Speed to lead: why you should reply to enquiries within 5 minutes

In How to get more leads we covered reply speed as one of six steps and looked at the data in hours: a business that gets back within the hour does much better than one that waits until tomorrow. This article goes down to minutes. It looks at where the much-quoted five-minute rule comes from, what the study behind it measured, and how a business where the owner handles enquiries between jobs can get close to five minutes.

What is speed to lead?

Speed to lead is the time between someone sending you an enquiry and your first real response. By a real response I mean a call, an answer to their question or an offer of an appointment. An automatic “thanks, we’ll be in touch” email confirms receipt. It isn’t a response.

You can measure it separately for each channel:

• Website form: from submission to the first call or personal message.
• Missed call: from the missed call to a call back or a text.
• WhatsApp, Messenger, email or a directory such as Checkatrade or Bark: from arrival to the first reply from a person, or from an AI that can answer properly.

Where the five-minute rule comes from

The figure that turns up in sales articles comes from a study called Lead Response Management. It was produced by the US company InsideSales.com with James Oldroyd, then a faculty fellow at MIT’s Sloan School of Management. David Elkington and James Oldroyd presented the results in October 2007 at a MarketingSherpa conference.

According to the research summary, the authors looked at three years of data from six companies that generate leads online: over 15,000 leads and over 100,000 call attempts. They wanted to know when to call so that the company reaches the person and qualifies the lead. In the study, “qualified” means the person agrees to enter the sales process, for example by booking an appointment. The summary states that the study did not look at closed sales.

The most quoted findings:

• The odds of reaching the person were about 100 times higher when the call came within 5 minutes than after 30 minutes.
• The odds of qualifying the lead were about 21 times higher within 5 minutes than after 30 minutes.
• Between minute 5 and minute 10, the odds of reaching the person fell about fivefold, and the odds of qualifying fell fourfold.
• Over the first hour, the odds of reaching the person fell more than tenfold, and of qualifying more than sixfold.

How to read these numbers

The study is usually quoted without context. Keep these points in mind:

• The odds are per call attempt. The study compares how often a call leads to contact or qualification. It doesn’t say that a business calling within five minutes sells 100 times more.
• The author sold the solution. InsideSales.com sold software for calling leads, so it had an interest in showing that speed matters. As far as we can find, the study was presented at a conference and not published in a peer-reviewed journal.
• The data is old and American. It covers the years up to 2007 and six companies. The authors also mention that their software was used heavily by mortgage and insurance firms, where the same lead is often sold to several companies at once.
• Fast firms may differ in other ways. A company that calls within five minutes probably runs its sales better overall. The study doesn’t prove that speed alone caused the difference.

A later article by Oldroyd and two co-authors in Harvard Business Review (March 2011) used a different data set and found the same pattern on a scale of hours. We go through its figures in How to get more leads, so I won’t repeat them here.

How fast businesses actually respond

During 2013, InsideSales.com sent a test enquiry through the websites of US companies and published the results in its 2014 Lead Response Report. Of the 9,538 companies that received an enquiry, 47% never responded. Among the companies that responded by phone, the median time to the first call was 3 hours and 8 minutes. For the smallest group in the report, firms with up to 300 employees, it was 2 hours and 22 minutes.

Again, this is a vendor’s survey of American companies, with test enquiries sent only during working hours. For a UK service business the lesson is that a reply within a few minutes will probably put you among the first.

Why minutes matter for a small business

You can’t transfer the exact numbers from a US study to a plumber in Leeds. The mechanism behind them is the same, though.

Someone who has just filled in your form has their phone in their hand and is thinking about the problem. Half an hour later they’re in a meeting, cooking dinner or talking to another firm. People looking for a boiler repair or a bathroom refit often contact several businesses at once. The first to respond learns the details, books a visit and usually sets the standard the others are measured against.

Here’s an example. On a Tuesday at 7:40pm, a homeowner fills in the form on three plumbers’ websites about a leaking hot water cylinder. The first plumber texts her within a few minutes, asks whether it’s a vented or unvented cylinder and offers a visit on Wednesday. The second calls on Wednesday morning. The third gets back on Friday. Most owners can guess who gets the job.

Speed matters less for large projects chosen over weeks, or when a friend recommended you and the customer isn’t shopping around. Even then, an instant confirmation with a time for your next contact beats silence.

What counts as a response

Replies come in levels:

Level	What the person gets	Realistic speed
Confirmation	An automatic email or text saying the enquiry arrived and when you’ll be in touch	Within seconds
First real reply	A text or message with a specific question or a link to book a time	Within a few minutes
Call	A person or an AI assistant calls, asks questions and agrees the next step	A few minutes to half an hour
Quote or visit	A price, a survey date, a consultation	Hours to days

The five-minute target makes sense for the second and third levels. Nobody expects a quote in five minutes. They want to know someone is dealing with it and what happens next.

