diff --git a/public/css/style.css b/public/css/style.css
index 29bc200..0c259a4 100644
--- a/public/css/style.css
+++ b/public/css/style.css
@@ -1289,3 +1289,15 @@ body:not(.admin-body) > * {
   height: 1px;
   background: var(--border);
 }
+
+/* Storno Button */
+.btn-storno {
+  background: #fff0f0;
+  color: var(--error);
+  border: 1.5px solid #fecaca;
+  font-weight: 700;
+}
+.btn-storno:hover {
+  background: #fee2e2;
+  border-color: var(--error);
+}
diff --git a/routes/billing.js b/routes/billing.js
index f81ee8b..d750625 100644
--- a/routes/billing.js
+++ b/routes/billing.js
@@ -347,15 +347,111 @@ router.get('/export/pdf/:invoiceId', requireAdmin, async (req, res) => {
 router.post('/invoices/:id/cancel', requireAdmin, async (req, res) => {
   const period = req.body.period || currentPeriod();
   try {
-    await db.query(
-      "UPDATE invoices SET status='cancelled' WHERE id=?",
-      [req.params.id]
-    );
+    await db.query("UPDATE invoices SET status='cancelled' WHERE id=?", [req.params.id]);
     res.redirect(`/admin/billing?period=${period}&success=Rechnung+storniert`);
   } catch (err) {
     res.redirect(`/admin/billing?period=${period}&error=Fehler+beim+Stornieren`);
   }
 });
 
+// GET – Storno-PDF herunterladen
+router.get('/export/storno-pdf/:invoiceId', requireAdmin, async (req, res) => {
+  try {
+    const [rows] = await db.query(`
+      SELECT i.*,
+             m.first_name, m.last_name, m.email, m.street, m.zip, m.city,
+             t.name as tariff_name
+      FROM invoices i
+      JOIN memberships m ON i.membership_id = m.id
+      LEFT JOIN tariffs t ON m.tariff_id = t.id
+      WHERE i.id = ?
+    `, [req.params.invoiceId]);
+    if (rows.length === 0) return res.status(404).send('Rechnung nicht gefunden');
+    const inv = rows[0];
+
+    const PDFDocument = require('pdfkit');
+    res.setHeader('Content-Type', 'application/pdf');
+    res.setHeader('Content-Disposition', `attachment; filename="Storno_PF24-${String(inv.id).padStart(6,'0')}_${inv.period}.pdf"`);
+
+    const doc = new PDFDocument({ margin: 60, size: 'A4' });
+    doc.pipe(res);
+
+    // Absender
+    doc.fontSize(10).fillColor('#666')
+       .text('PlusFit24 UG · Moosleiten 12 · 84089 Aiglsbach', 60, 60);
+
+    // Empfänger
+    doc.fontSize(11).fillColor('#000')
+       .text(`${inv.first_name} ${inv.last_name}`, 60, 110)
+       .text(inv.street || '')
+       .text(`${inv.zip} ${inv.city}`);
+
+    // Roter STORNO Stempel
+    doc.fontSize(28).fillColor('#dc2626')
+       .text('STORNORECHNUNG', 60, 215);
+
+    doc.fontSize(10).fillColor('#333')
+       .text(`Storno-Nr.: STORNO-PF24-${String(inv.id).padStart(6,'0')}`, 60, 258)
+       .text(`Datum: ${new Date().toLocaleDateString('de-DE')}`)
+       .text(`Bezieht sich auf Rechnung: PF24-${String(inv.id).padStart(6,'0')} vom ${new Date(inv.created_at).toLocaleDateString('de-DE')}`)
+       .text(`Zeitraum: ${periodLabel(inv.period)}`);
+
+    doc.moveTo(60, 318).lineTo(535, 318).strokeColor('#ddd').stroke();
+
+    doc.fontSize(10).fillColor('#999')
+       .text('Beschreibung', 60, 330)
+       .text('Betrag', 460, 330, { align: 'right', width: 75 });
+    doc.moveTo(60, 345).lineTo(535, 345).strokeColor('#ddd').stroke();
+
+    doc.fontSize(11).fillColor('#dc2626')
+       .text(`Storno: ${inv.description || `Mitgliedsbeitrag ${periodLabel(inv.period)}`}`, 60, 355)
+       .text(`-${Number(inv.amount).toFixed(2).replace('.', ',')} €`, 460, 355, { align: 'right', width: 75 });
+
+    doc.moveTo(60, 378).lineTo(535, 378).strokeColor('#ddd').stroke();
+
+    doc.fontSize(12).fillColor('#dc2626')
+       .text('Stornobetrag:', 360, 390)
+       .text(`-${Number(inv.amount).toFixed(2).replace('.', ',')} €`, 460, 390, { align: 'right', width: 75 });
+
+    doc.fontSize(9).fillColor('#999')
+       .text('Alle Beträge inkl. MwSt. gem. § 19 UStG (Kleinunternehmerregelung)', 60, 415);
+
+    doc.fontSize(9).fillColor('#999')
+       .text('PlusFit24 UG · Moosleiten 12 · 84089 Aiglsbach · Gläubiger-ID: DE1200100002549495',
+             60, 730, { align: 'center', width: 475 });
+    doc.end();
+  } catch (err) {
+    console.error(err);
