/null
+++ b/profiles/helpers.py
@@ -0,0 +1,5 @@
+CLIENT_PERMISSION_CHOICES = (
+)
+
+OPERATOR_PERMISSION_CHOICES = (
+)
\ No newline at end of file
diff --git a/profiles/models.py b/profiles/models.py
new file mode 100644
index 0000000..a46724a
--- /dev/null
+++ b/profiles/models.py
@@ -0,0 +1,54 @@
+from django.db.models import OneToOneField, SET_NULL, Model, ForeignKey, CASCADE, CharField
+from django.contrib.auth import get_user_model
+
+from polymorphic.models import PolymorphicModel
+from multiselectfield import MultiSelectField
+from django_countries.fields import CountryField
+from vies.types import MEMBER_COUNTRY_CODES, VATIN
+
+from profiles.helpers import CLIENT_PERMISSION_CHOICES, OPERATOR_PERMISSION_CHOICES
+
+# Create your models here.
+
+class Client(Model):
+    company = CharField(max_length=255, blank=True, null=True)
+    country = CountryField()
+    vatid = CharField(max_length=255, blank=True, null=True)
+
+    def validate_vatid(self):
+        if not self.vatid:
+            return -1
+        if self.vatid.lower().startswith("eu"): # pylint: disable=no-member
+            return -2
+        if not (self.vatid.upper()[:2]) in list(MEMBER_COUNTRY_CODES): # pylint: disable=no-member
+            return -3
+        if not ((self.country.code == self.vatid.upper()[:2]) or (self.country.code == "GR" and self.vatid.upper()[:2] == "EL")): # pylint: disable=no-member
+            return -4
+        return 1 if VATIN.from_str(self.vatid).is_valid else 0
+
+    def vatid_data(self, force=False):
+        if force or self.validate_vatid() == 1:
+            return VATIN.from_str(self.vatid).data
+        raise ValueError("VAT ID is not valid or cannot be validated")
+
+class Profile(PolymorphicModel):
+    user = OneToOneField(get_user_model(), on_delete=SET_NULL, null=True)
+    client = ForeignKey(Client, on_delete=CASCADE)
+    first_name = CharField(max_length=255)
+    last_name = CharField(max_length=255)
+
+class ClientProfile(Profile):
+    permissions = MultiSelectField(choices=CLIENT_PERMISSION_CHOICES, null=True)
+    address1 = CharField(max_length=255)
+    address2 = CharField(max_length=255, null=True, blank=True)
+
+class OperatorProfile(Profile):
+    permissions = MultiSelectField(choices=OPERATOR_PERMISSION_CHOICES, null=True)
+
+class ClientPermissionGroup(Model):
+    name = CharField(max_length=255)
+    permissions = MultiSelectField(choices=CLIENT_PERMISSION_CHOICES, null=True)
+
+class OperatorPermissionGroup(Model):
+    name = CharField(max_length=255)
+    permissions = MultiSelectField(choices=OPERATOR_PERMISSION_CHOICES, null=True)
\ No newline at end of file
diff --git a/profiles/tests.py b/profiles/tests.py
new file mode 100644
index 0000000..7ce503c
--- /dev/null
+++ b/profiles/tests.py
@@ -0,0 +1,3 @@
+from django.test import TestCase
+
+# Create your tests here.
diff --git a/profiles/views.py b/profiles/views.py
new file mode 100644
index 0000000..91ea44a
--- /dev/null
+++ b/profiles/views.py
@@ -0,0 +1,3 @@
+from django.shortcuts import render
+
+# Create your views here.
diff --git a/requirements.txt b/requirements.txt
index 118a4dc..97a74b1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,4 @@
 django[argon2]
 mysqlclient
+django-polymorphic
+django-vies
\ No newline at end of file