Can three plumbing jobs a day cover one service van?
Test three plumbing jobs a day against a paid owner and helper, net invoice mix, parts, travel, callbacks and the capacity limit of one residential service van.
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Three completed plumbing jobs a day cover the defined operating costs in this worked case, provided the route retains a $410 average invoice and the selected work fits its paid week. The monthly sensitivity produces about $26,630 of sales and $4,972 of operating surplus after job-linked costs, paid owner/helper labor and recurring overhead. The mathematical threshold is about 2.25 completed jobs per field day.
The field clock is a separate test. The selected mix uses about 8.18 elapsed route hours for three jobs, then needs administration outside that day. A lower invoice, more callbacks or a wider territory can make a numerically attractive target impossible to deliver. These figures are authored planning assumptions, not observed local demand, a national average or a promise of profit.
The StartFigures Plumbing Business case is one used service van with a licensed working owner and a supervised paid helper. It offers ordinary residential repairs, fixture replacement and limited drain diagnosis within verified local authority. It excludes new-construction crews, whole-house repiping, sewer excavation or entry, root removal, gas work, commercial systems and guaranteed round-the-clock cover.
Close one job before counting another
The sale unit is one completed and collected outcome. It may be a diagnostic-only visit, an approved repair, an ordinary supplied-fixture installation or a limited drain job. An inquiry, quote, booking or failed-access visit does not earn the modeled invoice.
Keep related trips inside that job. If a diagnostic charge is credited against an accepted repair, the final invoice is the retained sale; adding both the diagnostic fee and full repair invoice would overstate revenue. A callback can use another morning without creating another legitimate sale. Record its time, replacement parts and any credit against the original job.
Net sales here exclude customer-collected sales tax and reflect discounts or refunds. Parts and labor are both included in the selected all-in invoice categories, so the parts expense has to appear on the cost side as well. Customer-supplied fixtures require a different price and parts assumption.
Build the invoice from an actual offer
The worked $410 invoice comes from four mutually exclusive outcome categories. Every price, mix and duration in this table is an authored assumption to replace with local paid records.
| Primary outcome | Share of completed jobs | Net invoice | Hands-on hours |
|---|---|---|---|
| Diagnostic-only outcome | 20% | $125 | 0.75 |
| Ordinary repair | 35% | $350 | 1.50 |
| Supplied ordinary fixture replacement | 30% | $600 | 2.50 |
| Limited drain diagnosis or clearing | 15% | $550 | 2.00 |
| Weighted completed job | 100% | $410 | 1.725 |
The price check uses actual U.S. provider menus without averaging unlike offers. Morgan Plumbing in Oklahoma City lists customer-supplied faucet installation at $165, a main-line cleaning under stated access conditions at $195 and supplied toilet options at $590 or $790. All Purpose Plumbing in the Tacoma area lists camera inspection at $409 and toilet repairs at $280–$595. Those menus describe their own scope and conditions; they do not verify the table's invoice, service duration or willingness to pay in another territory. Morgan Plumbing pricing, All Purpose Plumbing pricing.
Compare complete scope before using a quote. A camera inspection, ordinary accessible blockage, supplied toilet, customer-supplied toilet and an emergency call are different products. The $550 drain outcome is a selected diagnosis/clearing mix; it is not presented as the cost of a basic drain snake everywhere.
Equipment also limits the promise. RIDGID describes the K-400 for selected drain-line sizes and specifically excludes root blockages. A limited machine allowance does not equip this van for every sewer job. RIDGID K-400.
Let contribution pay the fixed team
The scenario assigns 25% of net sales to job-linked costs: 19% parts and consumables, 3% payments, 2% route fuel and 1% other rework. That leaves 75% contribution before the fixed labor and overhead base. These are assumptions, with no claim that they are trade averages.
The payment allowance needs its own check. Stripe lists 2.9% plus $0.30 for successful domestic online-card transactions under its standard U.S. pricing. A $410 charge would cost $12.19 under that rate, while 3% of the invoice is $12.30. Other payment methods, invoicing products, manually entered cards, refunds and account terms can change the result. The allowance does not establish that this operator has a processor account. Stripe pricing.
Mature fixed costs are $15,000 per month: $135,000 annual paid labor and employer/coverage allowances plus $45,000 annual overhead, divided by twelve. Payroll includes $80,000 of annual owner economic labor, $39,000 helper pay (thirty paid hours × fifty-two paid weeks × $25 per hour) and $16,000 for employer costs and coverage. The owner's legal wage and tax treatment depends on the entity; the economic labor allowance stays in the decision either way.
