diff --git a/src/seedpass/core/api.py b/src/seedpass/core/api.py
index eb77092..7415bce 100644
--- a/src/seedpass/core/api.py
+++ b/src/seedpass/core/api.py
@@ -488,6 +488,16 @@ class ConfigService:
             "min_lowercase": ("set_min_lowercase", int),
             "min_digits": ("set_min_digits", int),
             "min_special": ("set_min_special", int),
+            "include_special_chars": (
+                "set_include_special_chars",
+                lambda v: v.lower() in ("1", "true", "yes", "y", "on"),
+            ),
+            "allowed_special_chars": ("set_allowed_special_chars", lambda v: v),
+            "special_mode": ("set_special_mode", lambda v: v),
+            "exclude_ambiguous": (
+                "set_exclude_ambiguous",
+                lambda v: v.lower() in ("1", "true", "yes", "y", "on"),
+            ),
             "quick_unlock": (
                 "set_quick_unlock",
                 lambda v: v.lower() in ("1", "true", "yes", "y", "on"),
diff --git a/src/seedpass/core/config_manager.py b/src/seedpass/core/config_manager.py
index a474277..31b469c 100644
--- a/src/seedpass/core/config_manager.py
+++ b/src/seedpass/core/config_manager.py
@@ -58,6 +58,10 @@ class ConfigManager:
                 "min_lowercase": 2,
                 "min_digits": 2,
                 "min_special": 2,
+                "include_special_chars": True,
+                "allowed_special_chars": "",
+                "special_mode": "standard",
+                "exclude_ambiguous": False,
                 "verbose_timing": False,
             }
         try:
@@ -83,6 +87,10 @@ class ConfigManager:
             data.setdefault("min_lowercase", 2)
             data.setdefault("min_digits", 2)
             data.setdefault("min_special", 2)
+            data.setdefault("include_special_chars", True)
+            data.setdefault("allowed_special_chars", "")
+            data.setdefault("special_mode", "standard")
+            data.setdefault("exclude_ambiguous", False)
             data.setdefault("verbose_timing", False)
 
             # Migrate legacy hashed_password.enc if present and password_hash is missing
@@ -259,6 +267,10 @@ class ConfigManager:
             min_lowercase=int(cfg.get("min_lowercase", 2)),
             min_digits=int(cfg.get("min_digits", 2)),
             min_special=int(cfg.get("min_special", 2)),
+            include_special_chars=bool(cfg.get("include_special_chars", True)),
+            allowed_special_chars=cfg.get("allowed_special_chars") or None,
+            special_mode=cfg.get("special_mode") or None,
+            exclude_ambiguous=bool(cfg.get("exclude_ambiguous", False)),
         )
 
     def set_min_uppercase(self, count: int) -> None:
@@ -281,6 +293,30 @@ class ConfigManager:
         cfg["min_special"] = int(count)
         self.save_config(cfg)
 
+    def set_include_special_chars(self, enabled: bool) -> None:
+        """Persist whether special characters are allowed."""
+        cfg = self.load_config(require_pin=False)
+        cfg["include_special_chars"] = bool(enabled)
+        self.save_config(cfg)
+
+    def set_allowed_special_chars(self, chars: str | None) -> None:
+        """Persist the set of allowed special characters."""
+        cfg = self.load_config(require_pin=False)
+        cfg["allowed_special_chars"] = chars or ""
+        self.save_config(cfg)
+
+    def set_special_mode(self, mode: str) -> None:
+        """Persist the special character mode."""
+        cfg = self.load_config(require_pin=False)
+        cfg["special_mode"] = mode
+        self.save_config(cfg)
+
+    def set_exclude_ambiguous(self, enabled: bool) -> None:
+        """Persist whether ambiguous characters are excluded."""
+        cfg = self.load_config(require_pin=False)
+        cfg["exclude_ambiguous"] = bool(enabled)
+        self.save_config(cfg)
+
     def set_quick_unlock(self, enabled: bool) -> None:
         """Persist the quick unlock toggle."""
         cfg = self.load_config(require_pin=False)
diff --git a/src/tests/test_config_manager.py b/src/tests/test_config_manager.py
index c6ee18e..f1f4b0e 100644
--- a/src/tests/test_config_manager.py
+++ b/src/tests/test_config_manager.py
@@ -196,3 +196,43 @@ def test_nostr_retry_settings_round_trip():
         cfg_mgr.set_nostr_retry_delay(3.5)
         assert cfg_mgr.get_nostr_max_retries() == 5
         assert cfg_mgr.get_nostr_retry_delay() == 3.5
+
+
+def test_special_char_settings_round_trip():
+    with TemporaryDirectory() as tmpdir:
+        vault, _ = create_vault(Path(tmpdir), TEST_SEED, TEST_PASSWORD)
+        cfg_mgr = ConfigManager(vault, Path(tmpdir))
+
+        cfg = cfg_mgr.load_config(require_pin=False)
+        assert cfg["include_special_chars"] is True
+        assert cfg["allowed_special_chars"] == ""
+        assert cfg["special_mode"] == "standard"
+        assert cfg["exclude_ambiguous"] is False
+
+        cfg_mgr.set_include_special_chars(False)
+        cfg_mgr.set_allowed_special_chars("@$")
+        cfg_mgr.set_special_mode("safe")
+        cfg_mgr.set_exclude_ambiguous(True)
+
+        cfg2 = cfg_mgr.load_config(require_pin=False)
+        assert cfg2["include_special_chars"] is False
+        assert cfg2["allowed_special_chars"] == "@$"
+        assert cfg2["special_mode"] == "safe"
+        assert cfg2["exclude_ambiguous"] is True
+
+
+def test_password_policy_extended_fields():
+    with TemporaryDirectory() as tmpdir:
+        vault, _ = create_vault(Path(tmpdir), TEST_SEED, TEST_PASSWORD)
+        cfg_mgr = ConfigManager(vault, Path(tmpdir))
+
+        cfg_mgr.set_include_special_chars(False)
+        cfg_mgr.set_allowed_special_chars("()")
+        cfg_mgr.set_special_mode("safe")
+        cfg_mgr.set_exclude_ambiguous(True)
+
+        policy = cfg_mgr.get_password_policy()
+        assert policy.include_special_chars is False
+        assert policy.allowed_special_chars == "()"
+        assert policy.special_mode == "safe"
+        assert policy.exclude_ambiguous is True