What Is a Good Gross Margin for a Plumbing Company?
A good plumbing gross margin cannot be reduced to one percentage for every contractor. Published benchmarks vary substantially depending on whether a company performs residential service, maintenance, remodeling, commercial work, or new construction. Accounting practices also affect reported gross margin because companies may classify field labor and other direct costs differently.
Available benchmarks illustrate the range.
Level’s 2026 plumbing contractor research places service-call gross margins at 45% to 55%, maintenance agreements at 45% to 60%, residential remodel work at 20% to 28%, and new construction at 12% to 18%. These figures should be treated according to the business model they represent rather than combined into one plumbing-industry average.
BizBuySell provides another reference point based on U.S. plumbing businesses. Its publicly available historical data reports an average gross profit margin of 44.9% in 2020 and 45.0% in 2021. More recent figures on the public report are restricted.
The important lesson is not that every plumbing company should target 45%, 50%, or 60%.
It is that a useful plumbing gross margin benchmark must match the type of company and the accounting method being measured.
A service company completing short residential repair calls has different economics from a contractor bidding large construction projects. A drain and sewer specialist may have a different combination of labor, equipment, materials, and pricing than a company focused on repipes. A business with significant recurring service-agreement revenue can also have a different revenue mix from one dependent primarily on installations.
Gross margin should therefore be evaluated alongside other plumbing business KPIs, rather than treated as a standalone measure of company performance.
Plumbing Gross Margin Benchmarks at a Glance
The following figures provide useful reference points, but they are not directly interchangeable.
| Source or Dataset | Reported Gross Margin | Business or Population | Important Limitation |
| Level | 45%–55% | Plumbing service calls | Service work, not all plumbing revenue |
| Level | 45%–60% | Maintenance agreements | Recurring maintenance work |
| Level | 20%–28% | Residential remodel | Different labor/material economics |
| Level | 12%–18% | New construction | Construction-specific economics |
| BizBuySell | 44.9% | U.S. plumbing businesses, 2020 | Historical company-level data |
| BizBuySell | 45.0% | U.S. plumbing businesses, 2021 | Historical company-level data |
These differences demonstrate why owners should avoid asking only, “What is the average plumbing gross margin?”
A better question is:
“What is the appropriate gross margin benchmark for a plumbing company with my revenue mix, service mix, size, and accounting practices?”
That distinction becomes particularly important for companies with several revenue streams.
Imagine a plumbing contractor generating revenue from residential service calls, water-heater replacements, repiping projects, commercial service agreements, and new construction. The company’s consolidated gross margin represents the combination of those activities. If its revenue mix shifts toward lower-margin construction work during one year, company-wide gross margin could decline even if individual departments continue performing as expected.
The same principle applies to company size. KMF’s analysis of average plumbing company revenue by service trucks addresses the capacity side of a plumbing operation. Gross margin adds another layer: how much of that revenue remains after the direct costs required to produce the work.
Before Comparing Gross Margins, Make Sure You Are Measuring the Same Thing
Gross margin benchmarking becomes unreliable when companies calculate cost of goods sold differently.
This is one of the most important limitations of plumbing industry benchmark data.
Two plumbing companies could have similar revenue, pricing, technician productivity, and operating performance yet report different gross margins because their income statements classify costs differently.
For example, suppose one company records all field technician wages and associated payroll burden as cost of goods sold. Another records technician wages as direct costs but places some payroll-related expenses elsewhere on the income statement.
Their reported gross margins are no longer perfectly comparable.
The problem becomes even larger when comparing a residential service company with a commercial or construction contractor.
Depending on the accounting system and business model, costs associated with vehicles, equipment, commissions, permits, subcontractors, field supervision, and other job-related expenses may appear in different places on the income statement.
For benchmarking to be useful, owners should first determine:
- What revenue is included?
- What technician labor is included in COGS?
- Is payroll burden included?
- Are materials and parts included consistently?
- How are subcontractors classified?
- How are job-specific equipment and rentals treated?
- Are commissions above or below gross profit?
- Are vehicle costs treated consistently?
- Is the benchmark company measuring the same type of work?
This is why KMF’s plumbing benchmark library separates individual operating metrics rather than reducing company performance to one percentage.
