diff --git a/backend/src/tools/statistik/routes.js b/backend/src/tools/statistik/routes.js
index 3fd1220..26f5ab9 100644
--- a/backend/src/tools/statistik/routes.js
+++ b/backend/src/tools/statistik/routes.js
@@ -154,7 +154,10 @@ router.get('/overview', authenticate, (req, res) => {
     const key = getBucketKey(dateStr);
     if (!key) continue;
     if (!buckets[key]) buckets[key] = { month:key, revenue:0, expenses:0, orders:0 };
-    if (o.bezahlt) buckets[key].revenue += getOrderRevenue(o);
+    if (o.bezahlt) {
+      buckets[key].revenue += getOrderRevenue(o);
+      buckets[key].base_cost = (buckets[key].base_cost||0) + getOrderBaseCost(o.id);
+    }
     buckets[key].orders++;
   }
 
@@ -170,14 +173,14 @@ router.get('/overview', authenticate, (req, res) => {
   // Sortiert + ohne Filter auf letzte 12 Monate begrenzen
   let monthlyData = Object.values(buckets)
     .sort((a,b) => a.month.localeCompare(b.month))
-    .map(m => ({ ...m, revenue: round2(m.revenue), expenses: round2(m.expenses) }));
+    .map(m => ({ ...m, revenue: round2(m.revenue), base_cost: round2(m.base_cost||0), expenses: round2(m.expenses) }));
 
   if (!from && !to) monthlyData = monthlyData.slice(-12);
 
   // Kumulierter Nettogewinn (pro Bucket)
   let cum = 0;
   const cumulativeData = monthlyData.map(m => {
-    cum += m.revenue - m.expenses;
+    cum += (m.revenue||0) - (m.base_cost||0) - (m.expenses||0);
     return { month: m.month, value: round2(cum) };
   });
 
@@ -233,6 +236,23 @@ router.get('/month-orders', authenticate, (req, res) => {
   })));
 });
 
+// Debug2: monthlyData mit base_cost prüfen
+router.get('/debug2', authenticate, (req, res) => {
+  const { from, to } = req.query;
+  const u = uid(req);
+  const allOrders = db.prepare('SELECT * FROM orders WHERE user_id=? AND bezahlt=1').all(u);
+  const result = allOrders.map(o => {
+    const rev = getOrderRevenue(o);
+    const cost = getOrderBaseCost(o.id);
+    return { id:o.id, name:o.name, bezahlt_am:o.bezahlt_am, revenue:rev, base_cost:cost, profit: rev-cost };
+  });
+  res.json({ orders: result, totals: {
+    revenue: result.reduce((s,o)=>s+o.revenue,0),
+    base_cost: result.reduce((s,o)=>s+o.base_cost,0),
+    profit: result.reduce((s,o)=>s+o.profit,0),
+  }});
+});
+
 // Debug: rohe Auftragsdaten mit Revenue
 router.get('/debug', authenticate, (req, res) => {
   const u = uid(req);