The short answer
There's no single national number for how many calls a plumbing company misses after hours. It depends on your call volume, your hours, and whether you have any kind of backup system. But you can figure out your own number in about ten minutes, and that number matters more than any industry average would anyway.
What we can tell you for certain: every missed call after hours has a real cost, and for most plumbing companies, that cost is bigger than owners think. This guide shows you how to count your missed calls and put a dollar figure on them.
Why after-hours calls happen in the first place
Plumbing problems don't wait for business hours. A burst pipe, an overflowing toilet, a water heater that dies on a Saturday morning, these happen any time of day. That's exactly why so many calls come in at night, on weekends, and on holidays.
The people calling at 9 p.m. aren't being difficult. They have water on their floor right now. If you don't pick up, they call the next plumber on the list. Most of them won't wait until Monday and they usually won't call you back.
How to count your own missed calls
You don't need fancy software to start tracking this. Most phone systems, even basic cell phones, already log missed calls. Here's a simple way to get a real number for your business.
- Pull your call log for the last 30 days.
- Mark every call that came in before 7 a.m. or after 6 p.m., plus all weekend and holiday calls.
- Of those, count how many went to voicemail or rang without an answer.
- Divide that count by 30 to get your average missed after-hours calls per day.
- Multiply by 12 to get a rough monthly number.
Most owners who do this exercise are surprised. A one- or two-truck operation often finds five to fifteen missed after-hours calls a month once they actually count instead of guessing.
What each missed call actually costs
This is the part most owners get wrong. They think about the cost of one missed job, like a $200 drain cleaning. But the real cost has three layers.
Layer 1: The job itself. This is the easiest to picture. If a typical service call for your company runs $150 to $400, that's the immediate cash left on the table.
Layer 2: The repeat business. A plumbing customer isn't a one-time sale. Someone whose water heater you replace today might call you again in five years, refer a neighbor, or need annual maintenance. When they call a competitor instead because you didn't answer, you lose all of that future business too, not just today's job.
Layer 3: The word of mouth. People talk about who fixed their emergency and who ignored it. A homeowner who got a human voice at 10 p.m. tells their neighbors. A homeowner who got voicemail tells their neighbors too, just not in your favor.
A simple worksheet
Grab a pen and fill this in with your own numbers:
- Average job value: $______
- Missed after-hours calls per month (from the count above): ______
- Percentage of callers who are real, paying jobs (not wrong numbers or spam): ______%
- Estimated monthly lost revenue = Missed calls x Percentage x Average job value
For many plumbing companies, this single calculation is enough to justify fixing the problem. Even a modest number of missed calls, multiplied by a typical service ticket, adds up fast over a year.
What happens to a missed call, step by step
Understanding the sequence helps explain why the cost is so high.
- The customer has an emergency and searches for a plumber.
- They call the first two or three numbers they find.
- If no one answers, they move to the next name on the list within minutes, not hours.
- The plumber who answers gets the job, the deposit, and the long-term relationship.
- The plumbers who didn't answer never even know they lost the work.
That last point is important. Most owners who miss calls have no idea it's happening, because a missed call leaves no trace unless you go looking for it.
Options for covering after-hours calls
Once you know your number, you have a few realistic choices.
Rotate an on-call tech. This works but burns out your team and costs you overtime pay whether or not the call turns into a job.
Hire an answering service. A human answering service can take messages, but many just forward information to you the next morning, which doesn't help the customer with water on their floor right now.
Use a basic voicemail greeting. This is free but it's also the weakest option. Most emergency callers hang up and call the next number rather than leave a message.
Use an automated text-back. A missed call text back system sends an instant text when you can't answer, which keeps some customers from calling a competitor right away.
Use an AI receptionist that can actually book the job. This is the only option that answers every call immediately, asks the right questions, and puts the appointment on your calendar before you wake up. See how it works for the details on call handling and AI appointment booking for how jobs land on your Google or Outlook calendar automatically.
A quick phone script for your team (even without automation)
If you're not ready for automation yet, train whoever answers your after-hours line, even a family member, to use this short script:
- "Thanks for calling [Business Name]. Is this an emergency?"
- "Can I get your name, address, and the best number to reach you?"
- "What's going on with the plumbing, so I can get the right person out to you?"
- "I'll have someone call you back within [X minutes]. Hang tight."
The goal is simple: capture the lead and set a clear expectation. Silence is what loses the job, not a short hold time.
Where After Hours fits in
After Hours is an AI phone receptionist built for small service businesses like plumbing companies. It answers every call day or night, books the job straight onto your calendar, and sends true emergencies or anyone who asks for a person straight to your phone. It also answers in English or Spanish, which matters if any part of your customer base calls in Spanish, covered in more detail on our bilingual answering page.
Pricing starts at $99 a month for founding customers, which includes 250 minutes, with extra minutes billed at $2 each. There's a 14-day free trial, so you can run the numbers yourself before committing. Full details are on the pricing page.
FAQ
Do most missed calls during business hours matter as much as after-hours ones?
Missed calls always cost you something, but after-hours calls are often emergencies, so the caller is less willing to wait and more likely to call a competitor immediately.
How do I know if a missed call was a real lead and not spam?
Check your call log for callback numbers that match local area codes and look at how long the ring lasted. Real emergency callers usually call back within minutes if they get voicemail, so a second call from the same number is a good sign it was a real lead.
Is a human answering service good enough for after-hours calls?
It depends on the service. Some can book appointments directly, but many only take a message and pass it along the next business day, which doesn't help a customer who needs someone right now.
What if I only get a few calls a night? Is it still worth fixing?
Even a few missed calls a month add up over a year once you include the lost job, repeat business, and referrals. Run the worksheet in this article with your own numbers before deciding it's not worth it.