What Is Microsoft Copilot and Should Your Small Business Be Using It?

What Copilot actually is

Microsoft Copilot is an AI assistant built into Microsoft 365 applications. It uses large language models — the same technology behind ChatGPT — but it has access to your Microsoft 365 data: your emails, documents, meetings, and calendar.

That integration is what makes it different from using a standalone AI tool. You can ask Copilot to summarize last week's email thread with a client, draft a response based on your previous messages, pull key points from a document you uploaded, or generate a first draft of a proposal based on notes from a meeting.

What it costs

Copilot for Microsoft 365 costs $30 per user per month on top of your existing Microsoft 365 subscription. That is a significant addition — for a 10-person team it adds $3,600 per year to your Microsoft costs.

Some basic Copilot features are included in certain Microsoft 365 plans at no extra cost, but the full integration across all apps requires the paid add-on. Microsoft has been gradually adjusting what is included at which tier, so it is worth checking your current plan.

What it does well

• Summarizing long email threads — useful when you come back to a conversation after a few days away
• Drafting emails and documents — gives you a starting point faster than a blank page, especially for routine communications
• Meeting summaries in Teams — if you record a Teams meeting, Copilot can produce a summary with action items
• Excel data analysis — you can ask questions about your data in plain English and get charts or summaries without writing formulas
• Searching across your Microsoft 365 data — ask a question and get an answer with citations to the specific emails or documents it pulled from

What the limitations are

Copilot is useful for drafting and summarizing, but it makes mistakes. It can misread tone in emails, produce confident-sounding summaries that miss important nuances, or pull from the wrong document when your filing is inconsistent. Everything it produces needs to be reviewed before you use it.

The quality of the output also depends heavily on the quality of your Microsoft 365 data. If your files are disorganized, your emails are scattered, and your naming conventions are inconsistent, Copilot has less to work with.

The security consideration

Copilot accesses whatever your Microsoft 365 users have permission to access. If your permissions are set up correctly — with least-privilege access controls — Copilot will only surface information each user is already authorized to see.

If your permissions are loose, Copilot can surface information that people technically have access to but were never meant to see easily. Before enabling Copilot widely, it is worth reviewing your Microsoft 365 permissions to make sure they reflect how your business actually works.

For firms handling client financial data, this is worth taking seriously. You do not want a staff member asking Copilot a question and getting back client information they should not be pulling up.

Is it worth it for a small business right now?

At $30 per user per month, it is hard to justify for every seat in a small business. The ROI depends heavily on how your team uses Microsoft 365 and whether the specific features Copilot offers match the work you actually do every day.

A reasonable approach: enable it for one or two power users, give it a 90-day trial, and measure whether it is actually saving meaningful time. If it is, expand it. If it is mostly a novelty, you have not committed the full cost.