diff --git a/Website/main.py b/Website/main.py
index 0412f00..3581428 100644
--- a/Website/main.py
+++ b/Website/main.py
@@ -1904,6 +1904,7 @@ def register():
         email = (request.form.get("email") or "").strip().lower()
         password = request.form.get("password") or ""
         password_repeat = request.form.get("password_repeat") or ""
+        marketing_opt_in = True if request.form.get("marketing_opt_in") == "on" else False
 
         if not username or not school_name or not contact_person or not email or not password or not password_repeat:
             flash("Bitte alle Felder ausfüllen.", "error")
@@ -1936,7 +1937,8 @@ def register():
         try:
             existing_users = user_store.get_all_users() or []
             is_first_user = len(existing_users) == 0
-            if not user_store.add_user(username, password, school_name, contact_person, email):
+            
+            if not user_store.add_user(username, password, school_name, contact_person, email, marketing_opt_in=marketing_opt_in):
                 flash("Benutzer konnte nicht erstellt werden.", "error")
                 return redirect(url_for("register"))
 
diff --git a/Website/templates/register.html b/Website/templates/register.html
index 1959131..93ced13 100644
--- a/Website/templates/register.html
+++ b/Website/templates/register.html
@@ -55,13 +55,18 @@
         display: flex;
         align-items: flex-start;
         gap: 0.6rem;
-        margin: 0.35rem 0 1rem;
+        margin: 1.1rem 0 1.3rem;
         color: #244f66;
+        font-size: 0.95rem;
+        cursor: pointer;
     }
 
-    .checkbox-line input {
-        width: auto;
-        margin-top: 0.2rem;
+    .checkbox-line input[type="checkbox"] {
+        width: 18px;
+        height: 18px;
+        margin-top: 0.1rem;
+        accent-color: #0a5f8f;
+        cursor: pointer;
     }
 
     .auth-btn {
@@ -117,8 +122,13 @@
             <label for="password_repeat">Passwort wiederholen</label>
             <input id="password_repeat" name="password_repeat" type="password" autocomplete="new-password" required>
         </div>
+        <label class="checkbox-line">
+            <input id="marketing_opt_in" name="marketing_opt_in" type="checkbox">
+            <span>Ja, ich möchte E-Mails zu Produktupdates, Neuigkeiten und Marketinginformationen erhalten. (Abmeldung jederzeit möglich)</span>
+        </label>
+
         <button class="auth-btn" type="submit">Konto erstellen</button>
     </form>
     <p class="auth-meta">Bereits registriert? <a href="{{ url_for('login') }}">Zum Login</a></p>
 </section>
-{% endblock %}
+{% endblock %}
\ No newline at end of file