Start with whichever stage loses you the most paid jobs. If you miss more than a handful of calls a week, fix calls first. If you win under a third of the quotes you send, fix quotes. If most quotes go quiet, fix follow-up. Run a one-week trial on that one before touching the others.
The catch is that the three stages rarely leak equally, and owners usually guess the wrong one. A firm that answers every call can still lose a third of its quotes to silence, and a firm with a tight quoting habit can lose more work to voicemail than to price. The numbers that settle it take about twenty minutes to pull from last month's phone log and quote list, and an illustrative two-van firm below shows the count, the ranking and a one-week trial for each stage.
Count where the jobs leak
A plumbing enquiry travels through three doors. The caller reaches you or does not. You send a quote or you do not. The customer accepts or the quote goes quiet. Each door loses a share, and the three shares are rarely equal. Counting them takes four numbers from last month.
- Calls received and calls missed. Your phone's call log or phone system shows both. Count only calls from new numbers; ignore suppliers and existing customers' repeat calls.
- Quotes sent. From your invoicing software or sent folder.
- Quotes accepted. The ones that became jobs.
- Quotes with no reply. The ones where the customer never said yes or no.
Then work out three leak rates: missed calls as a share of all new calls, quotes not accepted as a share of quotes sent, and silent quotes as a share of those not accepted. Silent quotes are the ones follow-up could recover. Refused quotes are mostly about price, and no message fixes that.
An illustrative two-van firm
Take a plumbing firm with two vans and a part-time office person. Last month it logged 120 calls from new numbers, of which 30 went unanswered and 8 called back, leaving 22 lost callers. It sent 55 quotes and won 22. Of the 33 it did not win, 12 were turned down on price and 21 went silent. The average job is worth $420 before materials, and a typical conversion of a reached caller to a quote is one in two.
The leaks in money. Missed calls: 22 lost callers, half would have become quotes, 11 quotes, and at the firm's 40 per cent win rate about 4.4 jobs, around $1,850. Quotes refused on price: 12, no message recovers these. Silent quotes: 21, and a good follow-up might win back one in six, roughly 3.5 jobs, about $1,470. Quote drafting speed: the office person writes 55 quotes at 25 minutes each, 23 hours a month; the money is time, not jobs, at roughly $20 an hour about $460 of wages.
On these figures calls come first, follow-up second, quote drafting third. Change the numbers and the order changes, which is the point of counting. A firm with two people always at the phone and 3 missed calls a month should start with follow-up. A firm that never sends a second message should too.
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Buy nowCalls, follow-up and drafting ranked side by side
| Stage | Leak in the example | Set-up effort | Risk if it goes wrong | Ranking |
|---|---|---|---|---|
| Calls | 22 lost callers, about $1,850 a month | Medium: routing rules and testing | High if emergencies are mishandled | 1 |
| Follow-up | 21 silent quotes, about $1,470 a month | Low: three saved messages | Low | 2 |
| Quote drafting | 23 office hours, about $460 a month | Low to medium | Medium: wrong scope or price | 3 |
Notice that the highest payback is also the riskiest, which is common. A sensible rule is: when two stages are within about 30 per cent of each other in payback, start with the lower-risk one; when one is far ahead, start there but build in the safeguards. Here calls are about 25 per cent ahead of follow-up, so a cautious owner could reasonably start with follow-up and add calls a week later.
Trial 1: calls, one week
The goal of the week is to find out how many lost callers you can recover and whether the routing is safe. You do not need to buy an AI receptionist to start. Day one, set up a missed-call text: "Sorry I missed you, I'm on a job. Reply with what's wrong and I'll ring back within the hour. If water is coming through a ceiling, call [number] now. If you smell gas, leave the property and ring the gas emergency number." Many phone apps and job systems can send it.
