AI in Excel: Your AI Spreadsheet Analyst

Excel has always been the workhorse of small business operations. Budgets, customer lists, inventory counts, pricing models — if your business runs on spreadsheets, you're not alone.

What's changed recently is that Excel now has an AI analyst built in. Microsoft Copilot in Excel can read your data, explain what's happening in a cell, and do the kind of first-pass analysis that used to require a spare hour and a headache.

Other spreadsheet tools are adding similar AI features — Google Sheets has its own AI assistant, and smaller apps are experimenting too. But since Coulee Tech works primarily with Microsoft 365 clients, this post focuses on Copilot in Excel specifically. If your business is on M365, this is likely already available to you or close to it.

What Copilot in Excel Actually Does

Copilot shows up as a side panel in Excel. You select a range of cells, or just ask a question, and it responds in plain English — often with a formula, a chart, or a cleaned-up version of your data as the result.

It's not magic, and it's not always right on the first try. Think of it as a capable junior analyst: fast, helpful, and worth double-checking before you send a number to your accountant. But for the everyday spreadsheet friction that eats up a business owner's afternoon, it's a genuine time-saver.

Here are four practical ways to use it, with prompts you can adapt.

Use Case 1: Fixing and Explaining Broken Formulas

Everyone has a spreadsheet with a cell showing #REF! or #VALUE! and no idea why. Instead of hunting through nested formulas, select the cell and ask Copilot directly.

Example prompt:

"Why is this formula returning an error, and how do I fix it?"

Copilot will look at the formula, identify the likely cause (a deleted reference, a mismatched data type, a missing argument), and suggest a corrected version. You can also ask it to explain a formula someone else built, which is useful when you inherit a spreadsheet from a former employee or a departing bookkeeper.

Example prompt:

"Explain what this formula is calculating, step by step."

Use Case 2: Running What-If Scenarios

This is where Copilot earns its keep for owners and managers. Instead of manually rebuilding a model to test a scenario, you can just ask.

Example prompt:

"What would our margin be if costs went up 8% and we kept prices the same?"

Example prompt:

"If we raise prices 5% but lose 10% of unit volume, what happens to total revenue?"

Copilot can build a temporary calculation, walk through the logic, and often suggest a small table so you can see a few scenarios side by side. This is especially useful during budgeting season or when a vendor announces a price increase and you need an answer before your next meeting, not next week.

Use Case 3: Cleaning Messy Data

Data cleanup is the least enjoyable part of spreadsheet work, and it's exactly the kind of repetitive task Copilot handles well.

Example prompt:

"Standardize these inconsistent date formats to MM/DD/YYYY."

Example prompt:

"Remove duplicate rows based on customer email, keeping the most recent entry."

This matters more than it sounds like. A customer list with three formats for the same date, or five near-duplicate entries for the same client under slightly different email spellings, causes real problems downstream — failed mail merges, inaccurate counts, missed follow-ups. Letting Copilot do a first pass, then reviewing its changes, is faster and more reliable than doing it by hand.

Use Case 4: Quick Summaries and Charts in Plain English

You don't need to remember pivot table steps or chart wizard menus anymore. You can just describe what you want.

Example prompt:

"Summarize this sales data by region and show me which region grew the most this quarter."

Example prompt:

"Create a chart showing monthly revenue trend for the last 12 months."

Copilot will generate the summary or chart and explain what it built. If it's not quite right, you can refine it conversationally — "break that down by product line instead" — rather than starting over.

A Few Practical Notes

Copilot in Excel needs an eligible Microsoft 365 subscription, and availability has been rolling out gradually by plan type. If you're not sure whether your organization has access, that's a quick thing to check with your IT provider.

Also worth remembering: Copilot works from the data you give it. It won't catch an error in your source numbers, and it can occasionally misread an ambiguous request. Treat its output as a strong first draft, especially for anything going into a financial report or a client-facing document.

From Spreadsheet Comfort to AI Maturity

Learning to ask Excel a plain-English question instead of googling a formula is a small habit, but it's a meaningful one. It's often the first hands-on experience employees have with AI actually doing useful work, rather than just answering trivia.

That comfort matters beyond Excel. Two of the dimensions we look at in an AI maturity evaluation are Talent — how comfortable your team actually is experimenting with AI tools — and Technology — whether the tools you've licensed are configured and actually being used. A team that's already asking Copilot to explain a formula is further along on both than they might realize.

If you're curious where your organization stands, our AI Business Maturity Assessment walks through this in more detail. And if you want help getting Copilot properly set up and adopted across your team, contact us — we're happy to talk through it.