diff --git a/.changelogs/2.3.1/fix-tag-separator-parsing.yml b/.changelogs/2.3.1/fix-tag-separator-parsing.yml
new file mode 100644
index 0000000..d4efd65
--- /dev/null
+++ b/.changelogs/2.3.1/fix-tag-separator-parsing.yml
@@ -0,0 +1,2 @@
+fixed:
+  - Support comma, semicolon, and whitespace tag separators in get_tags_from_guests to align with Proxmox VE API format.
diff --git a/proxlb/models/tags.py b/proxlb/models/tags.py
index 85597ff..21cbb27 100644
--- a/proxlb/models/tags.py
+++ b/proxlb/models/tags.py
@@ -10,6 +10,7 @@
 __license__ = "GPL-3.0"
 
 
+import re
 import time
 from typing import Dict, List, assert_never
 from proxlb.utils.logger import SystemdLogger
@@ -81,7 +82,10 @@ def get_tags_from_guests(proxmox_api: ProxmoxApi, node: str, guest_id: int, gues
         else:
             assert_never(guest_type)
 
-        tags = api_tags.split(";") if isinstance(api_tags, str) else []
+        if isinstance(api_tags, str) and api_tags.strip():
+            tags = [t.strip() for t in re.split(r"[,;\s]+", api_tags.strip()) if t.strip()]
+        else:
+            tags = []
 
         logger.debug("Finished: get_tags_from_guests.")
         return tags
diff --git a/tests/test_tags.py b/tests/test_tags.py
new file mode 100644
index 0000000..d93c072
--- /dev/null
+++ b/tests/test_tags.py
@@ -0,0 +1,50 @@
+import unittest
+from unittest.mock import MagicMock
+from proxlb.models.tags import Tags
+from proxlb.utils.config_parser import Config
+
+GuestType = Config.GuestType
+
+
+class TestTags(unittest.TestCase):
+    def test_get_tags_from_guests_comma_separated(self):
+        proxmox_api = MagicMock()
+        proxmox_api.nodes.return_value.qemu.return_value.config.get.return_value = {
+            "tags": "infra,k8s,plb_anti_affinity_k8s_masters"
+        }
+        tags = Tags.get_tags_from_guests(proxmox_api, "pve01", 111, GuestType.Vm)
+        self.assertEqual(tags, ["infra", "k8s", "plb_anti_affinity_k8s_masters"])
+
+    def test_get_tags_from_guests_comma_with_spaces(self):
+        proxmox_api = MagicMock()
+        proxmox_api.nodes.return_value.qemu.return_value.config.get.return_value = {
+            "tags": "infra, k8s, plb_anti_affinity_k8s_masters"
+        }
+        tags = Tags.get_tags_from_guests(proxmox_api, "pve01", 111, GuestType.Vm)
+        self.assertEqual(tags, ["infra", "k8s", "plb_anti_affinity_k8s_masters"])
+
+    def test_get_tags_from_guests_semicolon_separated(self):
+        proxmox_api = MagicMock()
+        proxmox_api.nodes.return_value.qemu.return_value.config.get.return_value = {
+            "tags": "infra;k8s;plb_anti_affinity_k8s_masters"
+        }
+        tags = Tags.get_tags_from_guests(proxmox_api, "pve01", 111, GuestType.Vm)
+        self.assertEqual(tags, ["infra", "k8s", "plb_anti_affinity_k8s_masters"])
+
+    def test_get_tags_from_guests_lxc_container(self):
+        proxmox_api = MagicMock()
+        proxmox_api.nodes.return_value.lxc.return_value.config.get.return_value = {
+            "tags": "infra,web"
+        }
+        tags = Tags.get_tags_from_guests(proxmox_api, "pve01", 112, GuestType.Ct)
+        self.assertEqual(tags, ["infra", "web"])
+
+    def test_get_tags_from_guests_empty(self):
+        proxmox_api = MagicMock()
+        proxmox_api.nodes.return_value.qemu.return_value.config.get.return_value = {}
+        tags = Tags.get_tags_from_guests(proxmox_api, "pve01", 111, GuestType.Vm)
+        self.assertEqual(tags, [])
+
+
+if __name__ == "__main__":
+    unittest.main()