The $45,000 overhead assumption covers insurance, fixed van/tool costs, storage, communications, software, marketing, accounting and training. Replace it with actual terms. Job-linked fuel is already in contribution and must not be deducted again.
At the base inputs:
- Break-even monthly revenue: $15,000 ÷ 75% = $20,000.
- Completed jobs per month at break-even: $20,000 ÷ $410 = 48.78.
- Completed jobs per field day: 48.78 ÷ 5 ÷ 4.33 = 2.25 on average.
- Three-job monthly revenue: 3 × $410 × 5 × 4.33 = $26,629.50.
- Three-job monthly contribution: $26,629.50 × 75% = $19,972.13, rounded.
- Simplified monthly operating surplus: $19,972.13 − $15,000 = $4,972.13, rounded.
The practical whole-job calculator target is three. A monthly average can combine two-job and three-job days; it does not require the same integer every day. At two completed jobs per day, the same mature fixed base loses $1,685.25 per month.
Test the target against the route clock
The table's weighted hands-on time is 1.725 hours per job. Add an authored 45 minutes for travel, access and pack-up, plus 15 minutes per completed job for expected callback work. The latter is a capacity allowance; it does not assume every job produces a separately billable return.
That makes 2.725 elapsed route hours per completed job. The owner must also reserve six paid weekly hours for quoting, purchasing, scheduling, records and administration. This case allows up to fifty owner hours per week, leaving forty-four for the route.
| Average completed jobs per day | Route hours per day | Weekly owner hours, including six admin hours | Roster result |
|---|---|---|---|
| 2 | 5.45 | 33.25 | Fits time; fails mature operating threshold |
| 3 | 8.18 | 46.88 | Fits the assumed fifty-hour owner week |
| 4 | 10.90 | 60.50 | Exceeds the funded roster |
Under a smoothly averaged week, the time ceiling is 44 ÷ 5 ÷ 2.725 = 3.23 completed jobs per field day. Actual appointment sizes, opening hours and supervision can make that ceiling lower. A helper does not automatically halve elapsed time, and the same person cannot be on two customer sites at once.
The base route leaves little time for adverse events. Increasing the callback allowance from fifteen to forty-five minutes per completed job pushes three daily jobs to 54.38 owner hours per week, including administration. That breaks the roster even if the invoice and contribution percentages remain unchanged. Repairing the problem requires better completion, a narrower menu/radius, revised prices or more qualified paid capacity.
A cheaper invoice can create an impossible volume answer
A sensitivity table is useful only when its extra volume can actually be delivered. The following cases hold five field days, 4.33 weeks, 75% contribution, $15,000 fixed costs and the same time mix constant. They do not claim that a lower-price service really consumes the same parts or time; that is the explicit stress assumption.
| Net invoice | Monthly operating result at three jobs per day | Break-even jobs per day | Capacity implication |
|---|---|---|---|
| $410 base | $4,972 | 2.25 | Below the 3.23 average time ceiling |
| $350 | $2,049 | 2.64 | Less operating buffer at the same workload |
| $300 | −$386 | 3.08 | Needs more than the three-job plan; little time slack |
| $275 | −$1,604 | 3.36 | Exceeds the 3.23 average time ceiling |
The $275 stress case is not solved by moving the job slider to four. Its average threshold already needs about 51.77 owner hours per week, before any additional disruption. A genuinely shorter service mix could change the answer, but it needs new measured durations, prices and costs rather than the old margin applied to a different job.
The $300 case illustrates a narrower distinction: it exceeds the planned three daily completions but remains below the simplified average time ceiling. A few longer days might fit mathematically; ordinary scheduling, customer access, helper coverage and rest still need testing. Rounding an average target up to four does not prove that four daily jobs are sustainable.
Pay for the owner before calling the remainder profit
BLS reports a May 2025 national median employee wage of $63,800 for the combined plumber, pipefitter and steamfitter occupation. It is context for a skilled trade, not a local hiring offer or an estimate of self-employed owner pay. The case deliberately includes paid owner labor in the cost base instead of treating all remaining contribution as owner earnings. BLS occupational profile.
For covered employee wages, 2026 IRS guidance includes employer Social Security of 6.2% up to its wage base and employer Medicare of 1.45%. Add applicable unemployment, workers' compensation, leave, overtime and benefits. The selected $16,000 allowance is not a statutory all-in burden rate. IRS Publication 15.
