diff --git a/kate/katemainwindow.h b/kate/katemainwindow.h
--- a/kate/katemainwindow.h
+++ b/kate/katemainwindow.h
@@ -584,6 +584,7 @@
 protected:
     bool event(QEvent *e) override;
     void mousePressEvent(QMouseEvent *e) override;
+    void closeEvent(QCloseEvent *e) override;
 };
 
 #endif
diff --git a/kate/katemainwindow.cpp b/kate/katemainwindow.cpp
--- a/kate/katemainwindow.cpp
+++ b/kate/katemainwindow.cpp
@@ -1191,6 +1191,43 @@
     }
 }
 
+void KateMainWindow::closeEvent(QCloseEvent *e)
+{
+    // Find out if Kate is closed directly by the user or
+    // by the session manager because the session is closed
+    const bool closedByUser = !qApp->isSavingSession();
+    const bool documentCount = KateApp::self()->documentManager()->documentList().count() > 1;
+    const bool windowCount = KateApp::self()->mainWindowsCount() == 1;
+    const bool askConfirmation = closedByUser && documentCount && windowCount;
+
+    if (askConfirmation) {
+        KGuiItem yes(i18nc("@action:button 'Quit Kate' button", "&Quit %1", QGuiApplication::applicationDisplayName()),
+                     QIcon::fromTheme(QStringLiteral("application-exit")));
+        KGuiItem no(i18n("C&lose Current Tab"), QIcon::fromTheme(QStringLiteral("tab-close")));
+
+        const auto result = KMessageBox::warningYesNoCancel(window(),
+                                                            i18n("You have multiple tabs open in this window, are you sure you want to quit?"),
+                                                            i18n("Confirm Closing"),
+                                                            yes,
+                                                            no,
+                                                            KStandardGuiItem::cancel(),
+                                                            i18n("Do not ask again"));
+
+        auto view = viewManager()->activeView();
+        switch (result) {
+            case KMessageBox::Yes:
+                break;
+            case KMessageBox::No:
+                KateApp::self()->documentManager()->closeDocument(view->document());
+                Q_FALLTHROUGH();
+            default:
+                e->ignore();
+                return;
+        }
+    }
+    KXmlGuiWindow::closeEvent(e);
+}
+
 void KateMainWindow::slotFocusPrevTab()
 {
     if (m_viewManager->activeViewSpace()) {