diff --git a/server/ptc_api_server.py b/server/ptc_api_server.py
index a5a2782..7fc4df5 100644
--- a/server/ptc_api_server.py
+++ b/server/ptc_api_server.py
@@ -1301,6 +1301,8 @@ def build_project_lifecycle_cost(
 
 
 def classify_lifecycle_bucket(account_code: str, project_code: str, project_type: str, meta: dict | None = None) -> str:
+    if (account_code or "").strip() == "724":
+        return "시공비"
     meta = meta or ACCOUNT_MASTER.get(account_code)
     if meta:
         if meta.get("category") == "인건비":