diff --git a/src/qt/modaloverlay.h b/src/qt/modaloverlay.h
--- a/src/qt/modaloverlay.h
+++ b/src/qt/modaloverlay.h
@@ -46,6 +46,7 @@
     QVector<QPair<qint64, double>> blockProcessTime;
     bool layerIsVisible;
     bool userClosed;
+    void UpdateHeaderSyncLabel();
 };
 
 #endif // BITCOIN_QT_MODALOVERLAY_H
diff --git a/src/qt/modaloverlay.cpp b/src/qt/modaloverlay.cpp
--- a/src/qt/modaloverlay.cpp
+++ b/src/qt/modaloverlay.cpp
@@ -65,6 +65,7 @@
     if (count > bestHeaderHeight) {
         bestHeaderHeight = count;
         bestHeaderDate = blockDate;
+        UpdateHeaderSyncLabel();
     }
 }
 
@@ -143,12 +144,22 @@
         ui->numberOfBlocksLeft->setText(
             QString::number(bestHeaderHeight - count));
     } else {
-        ui->numberOfBlocksLeft->setText(
-            tr("Unknown. Syncing Headers (%1)...").arg(bestHeaderHeight));
+        UpdateHeaderSyncLabel();
         ui->expectedTimeLeft->setText(tr("Unknown..."));
     }
 }
 
+void ModalOverlay::UpdateHeaderSyncLabel() {
+    int est_headers_left = bestHeaderDate.secsTo(QDateTime::currentDateTime()) /
+                           Params().GetConsensus().nPowTargetSpacing;
+    ui->numberOfBlocksLeft->setText(
+        tr("Unknown. Syncing Headers (%1, %2%)...")
+            .arg(bestHeaderHeight)
+            .arg(QString::number(100.0 / (bestHeaderHeight + est_headers_left) *
+                                     bestHeaderHeight,
+                                 'f', 1)));
+}
+
 void ModalOverlay::toggleVisibility() {
     showHide(layerIsVisible, true);
     if (!layerIsVisible) {