Pivot Table Issues

How to Fix Excel Pivot Chart Losing Monthly Grouping with Blank Rows

Amos Gikunda Sep 28, 2026 869 views

Question details

The user needs to restore monthly date grouping in an Excel PivotChart that stops working when the data source includes blank rows.

How to Fix Excel Pivot Chart Losing Monthly Grouping with Blank Rows

Product: Microsoft Excel
Device & OS: not provided
Scenario: Creating or updating an Excel PivotChart grouped by months with a named source range that contains blank rows to accommodate future data entry.
Observed behavior: The PivotChart loses its monthly grouping logic and displays individual daily dates and single payment records instead.

Before you start

Verify that the date column in your source data contains properly formatted date serial numbers and not text strings, as text values will also prevent PivotTables from grouping dates.

Solution 1Recommended

Convert Source Data to a Dynamic Excel Table

Using an Excel Table automatically expands the data range as you add new entries, eliminating the need to include blank rows in your source data.

The most robust way to prevent grouping issues is to feed your PivotChart with an official Excel Table rather than a static named range containing empty cells.

Remove existing blank rows

Highlight and delete any empty rows at the bottom of your current dataset to ensure only valid records remain.

Format as a Table

Select any cell inside your dataset, navigate to the Insert tab, and click Table (or press Ctrl+T). Ensure 'My table has headers' is checked and click OK.

Update Pivot Table source

Click anywhere on your PivotChart or PivotTable, go to the PivotTable Analyze tab, select Change Data Source, and input the new Table name (e.g., Table1).

Convert Source Data to a Dynamic Excel Table

Automatic Expansion: Once configured, any new rows typed directly below the table will automatically be included in the PivotChart when you hit Refresh, keeping your monthly groupings intact.

Solution 2

Implement a Dummy Record Workaround

If you must use a standard named range, keep a dummy record at the end to avoid blank rows while allowing easy data insertion.

Solution 3

Revert to an Earlier Office Version

If this grouping issue began immediately after a recent Microsoft Office update, rolling back the version and disabling updates temporarily can resolve the bug.

Free Microsoft Office alternative

Try WPS Office for a Stable Data Analysis Experience

If recurring Microsoft Excel update bugs disrupt your reporting workflow, consider switching to WPS Office. It provides robust data analysis tools, including reliable PivotTables and PivotCharts, completely free of charge.

1. Download and Install: Visit the official WPS Office website and download the free installation package for your operating system.
2. Open Your Spreadsheet: Launch WPS Spreadsheet and open your existing .xlsx file containing the troublesome PivotChart.
3. Analyze Data Smoothly: Group, filter, and refresh your PivotCharts without worrying about unexpected grouping errors caused by buggy updates.

Highly compatible with Microsoft Excel (.xlsx, .xls) and CSV formats.Stable and reliable PivotTable and PivotChart date grouping features.Lightweight installation and seamless migration without steep learning curves.Completely free to use with a familiar, easy-to-navigate interface.

microsoft office alternative - wps office

Frequently Asked Questions

Why does my Excel Pivot Table say 'Cannot group that selection'?

This typically happens if the field contains blank cells, text values, or improperly formatted dates instead of valid date serial numbers. The entire column must consist of consistent, correct data types for grouping to function.

How do I automatically update a Pivot Table when data is added?

Convert your source data range into an official Table (Ctrl+T) before creating the PivotTable. When you add new rows to the bottom, the Table expands automatically. You then only need to click 'Refresh' on the PivotTable Analyze tab.

Will checking 'Show items with no data on rows' fix my grouping issue?

No, this option only forces the PivotTable to display blank or zero-value items that are already part of a valid group. It will not restore date grouping capabilities if blank rows in the source data have broken the core grouping logic.

Excel & Data Problems