diff --git a/src/currentCustomerAccountBalance.h b/src/currentCustomerAccountBalance.h
new file mode 100644
index 0000000..76725fe
--- /dev/null
+++ b/src/currentCustomerAccountBalance.h
@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stdlib.h>
+
+#define MAX_LENGTH 100
+float getAvailableAccountBalance(int user_id);
\ No newline at end of file