diff --git a/src/web/app.py b/src/web/app.py
index 57b1cc9..4f2d4f9 100644
--- a/src/web/app.py
+++ b/src/web/app.py
@@ -17,6 +17,8 @@ from src.database import connect
 from src.database import get_visual_communication
 from src.database import ModelOutputs
 from src.database import NoDocumentFoundException
+from src.database import total_annotated
+from src.database import total_documents
 from src.database import upsert_annotations
 from src.database import upsert_visual_communication
 from src.database import VisualCommunication
@@ -66,6 +68,27 @@ def show_success(
     return True, msg
 
 
+@app.callback(
+    Output('progress-bar', 'value'),
+    Output('progress-bar', 'max'),
+    Output('progress-bar', 'label'),
+    Input('next-button', 'n_clicks'),
+    Input('upload-data', 'filename'),
+)
+def update_progress_bar(
+    n_clicks: int,
+    filename_list: list[str] | None,
+):
+    logging.info('began updating progress bar')
+    global collection
+    # get values from database
+    num_total = total_documents(collection=collection)
+    num_handled = total_annotated(collection=collection)
+    limit = int(num_total/20)
+    label_str = f"{num_handled}/{num_total}" if num_handled >= limit else ''
+    return num_handled, num_total, label_str
+
+
 @app.callback(
     Output('success-message', 'data', allow_duplicate=True),
     Output('alert-message', 'data', allow_duplicate=True),