Plumbing Contractor Profit Margins (2026): 12-22% Net, 45-55% Service Gross
The short answer
Level's operator planning ranges are 45-55% gross margin for service calls, 45-60% for maintenance agreements, 20-28% for remodels and 12-18% for construction, with a 12-22% net-profit scenario. These are not a measured plumbing distribution. Cross-trade CFMA net profit before tax is a different reference: 6.3% median and about 11.9% top quartile. Check work mix, cost completeness and accounting basis before comparing.
Key takeaways
- Two earlier plumbing operator examples had 2- and 4-day median durations and 0.3% and 0.4% of jobs over 90 days. They are case examples, not a measured plumbing percentile or a trade ranking.
- Cross-trade quoted line-item margin medians are 31.5% for materials and 47.7% for labor. Quoted figures do not establish realized plumbing job margins.
- A hypothetical seven-day reduction in eligible collection timing on $4M annual credit sales is about $76,712 of one-time working-capital release. Shorter job duration alone does not establish that collection timing changes.
- Residential remodels are the margin trap: a tight 20 to 28% gross margin that one unscoped change order can wipe out.
Short-Cycle Plumbing Work: What to Test
Short-cycle service work can make the handoff from completion to invoice easier to inspect. That is an operating mechanism to test, not evidence that the plumbing trade has the cleanest margins or backlogs.
Two plumbing-company examples retained from the earlier operator analysis ran 2 days / 0.3% and 4 days / 0.4% for median duration / jobs past 90 days. Their source detail is not reproduced in the current downloadable cross-trade metrics, and they do not establish a plumbing-versus-HVAC cohort comparison.
Test each handoff separately: completion, final invoice, payment application and financial closeout. Short duration does not prove complete costs, faster collections or a causal margin improvement.
My background includes private equity, building financial tooling for commercial contractors, and the Level research across 2,200+ contractors. Use actual job-cost and cash evidence to assess the specific business; the research does not establish a plumbing ranking.
Margin Benchmarks by Service Type
The following ranges are Level operator planning inputs, not sourced trade-specific distributions.
| Service Type | Gross Margin Planning Range | Plumbing Planning Input | Check |
|---|---|---|---|
| Service calls / repairs | 35-55% | 45-55% | Billing speed, parts markup, first-call fix rate |
| Maintenance agreements | 40-65% | 45-60% | Planning target, not an observed median. Cross-trade measured SA median is 37.9%. Backflow testing, drain maintenance, SA pricing |
| Residential remodels | 18-30% | 20-28% | Scope control, fixture sourcing, permitting delays |
| New construction / commercial | 10-20% | 12-18% | Sub management, change orders, retainage |
For a short plumbing service call, diagnosis, repair and invoicing may occur on the same day. Where your records support that sequence, it shortens the completion-to-invoice handoff. Verify the actual invoice date, contract terms and payment receipt; this is not a measured advantage over HVAC or electrical.
Compare your margins to the plumbing benchmark → Open the Margin Calculator, pick Plumbing, plug in your revenue and gross margin, and see your gap vs. directional Plumbing bands of 36% median and 46% top-quartile. These are company-level directional observations, not a measured plumbing distribution. The 45-55% service-call range is a line-level planning input; it is not the company-wide margin. Confirm the calculator's current source/method before using it.
The Full Benchmark Picture
These are cross-trade Level Index references with metric-specific samples, not a plumbing-only table.
| Metric | P25 | Median | P75 | Scope |
|---|---|---|---|---|
| SA gross margin | 20.5% | 37.9% | 53.5% | Cross-trade, n=259 companies with at least $10K SA revenue |
| Collection rate | 70.7% | 85.1% | 92.7% | Cross-trade n=464; cash collected / billed revenue, unpublished comparison window, not point-in-time AR |
| Rate-card field | $55/hr | $79/hr | $116/hr | Cross-trade n=1,770; mixes customer billing, loaded cost and wages, not a plumbing selling-price distribution |
| Quote conversion | 61% | 73.9% | 83.2% | Decided quotes only, n=794; won / (won + lost), excluding pending |
| Billing speed | Not published | 1 day including progress billing; 7 days for post-completion invoicers | Not published | n=733, work complete to invoice, not financial closeout |
Based on Level's proprietary contractor research and finance work across 2,200+ contractors. The cross-trade Index rows have their own metric-specific samples. Plumbing work-type ranges, fast-closeout examples, markup bands, and net-margin ranges are Level operating observations designed to help owners diagnose mix, pricing, and job-costing decisions.
