diff --git a/src/plugins/geometry_checker/ui/qgsgeometrycheckersetuptab.cpp b/src/plugins/geometry_checker/ui/qgsgeometrycheckersetuptab.cpp
index 6403edb46cf..4d802237dc0 100644
--- a/src/plugins/geometry_checker/ui/qgsgeometrycheckersetuptab.cpp
+++ b/src/plugins/geometry_checker/ui/qgsgeometrycheckersetuptab.cpp
@@ -66,6 +66,8 @@ QgsGeometryCheckerSetupTab::QgsGeometryCheckerSetupTab( QgisInterface *iface, QD
   }
   ui.listWidgetInputLayers->setIconSize( QSize( 16, 16 ) );
 
+  ui.lineEditFilenamePrefix->setText( QSettings().value( "/geometry_checker/previous_values/filename_prefix", tr( "checked_" ) ).toString() );
+
   connect( mRunButton, &QAbstractButton::clicked, this, &QgsGeometryCheckerSetupTab::runChecks );
   connect( ui.listWidgetInputLayers, &QListWidget::itemChanged, this, &QgsGeometryCheckerSetupTab::validateInput );
   connect( QgsProject::instance(), &QgsProject::layersAdded, this, &QgsGeometryCheckerSetupTab::updateLayers );
@@ -294,11 +296,13 @@ void QgsGeometryCheckerSetupTab::runChecks()
     QString outputExtension = metadata.ext;
 
     // List over input layers, check which existing project layers need to be removed and create output layers
+    QString filenamePrefix = ui.lineEditFilenamePrefix->text();
+    QSettings().setValue( "/geometry_checker/previous_values/filename_prefix", filenamePrefix );
     QStringList toRemove;
     QStringList createErrors;
     for ( QgsVectorLayer *layer : layers )
     {
-      QString outputPath = outputDir.absoluteFilePath( layer->name() + "." + outputExtension );
+      QString outputPath = outputDir.absoluteFilePath( filenamePrefix + layer->name() + "." + outputExtension );
 
       // Remove existing layer with same uri from project
       for ( QgsVectorLayer *projectLayer : QgsProject::instance()->layers<QgsVectorLayer *>() )
diff --git a/src/plugins/geometry_checker/ui/qgsgeometrycheckersetuptab.ui b/src/plugins/geometry_checker/ui/qgsgeometrycheckersetuptab.ui
index 87eeb8827bf..4ba0c15cc6b 100644
--- a/src/plugins/geometry_checker/ui/qgsgeometrycheckersetuptab.ui
+++ b/src/plugins/geometry_checker/ui/qgsgeometrycheckersetuptab.ui
@@ -41,9 +41,9 @@
       <property name="geometry">
        <rect>
         <x>0</x>
-        <y>0</y>
+        <y>-215</y>
         <width>626</width>
-        <height>941</height>
+        <height>966</height>
        </rect>
       </property>
       <layout class="QGridLayout" name="gridLayout_4">
@@ -731,6 +731,20 @@
                 <item row="0" column="1" colspan="2">
                  <widget class="QComboBox" name="comboBoxOutputFormat"/>
                 </item>
+                <item row="2" column="0">
+                 <widget class="QLabel" name="labelFilenamePrefix">
+                  <property name="text">
+                   <string>Filename prefix:</string>
+                  </property>
+                 </widget>
+                </item>
+                <item row="2" column="1" colspan="2">
+                 <widget class="QLineEdit" name="lineEditFilenamePrefix">
+                  <property name="text">
+                   <string/>
+                  </property>
+                 </widget>
+                </item>
                </layout>
               </widget>
              </item>