How to value a plumbing business: the short answer
To value a plumbing business, restate what the shop really earns, then multiply that figure by a multiple a buyer would accept. The value is earnings times a multiple. Revenue alone is not the value, and neither is the price of the trucks and tools.
That is the standard small-business valuation method, and it is the one behind the multiples from BizBuySell and Kroll cited later in this article. The method is simple to state. The work is in getting the earnings figure right and picking a multiple that fits a shop your size.
Any single figure is an opinion of value, whether it comes from a broker, an online calculator or a buyer's first call. It is an estimate, not a price. What your plumbing business is worth in practice is whatever a buyer pays after reading the books.
This article gives the method, and it gives ranges only where a named source supplies them. It does not hand out a number for your shop. If a page tells you the real value of your company before anyone has seen your financials, treat it as a guess. Know what your business earns first, then ask what it is worth.
The value is earnings times a multiple.
Start with earnings: seller's discretionary earnings and what you add back
Buyers of small, owner-run shops usually start from seller's discretionary earnings. That is net profit with the owner's salary, the owner's perks run through the business, and one-off costs added back. It suits an owner who works in the business, because it shows what one working owner takes out of the shop in total. Shops this size are typically valued on that figure.
Adding back the salary only holds if a replacement manager would not cost the same money. If a buyer has to hire someone to run dispatch and quote the jobs you quote now, the buyer will take that cost back out. A figure that adds back your pay and ignores the cost of replacing you is one a buyer will rebuild in the first week.
Net profit and profit margins come from the P&L, not from the bank balance. Cash flow in a good month of the busy season is not earnings. A buyer looks at a full year and at how steady it was, so start from your year-end statements rather than from what the account looks like today.
Here is an invented illustration, not a real shop. Say net profit is $120,000. The owner draws $70,000, and a one-off $10,000 legal bill sits in the year. Adding those back gives $200,000. If the buyer then says a general manager would cost $70,000, the figure the buyer will use is $130,000.
That gap is why the base number matters more than the multiple. Everything used to value the shop afterward is built on it, and anyone buying or selling a business will check it.
Adding back the salary only holds if a replacement manager would not cost the same money.
Valuation multiples for plumbing businesses
Once the earnings figure is settled, the multiple is the next question. A multiple is the number your earnings are multiplied by to reach a price. It varies because a buyer is pricing risk. A shop that runs without its owner, with steady repeat work, looks safer than one that does not, and the safer shop gets the higher multiple. The best-sourced range for plumbing comes from sold listings.
BizBuySell's plumbing benchmarks cover 226 plumbing businesses sold on its marketplace from 2021 to 2025, with median revenue of $1,174,514. The average sale price was 2.49 times seller's discretionary earnings, and the middle half of sales fell between 1.66 and 3.15 times. BizBuySell's page says a plumbing business with over $2 million in annual sales may sell for more than 3 times, and one under $600,000 in sales may sell for under 2 times.
Read those as multiples of discretionary earnings for small owner-run shops, drawn from one marketplace's sold listings. The word is may. Small plumbing companies tend to sit lower and larger plumbing businesses higher, but no source here promises where your shop lands.
The platform view is separate. Kroll, a transaction advisory firm, wrote on 4 November 2025 that private equity buyers were paying double-digit multiples of EBITDA, in the mid-teens, for high quality residential HVAC platforms, especially those with significant recurring revenue. It said smaller add-on deals for family and founder-owned businesses generally traded at three to eight times.
That note covers residential HVAC services, not plumbing. It states no sample, it is the firm's own commentary, and it does not predict a price for any one shop.
Check which earnings measure a multiple applies to. A multiple of discretionary earnings and a multiple of EBITDA are not interchangeable, and putting one on the other's base gives a wrong market value by a wide margin. Market conditions also move multiples between years, so date every figure you use, as the two above are dated. A purchase price or asking price you saw two years ago is not a benchmark for today, and being at the top of the market once does not mean it holds.
