HVAC Coil Cleaning Break-Even Analysis: $565K Monthly Sales

Fixed costs $9.1K/mo Base overhead

Contribution margin 86.3% After variable costs

Break-even revenue $10.5K/mo Monthly target

Break-even timing Month 4 Launch ramp

Break-even calculator

See how monthly revenue, variable expenses, and fixed monthly costs shape break-even for an HVAC coil cleaning service.

Lean Base Full

Monthly revenue Revenue is the cash in each month that must cover direct cost and overhead. $ Low sales High sales Variable expenses These are direct costs that rise with each job, like cleaning materials and vehicle use. $ Low direct cost High direct cost

Money available to cover fixed costs $127,946 $148,250 revenue - $20,304 variable expenses

Margin ratio

86%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly overhead the service must cover before profit starts. $ Low overhead High overhead

Break-even chart Revenue Total costs

Which coil cleaning expenses stay fixed, and which move with sales?

Cost classification

Break-even is only useful if fixed spend, variable spend, and staffing steps are separated. Monthly overhead sets the revenue floor, while cleaning solutions, fuel, technician capacity, and marketing efficiency drive contribution margin.

Expense	Cost	Break-Even Treatment	Common Mistake
Office and Dispatch Center Rent	Fixed	Include $3,500 per month from Month 1 through Month 60 before calculating break-even revenue.	Treating rent as if it rises with each cleaning job.
Customer Relationship Management (CRM) and Scheduling Software	Fixed	Include $1,200 per month as recurring overhead in the monthly break-even base.	Pushing software into variable expense because scheduling volume grows.
Business Insurance and Liability	Fixed	Include $2,100 per month as required operating overhead across the planning range.	Leaving insurance out until technicians are fully booked.
Payment Processing Fees	Fixed	Use the model’s $500 monthly payment processing assumption in fixed overhead.	Replacing the monthly assumption with an unprovided sales percentage.
Eco-Friendly Cleaning Solutions	Variable	Deduct 8.5% of revenue in the first year, falling to 7.5% by Year 5.	Modeling cleaning solution use as a flat monthly supply budget.
Vehicle Fuel and Maintenance	Variable	Deduct 5.2% of revenue in the first year, falling to 4.4% by Year 5.	Treating route fuel as fixed even when job volume changes.
Service Technician Salaries	Semi-fixed	Step payroll capacity from 2.0 full-time equivalents in the first year to 14.0 by Year 5.	Spreading technician pay evenly per job instead of adding staff in hiring steps.
Annual Marketing Budget	Semi-variable	Plan annual spend from $180,000 to $420,000, while customer acquisition cost moves from $85 to $65.	Treating all marketing as fixed and ignoring acquisition efficiency.

How does break-even change from a lean launch to a full route network?

Scenario table

Here’s the quick math: Year 1 is the lean launch, Year 2 is the base plan, and Year 5 is the full build. CM rises from 86.3% to 88.1%, but fixed load also climbs, so route density still decides the cushion.

Planning assumptions only; real break-even will shift with pricing, staffing, and route density.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean residential launch	$1.78M	$244K	$488K	86.3%	$904K	Revenue clears break-even, but the cushion is thinnest here.
Base mixed-route plan	$3.65M	$481K	$649K	86.8%	$2.31M	This is the pivot point where denser routes start to matter more.
Full commercial-density plan	$9.30M	$1.11M	$1.29M	88.1%	$6.34M	Commercial and multi-unit density gives the widest cushion against fixed overhead.

What can break the break-even plan for this HVAC coil cleaning service?

Stress test

The plan has a solid starting cushion, but it gets fragile fast if bookings slip or costs creep. Weak lead conversion, long drive times, fuel creep, chemical waste, and underused technicians are the first warning signs.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$565,000	$918,000 cushion	Strong starting cushion if bookings land on plan.
Revenue shortfall	Bookings run 10% below plan.	$565,000	$49,000 gap	A small miss can erase the month’s margin.
Fixed-cost pressure	Fixed costs rise 10%.	$622,000	$57,000 gap	Higher rent or payroll pushes the bar up.
Margin pressure	Variable expense load moves from 137% to 187%.	$600,000	$35,000 gap	Fuel, drive time, and chemical waste squeeze margin.
Combined pressure	Revenue is 10% lower, variable expense reaches 187%, and fixed outlay rises 10%.	$687,000	$122,000 gap	Three hits together can wipe out most of the cushion.

What should the founder verify before buying vehicles and equipment?

Founder checklist

Test demand, route density, and unit economics before you buy the $120K fleet and $45K equipment set. The model only works if booked jobs cover the $9.1K monthly overhead, the 13.7% variable cost load, and the Month 2 cash dip.

1Price signal$49.99-$299.99

Verify that the four service prices convert into booked jobs before you commit to the fleet.

2Monthly overhead$9.1K/mo

Confirm the office, software, insurance, supplies, communications, accounting, and processing load stays covered before payroll grows.

3Unit margin86.3% CM

Check that each job still keeps about 86.3% after cleaning solutions and fuel, because that margin has to fund fixed costs.

4Tech ramp2.0→14.0 FTE

Map routes and booked volume before adding technicians, so travel time does not outrun service capacity.

5Cash cushion$787K, Month 2

Hold enough cash to survive the Month 2 low point, because payback is not expected until Month 8.

6Launch control4 weekly KPIs

Track booked jobs, completed jobs, callbacks, and travel time every week, and confirm cleaning-solution supply stays available at 8.5% of revenue.