Copilot in Excel requires Microsoft 365 and a recent version of the process

Copilot is built into Excel if you have a Microsoft 365 subscription (the paid monthly or annual plan, not the free web version). You do not read or install it separately. The feature appears as a button on the ribbon — the toolbar at the top of your spreadsheet — once your version of Excel is current enough to support it.

Copilot works by reading the data in your spreadsheet and generating formulas, summaries, or analysis based on what you ask it to do. It runs on Microsoft's servers, not on your computer, so it does not slow down your machine the way a heavy local program would. Your spreadsheet data is sent to Microsoft when you use it, which matters if you work with sensitive information.

The feature rolled out gradually to Microsoft 365 subscribers starting in late 2023, so not every subscription holder has it yet. If you do not see the Copilot button, your version of Excel is either too old or your subscription has not been updated to include it.

Key Takeaways

  • Copilot appears as a button on the Excel ribbon only if you have a current Microsoft 365 subscription and a recent version of the process.
  • You can ask Copilot to write formulas, explain data patterns, create pivot tables, or summarize columns without typing the code yourself.
  • Copilot sends your spreadsheet data to Microsoft's servers, so do not use it with confidential or regulated information unless your organization has approved it.
  • If the Copilot button does not appear, update Excel through the Microsoft Store or by running Windows Update, or check that your subscription is active.

Check that your Excel version is current enough

Copilot requires Excel version 2404 or later on Windows, or version 16.84 or later on Mac. To find your version, open Excel, click File in the top left, then click Account. Look for "About Excel" or "Excel Updates" — the version number appears there. If you see a version number lower than those listed above, you need to update.

On Windows, click Update Options and then Update Now to read the latest version. On Mac, go to Help and click Check for Updates. Close Excel completely while the update runs, then reopen it. The update usually takes a few minutes.

If you use Excel through the web (Excel Online), Copilot may not be available yet in your region. The web version is rolling out more slowly than the desktop process. If you need Copilot, read the desktop version of Excel from the Microsoft Store instead.

Open the Copilot pane and ask it a question

Once your Excel is up to date, open any spreadsheet. Look at the ribbon — the toolbar with buttons like "Home," "Insert," and "Data" — and find the Copilot button. It usually appears on the right side of the ribbon, sometimes under a menu labeled "Copilot" or as a standalone icon that looks like a chat bubble. Click it to open the Copilot pane on the right side of your screen.

The pane shows a text box where you can type what you want Copilot to do. Be specific about what you need. Instead of "analyze this data," try "show me which product had the highest sales in each month" or "create a formula that counts how many cells in column B are greater than 100." The more detail you give, the better Copilot understands what you want.

Type your request and press Enter or click the send button. Copilot reads your spreadsheet and generates a response — usually a formula, a chart suggestion, or an explanation of what it found. If the result is a formula, Copilot inserts it into your spreadsheet. If it is an analysis, it displays the answer in the pane.

Common tasks Copilot can handle

Copilot can write formulas without you typing them. If you have a column of numbers and want to sum only the values above a certain amount, you can ask "create a formula that adds all values in column C that are greater than 500" and Copilot writes the SUMIF formula for you. You can also ask it to explain a formula that already exists in your spreadsheet — paste the formula into the chat and ask what it does.

You can ask Copilot to create or modify pivot tables. Tell it "make a pivot table that shows total revenue by region and product" and it builds the structure for you, pulling data from the columns you have. You can also ask it to spot patterns: "which rows have the highest values in column D" or "are there any duplicate entries in this list."

Copilot can summarize data in plain language. If you have a large spreadsheet with many columns, ask "what does this data show" or "summarize the trends in this sales data" and Copilot describes what it sees. You can also ask it to help you format or clean data — for example, "split the names in column A into first and last names in separate columns."

What Copilot cannot do and when to use it carefully

Copilot cannot access data outside your current spreadsheet. If you want it to combine information from two different files, you have to copy the data into one spreadsheet first. It also cannot perform actions that require clicking buttons or navigating menus — it can only read your data and suggest formulas or analysis.

Do not use Copilot with spreadsheets that contain personal information, financial records, medical data, or anything your organization classifies as confidential. Copilot sends your data to Microsoft's servers to process it, and even though Microsoft says it does not use the data to train its models, the data leaves your computer. If your workplace has rules about where data can go, check with your IT department or manager before using Copilot on sensitive files.

Copilot sometimes generates formulas that look correct but produce wrong results if your data is structured differently than it expects. Always check the formula Copilot creates by looking at a few cells to make sure it is doing what you asked. If a formula seems off, delete it and ask Copilot to try again with more specific instructions about how your data is organized.

Troubleshooting when Copilot does not appear

If you do not see the Copilot button after updating Excel, your Microsoft 365 subscription may not have been activated for Copilot yet. Microsoft rolled out the feature gradually, so some accounts got it before others. Wait a few days and check again — it may appear without you doing anything.

If you have waited and still do not see it, sign out of Excel completely and sign back in. Click File, then Sign Out, close Excel, reopen it, and sign in again with your Microsoft account. Sometimes this refreshes your subscription status and makes Copilot available.

If Copilot still does not appear, your subscription may have lapsed or you may not have the right type of Microsoft 365 plan. Copilot is included in most Microsoft 365 subscriptions for personal use (Microsoft 365 Personal or Family) and for work (Microsoft 365 Business Standard or higher), but not in older plans or one-time purchases of Office. Check your subscription status by going to File > Account and looking for your subscription name.

How Copilot affects your computer's performance

Because Copilot runs on Microsoft's servers rather than on your computer, it does not consume your processor, memory, or storage the way a local program would. Opening the Copilot pane uses a small amount of RAM to display the chat window, but nothing significant. The main performance factor is your internet connection — if your connection is slow, Copilot takes longer to respond.

Using Copilot does not make Excel run slower or cause your spreadsheet to lag. The only time you might notice a delay is when you first ask Copilot a question and it is processing your request on Microsoft's servers, which usually takes a few seconds. Once Copilot returns a result, your spreadsheet operates normally.

Frequently Asked Questions

Does Copilot cost extra if I already have Microsoft 365?

No. Copilot is included in most Microsoft 365 subscriptions at no additional cost. You do not pay per question or per use. If you have an active Microsoft 365 subscription and your Excel is current, you have access to Copilot.

Can I use Copilot if I only have the free version of Excel Online?

Not yet. Copilot requires a paid Microsoft 365 subscription. The free web version of Excel does not include it. You can read the desktop version of Excel through a Microsoft 365 subscription to use Copilot on your computer.

What happens to my spreadsheet data when I use Copilot?

Your data is sent to Microsoft's servers to process your request. Microsoft states it does not use this data to train its AI models, but the data does leave your computer temporarily. If your spreadsheet contains confidential information, check with your organization before using Copilot.

Can Copilot write VBA macros or complex code?

Copilot can suggest formulas and help with data analysis, but it is not designed to write VBA macros or complex programming code. For advanced automation, you may need to use the Visual Basic editor or consult other resources.

What if Copilot gives me a formula that does not work?

Check that your data is structured the way you described to Copilot. If column references or data types are different than expected, the formula may not work. Delete it and ask Copilot again with more specific details about your data layout, or manually edit the formula to match your spreadsheet.