Plan on somewhere between 200 and 800 delivered emails for each client on a $2,000 service, and between 125 and 500 for a $300 one. The spread depends almost entirely on one number: the share of people you email who write back interested. At 4% you're near the low end. At 1% you're near the high end. These are my own assumptions worked through, not a benchmark, and the rest of this article shows the arithmetic so you can swap in your numbers.

A lot of posts answer this with a single borrowed figure, "one client per 50 emails" or "send 15,000 before you book anything." Neither helps you plan next month, because the answer changes with your price, your list and how many meetings turn into customers.

The chain, and the three assumptions in it

Every client comes through the same four steps: delivered email, interested reply, meeting, client. I'll use these assumptions throughout:

  • Interested reply rate: 1%, 2% or 4% of delivered emails. "Interested" means the person asked a question or said yes to talking. A "no thanks" doesn't count.
  • Half of interested replies become a meeting. The rest say "send info" and go quiet.
  • 25% of meetings close for a $2,000 service. 40% close for a $300 service, since the decision is smaller and faster.

All three are guesses to be replaced by your own counts. They're plausible for a small service business writing to a tight list, but yours could be half or double.

A $2,000 service: Mara's bookkeeping cleanup

Mara is a freelance bookkeeper. Her offer is a flat $2,000 to clean up a small company's books before tax season. Per 1,000 delivered emails, the chain looks like this:

Interested rate Interested Meetings Clients Emails per client
1% 10 5 1.25 800
2% 20 10 2.5 400
4% 40 20 5 200

Take the middle row. At 2%, Mara needs 400 delivered emails per client. Say each one takes her 5 minutes to find the person and write a note, so 400 emails is about 33 hours. Add the 4 meetings it takes to close one client, at 45 minutes each, and that is another 3 hours. About 36 hours of work for $2,000, or roughly $55 an hour. That is a fair return for the first client and a good one once the list and the email are tuned.

Here is one way her first two months could go. Month one: 200 delivered, 5 interested replies, 2 meetings, 0 clients. Month two: 200 delivered, 4 interested, 3 meetings, 1 client. Total 400 delivered for one $2,000 client. Month one felt like failure. It wasn't. At those rates the expected number of clients from 200 emails is 200 × 2% × 50% × 25%, which is 0.5. Zero was the most likely result.

A $300 service: Theo's site tune-up

Theo fixes slow, broken small-business websites: speed, a form that doesn't send, a page that breaks on phones. He charges $300 per tune-up. With the same 2% interested rate and a 40% close rate on meetings (shorter calls, smaller decision), 1,000 delivered emails give 20 interested replies, 10 meetings and 4 clients. That is 250 emails per client and $1,200 per 1,000 sent.

The hours are the problem. 250 emails at 5 minutes each is about 21 hours, plus 2.5 meetings at 30 minutes for each client, so around 22 hours for $300. That is under $14 an hour, from cold email alone, written by hand.

The general lesson is that the lower the price, the less hand-written cold email can pay for itself. A $300 job needs one of three things: a recurring fee (a $300 tune-up that leads to a $75-a-month care plan is $1,200 over a year), a way to send without spending 5 minutes per email, or a list so tight that the interested rate is 4% or more.

Why 50 emails tell you more than 5, and 150 more than 50

With a true interested rate of 2%, the chance of getting zero interested replies is 0.98 raised to the number of emails. After 5 emails that is about 90%. After 50 it is about 36%. After 150 it is about 5%. So zero replies from your first 5 says nothing, and zero from 50 is still a one-in-three event even when your email is fine. Zero from 150 is worth acting on.

That's the reason to decide in batches of at least 50 and judge after 150. Our guide to testing a cold email with 50 prospects sets out how to split and compare, and how to count your reply rate shows which denominators to use.

Which number to fix first

Fix the earliest step that is weak, because everything after it multiplies. Moving Mara's interested rate from 2% to 4% doubles her clients without changing anything else. Moving her close rate from 25% to 30% adds a fifth. Work in this order: the list (who you write to), the offer (what you propose and for how much), the email, and last the follow-up. Only look at your close rate once the first three are producing meetings. Diagnosing a cold email by symptom goes step by step.

When the numbers look bad

If you measure 1% and a $300 job, the math says 500 emails per client and about 40 hours of work. Options, in order of ease: raise the price or add a recurring plan, narrow the list to people who clearly have the problem, or change the offer from a service to a small, concrete result ("I'll fix your contact form for $75"). What not to do is write a more clever subject line and send another 500.

One sheet to track it

Make a sheet with a row per week and these columns: sent, delivered, interested, meetings, clients, revenue. Add two formulas: delivered divided by clients (emails per client) and revenue divided by hours. Update it every Friday. After a month you have your own table, and it will beat anything in this article, mine included. For the broader cost side, see customer acquisition cost for a small business, and how many leads you need to get a customer. If you want ready wording for the later stages, sales email templates by stage covers meeting requests through quote follow-ups.

The 5-minutes-per-email cost is where hand-written outreach loses at low prices. Rocketship finds the buyers, emails them from your own Gmail, follows up, and books the meeting on its own, so your hours go to the meetings, not the sending. 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. See how the AI workers run outreach.