diff --git a/bbot/scanner/target.py b/bbot/scanner/target.py
index 3420b366b1..7823cb39dd 100644
--- a/bbot/scanner/target.py
+++ b/bbot/scanner/target.py
@@ -82,7 +82,11 @@ def add(self, targets, data=None):
             targets = [targets]
         event_seeds = set()
         for target in targets:
-            event_seed = EventSeed(target)
+            # accept pre-parsed EventSeed objects to avoid expensive re-parsing
+            if isinstance(target, BaseEventSeed):
+                event_seed = target
+            else:
+                event_seed = EventSeed(target)
             if not event_seed._target_type in self.accept_target_types:
                 log.warning(f"Invalid target type for {self.__class__.__name__}: {event_seed.type}")
                 continue
@@ -244,9 +248,9 @@ def __init__(self, seeds=None, target=None, blacklist=None, strict_dns_scope=Fal
         self.target = ScanTarget(*target_list, strict_dns_scope=strict_dns_scope)
 
         # Seeds are only copied from target if target is defined but seeds are NOT defined
-        # Use target.inputs (original inputs) to preserve all inputs, including subdomains
+        # Pass pre-parsed event_seeds to avoid expensive re-parsing of every target string
         if seeds is None:
-            seeds = self.target.inputs
+            seeds = list(self.target.event_seeds)
         self.seeds = ScanSeeds(*list(seeds), strict_dns_scope=strict_dns_scope)
 
         blacklist_list = list(blacklist) if blacklist else []
diff --git a/bbot/test/test_step_1/test_target.py b/bbot/test/test_step_1/test_target.py
index b9b0cd7fa2..138578b793 100644
--- a/bbot/test/test_step_1/test_target.py
+++ b/bbot/test/test_step_1/test_target.py
@@ -413,3 +413,31 @@ async def test_blacklist_regex(bbot_scanner, bbot_httpserver):
     urls = [e.data for e in events if e.type == "URL"]
     assert len(urls) == 1
     assert set(urls) == {"http://127.0.0.1:8888/"}
+
+
+def test_no_double_parsing():
+    """Regression test: when seeds are auto-populated from target, EventSeed parsing
+    should happen only once (via ScanTarget), not twice. BBOTTarget should pass
+    pre-parsed EventSeed objects to ScanSeeds instead of raw strings."""
+    from unittest.mock import patch
+    from bbot.scanner.target import BBOTTarget
+    from bbot.core.event.helpers import EventSeed as _real_EventSeed
+
+    targets = ["evilcorp.com", "1.2.3.4", "https://example.com", "10.0.0.0/24"]
+
+    call_count = 0
+    original_EventSeed = _real_EventSeed
+
+    def counting_EventSeed(input):
+        nonlocal call_count
+        call_count += 1
+        return original_EventSeed(input)
+
+    with patch("bbot.scanner.target.EventSeed", side_effect=counting_EventSeed):
+        BBOTTarget(target=targets)
+
+    # EventSeed should be called once per target (for ScanTarget), not twice
+    assert call_count == len(targets), (
+        f"EventSeed was called {call_count} times for {len(targets)} targets; "
+        f"expected {len(targets)} (seeds should reuse pre-parsed EventSeed objects)"
+    )