In Excel: select a clean data range, choose Insert ▸ PivotTable, place fields into Rows, Columns, Values and Filters, then refresh when the source data changes.
On this page7
Start from a rectangular source table with clear headers.
Select the data and choose Insert ▸ PivotTable.
Drag category fields to Rows or Columns and numeric fields to Values.
Set Value Field Settings, number format, filters and refresh behavior before using the result.
What this does
A pivot table summarizes a flat data table without writing formulas. Rows and Columns define the groups, Values define the numbers to aggregate, and Filters or slicers narrow the view. It works best when the source has one header row, no blank columns, one record per row and consistent data types. Before you run it on a workbook other people depend on, try it on a copy or a few rows first. Undo only reaches back through the current session, so a quick trial run is the cheapest way to see exactly what will change before the file is saved and shared. Treat “excel pivot table group by month” as a small repeatable workflow rather than a one-off click you hope to remember next time. Use a small test block before the live file, so any surprise in the affected pivot table shows up while it is still harmless. When this is a ribbon command, the selection matters more than the button: confirm the range, apply the command, then spot-check the output before saving. That turns a data step that keeps your analysis trustworthy into a method you can reuse, explain, and defend when the workbook leaves your screen.
A worked example
A sales table has Date, Region, Rep and Revenue columns. Insert a PivotTable, drag Region to Rows and Revenue to Values. Excel returns total revenue by region. Drag Date to Columns and group by Month to turn the same source into a monthly regional summary. Pivot tables are one of the highest-leverage Excel tools for summarizing messy transactional data into totals by customer, region, month, product or owner. If this is something you do often, add the command to the Quick Access Toolbar (right-click it on the ribbon and choose Add to Quick Access Toolbar) or learn its shortcut, so next time it is one click instead of a hunt through the menus.
In Google Sheets
This is a command rather than a formula, so there is no syntax to carry over. Google Sheets arranges its commands in menus across the top instead of a ribbon, names some of them differently and does not have every Excel command — look for the equivalent in the Sheets menus or its help before assuming the steps match. Nothing on this page is behind a login or a download: the exact answer is at the top, and the detail below it is there for when you need it. That is the whole promise here — the answer first, and just enough context to make it stick. If you take one thing from this page on “excel pivot table group by month”, make it the order of checks rather than the individual clicks: confirm what is selected, apply the step, and look at the result before moving on. That small routine is what keeps Excel work predictable when the same task comes back in a slightly different workbook.
Common mistakes
- Using a report layout with merged cells or subtotals as the source.
- Forgetting to refresh after source data changes.
- Letting Excel count a numeric field because one source cell contains text.
- Building formulas beside a pivot table without allowing for the pivot size to change.
Frequently asked questions
What is a pivot table?
It is an interactive summary table that groups and aggregates records from a source table.
Why is my pivot table counting instead of summing?
At least one value in the source field is text or blank in a way that makes Excel treat the field as non-numeric.
How do I update a pivot table?
Right-click the pivot table and choose Refresh, or use Data ▸ Refresh All.
Other ways people ask this
On the way here you may have searched this as “excel group pivot table by month”, “excel pivot table group by date” and “excel pivot table group dates by month and year” — it is all the same task, and this page is the single, complete answer to it.
Why do people search for this in so many different ways?
Because the same task has many names. “excel group pivot table by month”, “excel pivot table group by date”, “excel pivot table group dates by month and year” all point at the one operation explained on this page, which is why they all lead here.