diff --git a/kleinanzeigen_bot/__init__.py b/kleinanzeigen_bot/__init__.py
index 8589111..18b5d76 100644
--- a/kleinanzeigen_bot/__init__.py
+++ b/kleinanzeigen_bot/__init__.py
@@ -373,6 +373,8 @@ class KleinanzeigenBot(SeleniumMixin):
         LOG.info("############################################")
 
     def publish_ad(self, ad_file:str, ad_cfg: dict[str, Any], ad_cfg_orig: dict[str, Any]) -> None:
+        self.assert_free_ad_limit_not_reached()
+
         if self.delete_old_ads:
             self.delete_ad(ad_cfg)
 
@@ -532,6 +534,13 @@ class KleinanzeigenBot(SeleniumMixin):
 
         utils.save_dict(ad_file, ad_cfg_orig)
 
+    def assert_free_ad_limit_not_reached(self) -> None:
+        try:
+            self.web_find(By.XPATH, '/html/body/div[1]/form/fieldset[6]/div[1]/header')
+            raise AssertionError(f"Cannot publish more ads. The monthly limit of free ads of account {self.config['login']['username']} is reached.")
+        except NoSuchElementException:
+            pass
+
     @overrides
     def web_open(self, url:str, timeout:float = 15, reload_if_already_open:bool = False) -> None:
         start_at = time.time()