If you're asking when should a solo plumber hire a second plumber, here's the answer. Hire when demand has stayed above your own billable hours for several straight weeks, the extra calls would cover the new plumber's full cost, and you have cash to carry the slow first weeks. One wild week of burst pipes isn't the signal. A steady gap is, and three numbers will show it.
How do I measure whether there's enough work for a second plumber?
Measure the need by comparing three numbers every week: available technician hours, booked billable hours and demand turned away. Demand turned away means calls you couldn't take, jobs you pushed to next week, and callers who went elsewhere when you said Thursday. A notebook page with one column for each number is enough to start.
- Demand hours = booked billable hours + hours turned away
- Weekly gap = demand hours − available technician hours
- Utilization = booked billable hours ÷ available technician hours
Say you can finish eight one-hour service calls a day, but the phone brings ten. The two-call gap is roughly 10 extra billable hours a week, which is enough to test whether a second person could stay productive. Track the gap for at least several weeks, and write down the job type of every call you turn away, because the job types tell you who to hire.
What does a second plumber really cost each week?
A second plumber costs the wage plus everything else that comes with an employee. The Bureau of Labor Statistics puts the national median pay for plumbers, pipefitters and steamfitters at $63,800 a year, or $30.67 an hour, in May 2025. At that rate, 40 paid hours cost $1,226.80 a week in wages alone.
On top of wages come payroll taxes, workers' compensation, benefits, paid time off, training, a vehicle, tools and other overhead. Payroll, insurance and worker classification rules vary by state, so check with your state agency, an accountant or an attorney before you set pay. The national median isn't a local offer either: real pay depends on your market, experience, license level, specialty, on-call work and benefits.
Start looking before you're desperate. The same BLS occupation page counts about 510,600 jobs in 2025 and projects 7% growth from 2025 through 2035, with about 42,000 openings a year. An owner who waits until hiring is urgent may be shopping in a competitive market, and a national count says nothing about how many plumbers are free in your county.
Worked example: two service calls a day turned away
The prices here are examples only, so put in your own. A solo plumber runs eight one-hour calls a day and has turned away about two a day for six straight weeks. Most of those calls are drain clearings, toilet rebuilds and faucet replacements.
- Example average ticket: $260 per call
- Example parts and materials: $50 per call
- Example gross profit per call: $210
- Example fully loaded weekly cost of a second plumber: $1,700 (median wages plus taxes, insurance, truck and tools; yours will differ)
Break-even calls per week = fully loaded weekly cost ÷ gross profit per call. In the example, $1,700 ÷ $210 comes to about 8.1 calls. The 10 overflow calls bring in about $2,100 in gross profit, which leaves roughly $400 a week before callbacks, slow weeks and the first weeks when a new plumber works slower than you.
The thin margin hides a bigger problem: you pay for 40 hours, and the overflow fills only 10. The other 30 usually come from handing the new plumber some of your routine calls while you take estimates, water heater replacements and repipes. If your freed hours turn into booked work, the math improves, but if they go to dispatching, ordering parts, invoicing and chasing payments at night, nothing improves.
In this example the numbers support a test, not a full-time hire yet. Cover the gap with a helper, a part-time plumber or longer days for a few weeks. Hire when the gap grows or your freed hours prove they can sell work.
| Helper | Second plumber | |
|---|---|---|
| Median pay | $43,730/yr | $63,800/yr |
| Hourly benchmark | About $21.02 | $30.67 |
| Wages, 40 hours | $840.80 | $1,226.80 |
| What it adds | Speed on your truck | A second truck |
| Licensed tasks | Per state and local rules | Per license held |
When should a solo plumber hire a second plumber instead of a helper?
Hire a second plumber instead of a helper when the work you're turning away needs a licensed plumber to do it or to run it without you. Hire a helper when the gap is mostly carrying, digging, tear-out and cleanup that slow you down on bigger jobs. A helper makes your one truck faster, while a second plumber puts a second truck on the road.
A helper costs less. The BLS May 2025 wage data puts the national median for helpers to pipelayers, plumbers, pipefitters and steamfitters at $43,730 a year. Divided by 2,080 hours, that's about $21.02 an hour, or $840.80 for a 40-hour week, which is a simple conversion and not a quoted market wage or the full cost of employing a helper.
Licensing decides a lot here. Plumbing licenses, supervision rules, permit authority and who may do which tasks vary by state and often by city or county. Check with your local plumbing regulator before you send a helper or a newly licensed plumber to any job.
How do I hand off work without losing quality?
Hand off work by writing down what you used to keep in your head: the job, the access, the customer's history and what finished looks like. A new plumber can't match your standard if it lives only in your memory.
- Ride along first. Work the first week or two together, then split up on simple calls.
- A short checklist for each call type. For a toilet rebuild: shut-off checked, parts replaced, three test flushes, floor dry, area wiped down.
- Photos of finished work. Ask for the shut-off, the connection and the cleaned-up area, so you can check from home.
- Access notes on every job. Gate codes, dogs, where the cleanout is, which door the customer uses.
- A callback rule. Decide ahead of time who goes back when something leaks.
Should crews see what jobs cost?
Most owners hiring a first plumber keep prices private unless the new plumber will quote and collect in the field. A plumber who sees a $260 ticket without the truck, insurance, fuel and office time behind it can easily get the wrong idea about where the money goes. If the new plumber will price add-ons on site, like a worn shut-off valve found during a faucet swap, give them a written price sheet and a dollar limit they can approve without calling you.