Most self-employed tradespeople think of the phone as free. There’s no invoice for it. It doesn’t show up as a line item on anyone’s tax return. But the phone has three costs that are real, significant, and almost entirely invisible.
What does it cost to answer every call yourself?
Every call you answer during a job has a cost, even if it feels like it doesn’t.
A University of California, Irvine study on workplace interruptions found that it takes an average of 23 minutes to return to a task after an interruption. For office workers, that means lost productivity. For a tradesperson, the stakes are different. An electrician working in a consumer unit who stops to take a call isn’t just losing focus — they’re creating a safety risk. A roofer at height who reaches for their phone is doing something the HSE would have strong opinions about.
Even in less dangerous situations, the interruption has a real cost. A plumber diagnosing a leak who takes a five-minute call loses more than five minutes, because they need to re-establish where they were in the diagnostic process. A cleaner partway through a detailed job loses their rhythm. The work takes longer, or the quality drops slightly, or both.
Brad, a mobile mechanic we’ve spoken to, described the decision well. “Every time the phone buzzes, you’re making a choice. Answer it and lose your place in what you’re doing, or ignore it and maybe lose the work.” That calculation happens dozens of times a day, and it’s never free.
What does a missed call cost your business?
This is the bigger cost, and it’s the one nobody tracks.
Invoca’s research found that the average small business misses about a quarter of incoming calls. Of those, less than 3% of callers leave a voicemail. The rest call someone else.
For a tradesperson earning £200-400 per job, even losing one genuine enquiry per day adds up to something like £50,000-100,000 per year in potential revenue that went elsewhere. Not all of those calls would have converted, obviously. But even a fraction of them represents a substantial cost that appears nowhere in anyone’s accounts.
The callbacks that do happen are often delayed by hours or days, by which point the customer has frequently found someone else. The ones that never happen at all — callers who didn’t leave a voicemail, who simply tried the next number — are completely invisible.
How much time do callbacks actually take?
The third cost is the time spent returning calls, which is less dramatic but persistent.
Mark, a plumber, described his old evening routine: sitting in the van or at the kitchen table, working through voicemails, trying to piece together what each person needed. “You’d listen to the message, try to understand what the problem was, then call them back and hope they still needed a plumber.”
That process typically took him half an hour to an hour each evening. Over a five-day week, that’s three to five hours spent on callbacks — hours that come after a full day of physical work, when he’d rather be with his family. It’s unpaid admin layered on top of a demanding job.
The quality of those callbacks suffers too. A tired tradesperson at the end of a long day isn’t giving the best version of themselves on a sales call. The customer might not notice, but the conversion rate almost certainly reflects it.
What’s the real total cost?
The phone feels free because there’s no bill attached. But between the focus cost of answering during work, the invisible revenue lost to missed calls, and the evening hours spent on callbacks, the actual cost is probably one of the largest expenses in most small trade businesses. It just doesn’t look like an expense because nobody’s sending an invoice for it.
Recognising this doesn’t automatically fix it. But it does reframe the question. The decision isn’t “should I spend money on something to handle my calls.” It’s “am I already spending more by handling them myself.”
