Direct answer: Aim for the same hour. The best-known evidence is a single study, published in Harvard Business Review in March 2011. It looked at 1.25 million leads at 42 U.S. companies and found firms that tried to reach a lead within an hour were nearly seven times as likely to qualify it as firms that waited even one more hour. It’s one study, it’s from 2011, and it measured hour buckets, not minutes. Treat it as a strong sign that delay costs you, then set up routing so a small team can actually hit the hour.
What the 2011 study can and can’t tell you
| It can tell you | It can’t tell you |
|---|---|
| Same-hour contact attempts did much better than later ones, across 29 B2C and 13 B2B companies | Whether 5 minutes beats 30. The data is in hour buckets |
| Waiting 24 hours or more was far worse (more than 60 times less likely to qualify) | How things look with today’s texting, chat, and booking tools |
| Speed mattered in many industries, not one | Your own numbers. Only your tracking can do that |
A routing plan for a team of one to five
The goal is that every lead gets a human attempt within the hour during business hours, and a clear next step after hours. Fill in the blanks with your own people and hours.
1. Put every lead in one place. Web forms, Google Business Profile messages, Meta lead ads, missed calls, and texts all feed one inbox or CRM. If leads land in four apps, someone misses one.
2. Assign by rule, not by whoever sees it.
Our suggested routing template (our recommendation, not research):
| Lead type | First owner | Backup if no attempt in 30 min | After hours |
|---|---|---|---|
| Phone call (missed) | Office lead | Owner | Text back with booking link, call first thing |
| Web form / quote request | Office lead | Owner | Auto-reply with when you’ll call; first call of the morning |
| Lead ad (Meta, Google) | Whoever’s on “lead duty” today | Office lead | Same as web form |
| Existing customer | Their usual contact | Office lead | Same as web form |
The 30-minute backup trigger is our suggestion, not a research number. We picked it so the backup person still has time to call inside the hour.
3. Rotate “lead duty” if everyone’s in the field. One person a day keeps their phone on and calls back between jobs. Everyone else is off the hook. It’s easier to keep up than “everyone watches the inbox.”
4. Set fixed call-back windows for field crews. If you’re on job sites, pick two or three set times a day to return calls and keep them. Same-morning beats next-day.
5. Write the first message once. A short script: who you are, that you got their request, one question that moves things forward (“What’s the address and a good time to look at it?”), and a booking link.
6. Track two numbers each week. Time from lead in to first human attempt, and how many of those leads booked. That’s your own version of the HBR data.
What to automate and what not to
Automate the instant acknowledgment, the booking link, reminders, and the “we missed you” text. Keep a person on the first real conversation, pricing, and anything unusual. The HBR measure was a conversation with a decision maker.
Aside: a 2025 Journal of Marketing study on automated lead nurturing (not response speed) found its effect depended on sales cycle length, expected sales volume, and prior relationship with the seller.
FAQ
What’s a good lead response time? Under an hour, based on the 2011 HBR study. Track your own numbers to see where your cutoff is.
Is responding in 5 minutes better than 30? The HBR data can’t answer that. Don’t claim minute-level gains from it.
Is the 2011 study still relevant? It’s still the most-cited large study, but it’s one study from 2011. Use it as direction, and back it with your own tracking.
Can an auto-reply count as a response? It helps the lead know you got the request. It isn’t the same as a conversation, which is what the study measured.