How to Calculate Plumbing Gross Margin
The basic formula is straightforward:
Gross Profit = Revenue − Cost of Goods Sold
Then:
Gross Margin = Gross Profit ÷ Revenue × 100
Consider a simplified example.
A plumbing company generates $2,000,000 in annual revenue and records $1,000,000 of direct cost of goods sold.
Its gross profit is:
$2,000,000 − $1,000,000 = $1,000,000
Its gross margin is:
$1,000,000 ÷ $2,000,000 = 50%
That means 50 cents of each revenue dollar remains after the costs classified as directly associated with producing the company’s plumbing work.
That money is not net profit.
Gross profit still has to support the company’s operating overhead, which can include administrative payroll, office expenses, marketing, software, insurance, management costs, rent, professional fees, and other operating expenses.
This distinction matters because a plumbing company can have an apparently strong gross margin while still producing weak bottom-line profitability if overhead is excessive.
Conversely, two companies with similar gross margins can produce different EBITDA margins because one operates with a much heavier overhead structure.
KMF examines that next level of profitability separately in its plumbing EBITDA benchmarks.
What Should Be Included in Plumbing Cost of Goods Sold?
There is no benefit in comparing a 50% gross margin with another company’s 50% gross margin if the two businesses put different expenses above and below the gross-profit line.
For a plumbing contractor, direct job costs may include categories such as:
- Field technician labor
- Employer payroll burden associated with direct labor
- Plumbing materials
- Fixtures and parts
- Subcontractor expenses
- Permits attributable to jobs
- Job-specific equipment or rentals
- Other costs directly required to complete customer work
The exact classification should follow the company’s accounting policies and professional accounting guidance. What matters for benchmarking is consistency.
Technician Labor and Payroll Burden
Field labor can represent one of the most important direct costs in a plumbing company.
An owner evaluating gross margin should understand exactly which labor expenses are included. Technician wages alone do not necessarily represent the full economic cost of field labor. Depending on the company’s accounting treatment, payroll taxes, workers’ compensation, employee benefits, or other labor-related costs may also need to be considered when analyzing job economics.
This becomes particularly important when comparing gross margins across companies.
If one plumbing contractor’s reported gross margin includes a more complete allocation of direct field labor costs than another contractor’s, comparing their headline percentages without adjusting for those differences can lead to the wrong conclusion.
Materials, Parts, and Subcontractors
Plumbing companies can also have very different material profiles.
A service call involving diagnosis and a relatively inexpensive part has a different cost structure from a water-heater installation, whole-house repipe, large commercial project, or new-construction rough-in.
Level’s plumbing research highlights this distinction by reporting lower margins on materials than labor in its contractor analysis. That helps explain why changes in material intensity can alter the blended gross margin of a plumbing company even when pricing discipline and technician performance remain relatively stable.
Subcontracted work creates another comparison issue. A company performing most work with employees can have a different reported cost structure from one that relies heavily on subcontractors.
The goal is not to force every plumbing company into one accounting template.
The goal is to understand what is inside the number before using the number as a benchmark.
That principle becomes even more important when we separate residential service, commercial service, drain and sewer, repipe, remodel, and new-construction plumbing in the next section.
Plumbing Gross Margins by Business Model
A plumbing company’s business model can have as much influence on gross margin as pricing.
This is why comparing a residential service contractor with a new-construction plumbing company can produce misleading conclusions. Both companies may employ licensed plumbers, purchase similar materials, and operate in the same geographic market, yet the way they sell and deliver work can be very different.
Residential service businesses commonly sell directly to homeowners. Their technicians may diagnose problems, present repair options, complete relatively short jobs, and collect payment soon after the work is finished.
Construction-oriented contractors may compete through bids, work from plans and specifications, purchase substantial quantities of material, manage longer projects, coordinate with general contractors, and wait longer for progress payments.
The economics are different enough that gross margin should be benchmarked by business model before it is benchmarked by percentage.
Residential Service and Repair Plumbing
Residential service plumbing is often the category behind the higher gross-margin targets found in plumbing-industry discussions.
Level’s published plumbing benchmark research places service-call gross margins at approximately 45% to 55%. ServiceTitan has published guidance discussing a higher target of roughly 60% to 62% gross profit margin across services.