Why Plumbing Margins Are Deceptive
A short job cycle does not establish margin. Check two possible gaps beneath the aggregate:
1. Material Markup: Test Against Supplier Cost
Pipe, fittings, fixtures, water heaters and valves can make materials a substantial share of plumbing COGS. Confirm the mix in your own job-cost records; no measured HVAC comparison is established here. The cross-trade Level Index reports quoted line-item margin medians of 31.5% for materials and 47.7% for labor, across 2.2M+ quote line items. These are quoted observations, not realized plumbing margins.
For illustration only, applying those medians to assumed revenue weights of 60% materials / 40% labor gives 0.60 × 31.5% + 0.40 × 47.7% = 37.98%. A 30% materials / 70% labor assumption gives 42.84%. These invented mixes do not measure either trade or establish the effect of changing work mix. The labor vs. materials split is a useful lens for plumbing job costing; test it against your own records.
The lever: Test the markup against actual supplier cost, accepted prices and customer response. In a fictional $4M shop, assume $1.2M annual material cost and $300K of that cost eligible for repricing. Cost-plus-30% sells that subset for $390K; cost-plus-50% sells it for $450K. If volume and all other costs stay unchanged, the difference is $60K of gross profit before tax. Markup on cost is not margin: 30% markup gives 23.08% gross margin; 50% gives 33.33%. If the original company gross profit was $1.2M, the new $1.26M / $4.06M is 31.03%, about one percentage point above 30%. These are planning assumptions, not evidence that customers will accept the new price.
2. Residential Remodels Are Margin Traps
Bathroom and kitchen remodels are the plumbing equivalent of HVAC install work: lower margin, longer duration, higher scope-creep risk. The gross margin range (20-28%) is tight, and uncontrolled scope changes can push a profitable remodel into breakeven territory.
The contractors who do remodels profitably treat them like commercial projects: defined scope, written change order process, milestone billing, and a post-job cost review. The ones who lose money treat them like big service calls: informal scope, T&M billing, and no budget tracking.
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Short-Cycle Work and Billing Speed
Short-cycle work can simplify billing, but completion duration and collection timing need different records. The two historical examples below are not a trade-wide distribution:
| Metric | Retained Operator Examples | Current Comparison | Decision Limit |
|---|---|---|---|
| Median job duration | 2 and 4 days | No reproduced plumbing cohort median | Does not establish receivable timing |
| Jobs >90 days | 0.3% and 0.4% | No reproduced plumbing cohort percentile | Review each stale job, including legitimate long work |
| Billing speed | Inspect actual work-complete and invoice dates | Cross-trade median 1 day including progress billing; 7 days among post-completion invoicers, n=733 | Faster invoicing does not establish payment receipt |
A separate fictional cash scenario assumes $4M annual credit sales and an actual seven-day reduction in collection timing: ($4M / 365) × 7 = $76,712 of one-time working-capital release. It is not recurring profit. Neither job volume nor shorter duration, without invoice-aging and receipt evidence, proves that collection improvement.
Verify actual invoice aging, receipts, retainage and cutoff before relying on that cash scenario. Customer terms and disputes can remain unchanged even when field work finishes sooner.
What Healthy Plumbing Financials Look Like
For a fictional $4M service-heavy contractor, the following are Level planning bands, not measured plumbing percentiles. They are independent inputs, not a single P&L whose endpoints can all be combined:
| Line Item | Healthy Range | Notes |
|---|---|---|
| Revenue | $4M | |
| COGS | 48-58% | Materials share varies by work mix; verify the actual job-cost basis |
| Gross profit | 42-52% | 48%+ is a planning case to test against your mix |
| Overhead | 20-28% | Planning band for $3-10M revenue; compare the same cost classification |
| Net profit | 12-22% | Planning scenarios, not observed plumbing percentiles |
| Owner comp | 10-15% of revenue | Highly variable by role |
The 12-22% net-profit band is an operator planning scenario, not a trade ranking. For a differently scoped external reference, CFMA all-contractor net profit before tax is 6.3% median and about 11.9% top quartile. Compare owner compensation, interest, tax and cost classification before using either figure.
