Claude now runs inside Excel as a native Microsoft add-in — and it's already on your Pro plan. For consultants, that means two things: a faster internal workflow for your own analysis, and a clean, low-friction service to sell to clients who live in spreadsheets and don't know how to use AI there yet.
The setup takes about 15 minutes. The service it enables bills $500–$1,500 per engagement. This page covers both.
The tools
Claude
Claude for Excel is an official Microsoft 365 add-in available to all Pro, Max, Team, and Enterprise subscribers since January 24, 2026. Install it from the Microsoft Marketplace (search "Claude by Anthropic for Excel"), activate from Home → Add-ins in Excel, and sign in with your Anthropic account.
Once live, Claude appears as a side panel with Ctrl+Alt+C (Windows) or Ctrl+Option+C (Mac). You can ask questions about any workbook and get answers with cell-level citations, update assumptions while preserving formula dependencies, debug formula errors, build new models or populate templates, apply conditional formatting and data validation, and work across multi-tab workbooks without losing context. A March 2026 update added shared context with PowerPoint — analysis from a sheet feeds straight into a slide deck.
Price: Pro $20/mo (includes Excel add-in access); Max $100/mo; Team $30/user/mo. What to charge: $500–$1,500 flat-fee setup for a client's Excel environment, $150–$300/mo to maintain the AI layer and train new staff.
Zapier
Zapier connects the Excel outputs to the rest of a client's stack: pipe a completed forecast into a Google Sheet for the finance team, trigger a Slack notification when a specific cell changes value, or log submitted forms into a master tracker automatically. The combination of Claude's in-cell analysis and Zapier's outbound automation turns a static spreadsheet into an active system.
Price: free plan (100 tasks/mo); Starter from $19.99/mo billed annually. What to charge: $1,500–$2,500 for the automation build, then $250–$500/mo ongoing for monitoring and Zap updates.
Gamma
Gamma closes the client loop: pull the analysis Claude ran in Excel, paste the key findings into Gamma, and deliver a polished deck with charts and formatted slides — in under an hour. For consultants who run monthly or quarterly business reviews, this is the deliverable that makes the engagement tangible.
Price: free tier; Plus ~$9/mo annual, Pro ~$18/mo annual. What to charge: $500–$1,000 per report package (analysis + deck), sold as a monthly retainer.
A workflow that sells
The Excel automation install — what to actually do in a client engagement:
- Scope the workbooks. In the discovery call, identify the 2–3 spreadsheets the client opens every day (P&L, pipeline, inventory). These become the target.
- Install and configure Claude. Add the Microsoft 365 add-in under the client's account or walk them through self-install. Set up the Claude Pro or Team account if they don't have one — that's billable time ($150/hr or included in setup).
- Train them on 5 prompts. Most clients need: "summarize this sheet for a non-finance person," "find the formula error in column D," "build a 3-month rolling average for rows 10–40," "flag any assumptions I should double-check," and "turn this data into a slide I can send to my boss." Practice each one live during handoff.
- Connect one Zapier automation. Pick the most tedious manual step — usually "copy cells from this sheet into an email" or "paste the weekly total into Slack." One live automation doubles their perceived ROI before you leave.
- Package findings in Gamma. The output of session 1 becomes the case study you show your next prospect.
Done in one day. Documented in a 3-page SOD that becomes your process asset.
The money
Typical package: $750 flat fee for the install + 1 Zapier automation + walkthrough; $200/mo retainer for monthly check-ins and prompt library updates. At two setups per month and one retained client per quarter, this adds $1,500–$2,400/mo on a $40/mo tool spend.
The upgrade path: sell an "Excel AI ops audit" for $1,500 first — map all the client's spreadsheet pain, prioritize 3–5 automation wins, and then sell the build on top. Audit finds the problems; implementation scope comes out of the findings.
See the full consultant stack at AI tools for consultants. For the non-Excel version of AI automation, check Make vs. Zapier: which MCP server should you use? and what is Zapier.
FAQ
Do clients need a Claude Pro plan for this to work?
Yes — the Excel add-in requires at least Claude Pro ($20/mo per seat). Team plan ($30/user/mo) is better for any company with more than one person in the spreadsheets. For your own work, one Pro account covers personal use.
Does Claude for Excel work on Mac?
Yes. The add-in works on Excel for Mac and Excel for Windows. It also works in the Excel web app (office.com), though some native operations like conditional formatting work better in the desktop app.
What Excel tasks can Claude actually automate?
Claude can analyze, explain, and modify existing workbooks — it's not writing macros by default. It handles formula debugging, data summaries, assumption updates, pivot table guidance, conditional formatting, and data validation. For full automation (running code, scheduled pulls), pair it with Zapier or a VBA layer.
How is this different from ChatGPT in Excel?
Anthropic's Claude add-in is a first-party Microsoft Marketplace integration with cell-level context and shared context across Excel and PowerPoint. ChatGPT also has Excel integration but the Claude version is more precise on long, multi-tab workbooks based on current testing. Either beats manually copying data into a chat window.
Can I resell this as a managed service?
Yes. The most common model: you hold the master add-in setup process and charge clients a setup fee + monthly retainer while they own their own Claude subscription. You're selling the setup, training, and ongoing optimization — not the license.