These figures should not be treated as interchangeable.
One is presented as an industry benchmark range, while the other is closer to an operating target. Differences in accounting definitions, company populations, pricing models, and which costs are included in COGS can materially affect the reported percentage.
Still, there are structural reasons service plumbing can support higher gross margins than some project-based work.
A residential service customer is generally purchasing more than a physical part. The customer is also paying for technician availability, diagnosis, dispatch, stocked vehicles, training, convenience, warranty support, and the ability to solve a problem at a specific location.
That allows pricing to reflect the value of the completed service rather than simply applying a small markup to labor and materials.
It also makes technician performance especially important.
A company can generate significant revenue but still struggle with gross margin if technicians require excessive time to complete jobs, produce callbacks, use materials inefficiently, or fail to convert available working hours into productive customer work.
That relationship is why technician productivity deserves to be measured separately within a plumbing company’s plumbing business KPIs.
Commercial Plumbing Service
Commercial service should also be distinguished from commercial construction.
A contractor providing repair and maintenance services directly to building owners, property managers, facilities departments, restaurants, hotels, medical facilities, or other commercial customers may operate more like a service business than a traditional construction contractor.
However, commercial accounts can introduce different economics.
Individual jobs may be larger. Customer relationships can produce repeat work. Billing terms may be longer. Pricing may be negotiated differently. Some customers may require specific insurance coverage, documentation, vendor compliance, or scheduled service.
Customer concentration can also become more important.
A residential service company may complete thousands of jobs for unrelated homeowners. A commercial contractor could generate a meaningful percentage of annual revenue from a much smaller number of accounts.
For gross-margin benchmarking, the important distinction is therefore not simply residential versus commercial.
Owners should ask:
Is the company primarily providing service directly to end customers, or is it performing competitively bid project work?
That distinction can explain more about the economics than the residential/commercial label alone.
Sewer, Drain, Repipe, and Remodel Work
Specialty plumbing work creates another benchmarking challenge.
Drain cleaning, sewer replacement, repiping, water-heater replacement, fixture installation, and remodeling may all appear under the same company’s plumbing revenue. Yet each category can have a different combination of labor, equipment, material costs, ticket size, and job duration.
Drain and sewer work, for example, may depend heavily on specialized equipment and technician skill while using a different material mix from a whole-house repipe.
Repiping can produce much larger individual tickets but can also require substantial labor and material inputs.
Remodel plumbing may involve scheduling around other trades and working within a larger construction project rather than completing a short service call.
This is one reason company-wide gross margin should be analyzed alongside gross margin by department or service line whenever reliable accounting data is available.
A blended company margin can hide important changes underneath it.
For example, imagine a contractor with two divisions:
- Service and repair
- Remodel and project work
The service division’s gross margin could remain stable while the company wins several large remodeling projects. If those projects carry lower gross margins than service calls, the company’s consolidated gross margin could decline even though neither department became less efficient.
That is a revenue-mix change, not necessarily an operating failure.
Recurring maintenance revenue introduces another dimension. KMF’s discussion of plumbing service agreements explains why the quality and structure of recurring customer relationships should be evaluated separately rather than assuming all plumbing revenue has the same economic characteristics.
New Construction Plumbing
New construction provides perhaps the clearest example of why a universal plumbing gross-margin benchmark does not work.
Level’s published plumbing benchmark ranges place new-construction gross margin at approximately 12% to 18%, substantially below its reported service-call range of 45% to 55%.
That does not automatically mean a construction contractor is poorly managed.
The underlying business model is different.
New-construction plumbing can involve competitive bidding, detailed scopes of work, substantial material purchases, scheduled labor over extended periods, coordination with general contractors and other trades, change orders, project management, retainage, and working-capital demands.
Large contracts can generate substantial revenue while operating at lower gross-margin percentages than individual residential service calls.
This distinction is critical when evaluating company size.
A $10 million plumbing contractor focused heavily on new construction should not automatically be expected to produce the same gross-margin percentage as a $3 million residential service company.
Revenue alone does not reveal the economics underneath the business.