The helper has thirty paid weekly hours in the mature case, including travel. The assumed assignment is three selected route days using about 24.53 hours, plus about 5.47 hours of loading, stock and equipment tasks. Schedule two-person jobs on those days; the owner handles safely executable solo work on the other two days. If the real mix needs a helper on more visits, revise paid coverage and capacity rather than assuming free assistance. Those hours support parts handling, site protection, cleanup and permitted assistance where useful. They do not provide independent licensed cover or replace the owner when technical supervision is required. If the owner is absent, this modeled route has no funded independent lead.
Make local authority a condition of the budget
Verify contractor authority, individual plumber/helper status, supervision, permits and inspection in the actual state and municipality before accepting work. As one jurisdictional example, Texas requires a Responsible Master Plumber designation for its defined role and minimum commercial liability coverage of $300,000. Its supervision and permit duties matter to how a helper can be used; the coverage limit is not an annual premium. Texas responsible master plumber guidance.
California's C-36 classification describes a different broad plumbing-contractor scope. Reading that classification alone does not qualify a new operator or clear a local permit. Neither example grants nationwide permission for this route, and the case's excluded work remains excluded even where a broad license could eventually permit it. California C-36 classification.
Texas consumer guidance also calls for checking municipal requirements and obtaining detailed written estimates. That is useful discipline for comparing prices: specify the fixture, supplied parts, access, disposal, inspection, changed conditions and authorization. Texas consumer information.
Keep the opening reserve separate from operating break-even
The opening case allocates $125,000, including $50,000 unrestricted reserve. Its other uses are a $36,000 used van/upfit allowance, $14,000 selected equipment, $6,000 opening stock, $3,000 protection/PPE, $8,000 licensing/insurance/deposits, $6,000 launch systems and $2,000 storage setup/deposits. These are authored allowances to replace with local bids.
Ford's current $48,400 starting MSRP for a new Transit Commercial is a reference point for a different acquisition choice, before upfit and other charges. It does not verify a used vehicle's price or condition. Inspect the actual van, payload, storage and maintenance exposure before committing. Ford commercial vehicles.
The annual forecast and monthly sensitivity share 4.33 weeks per month and the full paid owner/helper base from launch. The first year starts at 20% of mature sales and adds ten percentage points a month until it reaches full volume. Its twelve monthly shares sum to 8.4 full-volume months. Years two and three each sum twelve full-volume months. Within whole-dollar rounding, Year three has $319,554 sales and $59,665 EBITDA; Year one has a $12,234 operating deficit.
The ramp first crosses operating break-even in month seven. Before then its cumulative operating deficit reaches about $36,075, leaving about $13,925 of the $50,000 reserve in this simplified same-month cash proxy. That minimum matters more than the smaller year-end loss. Actual collections, inventory payment and other excluded cash movements can create a lower balance.
The 4.33 convention averages 51.96 service weeks per year. It does not establish a calendar of uninterrupted attendance: owner absence or closures reduce completed work unless qualified relief is separately funded. This case has no independent licensed backup. Replace the averaged calendar with actual saleable days and coverage before relying on the forecast.
The first-year operating loss alone would leave about $37,766 of reserve, but the earlier monthly deficit is larger. Neither figure is a forecast bank balance after collections, parts-stock changes, tax, finance and replacement timing. A reserve is a funding allocation used to absorb cash needs; deducting the same reserve again as an operating expense would count it twice. SBA guidance separates opening costs from ongoing monthly commitments and emphasizes when funding is needed. SBA startup-cost guidance.
Decide with completed-job evidence
Before treating the three-job plan as viable, collect a paid trial in the actual territory. For every job, keep the approved scope, net retained invoice, parts used, related visits, travel/access/work time, paid person-hours, inspection, credits and collection date. Separate diagnostic-only outcomes from completed repairs and supplied-fixture work.
Proceed to a larger commitment only when ordinary days support the retained invoice and contribution inside the paid roster, local authority and insurance cover the actual work, and the dated cash plan retains usable reserve. If the route misses the test, narrow the menu or radius, revise the price/cost structure, improve completion or defer the commitment.
The evidence register separates source facts from authored inputs. The business plan explains the proposition and local adaptation; the financial model explains the documented customer-hour engine and its bridge to collected jobs. Its customer lifetime is not proof that households buy plumbing every month. The case calculator lets readers change the sales inputs while retaining these capacity and cash limits.