Speed to lead is the time between a customer sending you an enquiry and your first reply. Research shows it's one of the strongest predictors of whether an enquiry turns into business. Reply within 5 minutes instead of 30 and a lead is 21 times more likely to qualify.
Most businesses know speed matters. Few know how big the gap really is. Below are the numbers worth knowing, and what they mean for a business without a full sales team.
What the MIT study measured
The Lead Response Management study was led by James Oldroyd at MIT together with InsideSales. It analysed three years of data from six companies: more than 15,000 leads and more than 100,000 call attempts.
Two numbers stand out:
- 100 times more likely to reach a lead at all when you call within 5 minutes instead of 30.
- 21 times more likely to qualify that lead, for the same difference in time.
Worth being precise: these are contact and qualification odds, not closed revenue. But without contact and qualification there is no deal.
What the Harvard Business Review study found
In 2011, Oldroyd, McElheran and Elkington published a study of 2,241 US companies in Harvard Business Review. They sent each one a web enquiry and measured how fast it replied.
| Finding | Number |
|---|---|
| Qualification when replying within the hour, vs an hour later | nearly 7 times as often |
| Qualification when replying within the hour, vs after 24 hours or more | more than 60 times as often |
| Average time to first reply | 42 hours |
| Companies that never replied | 23% |
The 42-hour average says the most. A customer who enquires today has moved on to someone else within two days.
Why speed matters this much
People rarely send an enquiry to just one business. Someone looking for a plumber, a dentist or a supplier writes to several at once. The first reply sets the frame: the price, the slot, the feeling that someone is actually dealing with them.
The second reason is simpler. Interest fades fast. By the time a reply arrives two days later, the customer may have solved the problem or forgotten about it.
What this means for a small business
Large companies have sales teams waiting for enquiries. A small business has an owner who's with a client and a colleague who's already swamped. An enquiry that lands at 11:14pm on a Saturday waits until Monday.
The fix isn't to be on your phone all the time. It's making sure the first reply goes out immediately, whoever happens to be free.
How to reply within a minute without hiring
A speed-to-lead system does three things:
- Replies within a minute on your website form, Instagram or email, with the price, open slots and a question that moves things forward.
- Follows up when the customer goes quiet. Plenty of enquiries never get a second attempt, so one polite follow-up makes a real difference.
- Hands over to a person once the customer is serious, with the full context.
AI doesn't replace people here. A Harvard Business School study (Zhang and Narayandas) found that chat agents supported by AI replied 22% faster, and less experienced agents 70% faster. An NBER study (Brynjolfsson, Li and Raymond) measured 14% more issues resolved per hour across more than 5,000 agents.
How to measure your own response time
Before changing anything, measure where you are today:
- Send yourself a test enquiry through your website at different times, including evenings.
- Go through your last 20 enquiries and note the time to first reply.
- Count how many enquiries got no follow-up at all.
If your average is more than an hour, the research above suggests you're leaving a big share of deals on the table, deals you've already paid ads for.
How we fix that for you, with a reply within a minute even in the evenings and at weekends, is on the speed to lead page.
Frequently asked questions
How fast should I reply to an enquiry?
The MIT study found that a lead is 21 times more likely to qualify if you contact it within 5 minutes instead of 30. A good target is a reply within minutes, evenings and weekends included.
Is replying the same day good enough?
Same day beats never, but the Harvard Business Review study found that replying within the first hour made qualification nearly 7 times more likely than replying an hour later.
How can I reply fast if I'm with clients all day?
The first reply can come from a system that knows your prices, open slots and tone. You take over once the customer is serious and already has the basics.
Sources
- 01Oldroyd, MIT and InsideSales: Lead Response Management Study (2007)
- 02Oldroyd, McElheran and Elkington: The Short Life of Online Sales Leads, Harvard Business Review (2011)
- 03Zhang and Narayandas: Engaging Customers with AI in Online Chats, Management Science
- 04Brynjolfsson, Li and Raymond: Generative AI at Work, NBER Working Paper 31161 (2023)
Luka Tomič · Founder of Alra
Luka builds AI systems for Slovenian businesses that want to get more done with the same team. He writes about what he sees with clients: where time gets lost and how to get it back.