Rooftop Garden Installation Break-Even Analysis: $52K/Month

Fixed costs $35.2K/mo Year 1 base

Contribution margin 72% After variable costs

Break-even revenue $48.9K/mo Monthly target

Break-even timing Month 4 Model break-even

Break-even calculator

Test monthly revenue, variable expenses, and fixed costs against monthly break-even for a rooftop garden installation service.

Lean Base Full

Monthly revenue Revenue is the top line that has to cover direct costs and then fixed overhead. $ Low sales High sales Variable expenses Use direct costs that rise with each project, like materials, subcontracted labor, rental gear, and travel. $ Light direct cost Heavy direct cost

Money available to cover fixed costs $83,500 $116,000 revenue - $32,500 variable expenses

Margin ratio

72%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly cost base that contribution margin has to cover, including overhead and core payroll. $ Lean overhead High overhead

Break-even chart Revenue Total costs

Which expenses stay fixed, and which move with rooftop garden sales?

Cost classification

Break-even is only useful if project-linked spend stays variable and monthly overhead stays fixed. In the first operating year, fixed overhead is about $35.2k/month, while direct job-linked spend runs 28% of revenue.

Expense	Cost	Break-Even Treatment	Common Mistake
Office and Warehouse Rent	Fixed	Include $4,000/month in fixed overhead from Month 1 through Month 60.	Tying rent to each job instead of carrying it every month.
Design Software Licenses	Fixed	Include $800/month as a fixed platform expense for design and estimating work.	Dropping software from break-even because it feels small.
Salaried Payroll	Fixed	Use committed salaries in fixed overhead; first-year wages are $337.5k/year, or about $28.1k/month.	Treating salaried staff as variable labor even when paid between projects.
Project Materials, Plants, Soil, and Irrigation	Variable	Apply 18% of revenue in the first year because this spend rises with installed projects.	Calling plants, soil, irrigation, or drainage overhead instead of project-linked spend.
Subcontracted Installation Labor	Variable	Apply 7% of revenue in the first year; include it only when project volume is sold.	Parking subcontractors in fixed payroll and overstating break-even risk.
Utilities for Office and Warehouse	Semi-variable	Start with the $600/month base, then watch for usage spikes as project load rises.	Assuming utilities never move, even when shop work and staging increase.
Project Travel and Logistics	Variable	Apply 1% of revenue in the first year because site trips and deliveries follow jobs.	Blending delivery runs into general admin and hiding job margin leaks.
Installation Technician Hiring	Semi-fixed	Add salary in steps as capacity fills; technicians rise from 2.0 FTE in the first year to 6.0 FTE by the fifth year.	Modeling labor as smooth when hiring happens in full-person jumps.

How does break-even shift from lean to base to full rooftop garden installation?

Scenario table

Variable costs take about 28% of revenue, so fixed costs do the heavy lifting. At $373k of monthly fixed costs, the lean case stays short, the base case is near break-even, and the full case creates a cushion.

Planning assumptions only; actual break-even can move with site mix, labor efficiency, and project timing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean rooftop installation	$360k	$101k	$373k	72%	-$114k	Still below break-even; fixed costs outrun contribution.
Base rooftop installation	$540k	$151k	$373k	72%	$16k	Near break-even; a small volume lift adds profit.
Full rooftop installation	$720k	$202k	$373k	72%	$145k	Above break-even; this level builds a workable cushion.

What pressures push rooftop garden installation below break-even?

Stress test

The base plan has only about a $22k cushion above break-even, so a 15% revenue drop or a 10% jump in fixed overhead can flip it negative. Material overruns, subcontractor rework, and travel-heavy jobs make that cushion thin.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$518k	$22k cushion	Small cushion, so timing matters.
Revenue shortfall	Revenue falls 15% to $459k.	$518k	$59k gap	Slow close rates can wipe out profit fast.
Fixed-cost pressure	Fixed overhead rises 10% to $410k a year.	$570k	$30k gap	Higher overhead leaves less room for delay.
Margin pressure	Variable expenses rise to 33% of revenue.	$557k	$17k gap	Material overruns and rework eat the margin.
Combined pressure	Revenue falls 15%, variable expenses rise to 33%, and fixed costs rise 10%.	$612k	$153k gap	Delay-heavy jobs can turn into a deep loss.

What should you verify before you commit to the lease, vehicles, and hiring for a rooftop garden installation business?

Founder checklist

Don’t lock in the big spend until the pipeline, site-work process, and unit economics all hold up. In this model, the Year 1 fixed load is about $35.2K a month, so weak demand or slow starts can turn into cash pressure fast.

1Signed pipeline3 installs/mo

Verify signed work for at least three $18,000 installs a month before you add lease, vehicles, equipment, or hires, and make sure roof access, structural sign-off, permit duties, and insurance are clear before site work.

2Fixed burn$35.2K/mo

Confirm the Year 1 rent, software, insurance, utilities, accounting, IT, admin, and wages are all funded, because that is the monthly load you must cover before growth helps.

3Project margin72% CM

Check that Year 1 materials, subcontracted installation labor, equipment rental, and travel still leave about 72% contribution on each install to pay fixed costs.

4Crew capacity3 installs/mo

Prove the crew can complete at least three installs a month without overtime, delays, or rework, or the Month 4 break-even date will slip.

5Cash cushion$773K

Hold enough cash to get through the Month 2 low point before you buy the second vehicle, hoist, or added staff.

6CAC control$1.5K

Keep Year 1 customer acquisition cost near $1,500 per project so marketing does not eat the gross contribution needed to reach break-even.