Home services as a whole is valued on similar logic. For cross-trade multiples, see our piece on home services business valuation and multiples.
A multiple of discretionary earnings and a multiple of EBITDA are not interchangeable, and putting one on the other's base gives a wrong market value by a wide margin.
What pushes the multiple up or down
A buyer reads your shop for risk. These are the parts he reads first, and most of them you can check on your own board.
Owner involvement comes first. If you run the dispatch board, quote the big jobs and hold the customer relationships, a buyer sees a service business that stops when you do. It is the factor most within a plumbing contractor's control.
Recurring revenue and repeat business, such as maintenance agreements, lower the risk to a buyer. Work out what share of your revenue is recurring. No source can tell you that. It comes from your own books, and you need to measure it before a buyer asks.
Residential service and repair work and commercial plumbing carry different risks, so buyers weigh them differently. This article does not claim which is worth more, because no named source supports a claim either way.
The customer base matters too. Concentration in a few contractors or builders is a risk, while a broad base of homeowners is not. Online presence and positive reviews are evidence a buyer can check in an afternoon on your public listing, so he will see your online presence before you do.
Underneath all of it, a buyer is paying for the future of the business under a new owner, not for the work the old owner did last year. Every factor above is a question about whether that future looks like the past without you in it.
Kroll's note shows what a larger buyer reads. It says buyers examine the target's labor model, technician productivity, customer churn and retention, and the recurring revenue breakdown. That is what a buyer reads, and it makes no claim about what any shop is worth. It is a useful list of what to be able to answer about your own plumbing services.
Underneath all of it, a buyer is paying for the future of the business under a new owner, not for the work the old owner did last year.
Get your books in order before anyone values them
A valuation is only as reliable as the financials it starts from. A buyer's diligence compares your P&L to your tax returns and bank statements. Gaps between them lower the price or end the deal, and plumbing companies often have such gaps from owner expenses run through the shop.
Cash versus accrual matters here. Cash-basis books can make a month look better or worse than the work done, because money lands when it is paid, not when the job is finished. Our piece on financial management, bookkeeping, and cash vs accrual accounting covers how to set this up for a plumbing shop.
Job costing by type of work shows which jobs earn the margin a buyer will pay for.
If a plumbing company's records cannot show margin by type of work, a buyer will assume the average is hiding the weak jobs.
A valuation is only as reliable as the financials it starts from.
Broker, M&A advisor or calculator: who gives you a number, and what they get paid
With the books in order, you have three ways to get an outside number, and each suits a different moment.
A business broker usually sells smaller owner-run companies and is paid on the sale. An M&A advisor usually handles larger deals. No dividing size is given here, because we have no named source for one. Check each firm's own page for the size of deal it takes.
An online business valuation calculator gives a rough estimate from a few inputs. It is a reasonable first look, and it is not a valuation. Read what inputs it asks for, what it costs and whether it asks for your contact details before it shows a number.
Whoever stands to be paid on a sale has an incentive to give a figure that wins the listing. That is our own position, and we state it as ours, not as a finding. A number given before anyone has looked at your books is a pitch, and a sales pitch is not a diagnosis.
A broker is the right choice when you have decided to sell and want someone to run the process: finding buyers, screening them and managing the paperwork. If you want to sell your plumbing business and have clean books, that help is worth paying for. If you are only wondering what it is worth, start with your own earnings before you sign a listing for a business sale or let anyone list the business among the businesses for sale.
Whoever stands to be paid on a sale has an incentive to give a figure that wins the listing.
Roll-ups and platforms: when a larger buyer is the buyer
If the buyer is a consolidator rather than an individual, the deal changes. Plumbing platforms, usually backed by private equity, buy shops to combine them. Their price and terms differ from an individual buyer's. Our wider piece on private equity consolidation, roll-ups, and acquisition due diligence covers how.
