Plumbing runs on urgency, and urgency compresses the sales cycle to nearly zero. A burst pipe or a failed water heater is booked within hours, usually with the first company that answers, which makes plumbing close rates the envy of the trades: 25 to 45 percent of leads become jobs, and the top of that band belongs to shops that answer around the clock.
The economics hinge on the ticket mix. Service calls (drain clearing, leaks, disposals) run $150 to $500; water heater replacements $1,500 to $3,500; repipes and sewer lines $4,000 to $15,000. A shop feeding mostly service calls can afford perhaps $40 per lead; one that consistently books water heaters and sewer work can pay double that and stay comfortable. Average job value is the single input worth the most care in this calculator for plumbers.
Water heaters deserve their own line in your thinking. They fail predictably (eight to twelve years), the replacement decision happens in an afternoon, and the ticket is meaningful. Lead sources that reach the homeowner at the moment of failure produce the best unit economics in residential plumbing, which is why those specific leads price above general plumbing leads in most markets.
Worked example
A worked example: a shop averaging $1,200 across its mix at 45% margin keeps $540 per job. At a 35% close, each lead carries $189 of value, and the divide-by-three ceiling lands near $63, right in the middle of the market band. Shift the mix toward water heaters and the average ticket climbs to $1,800; the same close rate lifts the ceiling to $94, clear of the median with room to spare.
The after-hours caveat: plumbing demand does not keep business hours, and neither do the best-converting leads. A shop that stops answering at 5 PM is buying leads it cannot close; the overnight answering arrangement often does more for lead economics than any bidding change.