+    res.status(500).send('PDF Fehler: ' + err.message);
+  }
+});
+
+// POST – Neue Rechnung aus stornierter erstellen
+router.post('/invoices/:id/reissue', requireAdmin, async (req, res) => {
+  try {
+    const [rows] = await db.query('SELECT * FROM invoices WHERE id = ?', [req.params.id]);
+    if (rows.length === 0) return res.redirect('/admin/billing?error=Rechnung+nicht+gefunden');
+    const orig = rows[0];
+
+    // Neue Rechnung mit gleichen Daten aber neuer ID und Status open
+    const [result] = await db.query(`
+      INSERT INTO invoices (billing_run_id, membership_id, period, amount, description, iban, account_holder, bank_name, status)
+      VALUES (?, ?, ?, ?, ?, ?, ?, ?, 'open')
+    `, [
+      orig.billing_run_id, orig.membership_id,
+      orig.period,
+      orig.amount,
+      orig.description ? orig.description + ' (Neuausstellung)' : 'Neuausstellung',
+      orig.iban, orig.account_holder, orig.bank_name
+    ]);
+
+    const newPeriod = orig.period;
+    res.redirect(`/admin/billing?period=${newPeriod}&success=Neue+Rechnung+PF24-${String(result.insertId).padStart(6,'0')}+erstellt`);
+  } catch (err) {
+    console.error(err);
+    res.redirect('/admin/billing?error=Fehler+bei+Neuausstellung');
+  }
+});
+
 module.exports = router;
 module.exports.currentPeriod = currentPeriod;
diff --git a/views/admin/billing.ejs b/views/admin/billing.ejs
index d69a05b..3cd6ebf 100644
--- a/views/admin/billing.ejs
+++ b/views/admin/billing.ejs
@@ -145,21 +145,35 @@
               </td>
               <td>
                 <div class="invoice-actions">
-                  <a href="/admin/billing/export/pdf/<%= inv.id %>" 
-                     class="btn btn-sm btn-outline" target="_blank" title="PDF herunterladen">
-                    📄 PDF
-                  </a>
+                  <% if (inv.status !== 'cancelled') { %>
+                    <!-- Normale Rechnung PDF -->
+                    <a href="/admin/billing/export/pdf/<%= inv.id %>"
+                       class="btn btn-sm btn-outline" target="_blank">
+                      📄 Rechnung
+                    </a>
+                  <% } else { %>
+                    <!-- Storno PDF -->
+                    <a href="/admin/billing/export/storno-pdf/<%= inv.id %>"
+                       class="btn btn-sm btn-storno" target="_blank">
+                      🚫 Storno-PDF
+                    </a>
+                    <!-- Neue Rechnung ausstellen -->
+                    <form method="POST" action="/admin/billing/invoices/<%= inv.id %>/reissue" style="display:inline"
+                          onsubmit="return confirm('Neue Rechnung für diesen Posten ausstellen?')">
+                      <button type="submit" class="btn btn-sm btn-primary">🔄 Neue Rechnung</button>
+                    </form>
+                  <% } %>
                   <% if (inv.status === 'open') { %>
                     <form method="POST" action="/admin/billing/invoices/<%= inv.id %>/paid" style="display:inline">
                       <input type="hidden" name="period" value="<%= period %>">
-                      <button type="submit" class="btn btn-sm btn-success" title="Als bezahlt markieren">✅</button>
+                      <button type="submit" class="btn btn-sm btn-success">✅ Bezahlt</button>
                     </form>
                   <% } %>
                   <% if (inv.status !== 'cancelled') { %>
                     <form method="POST" action="/admin/billing/invoices/<%= inv.id %>/cancel" style="display:inline"
-                          onsubmit="return confirm('Rechnung PF24-' + String(<%= inv.id %>).padStart(6,'0') + ' wirklich stornieren?')">
+                          onsubmit="return confirm('Rechnung PF24-<%= String(inv.id).padStart(6,'0') %> wirklich stornieren?')">
                       <input type="hidden" name="period" value="<%= period %>">
-                      <button type="submit" class="btn btn-sm btn-danger" title="Stornieren">🚫</button>
+                      <button type="submit" class="btn btn-sm btn-danger">🚫 Stornieren</button>
                     </form>
                   <% } %>
                 </div>