If your count says an AI receptionist is worth testing, set the routing before turning it on. Write the calls that must reach a person at once: burst pipe or water running, no heating for an elderly or vulnerable customer, gas smell, sewage backing up. Test with five scripts: a routine tap repair, a burst pipe, a gas smell, a landlord with three flats and a pushy salesperson. Illustrative result: four handled correctly; the burst pipe was booked for the next morning. Rewrite the burst-pipe rule and test again until all five pass.
Know the cost model before you commit. Jobber's Receptionist costs $29 a month as an add-on to selected plans (it is included on Plus) and covers 30 conversations, then $0.79 each, and you decide in advance whether it keeps answering past 30 and charges, or pauses. Housecall Pro's paid CSR AI call answering and ServiceTitan show no public price. For a one-van plumber the arithmetic is covered in Jobber AI receptionist pricing for a one-van plumber, and for the emergency rules, AI receptionist costs and burst-pipe rules.
What to measure at the end of the week: calls received, calls answered by the system, calls routed to you, bookings made, and any call that went wrong. If more than one in ten calls was mishandled, switch it off and rewrite the rules.
Trial 2: follow-up, one week
This is the cheapest trial and often the best. Take every open quote older than three days and send a follow-up. Ask an assistant such as ChatGPT or Claude for a three-message sequence. The first is a friendly check at day three. The second at day seven offers to answer questions or adjust the scope. The third at day fourteen says the quote expires on a stated date.
Write three short follow-up messages for a plumbing quote that
has had no reply. Message 1 (day 3): friendly check, 35 words.
Message 2 (day 7): offer to answer questions or adjust the scope,
45 words. Message 3 (day 14): say the quote is valid until [date],
40 words, no pressure. Plain English. Sign "[your name]".
Job: replace a leaking bathroom basin tap and isolation valve,
quote $[amount] sent on [date].Illustrative output: three short texts at the right tone, the last giving the expiry date. What you fix: the assistant may add "we have limited availability this month", a pressure line you cannot back up. Delete it. Also check that the amounts and dates are the ones you supplied.
Send follow-ups to the 21 silent quotes, personalising the job description in each. Expected result on the example figures: one in six replies positively, about 3 or 4 jobs, and several replies that tell you why the customer went quiet, which is useful in itself. Measure replies, jobs won and complaints. If someone says they did not want to be chased, stop messaging them and note it. Time cost: about 3 minutes per quote including your read-through, so about an hour.
Trial 3: quote drafting, one week
Quoting is where the risk of a wrong word is highest, so the trial is about wording, not pricing. The price stays yours. Give the assistant the survey notes and your own price, and ask for the scope, assumptions and exclusions. The tutorial on whether a plumber can use AI to write quotes covers what each section must say.
Write the scope of a plumbing quote from these notes in short
numbered points. Add an "Assumptions" line and a "Not included"
line using only what I give. Mark anything unclear "TO CONFIRM".
Notes: replace 120L unvented cylinder, existing location, new
tundish and discharge pipe to match existing, flush system,
2 days, hot water off one day; making good tiling not included;
access to loft assumed clear; price $[amount].Illustrative output: a six-point scope, an assumptions line that mentions clear loft access, and a not-included line that mentions tiling. What you fix: if the draft says "all work to current regulations" when you did not say that, remove it and decide what you are able to promise. Track minutes per quote and the number of drafts that needed a material correction across ten quotes. A fair target is under one in five needing a material correction and a time saving of at least 10 minutes a quote.
The same count for three other kinds of plumbing firm
The two-van firm is one shape. The ranking moves with the business, and these three illustrative variations show how.
A one-van plumber who works alone
He takes 40 new calls a month and misses 15 because both hands are busy. He sends 20 quotes and wins 9, and 8 of the 11 lost quotes went silent. Lost callers: 15, of which perhaps 7 would have become quotes and 3 jobs, about $1,260 at $420 a job. Silent quotes: 8, with a one in six recovery, about 1.3 jobs, $560. Calls clearly lead, but the cost of a receptionist for 15 conversations a month is small, so the only question is safety. He should test the emergency routing hard, because there is no office person to catch a mistake.