The same caution applies when reviewing KMF’s average plumbing company revenue by service trucks. Truck count can help owners think about service capacity and revenue production, but it should not be used as a substitute for understanding service mix, technician productivity, or gross profit.
Why Service Plumbing and New Construction Should Not Use the Same Benchmark
Consider two hypothetical plumbing companies that each generate $5 million in annual revenue.
Company A performs residential service and repair.
Company B primarily performs new construction.
If Company A produces a 50% gross margin, it generates:
$5,000,000 × 50% = $2,500,000 gross profit
If Company B produces an 18% gross margin, it generates:
$5,000,000 × 18% = $900,000 gross profit
The difference is substantial, but the percentages alone still do not tell us whether either business is financially healthy.
We would need to understand the overhead required to operate each company.
The service company may support dispatchers, customer-service representatives, extensive marketing, service software, training programs, stocked trucks, management personnel, and other infrastructure.
The construction company may have a different office structure and operating model.
This leads to an important benchmarking principle:
Gross margin measures what remains after direct costs. It does not measure what remains after the entire company is operated.
That is why gross margin must eventually be connected with operating expenses, EBITDA, and cash flow.
What Public Mechanical Contractors Tell Us About Gross Margin
Public mechanical contractors can provide useful financial context because their financial statements disclose revenue, cost of sales, gross profit, and other operating information.
However, they should not be treated as direct benchmarks for a privately owned residential plumbing company.
Comfort Systems USA illustrates this distinction.
The company operates at a scale and level of diversification far beyond a typical privately held plumbing contractor. Its operations include mechanical and electrical contracting across multiple markets.
For 2025, Comfort Systems USA reported a consolidated gross margin of 24.1%, compared with 21.0% in 2024.
That percentage would be inappropriate as a direct target for a residential plumbing service business. Its value is contextual: it demonstrates how the economics of large-scale mechanical contracting can differ from the higher gross-margin percentages frequently discussed for residential service work.
Limbach provides an even more useful illustration of the effect of business model.
The company separates its operations into Owner Direct Relationships (ODR) and General Contractor Relationships (GCR).
ODR includes direct relationships with building owners and incorporates service and maintenance work. GCR is more closely associated with relationships involving general contractors and project-based work.
Historically, Limbach has reported materially different gross margins between those two business models.
For 2024, the company reported an ODR gross margin of 31.2%, compared with 21.1% for GCR. Earlier filings also showed ODR margins above GCR margins.
This does not establish a residential plumbing benchmark.
Limbach operates in commercial and institutional mechanical, electrical, plumbing, and control systems. Its customer base, project sizes, cost structure, and operating model differ from those of a local residential plumbing contractor.
What it does provide is evidence for the broader principle:
Revenue mix and customer relationship model can materially influence gross margin even inside the same company.
That principle is highly relevant to privately owned plumbing businesses that combine service, maintenance, replacement, commercial, and construction revenue.
Plumbing Gross Margin vs. Markup
Gross margin and markup are related, but they are not the same calculation.
Confusing them can lead to serious pricing errors.
Suppose a plumbing job has a direct cost of $500.
If the contractor adds a 50% markup, the selling price becomes:
$500 + ($500 × 50%) = $750
The gross profit is $250.
But the gross margin is:
$250 ÷ $750 = 33.3%
A 50% markup therefore does not create a 50% gross margin.
To produce a 50% gross margin on a job costing $500, the selling price would need to be $1,000:
$1,000 − $500 = $500 gross profit
$500 ÷ $1,000 = 50% gross margin
This distinction matters because pricing decisions based on markup alone can produce a lower gross margin than the owner expects.
Gross Margin vs. Net Profit Margin
Gross margin tells an owner how much revenue remains after the costs classified as directly associated with producing the work.
Net profit looks much farther down the income statement.
Between gross profit and net profit are operating expenses such as management payroll, office staff, advertising, software, rent, professional services, insurance, and other overhead.
A plumbing business could therefore produce a healthy gross margin but still have weak net profitability.
For a broader discussion of those economics, see KMF’s guide to plumbing business profitability.
This is also why gross margin should not be confused with how much money the owner personally earns. Owner compensation, distributions, discretionary expenses, debt obligations, taxes, and other factors can make owner economics different from the company’s gross-margin percentage.
