diff --git a/Bibliotheksverwaltung/src/DomainLayer/Adult.java b/Bibliotheksverwaltung/src/DomainLayer/Adult.java
new file mode 100644
index 0000000..a0288ff
--- /dev/null
+++ b/Bibliotheksverwaltung/src/DomainLayer/Adult.java
@@ -0,0 +1,9 @@
+package DomainLayer;
+
+public class Adult extends User {
+    private static final double REGULAR_FEE = 50.0; // Jahresgebühr für Erwachsene
+
+    public Adult(String id, String name) {
+        super(id, name, REGULAR_FEE);
+    }
+}
\ No newline at end of file