diff --git a/public/css/style.css b/public/css/style.css
index 0c259a4..1654370 100644
--- a/public/css/style.css
+++ b/public/css/style.css
@@ -1301,3 +1301,45 @@ body:not(.admin-body) > * {
   background: #fee2e2;
   border-color: var(--error);
 }
+
+/* ---- Rechnungshistorie in Mitglied-Detail ---- */
+.karte-header-sub {
+  margin-left: auto;
+  font-size: 0.78rem;
+  font-weight: 600;
+  color: var(--text-muted);
+  background: var(--bg);
+  padding: 2px 10px;
+  border-radius: 20px;
+  border: 1px solid var(--border);
+}
+.invoice-history-wrap {
+  max-height: 272px; /* ca. 6 Zeilen */
+  overflow-y: auto;
+  border-radius: 0 0 14px 14px;
+}
+.invoice-history-table {
+  width: 100%;
+  border-collapse: collapse;
+  font-size: 0.88rem;
+}
+.invoice-history-table thead th {
+  position: sticky;
+  top: 0;
+  z-index: 1;
+  padding: 10px 16px;
+  background: var(--bg);
+  font-size: 0.75rem;
+  font-weight: 700;
+  text-transform: uppercase;
+  letter-spacing: 0.5px;
+  color: var(--text-muted);
+  border-bottom: 1.5px solid var(--border);
+}
+.invoice-history-table td {
+  padding: 10px 16px;
+  border-bottom: 1px solid var(--border);
+  vertical-align: middle;
+}
+.invoice-history-row:last-child td { border-bottom: none; }
+.invoice-history-row:hover td { background: #f8f8ff; cursor: default; }
diff --git a/routes/admin.js b/routes/admin.js
index 810e7ba..a988f93 100644
--- a/routes/admin.js
+++ b/routes/admin.js
@@ -175,6 +175,11 @@ router.get('/members/:id', requireAdmin, async (req, res) => {
       'SELECT * FROM membership_pauses WHERE membership_id = ? ORDER BY pause_start DESC',
       [req.params.id]
     );
+    const [invoices] = await db.query(`
+      SELECT * FROM invoices
+      WHERE membership_id = ?
+      ORDER BY period DESC, created_at DESC
+    `, [req.params.id]);
     const [tariffs] = await db.query(
       'SELECT * FROM tariffs WHERE active = 1 ORDER BY name ASC'
     );
@@ -183,6 +188,7 @@ router.get('/members/:id', requireAdmin, async (req, res) => {
       member: rows[0],
       pauses,
       tariffs,
+      invoices,
       admin: req.session.adminUser,
       success: req.query.success || null,
       error: req.query.error || null
diff --git a/views/admin/member-detail.ejs b/views/admin/member-detail.ejs
index dfadb47..4aa5379 100644
--- a/views/admin/member-detail.ejs
+++ b/views/admin/member-detail.ejs
@@ -303,6 +303,68 @@
           </div>
         </div>
 
+
+        <!-- ===== KARTE 5: Rechnungshistorie ===== -->
+        <div class="karte karte-full">
+          <div class="karte-header">
+            <span class="karte-icon">🧾</span>
+            <h3>Rechnungshistorie</h3>
+            <span class="karte-header-sub"><%= invoices.length %> Rechnung(en)</span>
+          </div>
+          <div class="karte-body" style="padding:0">
+            <% if (invoices.length === 0) { %>
+              <p class="karte-empty" style="padding:20px">Noch keine Rechnungen vorhanden.</p>
+            <% } else { %>
+              <div class="invoice-history-wrap">
+                <table class="invoice-history-table">
+                  <thead>
+                    <tr>
+                      <th>Nr.</th>
+                      <th>Periode</th>
+                      <th>Betrag</th>
+                      <th>Status</th>
+                      <th>Datum</th>
+                      <th>Aktion</th>
+                    </tr>
+                  </thead>
+                  <tbody>
+                    <% invoices.forEach(inv => { %>
+                      <tr class="invoice-history-row">
+                        <td class="invoice-nr">PF24-<%= String(inv.id).padStart(6,'0') %></td>
+                        <td><strong><%= inv.period %></strong></td>
+                        <td>
+                          <% if (inv.status === 'cancelled') { %>
+                            <span style="text-decoration:line-through;color:var(--text-muted)">
+                              <%= Number(inv.amount).toFixed(2).replace('.', ',') %> €
+                            </span>
+                          <% } else { %>
+                            <strong><%= Number(inv.amount).toFixed(2).replace('.', ',') %> €</strong>
+                          <% } %>
+                        </td>
+                        <td>
+                          <span class="invoice-status <%= inv.status === 'paid' ? 'paid' : inv.status === 'cancelled' ? 'cancelled' : 'open' %>">
+                            <%= inv.status === 'paid' ? '✅ Bezahlt' : inv.status === 'cancelled' ? '🚫 Storniert' : '🔴 Offen' %>
+                          </span>
+                        </td>
+                        <td><small class="text-muted"><%= new Date(inv.created_at).toLocaleDateString('de-DE') %></small></td>
+                        <td>
+                          <% if (inv.status === 'cancelled') { %>
+                            <a href="/admin/billing/export/storno-pdf/<%= inv.id %>"
+                               class="btn btn-sm btn-storno" target="_blank">🚫 Storno-PDF</a>
+                          <% } else { %>
+                            <a href="/admin/billing/export/pdf/<%= inv.id %>"
+                               class="btn btn-sm btn-outline" target="_blank">📄 Rechnung</a>
+                          <% } %>
+                        </td>
+                      </tr>
+                    <% }) %>
+                  </tbody>
+                </table>
+              </div>
+            <% } %>
+          </div>
+        </div>
+
       </div><!-- end karteikarte-grid -->
     </form>