Plumbing Gross Margin vs. EBITDA Margin
EBITDA moves the analysis closer to the operating earnings of the entire company.
The simplified relationship looks like this:
Revenue
↓
Direct Costs / COGS
↓
Gross Profit
↓
Operating Overhead
↓
Operating Earnings / EBITDA considerations
A change in gross margin can therefore have a significant effect farther down the income statement.
Consider a $5 million plumbing company.
If gross margin improves from 45% to 47%, gross profit increases from:
$2.25 million to $2.35 million
That is an additional $100,000 of gross profit, assuming revenue remains constant.
It does not automatically mean EBITDA increases by exactly $100,000. Other expenses can change at the same time.
But the example demonstrates why small changes in gross-margin percentage can become financially significant as revenue grows.
Owners who want to examine the next layer of financial performance can compare this metric with KMF’s plumbing EBITDA benchmarks.
Gross margin answers:
How much revenue remains after direct costs?
EBITDA analysis moves toward:
How much operating earnings does the company produce after the broader cost structure required to run the business?
Understanding both is far more useful than relying on either percentage by itself.
What Causes Plumbing Gross Margin to Increase or Decrease?
A plumbing company’s gross margin can move even when revenue is growing.
That is why owners should avoid looking at revenue alone when evaluating financial performance. A company can add trucks, technicians, and customers while producing less gross profit from each dollar of sales.
Several operating factors can influence gross margin.
Pricing and Average Ticket
Pricing directly affects gross margin because revenue is one side of the gross-margin equation.
Suppose a service call has $300 of properly classified direct costs.
At a $600 selling price, gross profit is $300 and gross margin is 50%.
At a $650 selling price, with the same $300 of direct costs, gross profit becomes $350 and gross margin increases to approximately 53.8%.
However, raising prices is not the only way to improve gross margin.
Average ticket can change because of the types of jobs technicians perform, the repair options customers select, equipment or fixtures sold, geographic market, and the company’s overall service mix.
Owners should therefore analyze pricing together with job type and direct costs rather than assuming a higher average ticket automatically means a better gross margin.
Technician Productivity
Technician productivity is one of the most important operating metrics behind service-company economics.
A plumbing company pays for technician time, but not every paid hour necessarily produces billable customer work.
Technicians may spend time driving, sourcing parts, completing paperwork, attending meetings, returning to previous jobs, or waiting for the next assignment.
Some of these activities are unavoidable.
The question is whether the company consistently converts its available field capacity into completed work and gross profit.
This is why revenue per technician alone does not provide the complete answer.
A technician could generate substantial revenue while consuming excessive labor hours or materials. Another technician could produce similar revenue with fewer callbacks, stronger job execution, and better direct-cost control.
For gross-margin analysis, owners eventually need to connect:
Revenue per technician → direct cost per technician → gross profit per technician
That is more informative than looking at sales production alone.
Technician Utilization
Utilization examines how effectively available technician capacity is used.
A plumbing company can have strong demand and still lose productive capacity through poor scheduling, excessive drive time, weak dispatching, parts delays, or gaps between calls.
This becomes especially important as the company adds trucks.
Adding another service vehicle does not automatically create profitable revenue. The company also needs enough qualified labor, customer demand, dispatch capacity, and operating efficiency to use that truck productively.
This is why KMF’s analysis of average plumbing company revenue by service trucks should be considered together with technician productivity and gross margin.
Revenue measures production.
Gross margin measures how much of that revenue remains after direct costs.
Labor Costs
Labor costs can reduce gross margin if compensation increases faster than the revenue and gross profit generated by field employees.
However, owners should not interpret this as an argument for simply reducing technician compensation.
Qualified plumbers are skilled workers, and compensation is only one side of labor economics.
A higher-paid technician who completes more profitable work, minimizes callbacks, uses time efficiently, and generates more gross profit can be economically stronger than a lower-paid technician with weaker productivity.
The better question is:
How much gross profit does the company generate relative to its direct field labor investment?
That creates a more useful connection between compensation, productivity, and profitability.
Material Costs
Material inflation and changes in job mix can also affect gross margin.
A company performing more material-intensive projects may report a lower blended gross margin even if its operations remain disciplined.
