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How to follow up a cold email
Published November 11, 2026. Reply numbers from Sales.co sending records, October 6, 2025 to October 25, 2026, computed November 9, 2026.
Follow up a cold email twice. Send the first follow-up 8 to 14 days after the first email, as a short reply in the same thread that adds one new reason to talk and one small ask. In Sales.co's data the second email drew 0.46% human replies, close to the first email's 0.50%.
That comes from 1,160,878 people Sales.co cold emailed from 58 sending workspaces between October 6, 2025 and October 25, 2026. Each reply is credited to the email it answered, and each rate counts only people who had not replied yet. Follow-ups produced 26.3% of all human replies and 25.9% of interested ones.
This guide is for B2B founders and sales teams who send their own cold email and want to know how many follow-ups to send, when, and what to put in them. If you would rather have the whole sequence written and sent for you, Sales.co does it from $2,000 a month for up to 10,000 emails (pricing, read November 11, 2026); to weigh other agencies first, see the best cold email agencies for small business.
How many follow-ups to send
Two, so three emails in all. Each step below counts only the people who got that email before they had replied.
| Email in the sequence | Recipients | Human reply rate | Interested reply rate |
|---|---|---|---|
| 1 | 1,160,878 | 0.50% (5,757) | 0.144% (1,674) |
| 2 | 336,518 | 0.46% (1,558) | 0.135% (455) |
| 3 | 76,190 | 0.37% (282) | 0.108% (82) |
| 4 | 39,796 | 0.39% (156) | 0.083% (33) |
| 5 | 8,455 | 0.34% (29) | 0.083% (7) |
The second email kept 93% of the first email's human reply rate and the third kept 75%. With the largest sender removed, the second email still drew 0.457% against 0.462% for the first. Past the third email the counts get thin: 156 replies at step four and 29 at step five, with one sender making up 41% and 44% of those emails. Treat a fourth email as a test.
You will often read that 80% of sales need five follow-ups. HubSpot and Clevenio both state it with no source for the figure (both read November 11, 2026). Our numbers do not back planning for five: the fifth email produced 29 of 7,809 human replies, about 0.4%. The follow-up planner turns these rates into expected replies for your own list size.
When to send each follow-up
Wait 8 to 14 days before the first follow-up. That gap had the highest human and interested reply rates of the five we measured, and no single sender made up more than 10% of it.
| Days between email 1 and email 2 | Recipients | Human reply rate | Interested reply rate |
|---|---|---|---|
| 1-2 days | 3,453 | 0.35% (12) | 0.000% (0) |
| 3-4 days | 7,341 | 0.44% (32) | 0.068% (5) |
| 5-7 days | 15,821 | 0.47% (74) | 0.082% (13) |
| 8-14 days | 51,113 | 0.64% (325) | 0.262% (134) |
| 15+ days | 258,790 | 0.43% (1,115) | 0.117% (303) |
A follow-up one or two days later drew no interested reply from 3,453 people. For the third email the data is thinner (7 to 169 replies per row), but waiting longer again looked better than waiting less:
| Days between email 2 and email 3 | Recipients | Human reply rate |
|---|---|---|
| 1-2 days | 12,478 | 0.35% (44) |
| 3-4 days | 5,052 | 0.14% (7) |
| 5-7 days | 5,761 | 0.28% (16) |
| 8-14 days | 10,433 | 0.32% (33) |
| 15+ days | 40,326 | 0.42% (169) |
One sender made up 38% of the 15+ day row, so read it as a lean, not a rule. Send each email on a weekday during business hours; the best time to send study has the hour-by-hour numbers.
What to write in a follow-up
- Reply in the same thread. Keep the original subject so the first email sits right under the follow-up. The reader gets the context without you repeating it.
- Add one new thing. A number, a customer like them, a short idea for their business. "Just checking in" adds nothing, so it gives them no new reason to answer.
- Keep it under 60 words. The follow-up is a nudge, not a second pitch.
- End with one small ask. A yes or no question is easier to answer than a request for a call.
- Make the last one easy to close. Say it is your last note and that a one-word "no" is fine. A clear no lets you take them off the list.
Three examples written for this guide (not tracked templates), for a seller of bookkeeping services to dental practices:
The follow-up email templates page has eight more with the reply data behind each, and the template library has 164 first emails with their reply rates. Run any draft through the spam checker before it goes out.
Follow-up mistakes that cost replies
- Following up too soon. One or two days after the first email had the lowest human reply rate of the five gaps for the second email.
- Sending to people who already replied. Stop the sequence the moment anyone answers, including a "no". Our rates count only people who had not replied.
- Ignoring opt-outs. US law asks you to honor an opt-out within 10 business days; the cold email meaning guide lists the CAN-SPAM rules.
- Writing a guilt line. "Did you see my last email?" asks them to admit they ignored you. Give a new reason instead.
What these numbers do not tell you
- They are averages across 58 sending workspaces with different lists and offers. Your own rates can sit well above or below them.
- "Interested" is the sending tool's "possibly interested" label, not a booked meeting.
- The gap rows show which timing went with more replies, not that the gap caused them. Senders who wait longer may also write better follow-ups.
- Replies were counted for 14 days after each email; the window ends October 25, 2026.
The full method, with every cut, is on the follow-up reply rates study.
Sources
- Reply rates by step and by gap: Sales.co sending records, 1,987,046 sent emails to 1,160,878 recipients, October 6, 2025 to October 25, 2026, computed November 9, 2026.
- "80% of sales require at least five follow-ups": as stated on HubSpot's sales follow-up email article (no source given) and Clevenio's follow-up guide (no source given for that figure), read November 11, 2026.
- Opt-out rule (10 business days): Federal Trade Commission, CAN-SPAM Act: A Compliance Guide for Business, read November 8, 2026.
- Prices: Sales.co pricing page, read November 11, 2026.
FAQ
How many times should you follow up a cold email?
Two times, so three emails in all. In Sales.co's data the second email drew 0.46% human replies and the third 0.37%, against 0.50% for the first. The fourth and fifth emails drew 156 and 29 replies in all, too few to plan on.
How long should you wait to follow up on a cold email?
About 8 to 14 days. Second emails sent 8 to 14 days after the first drew 0.64% human replies and 0.26% interested replies (51,113 recipients), the best of the five gaps we measured. Sent 1 to 2 days later they drew 0.35% and no interested reply.
How do you politely follow up on a cold email?
Reply in the same thread, keep it under 60 words, add one new reason to talk (a number, a customer, a question about their business) and end with one small ask. Do not apologize for writing or ask if they saw the first email.
Do follow-up emails work?
Yes. In Sales.co's sending, follow-ups produced 26.3% of all human replies and 25.9% of interested replies across 1,160,878 recipients. Most of that came from the second email.
Is it true that 80% of sales need five follow-ups?
It is widely repeated, HubSpot and Clevenio both use it, but our data does not support planning for five. Fifth emails produced 29 of 7,809 human replies (0.4%) in our window, and most interested replies (74%) came from the first email.