How fast should you reply to a new enquiry, and how to actually do it

A new enquiry rarely arrives at a convenient moment. The web form comes in while a job is mid-flow, the call rings out while both hands are busy, the email lands at half past seven in the evening. The reasonable thought that follows is that it can wait an hour, or until the end of the day, and the customer will understand. Often they do. The trouble is that, by the time the reply goes out, a good share of those people have already heard back from someone else. This is about how quickly a new enquiry really needs a reply, and, more usefully, how a small team can hit that without sitting by a phone all day.

What the evidence actually says about speed

The idea that a fast reply wins more work is not new, and it has held up across two decades of fairly consistent data. The study most people are quoting, even when they do not know it, is a 2007 piece of research from MIT Sloan and a sales-software company that examined over 15,000 web-form leads. It found that the odds of reaching a lead called within five minutes, rather than thirty, were dramatically higher, and the odds of qualifying that lead, meaning a real conversation rather than just contact, higher again 1. A 2011 Harvard Business Review article from overlapping authors put numbers on the same effect: firms that responded within an hour were close to seven times as likely to qualify a lead as those that waited just one hour longer 2. This is where the so-called five-minute rule comes from.

It is worth being plain about where those headline figures originate. The research was co-authored with a company that sells sales software, so the famous multipliers are best treated as the study that popularised the idea rather than as neutral fact. What gives the idea weight is that independent, recent data points the same way. A 2025 to 2026 benchmark of 939 B2B companies found the average lead response time was around 47 hours, with only 23% replying within five minutes and roughly four in ten taking longer than a day 3. The gap between what wins work and what most firms actually do has barely moved in fifteen years.

The customer side of this is just as telling. Research on service expectations finds that most people now rate an immediate response as important, and a large share define immediate as ten minutes or less 5. Expectations have moved faster than most businesses have. A reply that would have felt prompt a decade ago can now feel slow.

One honest caveat runs through all of this: the speed studies above are US and global business-to-business data, mostly about web-form leads rather than phone calls or a local trade. They describe a direction of travel, not a precise figure for any one UK business. Where the cost of slowness has been measured in the UK, the picture is consistent. BT research from 2014 estimated the cost of a single missed business call at around £1,200, and found that callers would typically try twice at most before taking their business elsewhere, with a fifth saying they would try just once 4.

Why “fast” is really “first”

The useful reframe is that speed is mostly a proxy for being first. A customer with an urgent problem, a leaking pipe, a deadline, a quote they need today, is usually contacting more than one firm. The first to respond well is not just faster; they are often the only one in the conversation before a decision gets made. Everyone who replies later is replying to someone who has, in effect, already half-chosen.

That is also why the gap persists despite everyone knowing speed matters. The reasons firms are slow tend to be structural rather than careless, and the HBR authors named most of them: enquiries are pulled out of a system in a daily batch rather than seen as they arrive, leads sit unattended in a shared inbox with no clear owner, and nobody is quite sure whose job the new one is 2. None of that is solved by trying harder. It is solved by changing how an enquiry is caught and routed the moment it lands.

A five-minute first reply without a phone desk

The good news is that a fast first response is largely a matter of mechanics, and most of them do not need anyone sitting by a phone. The aim is not to answer everything in person within five minutes, which has a hard ceiling for a small team. It is to make sure no enquiry goes nowhere, and that the customer hears something useful almost immediately. A handful of pieces, working together, get most teams there.

Send an instant acknowledgement. An automatic reply to a web form or a returned text to a call buys the window. It tells the customer they have reached the right place, that a person will be in touch shortly, and roughly when. It is not the real reply, but it stops the customer dialling the next number while they wait, which is the behaviour the BT research describes 4.

Capture everything up front. The first human reply is far more useful when it does not have to start with “what do you need?”. A web form that asks for the job, the location and a contact number, in plain terms, means the follow-up can already be about the work rather than about gathering basics. It also means a missed call can be turned into something actionable rather than a blank voicemail.

Turn missed calls into texts. For the calls that genuinely cannot be taken live, an automatic text back, sent the moment the call ends, keeps the enquiry alive. It acknowledges the caller, invites them to reply with what they need, and moves the conversation to a channel a busy person can answer between jobs.

Give every enquiry one owner. Most slow replies are not slow because nobody saw the enquiry. They are slow because everybody assumed someone else had it. One shared inbox, one simple routing rule, and a clear owner for each new enquiry removes the gap where leads sit untouched.

Set a light target, and measure it. A simple internal standard, for example acknowledge within five minutes automatically and follow up with a person within the hour, turns a good intention into something a team can actually check. It does not need to be elaborate. It needs to exist and to be looked at.

Plan for out of hours. A real share of enquiries arrive in the evening, at weekends, and over bank holidays, precisely when a small team is least able to answer. An after-hours acknowledgement, or a screened answering route, means those enquiries are caught rather than lost to the next morning, by which point the customer has often already booked someone.

None of these replaces the human reply. They protect the time until it can happen, and they make that reply, when it comes, faster and better informed.

A simple rule for what to automate and what to keep human

The line to draw is straightforward: automation should buy time, not replace the conversation. The decision for any new enquiry comes down to two questions. Is it in working hours, and can someone take it live right now? If yes, the best response is still a person answering. If not, the enquiry gets an instant acknowledgement and goes into the queue with its owner, ready for a quick personal follow-up. The same logic covers a missed call, an out-of-hours form, and a busy afternoon on site.

The automation is never the relationship. It is the thing that keeps the door open until a person can walk through it, so that being busy stops quietly costing new work.

Worth a closer look

This is the part hirevolution helps with: catching every enquiry whatever the time, capturing what the customer needs, and getting a fast, personal first response back, so a full day’s work does not mean a cold list of callbacks by evening.

See how hirevolution approaches lead capture and fast first response