A ten-van firm with a dedicated office team
Two people answer phones, so missed calls are low: 12 out of 400. The leak is quotes: 180 sent, 54 won, and the office team spends most of its day typing them. Quote drafting becomes the lead job, since saving 12 minutes on each of 180 quotes returns 36 hours a month. Follow-up second, because with this volume nobody has time to chase. Calls last, perhaps only for out-of-hours cover. At this size, check whether your job software already includes drafting and follow-up features before paying for anything extra. The tutorial on monthly software cost by van count helps with that.
A firm whose work is mostly landlords and managing agents
Calls are few and quotes are often approved by a third party who takes a week to respond. Silence does not mean refusal; it means a queue. Follow-up here is less about chasing and more about keeping the quote visible: a short note on day four asking whether the approver needs anything further, such as a photo, a breakdown or a second price. Drafting an itemised breakdown is where the assistant helps most, since managing agents ask for the same detail every time.
When the quote is refused on price
Twelve refusals on price in the main example are the one leak no assistant fixes, but it can help you handle the conversation. If a customer replies "too expensive", the instinct is to cut the price or go quiet. A better first step is a short message that asks what they were expecting and offers to adjust the scope, for example a basic repair now and the larger replacement later.
Illustrative before and after. Before: the customer says the boiler quote is more than they expected, and the plumber replies "Let me know if you want to go ahead." After, drafted with the assistant and read before sending: "Thanks for letting me know, [first name]. If it helps, I can break the quote into the essential work and the optional extras so you can see where the cost sits. Would that be useful?" The second reply keeps the conversation open and gives you information about what the customer values. It also prevents the assistant-style trap of offering a discount you did not intend. Add a line to the prompt: "Do not offer a discount or change the price."
How to check the trial worked
A trial is only useful if you write the result down. For calls, record how many callers replied to the missed-call text, how many you rang back, and how many booked. For follow-up, record how many quotes were messaged, how many replied, how many were won and how many people asked you to stop. For drafting, record minutes before and after across ten quotes and the number of material corrections.
Then check the money against the tool cost. A $20 monthly assistant plan, or a receptionist add-on at tens of dollars for the volume you handle, is covered by a single extra job a month at $420. If a trial recovers nothing, look at the cause before dropping it: a follow-up that goes to the wrong job type, a missed-call text sent when the caller has already left a voicemail, or a quote scope that confuses the customer. Fix the cause, run the week again, and only then decide. A trial that fails twice for the same reason has told you that stage is not where your jobs leak.
What to leave alone
Four things stay with you whichever trial you run. Diagnosis: whether a fault is dangerous or what is causing it is your call, not an assistant's reading of a customer's description. Gas work and anything requiring a registered engineer's judgement and signature. Pricing, which depends on your margin and the property. And anything with legal effect: warranties, formal notices, final demands. The assistant drafts; you read; you send.
The same applies to anything involving customer safety advice. A reply to "I can smell gas" has one correct form: leave the property, call the emergency gas number, and do not use switches. Write that as a fixed message in your own words and keep it out of drafting entirely.
The boiler customer who got a tap-repair chaser
An illustrative example. A plumber set up follow-up messages and let them go out automatically from a template, with the job description filled in by the software. One went to a customer whose quote was for a boiler replacement, but the template talked about "your tap repair". The customer, already unsure, took it as a sign the firm was careless and booked someone else.
The cause was a template field pulling the wrong job type. The fix was to send the first ten follow-ups by hand after checking each, and only automate once the job description came through correctly in all ten. The general rule is to read every message in a new sequence until you have seen it work cleanly ten times.
Deciding after a week
At the end of each trial write three lines: what it saved or won, what went wrong, and whether to keep it. Illustrative for the example firm: the missed-call text recovered 4 of the week's 7 missed calls and 2 became jobs, about $840; the follow-ups won back 3 quotes, $1,260; quote drafting saved about 2 hours across the week's 13 quotes. All three are worth keeping, in the order of payback and risk, and the combined effect is a few thousand dollars a month against tool costs of tens of dollars, though every figure here is an estimate that your own tally should replace.
