What an AI chief of staff for a CFO actually does
A CFO's problem isn't a lack of information. It's that the few things that need them are buried in hundreds of emails, threads, reports and system alerts. An AI chief of staff does the reading so you can do the deciding.
What it is, and what it isn't
It isn't a chatbot you ask questions. It isn't an inbox summary either. A summary tells you what arrived; a chief of staff tells you what needs you, and why, and has already prepared the next step.
It is a scheduled process with a fixed shape: read, check, argue, cut, hand over. The output is a short brief, every item in it is traceable to its source, and every action it proposes is a draft waiting for you.
The desks
Each desk is an agent with read-only access to one area and a written brief of what counts as worth raising.
| Desk | Reads | Looks for |
|---|---|---|
| Finance | ERP, bank, AP and AR, close checklist | Cash below plan, large unusual payments, late close items, covenant headroom |
| Commercial | CRM, billing, customer email | Deals slipping out of quarter, discount requests over policy, at-risk renewals |
| Operations | Operational systems, vendor email | Cost overruns, supplier issues, capacity constraints with a financial effect |
| Legal | Contract repository, legal inbox | Renewal notice deadlines, unsigned amendments, new claims |
| People | HRIS, payroll summaries | Open approvals, headcount vs plan, payroll variances |
| Data | Pipelines, dashboards, metric definitions | Stale feeds, broken tie-outs, a metric that changed definition |
The reviewer and the challenger
Two passes sit between the desks and you. They are what make the brief trustworthy.
- The reviewer checks every figure against source. If a desk says cash is $1.2M below plan, the reviewer re-reads the bank balance and the plan and confirms the number, or strikes the item. Every surviving number links to the record it came from.
- The challenger argues against each item. Is this actually new? Is someone else already handling it? Is it a CFO decision, or could the controller take it? Items that can't survive the argument get cut or routed elsewhere.
The five-item rule
The brief holds at most five items, and an item only makes it if it passes one test: only you can decide it, or you need to know it before someone asks you. On a quiet day the brief has two items. That is the point. A brief that always has ten items becomes another inbox.
Everything that didn't make the cut sits in an appendix, grouped by desk, so you can see what was considered and why it was left out.
A sample brief
Illustrative only: a fictional $60M B2B software and services company, on an ordinary Tuesday.
| # | Item | Why you | Prepared |
|---|---|---|---|
| 1 | Decide: Sales is asking for a 22% discount on a $410K renewal. Policy limit is 15%. | Over policy; only the CFO can approve | Margin at 15%, 18% and 22%; drafted reply to the VP Sales with a counter at 18% |
| 2 | Know: Week-6 cash forecast is $340K below plan, mostly two large customers paying late. | You present cash to the board in nine days | The two invoices, each customer's normal days-to-pay, drafted collector notes |
| 3 | Decide: Office lease auto-renews for five years unless notice is given by Friday. | Commitment over your signing threshold | Clause and deadline; drafted notice letter if you choose not to renew |
| 4 | Know: The gross margin figure in last night's dashboard used the old definition after a data change. | The same figure is in the draft board pack | Corrected figure with both definitions shown; data owner already notified by draft |
| 5 | Decide: Auditor asked to move fieldwork forward one week. | Affects close calendar and team leave | Impact on close dates; drafted reply accepting with conditions |
Each item opens to its sources: the CRM opportunity, the bank feed, the lease PDF and clause, the metric definition, the email thread.
The guardrails
It drafts and flags. It never sends, approves or pays. Every reply, letter and approval in the brief is a draft. Nothing leaves the building, and no money moves, until you or the right owner acts.
- Read-only access to every system, scoped per desk.
- Every number opens its source, with the time it was read.
- One definition per metric, so the finance and commercial desks can't report different revenue. (See the number book guide.)
- Retire desks that don't earn their place. If a desk hasn't put an item in the brief in a month, cut it or narrow its brief.
Common mistakes
- Starting with all six desks. Start with finance and one other, get the brief right, then add.
- No cap on items. Without the five-item limit, the brief grows until you stop reading it.
- Skipping the challenger. Without it, every desk raises everything, and items you've already handled come back daily.
- Letting it act. The moment it can send an email on your behalf, you have to read everything it does. Keep it to drafts.
FAQ
What does an AI chief of staff for a CFO do?
Every weekday morning it reads the finance, commercial, operations, legal, people and data systems along with email, chat and documents, checks every figure against its source, argues against each item, and hands the CFO at most five items that only they can decide or need to know, each with a drafted next step.
Can an AI chief of staff send emails or approve payments?
No. It drafts replies, letters and approvals and flags risks, but it never sends, approves or pays. A person acts on every draft. That keeps authority with the people who hold it and means the CFO doesn't have to audit what the tool did overnight.
How long does it take to build an AI chief of staff?
A first version with a finance desk and one other desk, plus the reviewer and challenger passes, can usually run within a few weeks. More desks are added once the first brief is consistently useful, and desks that don't produce useful items are retired.
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