diff --git a/isometric-park-fna/Messages/SingleExpenseMessage.cs b/isometric-park-fna/Messages/SingleExpenseMessage.cs
new file mode 100644
--- /dev/null
+++ b/isometric-park-fna/Messages/SingleExpenseMessage.cs
@@ -0,0 +1,10 @@
+using Encompass;
+
+namespace isometricparkfna.Messages 
+{
+    public struct SingleExpenseMessage : IMessage 
+    {
+        public string category;
+        public decimal amount;
+    }
+}