How to start a plumbing business (costs and margin)

To start a plumbing business you need a trade licence in your own name, a business registration, liability cover and a bond, about $1,940 of tools if you start bare, and somewhere for work to land. That takes a few weeks. What decides whether the business pays you properly is how much of your day you spend billing, and how much you spend driving to a merchant for a fitting that should have been on the van.

This is written for a qualified plumber about to go out on their own. We build the software that small local trades run their bookings, deposits and rebooking on, so treat this as our view rather than neutral advice. It covers the launch cost, what the licence actually is, whether the hundred thousand a year figure survives a cost model, and the number inside your working day that moves your margin more than your rate does. It does not cover the trade itself or how to pass your exam, because other people teach those better than we could.

All figures are in US dollars as a reference point. The arithmetic works in any currency, so put your own numbers in and re-run it.

How much money do I need to start a plumbing company?

Three versions of the answer, priced as we would put them in a plan. Not better and worse, but different bets on how quickly the diary fills.

Two honest notes. No column includes the van, because we assume you have one, and if you do not then that line is larger than everything above it. And the bond varies more by place than anything else here, so treat $520 as a placeholder until your licensing authority gives you a real number.

The bare column is not a business. It is a way to test whether you can find work before spending real money. Without van stock you will make a merchant run on roughly every third job, the exact cost priced further down.

What licence do I need to start a plumbing business?

Four separate permissions get called a plumbing licence, which is why the answers contradict each other. They come from different offices and are not interchangeable.

1. The trade licence. Held by a person, not a company. Journeyman, master or the local equivalent, issued by a trade board after logged hours and an exam.
2. The contractor registration. Held by the business, and what lets you bid work and pull permits. It usually needs a licensed person named on it, which is why the two get confused.
3. The business registration. Sole trader, limited company or LLC, with your tax authority. Nothing to do with plumbing.
4. The bond and liability cover. Not a licence, but most places will not grant the contractor registration without both.

We are deliberately not publishing a region by region table, the same decision we took writing about whether you need a licence to groom dogs, because the published tables contradict each other and we will not invent a tidier one. Ask your local licensing authority four questions instead.

• Which licence class lets me work unsupervised, and who issues it?
• Does the business need its own contractor registration to pull permits?
• What bond and liability limit are required before that registration is granted?
• Which jobs need a permit and inspection, and who may apply?

That last question is the one people skip and then pay for. If you cannot pull the permit, you cannot invoice the job.

Do plumbers make 100k a year?

The top result on this search is a plumber telling another plumber that you only need to make $334 a day to make $100k. The claim is true in the way a headline is true. $334 across 300 working days is $100,200, and three hundred working days is six days a week for fifty weeks. It is also revenue, not income, with nothing taken out yet.

Here is the same rate on a five day year, 235 working days, against our cost model.

So $334 a day is a decent employed wage with the risk of ownership attached. To clear $100,000 before tax on the five day year, the same cost base needs $145,000 of revenue, or about $617 a day. That is the number to plan against, and the gap is not closed by charging more per hour. It is closed by billing more of the hours you already work.

What actually sets a plumbing margin

Take a service call priced at a $95 call out plus $110 an hour, quoted at an hour and a half on site. The labour invoice is $260 either way. What changes is how much of the day it eats.

Nearly twenty four dollars an hour, on an identical invoice, decided by whether the fitting was on the van.

Now scale it. Three calls a day across 235 days is 705 calls. Your first time fix rate is the share of those you finish on the first visit. At 70% that is 212 merchant runs a year, or 124 hours in traffic and a trade counter queue that nobody pays for. Converted back into calls, it is 55 jobs and about $14,300 of capacity.

Lift the rate to 85% and the runs drop to 106, the lost hours to 62, and you get roughly 27 calls back. That is about $7,020 a year from stocking the van better. No price rise, no new customer, no extra hour worked.

We should be straight rather than convenient here. Our software does not fix your first time fix rate. Van stock and job notes do. What we can show you is which jobs came back twice, because the customer record holds the history, and that is usually enough to spot the five fittings you keep driving for.

How do you get your first plumbing customers?

Put the booking link live before you tell anyone you have started, so the first person you mention it to has somewhere to land. A plumbing business is phone heavy and always will be. What matters is that the call, the merchant referral and the online booking end up in one diary, not three.

That is a live storefront we run, and it is an auto repair shop rather than a plumber. We have no plumbing demo tenant yet, so we are showing the nearest thing we actually operate rather than a mockup. It is the same job and work order shape plumbing needs. The other live sites are on our portfolio.

Four things that work in the first ninety days, in the order we would do them.

1. Work the people who already know your name. Merchants, letting agents, builders and the plumber you trained under. They send work before strangers do, and they send the kind that pays.
2. Take phone bookings into the same system. Most early work arrives by phone, and you can enter those bookings yourself so the record and the confirmation still happen.
3. Ask for the review while you are packing up. Not that evening, when the moment has gone.
4. Put the annual service on a schedule. Boiler services, backflow tests and water heater checks are this trade's nearest thing to a recurring visit, and rebooking reminders stop them lapsing.

On deposits we would take one on a booked install and none on an emergency call out. How you charge is a setting, not a policy, so you can run both. Our confirmations and reminders go out by email, not SMS, worth knowing in a trade where people are often on site.

Is it a good idea to start a plumbing business?

The demand is steady and the work is hard to offshore. The risk is almost never finding work. It is the hours you do not bill, the invoices that go out late, and a diary that fills reactively because the phone decides your week instead of you.

That is the failure mode we wrote about in how local service businesses get and keep customers, and it looks like the route density maths for landscaping and the payback maths for detailing. Different trade, same shape. The margin is in the gaps, not the rate card.

On pricing, what landscapers charge per hour works through the four things people mean by an hourly rate, and it applies to a plumbing quote. On retention, why online booking beats phone tag is the lever that does most. More under get more customers and on the plumbing hub.

Start bare if you need to, but budget for van stock earlier than feels comfortable. On our numbers it beats a price rise, and it is entirely in your control.