How a small business gets to minutes

An owner who is also the engineer won’t answer every call or form within five minutes, and doesn’t need to. A setup that runs on its own does most of the work, and a person steps in when needed.

1. Measure where you are now

Send yourself an enquiry through your website and any directory you’re listed on, and call your number when everyone is busy. Note when and how each was answered, then do the same with two competitors.

2. Put every enquiry in one place

If the form goes to one inbox, Facebook messages go to a colleague’s phone and missed calls go nowhere, a fast reply isn’t possible. Every channel should end up on a single contact record in one system. Our unified inbox page shows what that looks like.

3. Send an alert to one named person

An email to a shared inbox is everyone’s job, which means nobody’s. A new enquiry should send a notification to the phone of whoever is on duty, with their name against it in the system. If nobody touches the enquiry within a set time, say 15 minutes, a second person or the owner gets an alert.

4. Send an automatic first reply

A text and an email can go out within a minute of the form being sent. They work better when they include a question or a next step as well as a thank-you. For example:

Hi Sarah, thanks for your enquiry about the hot water cylinder. Is it vented or unvented? If you’d like to book a visit now, pick a time here: [link]. Dan, [business name]

The link goes to a booking calendar that shows only free slots. Someone who picks a time themselves doesn’t have to wait for your call.

5. Text back after a missed call

When nobody answers, the caller automatically gets a text: “Sorry I missed you, I’m on a job. Reply with what you need and I’ll get back to you as soon as I can.” The call becomes a written conversation you can answer between tasks. It’s usually the simplest automation to set up and the quickest to show results.

6. Use an AI receptionist and AI calls for new enquiries

The next step is an AI assistant that answers or makes the call:

• Incoming calls nobody answers go to an AI receptionist. It finds out what the caller needs, answers common questions and books them into the calendar. We cover the setup in AI receptionist: how to stop losing missed calls.
• For form enquiries, the AI can call within a few minutes, ask for the details and book a survey. Put a tick box on the form so the person agrees to a call, and say that the call may be made by an AI assistant.

You can hear what a call like this sounds like. Our AI voice agents page explains what they handle; we’ve run 1,700,000+ AI calls over 3.5 years since 2022.

7. Use a pipeline that flags what’s stuck

A fast first reply is wasted if the enquiry then waits three days for a quote. In a sales pipeline, every enquiry sits in a stage (new, contacted, visit booked, quote sent) and the system flags anything that has stayed in a stage too long. There are examples of these rules on our automation page.

8. Make an honest promise out of hours

Don’t promise five minutes at night or at weekends if you can’t keep it. Give a specific time (“we’ll call you on Monday by 9am”) and stick to it. A business that calls exactly when it said it would comes across better than one that promised “as soon as possible”.

How to measure your response time

Three figures are enough:

• The median time to first response, not the average. One enquiry you found a week late wrecks the average and tells you nothing about a normal day.
• The share of enquiries answered within 5 minutes and within 1 hour.
• The same figures per channel. Forms may be quick while Facebook messages sit until the evening.

A CRM records these times automatically if every enquiry starts there. I’d check them weekly until they’re where you want them, then monthly.

To estimate what unanswered calls might be costing you, try the missed-call calculator. It only uses the figures you enter.

Mistakes that cancel out a fast reply

• An automatic reply that says nothing. “Your message is important to us” with no time and no next step is more likely to irritate.
• A fast call with no preparation. If you call within a minute and don’t know what they asked for, you lose the advantage. Read the enquiry first, or have the AI summarise it.
• Calling ten times. In the 2007 study, extra call attempts after about 20 hours made contact less likely, not more. Mix a call, a text and an email, and stop after a few tries.
• Calling from an unknown number. People who enquired online may not answer a number they don’t recognise. Put the number you’ll call from in the confirmation text. The ICO says you must show your number on calls in any case.
• Treating a reply as permission to market. Under PECR, a call or message someone specifically asked for is solicited, and the ICO says most of the marketing rules don’t apply to it. Replying to the enquiry and arranging the job is fine. Later marketing is another matter. Marketing texts and emails to individuals need consent under regulation 22, unless the soft opt-in applies. Live marketing calls must not go to numbers registered with the Telephone Preference Service (TPS) without consent. Automated marketing calls under regulation 19 need consent that specifically covers them. Regulation 19 was written for recorded messages, and the ICO guidance we checked doesn’t say how it treats AI voice agents, so I’d get that specific consent before any AI marketing calls. The ICO’s PECR guidance is under review after the Data (Use and Access) Act 2025, so check the current version before a campaign.

Where to start

1. Send a test enquiry through your website and call your own number during working hours. Note when and how you were answered.
2. Turn on an automatic text after a missed call.
3. Rewrite the automatic reply to your form so it asks a question or offers a booking link.
4. Decide who handles enquiries during working hours and set up phone alerts for them.
5. After a month, look at the median time to first response and decide whether you need an AI receptionist or AI calls for new enquiries.