diff --git a/Source/UI/PriceCommission.cpp b/Source/UI/PriceCommission.cpp
new file mode 100644
index 0000000..2f2fcc1
--- /dev/null
+++ b/Source/UI/PriceCommission.cpp
@@ -0,0 +1,6 @@
+#include <cstdint>
+
+// FUNCTION: fn_00161
+int PriceCommission(std::int64_t price) {
+  return price > 10000000 ? 5 : 0;
+}
diff --git a/compile.json b/compile.json
index f31c94d..c3bf9fd 100644
--- a/compile.json
+++ b/compile.json
@@ -535,6 +535,7 @@
   "Source/UI/Party/UIRegisterPartyWnd.cpp": 2,
   "Source/UI/Party/UIRequestJoinPartyMgr.cpp": 2,
   "Source/UI/Party/UIRequestJoinPartyWnd.cpp": 2,
+  "Source/UI/PriceCommission.cpp": 2,
   "Source/UI/Shop/ItemDrawing.cpp": 2,
   "Source/UI/Shop/MerchantShopRefresh.cpp": 2,
   "Source/UI/Shop/PriceColor.cpp": 2,