For example, a shift from repair calls toward water-heater replacements, repipes, remodeling, or construction work can change the percentage of revenue consumed by materials.
Owners should therefore examine material cost as a percentage of revenue by service line where practical.
A sudden increase may indicate price changes, purchasing problems, waste, incorrect job costing, or simply a shift toward more material-intensive work.
The financial statements alone do not explain which cause applies.
Callbacks, Warranty Work, and Rework
Callbacks can quietly damage gross margin.
A technician may complete a job and generate revenue during the first visit. If another technician must return without generating additional revenue, the company incurs more labor, vehicle, and possibly material costs against the same original sale.
The original job can therefore appear successful from a revenue perspective while producing weaker economics after the callback is considered.
This is one reason operational quality and financial performance should not be separated.
Callback rate, technician productivity, average ticket, booking rate, and gross margin are different metrics, but they can influence one another.
Service Mix and Revenue Mix
Revenue mix can change company-wide gross margin even when individual departments remain stable.
Consider a plumbing company that historically generates:
- 70% of revenue from residential service
- 20% from replacement projects
- 10% from construction
If construction expands to 30% of company revenue the following year, the blended gross margin may decline because a larger portion of sales now comes from a lower-margin business model.
That does not necessarily mean the company deteriorated.
It means the owner needs to understand why the percentage changed.
This is the central lesson of plumbing gross-margin benchmarking:
Benchmark the business model before benchmarking the percentage.
How Plumbing Owners Should Benchmark Their Gross Margin
A useful benchmark should allow an owner to compare similar economics.
Before deciding whether a plumbing company’s gross margin is strong or weak, KMF recommends organizing the comparison around the following questions.
- What Business Model Produces the Revenue?
Separate service, maintenance, replacement, remodeling, commercial project work, and new construction when reliable financial information permits.
Do not assume two plumbing contractors should produce similar margins simply because they operate in the same industry.
- Who Is the Customer?
Understand whether revenue comes primarily from homeowners, commercial building owners, property managers, general contractors, developers, or other customers.
The customer relationship can affect pricing, job duration, payment terms, competition, and project economics.
- What Is Included in COGS?
Confirm how technician labor, payroll burden, materials, subcontractors, commissions, vehicles, equipment, and other direct expenses are classified.
A benchmark becomes less meaningful when accounting classifications are inconsistent.
- Is the Measurement Period Long Enough?
One month can produce misleading results.
Large jobs, seasonality, unusual material purchases, payroll timing, and other events can distort short periods.
Trailing-12-month results can provide a more stable view, while monthly reporting remains useful for identifying trends.
- Has the Revenue Mix Changed?
Compare service-line percentages between periods.
A change in blended gross margin may reflect a change in what the company sells rather than a change in operational performance.
- What Is Happening to Gross Profit Dollars?
Percentages matter, but dollars matter too.
A growing company could experience a modest decline in gross-margin percentage while still producing substantially more gross profit dollars.
Conversely, a stable percentage on declining revenue could mean fewer gross-profit dollars are available to support overhead.
Owners should monitor both.
- What Happens Below Gross Profit?
Gross margin is not the final measure of profitability.
A company still needs enough gross profit to pay its operating overhead and produce acceptable earnings.
That is why gross-margin analysis should eventually connect with plumbing EBITDA benchmarks and the broader set of plumbing business KPIs.
How Gross Margin Relates to Plumbing Company Value
Gross margin can matter when evaluating a plumbing company, but gross margin by itself does not determine business value.
A buyer is ultimately interested in the company’s ability to generate sustainable earnings and cash flow.
Gross margin helps explain how those earnings are created.
A company with strong gross profit but excessive overhead may produce disappointing EBITDA. Another company might operate with a lower gross-margin percentage but maintain an efficient cost structure that produces attractive operating earnings.
Buyers may also evaluate factors beyond current profitability, including customer concentration, recurring revenue, management depth, owner dependence, technician workforce, service mix, growth, capital requirements, and the quality of financial records.
Recurring customer relationships can be particularly relevant for service businesses. KMF discusses this issue separately in its analysis of plumbing service agreements.
