diff --git a/autotests/ksortfilterproxymodel_qml.cpp b/autotests/ksortfilterproxymodel_qml.cpp
--- a/autotests/ksortfilterproxymodel_qml.cpp
+++ b/autotests/ksortfilterproxymodel_qml.cpp
@@ -61,12 +61,13 @@
                  "import org.kde.kitemmodels 1.0\n"
                  "KSortFilterProxyModel\n"
                  "{\n"
+                 "    property int modulo: 2\n"
                  "    sourceModel: KNumberModel {\n"
                  "        minimumValue: 1\n"
                  "        maximumValue: 10\n"
                  "    }\n"
                  "    filterRowCallback: function(source_row, source_parent) {\n"
-                 "        return sourceModel.data(sourceModel.index(source_row, 0, source_parent), Qt.DisplayRole) % 2 == 1;\n"
+                 "        return sourceModel.data(sourceModel.index(source_row, 0, source_parent), Qt.DisplayRole) % modulo == 1;\n"
                  "    };\n"
                  "}\n");
     QCOMPARE(app.rootObjects().count(), 1);
@@ -80,8 +81,27 @@
     QCOMPARE(filterModel->data(filterModel->index(2, 0)).toString(), "5");
     QCOMPARE(filterModel->data(filterModel->index(3, 0)).toString(), "7");
     QCOMPARE(filterModel->data(filterModel->index(4, 0)).toString(), "9");
-}
 
+    filterModel->setProperty("modulo", 3);
+
+    // Nothing should change until we call invalidateFilter
+    QCOMPARE(filterModel->rowCount(), 5);
+    QCOMPARE(filterModel->data(filterModel->index(0, 0)).toString(), "1");
+    QCOMPARE(filterModel->data(filterModel->index(1, 0)).toString(), "3");
+    QCOMPARE(filterModel->data(filterModel->index(2, 0)).toString(), "5");
+    QCOMPARE(filterModel->data(filterModel->index(3, 0)).toString(), "7");
+    QCOMPARE(filterModel->data(filterModel->index(4, 0)).toString(), "9");
+
+    // Simulate call from QML by going through metaobject rather than calling it directly
+    const bool invalidateFilterCallOk = QMetaObject::invokeMethod(filterModel, "invalidateFilter");
+    QVERIFY(invalidateFilterCallOk);
+
+    QCOMPARE(filterModel->rowCount(), 4);
+    QCOMPARE(filterModel->data(filterModel->index(0, 0)).toString(), "1");
+    QCOMPARE(filterModel->data(filterModel->index(1, 0)).toString(), "4");
+    QCOMPARE(filterModel->data(filterModel->index(2, 0)).toString(), "7");
+    QCOMPARE(filterModel->data(filterModel->index(3, 0)).toString(), "10");
+}
 
 void tst_KSortFilterProxyModelQml::testSortRole_data()
 {
diff --git a/src/qml/ksortfilterproxymodel.h b/src/qml/ksortfilterproxymodel.h
--- a/src/qml/ksortfilterproxymodel.h
+++ b/src/qml/ksortfilterproxymodel.h
@@ -122,6 +122,17 @@
     void classBegin() override;
     void componentComplete() override;
 
+public Q_SLOTS:
+    /**
+     * Invalidates the current filtering.
+     *
+     * This function should be called if you are implementing custom filtering through
+     * filterRowCallback or filterColumnCallback, and your filter parameters have changed.
+     *
+     * @since 5.70
+     */
+    void invalidateFilter();
+
 Q_SIGNALS:
     void filterStringChanged();
     void filterRoleChanged();
diff --git a/src/qml/ksortfilterproxymodel.cpp b/src/qml/ksortfilterproxymodel.cpp
--- a/src/qml/ksortfilterproxymodel.cpp
+++ b/src/qml/ksortfilterproxymodel.cpp
@@ -220,3 +220,8 @@
         setSortRole(m_sortRole);
     }
 }
+
+void KSortFilterProxyModel::invalidateFilter()
+{
+    QSortFilterProxyModel::invalidateFilter();
+}