If your net margin is under 10%, possible causes to test include: underpriced maintenance contracts, remodel work without job costing, or collections problems on commercial work.
Growth Levers for Plumbing Contractors
1. Service Agreements on Backflow and Drain Maintenance
Consider whether recurring drain maintenance, backflow testing (subject to the actual local requirement, inspection rules and qualified service scope), and water heater maintenance fit an agreement with defined scope and eligibility.
A plumbing SA portfolio provides the same benefits as HVAC SAs: recurring revenue, predictable scheduling, and pull-through repair opportunities. The median pull-through rate across contractors is 8.7%. In a fictional scenario, $200K of eligible SA revenue at an assumed 30% pull-through corresponds to $60K of repair revenue over the same period, from customers who already trust them.
2. Commercial Tenant Improvement Work
Commercial TI (tenant improvement) plumbing is higher-ticket and repeatable: restaurant rough-ins, office bathroom buildouts, retail plumbing relocations. The margins are tighter (12-18%), but the volume and average ticket size can scale revenue without proportional overhead increases.
The catch: TI work requires progress billing, WIP management, and the financial discipline of a commercial contractor. Plumbing shops that jump into TI work without these controls often discover their cash flow can't support the longer payment cycles.
3. Water Treatment and Specialty Services
For water softeners, filtration systems, tankless water heaters and gas line work, test a 40% gross-margin planning scenario against actual materials, labor, warranty and overhead classification. It is not a verified specialty-work margin distribution. Flat-rate pricing can simplify billing, but protects margin only when the supported cost and scope fit the price.
The Bottom Line
A plumbing operator can inspect duration, backlog and billing together without assuming the trade is better than another. The margin opportunity isn't about working harder, it's about pricing materials correctly, building an SA portfolio, and applying financial discipline to remodel and commercial work.
To investigate a fictional 12% versus 20% net-margin scenario, inspect three candidate differences: material markup, SA pull-through, and whether remodel/TI work is running with job costing or running blind.
For the demand side, see how plumbing scores on the Trade Economy Index: where the trade sits on AI-resilience and AI-leverage.
Source and claim note
Level's plumbing ranges are operator planning inputs informed by finance work, not a measured plumbing distribution. The retained closeout examples do not establish a trade comparison. Measured cross-trade Level Index values, samples, and definitions are available in the downloadable contractor benchmark data. External wage context comes from the Bureau of Labor Statistics, and public-company context should be read from issuer SEC filings. Level's plumbing team applies these numbers to job-costing, pricing, and cash decisions.
Q: How does Level work with plumbing contractors? A: Where the installed systems provide supported records or exports, we first verify account identity, service-type mapping and cost coverage. We build a source-linked recorded-cost view by service type, flag incomplete costs as unknown, and have a person review the result before attributing a margin gap. For plumbing contractors, we typically focus on material markup optimization, SA portfolio buildout, and job costing on remodel work. The first audit is free.
Q: Should plumbing contractors avoid commercial work? A: No, but commercial plumbing requires different financial management than service work. Retainage, progress billing, longer AR cycles, and sub management all need dedicated processes. If you're doing commercial plumbing without a WIP schedule and monthly job-cost reviews, you're taking on commercial-grade risk with residential-grade controls.
Q: What's the fastest way to improve plumbing margins? A: Audit your material markup. If you have not reviewed your markup matrix against current supplier invoices recently, start there. Review the top material categories against current supplier invoices and actual accepted selling prices. The fictional example above adds $60K and about one margin point only under unchanged-volume/cost assumptions. The actual result, effort and customer response need evidence; no fixed improvement is promised.
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About the author
Sam Yang
Founder & CEO
Founder of Level, the always-on finance team for contractors, service businesses, and ecommerce brands. Ex-CFO across trades, SaaS, and service businesses. 4 years as Director of Growth Product at BuildOps, building financial tooling used by 1,000+ commercial contractors. Four years in PE and investment banking rolling up and acquiring service businesses, $2.5B in total transactions including M&A and IPOs. Stanford MBA, Brown undergrad. The Level founding team's analysis of 2,200+ contractors ($13.25B in job revenue) across operating, private-equity, and CFO roles anchors the Level Index benchmark research.
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