A CFO reads your email for one thing: does this spend pay for itself, and when? If the answer is on one page with the math visible, you get a reply. If it's in a feature list, you get a forward to someone who will never answer.
Here is the memo to send, a sample with numbers that add up, and the calendar that decides whether your email lands in a live budget or a closed one.
What a CFO actually decides
At a company with 20 to 200 people, the CFO or finance director rarely picks the product. A department head does: operations wants a scheduling system, HR wants a training platform, sales wants a data tool. The CFO decides whether it gets funded, and when. Three questions come up every time:
- Is it in the budget, or does it need a variance?
- What does it replace, and what does it cost to switch?
- How many months until it has paid for itself?
If you can answer all three in a short document, the department head who wants you can walk it into the CFO's office. If you can't, the department head gets a polite no and can't explain why.
Budget season is the window
For most companies on a calendar fiscal year, next year's budget gets built between September and November, and approved in December. Money is set aside in the fall that can't be found in March. A request that arrives in October is a line item. The same request in April is a negotiation to cut something else.
Other triggers open the door off-cycle: an audit finding, a headcount freeze (software that avoids a hire looks good), a cost-cutting memo, or a failed system that finance had to work around. If you know a company's fiscal year ends June 30, move your window to January through March. A CFO who is closing the books in the last two weeks of a quarter won't read anything. Send in the first week.
Finding the CFO or controller by name
At smaller companies, the title may be Controller, VP Finance or Director of Finance. At very small ones, the owner or a part-time outsourced CFO does it. Check the company's leadership page, press releases, and state filings for named officers. Our guide to finding decision-makers covers the steps. Aim for the person who signs the budget, not the accounts-payable clerk.
The payback memo
One page. Four blocks. Here is the template with a worked example: a company that pays an outside firm to do monthly data entry for its sales commission reports.
- Cost today. What the problem costs per year, from numbers the CFO can verify. Example: 14 hours a month of finance staff time at a loaded $48 an hour is $672 a month. Plus an outside bookkeeper for corrections at $350 a month. Total $1,022 a month, or $12,264 a year.
- Cost with you. Your price, all in. Example: a commission-calculation tool at $480 a month plus a one-time $1,800 setup. Year one: $5,760 plus $1,800 is $7,560.
- Net and break-even. Savings per month: $1,022 minus $480 is $542. Break-even on the $1,800 setup: 1,800 divided by 542 is 3.3 months. Year-one net saving: $12,264 minus $7,560 is $4,704.
- Risk and exit. What happens if it doesn't work. Example: month-to-month after the first quarter, data exportable at any time.
Show the arithmetic in the memo, not just the answer. A CFO will recompute it, and a number they can reproduce is more believable than one they can't. Mark estimates as estimates. If the 14 hours is the department head's guess, say so, and ask for the actual figure. That honesty is why the memo gets forwarded.
A first email to a CFO, with a sample
Subject: $4,700 first-year saving on commission reporting
Hi Janet, your operations team mentioned that monthly commission reports take about 14 hours of finance time plus an outside bookkeeper for corrections. I put the numbers on one page: current cost about $12,264 a year, with our tool about $7,560 in year one including setup, break-even in just over three months. I've marked which figures are estimates. Would it be useful if I sent it over? Owen Doyle, [mailing address]. If this isn't yours to decide, tell me who owns the budget and I'll send it to them. Reply "no" and I'll stop.
Notice the subject line is a number, and the email stops short of asking for a meeting. The ask is "may I send you a page," which costs the CFO almost nothing to say yes to.
Following up by asking who owns the budget
If the CFO doesn't reply in five days, don't resend the same message. Ask a different question: "Is commission reporting part of next year's budget, or a spend that would need approval separately?" It's a yes-or-no question that helps you place the deal. If the answer is "it's already in," you accelerate. If it's "it's frozen until Q2," you pick a date, write it down, and come back.
The meetings with decision-makers guide covers what to do when the CFO's assistant is the reply. Keep the cost per deal in mind too: customer acquisition cost shows how long a sales cycle can run before it stops paying.
Getting a department head to champion you
You need a person inside who wants it. Send them the memo too, with a short note: "Here is the one-page version for finance. Please correct any figure I got wrong." A department head who edits your memo is a champion. They know their numbers better than you, and the CFO trusts them more than you.
For smaller firms that cannot afford a full-time CFO, see the fractional CFO guide, which describes the same buyer from the other side.
Every CFO email in the fall is a separate small project: find the name, write the memo, follow up at the right time. Rocketship finds the finance leaders by name, emails them from your own Gmail, follows up, and books the meeting on its own. Plans that get you customers start at $24.99 a month (Launch), and both Launch and Frontier start with a 7-day free trial, card required. The AI workers keep the follow-ups moving.