For an owner considering an eventual transaction, the useful financial chain is:
Revenue → Gross Profit → Operating Expenses → EBITDA or Adjusted EBITDA → Business Valuation
Gross margin belongs near the beginning of that chain.
It helps explain the economics of the work being performed, while EBITDA and other cash-flow measures move closer to the earnings a buyer may analyze when determining value.
Owners considering an eventual exit can also review KMF’s guide on how to sell a plumbing business in Florida for the broader transaction process.
Frequently Asked Questions About Plumbing Gross Margins
What is a good gross margin for a plumbing company?
There is no single gross-margin percentage that applies to every plumbing company. Published figures vary by business model and methodology. Level’s plumbing research, for example, reports a 45%–55% range for service calls while reporting substantially lower ranges for residential remodeling and new construction.
The most useful benchmark is one that matches the company’s service mix and cost classification.
What is the average gross profit margin for a plumbing business?
BizBuySell’s publicly available historical plumbing-business data reported average gross profit margins of 44.9% in 2020 and 45.0% in 2021. Those figures are historical company-level references and should not be assumed to represent every current plumbing company or service line.
A company-specific comparison should account for service mix, geography, size, and accounting practices.
Why do service plumbing companies have different margins from new construction companies?
Service plumbing and new construction have different pricing and operating models.
Service businesses frequently sell directly to end customers and perform shorter jobs. New-construction contractors may compete through bidding, purchase significant materials, manage longer projects, coordinate with general contractors, and operate under different payment and working-capital conditions.
Comparing the two using one gross-margin target can therefore be misleading.
Is gross margin the same as markup?
No.
Markup measures profit relative to cost, while gross margin measures gross profit relative to selling price.
If a job costs $500 and receives a 50% markup, its selling price is $750. Gross profit is $250, resulting in a gross margin of approximately 33.3% rather than 50%.
Should technician wages be included in plumbing COGS?
Direct field labor is commonly relevant to calculating the cost of delivering plumbing work, but exact financial-statement classifications can vary.
For benchmarking purposes, the important issue is consistency. Owners should know which labor and payroll-related costs are included in their own calculation before comparing their gross margin with an external benchmark.
Accounting classifications should be reviewed with the company’s accountant or financial professional when necessary.
Can a plumbing company have a high gross margin but low profit?
Yes.
Gross margin measures what remains after direct costs. The company still has to pay operating overhead.
High administrative payroll, marketing costs, rent, insurance, software, management expenses, or other overhead can reduce operating and net profitability even when gross margin appears strong.
Does a higher gross margin make a plumbing company more valuable?
Not automatically.
Gross margin can help explain the quality and economics of revenue, but business value depends on broader factors. Buyers may consider EBITDA or adjusted cash flow, growth, recurring revenue, customer concentration, management, owner dependence, workforce stability, capital requirements, and other risks.
A higher gross margin is therefore one financial characteristic rather than a valuation formula.
Should plumbing companies benchmark gross margin monthly or annually?
Both can be useful for different purposes.
Monthly reporting can identify changes quickly, while trailing-12-month analysis can reduce distortions caused by seasonality, project timing, unusual purchases, or short-term fluctuations.
Owners should use a consistent accounting method across periods.
How can a plumbing company improve gross margin?
Potential areas to investigate include pricing, technician productivity, utilization, material purchasing, job costing, service mix, callbacks, warranty work, and direct labor efficiency.
The correct response depends on the cause of the margin problem. Owners should diagnose the underlying driver before assuming that raising prices or cutting expenses is the solution.
Conclusion
Plumbing gross margin benchmarks are most useful when similar companies and similar accounting definitions are being compared.
Published data demonstrates why one universal percentage can be misleading. Service calls, maintenance work, remodeling, commercial projects, and new construction can operate with very different economics. Accounting treatment of technician labor and other direct costs can create additional differences between reported percentages.
Start by understanding the company’s business model and defining COGS consistently.
Then examine gross margin alongside revenue, gross-profit dollars, technician productivity, service mix, overhead, and plumbing EBITDA benchmarks.
The objective is not simply to reach an industry percentage.
It is to understand how efficiently the plumbing company converts revenue into gross profit and how that gross profit ultimately supports sustainable operating earnings.