ChatGPT prompts for finance

5 copy-paste ChatGPT prompts for the finance work that eats your week: build a 13-week cash flow forecast, explain budget vs actual variances, write the monthly management report, check a spend request against policy, and write the board or investor finance update. Free, works in any ChatGPT window - fill in the brackets.

How to use: Replace every bracketed field and attach or link the named sources. Review the result before any external action.

1. Build a 13-week cash flow forecast

Use when: You need to know if the money lasts the quarter.

Copy prompt:

You are a finance lead building a 13-week cash flow forecast. I'll paste our current bank balance and a list of expected money in and out. Build a week-by-week table: opening balance, money in (customer receipts / other), money out (payroll, rent, vendors, tax, other), closing balance. Flag every week the balance drops below [safety line, e.g. one month of payroll] with a note on what caused it. Then give me: the 3 biggest cash risks, the 3 payments I could move if a week goes red, and 5 questions to ask the team before I trust this forecast. If a number is missing or unclear, ask me before guessing.

Opening balance today: [$]
Money in: [paste: who pays, how much, when]
Money out: [paste: what, how much, when]

Expected output: A week-by-week forecast with the dangerous weeks flagged and a risk list.

Boundary: It builds from what you paste; it can't see your bank.

2. Explain budget vs actual variances

Use when: The numbers are in and everyone's asking why they're off.

Copy prompt:

You are a finance lead writing the variance notes for the monthly pack. For each line below, write a 2-3 sentence explanation a non-finance founder can read: what happened, whether it's timing (will fix itself next month) or real (we actually spent or earned differently), and what to watch next month. Plain words, no accounting jargon. If I didn't give you a reason, write the 2 most likely causes as questions to check, not as facts. End with a 3-line summary for the top of the pack: the one big win, the one big miss, the one thing to watch.

The numbers: [paste budget vs actual, line by line]
What I know so far: [any context: hires, campaigns, one-offs]

Expected output: Plain-English variance notes plus a 3-line summary.

Boundary: It drafts from your inputs; you confirm the real causes.

3. Write the monthly management report

Use when: Month-end close is done and the pack is due.

Copy prompt:

You are a finance lead writing the monthly management report. Turn the numbers below into a 1-page report: revenue, gross margin, biggest costs, cash position, runway. For each: this month, last month, and one plain sentence on why it moved. Then a "so what" section: 3 things the numbers are telling us and 2 decisions they point to. Write for a busy founder reading on their phone - short lines, no jargon, no filler like "it is important to note". If a number looks wrong or is missing, list it at the end as a question instead of guessing.

This month's numbers: [paste]
Last month's numbers: [paste]
Anything big that happened: [new hire, big customer, refund]

Expected output: A 1-page report a founder reads in 2 minutes.

Boundary: You check the numbers before it goes out.

4. Check a spend request against policy

Use when: A purchase request lands and you're the gatekeeper.

Copy prompt:

You are the finance gatekeeper. Check this spend request against our policy below. Reply with: APPROVE, NEEDS INFO, or ESCALATE, then one line on why. Quote the exact policy line that decides it. If the request is missing details the policy needs (quote, business reason, budget line), list exactly what's missing so I can ask once. If it's close to a limit, say how close. Never approve something the policy doesn't clearly allow.

Our policy: [paste spending policy, or bullet the rules: limits, who approves what, what needs quotes]
The request: [paste what they want to buy, cost, reason]
Requester's level: [role/team]

Expected output: A decision with the policy line quoted, or a short missing-info list.

Boundary: It applies the policy you paste; edge cases stay with you.

5. Write the board or investor finance update

Use when: Investors expect numbers and you have 30 minutes.

Copy prompt:

You are a founder's finance lead writing the monthly investor update. From the numbers below, write a 5-sentence update: revenue and growth, burn, runway, one win, one honest concern. Investors skim - put the numbers first, no greeting, no "hope this finds you well". Add a small table with the 4 key metrics (this month vs last). If runway is under 6 months, say so plainly and add one line on the plan. Never round in a way that hides a miss.

Numbers: [revenue, burn, cash, runway]
Win: [..]
Concern: [..]

Expected output: A send-ready update with a metric table.

Boundary: Your name is on it - read the numbers twice.

Last updated 15 September 2026 · Reviewed by the AI Agent Skills team.