A platform buyer's diligence is more formal, so the point about books above matters more, not less. Expect the same comparison of P&L, tax returns and bank statements, done by people who do it for a living.
Kroll quotes platform prices as multiples of EBITDA, not of discretionary earnings, so the BizBuySell range above does not carry over to a platform deal. The only platform figures we cite are Kroll's, and they cover residential HVAC. Kroll also says platforms now favor businesses with upgraded dispatch and mobile invoicing. That is the firm's own observation, and it tells you what a platform looks at before an offer.
Raising the value before you go to market
Everything above points to a short list of work you can start on your own shop.
Reduce dependence on the owner. Document how jobs are quoted and dispatched, and move customer relationships to staff. The owner-involvement factor is the one a buyer reads first, and it is the one you can change without spending much.
Build recurring revenue deliberately, and measure it so you can show it to a buyer. A maintenance agreement list that you cannot count is not evidence.
Plan the year's budget and seasonal cash flow so earnings are steady and the books show it. Our piece on annual budgeting, cash flow forecasting, and seasonal planning covers the method.
These changes take longer than one season to show in the earnings a buyer reads. A buyer looks at the trend over several periods, so start well before you plan to sell if you want to increase the value of what he sees.
These changes take longer than one season to show in the earnings a buyer reads.
How much is a business worth with $1,000,000 in sales?
Sales alone does not set the price. Two shops with $1,000,000 in sales can earn very different profits, and the profit decides the value.
The method is to restate earnings as a buyer would, then apply a sourced multiple. BizBuySell's plumbing benchmarks give an average of 2.49 times discretionary earnings, from sold listings. This article gives no dollar answer, because the earnings that multiple applies to are yours to calculate.
How much is the average plumbing business worth?
BizBuySell reports a median sale price of $638,730 across the 226 plumbing businesses sold on its marketplace from 2021 to 2025. Median revenue in that group was $1,174,514, and median owner earnings were $311,598.
By year, the median sale price ran from $450,000 in 2021 to $837,500 in 2025. These are small owner-run shops sold through one marketplace, so the figure describes that sample. The useful question is what your own shop would sell for, and the earlier sections explain how to estimate it.
How much is a business worth with $500,000 in sales?
The method is the same as for $1,000,000 in sales: restate earnings, then apply a sourced multiple. At this size the owner often is the business, so owner involvement weighs heavily on the multiple.
BizBuySell's benchmarks point the same way on size: a plumbing business under $600,000 in annual sales may sell for under 2 times discretionary earnings. This article gives no dollar figure for a shop at this size, because the earnings behind it are your own.
Key Takeaways
A plumbing business is valued as earnings times a multiple, not as revenue.
Buyers use earnings after adding back the owner's pay, and only if a replacement would not cost the same money.
Small shops are priced on discretionary earnings. BizBuySell's sold plumbing businesses averaged 2.49 times, with the middle half between 1.66 and 3.15. Platform buyers price on EBITDA, and the two are never interchangeable.
Multiples rise with recurring revenue, a broad customer base and an owner who is not essential, and fall with the reverse.
Calculators, brokers and advisors give opinions of value. A buyer's price comes from the books.
Clean, consistent books and documented operations come before any valuation.
Where to start with your own shop
Restate your last full year's earnings the way a buyer would, using the earnings section above. That one number tells you more than any calculator will.
Anchorfield's audit is a read of your own records, so you know where a shop loses money before anyone puts a number on it. No audit has been delivered to a home services company yet, so this article makes no claim about what audits find. We have built ERP software for an import business, a more complex operation than a home services company, so reading a business's records end to end is not new to us.
If your books are already clean and you have an advisor you trust, you may not need an audit. If you cannot yet say what the shop earns, ask for a diagnosis before a pitch: a sales pitch is not a diagnosis.
You already know something is wrong.
Ninety seconds will tell you how big it usually is.