If the trials show less than expected, that is information too. A firm with few missed calls and a strong quote habit may find the best gain is somewhere else. The tutorial on saving five hours a week on admin with AI looks at other places the time hides, and what a solo, two-van and ten-van firm should buy helps once you know which stage matters. Counting your own leaks with someone else is one of the things an AI implementation consultation does, and the contact page is where to arrange it. Other trades in the series are listed in the AI hub.
Questions plumbers ask about starting with AI
Should a one-van plumber buy ServiceTitan or Jobber for AI?
Not for the AI alone. Job software earns its fee through scheduling, quoting and invoicing, and AI features are an extra on some plans. ServiceTitan lists no public prices, and Jobber's receptionist is a priced add-on on selected plans. Run the one-week trial with a chat assistant first, then buy software only if a real gap remains.
What if I lose jobs in all three places?
Fix calls first when you are missing more than a handful a week, because a lost caller is lost for good. Fix quotes first when you win under a third of the ones you send. Fix follow-up first when most quotes simply go quiet. If the numbers are close, start with whichever needs the least set-up, usually follow-up.
Can an AI receptionist handle a burst pipe?
It can take details and pass the call to you, but you must write in advance which calls count as emergencies and test that they reach a person at once. Water running, gas smells and flooding should never wait for a callback. Test with several scripts before relying on it out of hours.
Is it safe to put customer details into ChatGPT or Claude?
Use first names and job descriptions rather than full addresses, phone numbers or payment details. Check the privacy settings on your plan and switch off training use if it is offered. Business plans generally do not train on your content by default, but confirm that on the vendor's own page for the plan you choose.
Further reads
- 10 ChatGPT Prompts for Plumbers: Call-Backs, Quotes, Complaints — Ten prompts for call-backs, quotes and complaints.
- Housecall Pro CSR AI vs Jobber's AI Receptionist: Which Suits a Plumber? — Housecall Pro CSR AI against Jobber's receptionist.
- AI Voice Agent for Plumbers: A 15-Call Test Before It Takes Real Jobs — A 15-call test before a voice agent takes real jobs.
- Can AI Triage Emergency Plumbing Calls Out of Hours? — How out-of-hours emergency triage should be set up.
- How to Use AI in a Plumbing Business: A 30-Day Setup Plan — A 30-day plan once the first stage is fixed.
- Angi Leads for Plumbers and HVAC: Worked Cost per Job and AI Follow-Up — Cost per job and AI follow-up for bought leads.
- MyBuilder vs Checkatrade for Plumbers: Cost per Job, With AI Replies — How MyBuilder and Checkatrade bill, one month costed per job won on both, and a six-week test of whether faster AI-drafted replies pay.
- AI Marketing for Plumbers: A Worked 12-Month Posts and Offers Calendar — A worked 12-month calendar for a five-van plumbing firm: frozen pipes, boiler checks, heater age and drain season, with AI drafts and a review step.
- Tradie Admin: A Weekly AI Routine for Quotes, Invoices and Messages — A 60-minute Friday routine with prompts for chasing quotes, raising invoices and answering customer messages, plus what to automate later.
- Best AI for Plumbing Questions: A Ten-Question Test for Plumbers — A ten-question test plumbers can run on ChatGPT, Claude and Gemini, with a scoring sheet and the checks to make before acting on any answer.
- What an AI Agent Can Do for a Plumber After the Call Ends — After the call ends, an AI agent can confirm bookings, ask for photos, chase quotes and invoices and request reviews. What to hand over and what to approve.
- AI Tools and AI Development: The Complete 2026 Guide — the AI hub, including every tutorial in the AI-for-business series.
Sources: Jobber and ServiceTitan vendor pages, ChatGPT and Claude plan pages; the firm, call counts and all figures in the worked example are illustrative.