diff --git a/demo-postupleniya.xlsx b/demo-postupleniya.xlsx
new file mode 100644
index 0000000..c19e801
Binary files /dev/null and b/demo-postupleniya.xlsx differ
diff --git a/index.html b/index.html
index 3d0e6eb..637e001 100644
--- a/index.html
+++ b/index.html
@@ -98,6 +98,12 @@
         <div class="kt-ai-files" id="fileList"></div>
       </div>
 
+      <div class="kt-ai-actions" id="demoBar" style="margin-top:var(--kt-ai-space-4)">
+        <button class="kt-ai-btn" data-variant="ghost" onclick="loadDemo()">Показать пример данных</button>
+        <button class="kt-ai-btn" data-variant="ghost" style="display:none" id="demoClear" onclick="clearDemo()">Очистить пример</button>
+        <span style="color:var(--kt-ai-fg-muted);font-size:var(--kt-ai-text-sm)">или загрузите свои файлы .xlsx</span>
+      </div>
+
       <div id="results"></div>
 
     </div>
@@ -109,6 +115,41 @@ var YEAR_COLORS = ["8B95A5", "3E9BBF", "00B8CC"];
 var COUNTERPARTY_COLORS = ["00B8CC", "F4B942", "7C6FE8", "4CC38A", "F472A0", "5B8DEF", "D96C4F", "8A8A92"];
 var files = [];
 var rows = [];
+var demoOn = false;
+
+var DEMO = [
+  { year: 2023, name: "KT Bank", amount: 12500000 },
+  { year: 2023, name: "Halyk Pay", amount: 8400000 },
+  { year: 2023, name: "Kaspi Online", amount: 15200000 },
+  { year: 2023, name: "Beeline Payments", amount: 3600000 },
+  { year: 2023, name: "Qysqali", amount: 2100000 },
+  { year: 2024, name: "KT Bank", amount: 14800000 },
+  { year: 2024, name: "Halyk Pay", amount: 9900000 },
+  { year: 2024, name: "Kaspi Online", amount: 18700000 },
+  { year: 2024, name: "Beeline Payments", amount: 4100000 },
+  { year: 2024, name: "Qysqali", amount: 2450000 },
+  { year: 2025, name: "KT Bank", amount: 17300000 },
+  { year: 2025, name: "Halyk Pay", amount: 11200000 },
+  { year: 2025, name: "Kaspi Online", amount: 22400000 },
+  { year: 2025, name: "Beeline Payments", amount: 3800000 },
+  { year: 2025, name: "Qysqali", amount: 2900000 },
+  { year: 2025, name: "Paytech Almaty", amount: 1500000 }
+];
+
+function loadDemo() {
+  if (demoOn) return;
+  demoOn = true;
+  rows = rows.concat(DEMO);
+  render();
+}
+
+function clearDemo() {
+  demoOn = false;
+  rows = rows.filter(function (r) {
+    return !DEMO.some(function (d) { return d.year === r.year && d.name === r.name && d.amount === r.amount; });
+  });
+  render();
+}
 
 var fmt = new Intl.NumberFormat("ru-RU", { maximumFractionDigits: 0 });
 
@@ -197,7 +238,7 @@ function rebuildRows() {
 }
 
 function resetData() {
-  files = []; rows = [];
+  files = []; rows = []; demoOn = false;
   renderFileList(); render();
 }
 
@@ -349,8 +390,10 @@ function render() {
     '</div>' +
     '<div class="kt-ai-actions">' +
       '<button class="kt-ai-btn" data-variant="ghost" onclick="window.print()">Печать / экспортировать в PDF</button>' +
-      '<span style="color:var(--kt-ai-fg-muted);font-size:var(--kt-ai-text-sm)">Итого контрагентов: ' + names.length + ' · записей: ' + rows.length + '</span>' +
+      '        '<span style="color:var(--kt-ai-fg-muted);font-size:var(--kt-ai-text-sm)">Итого контрагентов: ' + names.length + ' · записей: ' + rows.length +
+          (demoOn ? " · пример данных" : "") + '</span>' +
     '</div>';
+    document.getElementById("demoClear").style.display = demoOn ? "" : "none";
 }
 
 document.getElementById("drop").addEventListener("dragover", function (e) { e.preventDefault(); this.classList.add("over"); });