diff --git a/categorize_transactions.py b/categorize_transactions.py
index a5567ba..1031eaf 100644
--- a/categorize_transactions.py
+++ b/categorize_transactions.py
@@ -5,7 +5,7 @@ from datetime import datetime
 import json
 import csv
 import sys
-from openpyxl import Workbook
+from openpyxl import Workbook, load_workbook
 
 # --------------------------------------------------
 # Kalenderwoche bestimmen
@@ -49,12 +49,12 @@ source_json = (
 categorized_csv_dir = year_dir / "categorized_csv"
 categorized_json_dir = year_dir / "categorized_json"
 summary_dir = year_dir / "summary"
-excel_dir = year_dir / "excel"
+jahresauswertung_dir = year_dir / "jahresauswertung"
 
 categorized_csv_dir.mkdir(parents=True, exist_ok=True)
 categorized_json_dir.mkdir(parents=True, exist_ok=True)
 summary_dir.mkdir(parents=True, exist_ok=True)
-excel_dir.mkdir(parents=True, exist_ok=True)
+jahresauswertung_dir.mkdir(parents=True, exist_ok=True)
 
 csv_file = (
     categorized_csv_dir
@@ -72,8 +72,8 @@ summary_file = (
 )
 
 excel_file = (
-    excel_dir
-    / f"transactions_{year}_KW{week:02d}.xlsx"
+    jahresauswertung_dir
+    / f"Kontobewegungen_{year}.xlsx"
 )
 
 # --------------------------------------------------
@@ -211,35 +211,51 @@ with open(json_file, "w", encoding="utf-8") as outfile:
     )
 
 # --------------------------------------------------
-# Excel exportieren
+# Jahres-Excel aktualisieren
 # --------------------------------------------------
 
+if excel_file.exists():
+    wb = load_workbook(excel_file)
+else:
+    wb = Workbook()
 
-wb = Workbook()
+    if "Sheet" in wb.sheetnames:
+        wb.remove(wb["Sheet"])
 
-ws1 = wb.active
-ws1.title = "Transaktionen"
+sheet_name = f"KW{week:02d}"
 
-ws1.append([
-    "Datum",
-    "Betrag",
-    "Kategorie",
-    "Name",
-    "Verwendungszweck"
-])
+# Vorhandenes Blatt ersetzen
+if sheet_name in wb.sheetnames:
+    wb.remove(wb[sheet_name])
 
-for t in categorized_transactions:
-    ws1.append([
-        t["date"],
-        t["amount"],
-        t["category"],
-        t["applicant_name"],
-        t["purpose"]
-    ])
+ws = wb.create_sheet(sheet_name)
 
-ws2 = wb.create_sheet("Kategorien")
+# Kennzahlen
 
-ws2.append([
+total_income = sum(
+    values["income"]
+    for values in category_totals.values()
+)
+
+total_expenses = sum(
+    values["expenses"]
+    for values in category_totals.values()
+)
+
+total_saldo = sum(
+    values["saldo"]
+    for values in category_totals.values()
+)
+
+ws.append(["Kennzahl", "Wert"])
+ws.append(["Transaktionen", len(categorized_transactions)])
+ws.append(["Einnahmen", total_income])
+ws.append(["Ausgaben", total_expenses])
+ws.append(["Saldo", total_saldo])
+
+ws.append([])
+
+ws.append([
     "Kategorie",
     "Einnahmen",
     "Ausgaben",
@@ -247,15 +263,48 @@ ws2.append([
 ])
 
 for category, values in sorted(category_totals.items()):
-    ws2.append([
+
+    ws.append([
         category,
         values["income"],
         values["expenses"],
         values["saldo"]
     ])
 
-wb.save(excel_file)
+# --------------------------------------------------
+# Übersicht aktualisieren
+# --------------------------------------------------
 
+if "Übersicht" in wb.sheetnames:
+    wb.remove(wb["Übersicht"])
+
+overview = wb.create_sheet("Übersicht", 0)
+
+overview.append([
+    "KW",
+    "Einnahmen",
+    "Ausgaben",
+    "Saldo"
+])
+
+for sheet in sorted(
+    [s for s in wb.sheetnames if s.startswith("KW")]
+):
+
+    ws_kw = wb[sheet]
+
+    income = ws_kw["B3"].value
+    expenses = ws_kw["B4"].value
+    saldo = ws_kw["B5"].value
+
+    overview.append([
+        sheet,
+        income,
+        expenses,
+        saldo
+    ])
+
+wb.save(excel_file)
 
 # --------------------------------------------------
 # Kategorien-Summen exportieren