Greenhouse Construction Break-Even Revenue: $110K/Month

Fixed costs $89.5K/mo Payroll + overhead

Contribution margin 81.7% After variable costs

Break-even revenue $109.6K/mo Monthly target

Break-even timing Month 1 First breakeven

Break-even calculator

Test whether monthly revenue covers direct build costs and fixed overhead.

Lean Base Full

Monthly revenue Revenue sets the pool that can cover direct build costs and fixed overhead. $ Low revenue High revenue Variable expenses Direct materials, labor, and install costs rise as more jobs ship. $ Low costs High costs

Money available to cover fixed costs $1,074,046 $1,207,298 revenue - $133,252 variable expenses

Margin ratio

89%

Covers fixed costs

Yes

Fixed monthly costs Rent, salaries, software, and insurance stay monthly and must be covered. $ Lean overhead Heavy overhead

Break-even chart Revenue Total costs

Which greenhouse construction expenses are fixed, and which move with sales?

Cost classification

Break-even is only useful if fixed overhead stays separate from per-build charges. Monthly overhead and payroll set the hurdle, while materials and revenue-linked fees decide contribution margin.

Expense	Cost	Break-Even Treatment	Common Mistake
Office rent	Fixed	Include $8,500 per month in overhead.	Assigning rent to one project.
R&D lab rent	Fixed	Include $4,000 per month in overhead.	Charging the full lab to one build.
Software subscriptions	Fixed	Include $1,800 per month from launch month.	Burying recurring software in setup spend.
Legal and accounting fees	Fixed	Include $2,000 per month in overhead.	Treating all professional fees as tax advice.
Marketing and advertising	Fixed	Include $3,000 per month in overhead.	Tying all marketing to sales volume.
Recurring payroll	Semi-fixed	Cover first-year salaries of $810,000, or $67,500 per month, before owner distributions.	Confusing salary expense with owner profit.
Steel, glazing, controls, irrigation, and assembly labor	Variable	Include $6,000 to $31,000 per build by project tier.	Averaging all builds blindly.
Sales commissions, installation subcontractors, and revenue-linked factory charges	Variable	Reduce first-year contribution by 10.0% of revenue.	Omitting these charges from bid pricing.

How does break-even shift from a lean launch to a full pipeline?

Scenario table

Break-even gets safer as the pipeline fills because revenue grows faster than fixed cost. The lean case still clears break-even, but it carries the tightest cushion, so sales timing matters more than the build spec.

Planning assumptions only; actual results will move with mix, pricing, labor, and project timing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch case	$485.4K	$89.1K	$89.1K	81.6%	$296.4K	Clears break-even, but the cushion is thin.
Base operating case	$1.207M	$212.9K	$88.8K	82.4%	$868.8K	Healthy cushion; this is the planning midpoint.
Full pipeline case	$2.275M	$367.3K	$108.6K	83.9%	$1.745M	Strong cushion, if sales pace holds.

What breaks the break-even plan for a greenhouse builder?

Stress test

The base plan has a wide cushion, but break-even gets tight fast if signed work slows or steel, glazing, or subcontractor costs move up. The combined stress case still clears the line, yet one delayed project could erase the buffer.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change in revenue or cost rates.	$110K	$375K cushion	Healthy cushion, but overhead is still heavy.
Revenue shortfall	Monthly revenue falls 25% to about $364K.	$110K	$254K cushion	Lower bookings still cover break-even, but slack shrinks.
Fixed-cost pressure	Fixed monthly costs rise 15% to about $1,029K.	$126K	$359K cushion	Higher overhead trims room for delays.
Margin pressure	Variable costs rise by 10 percentage points.	$125K	$360K cushion	Steel, glazing, or install creep pushes break-even up.
Combined pressure	Revenue drops 50% while fixed costs rise 15% and margin slips.	$172K	$71K cushion	One delayed project can wipe out the monthly buffer.

What should you verify before committing to the first greenhouse build?

Founder checklist

Before you commit, make sure signed backlog clears about $110K a month and that Year 1 still holds an 81% contribution margin. Also keep at least $1.072M in cash, because the opening month carries about $800K of startup capex before operating cash starts to turn.

1Backlog Coverage$110K/mo

Verify signed bids or deposits clear the monthly break-even line before you commit to the first build wave, or fixed payroll and overhead will outrun sales.

2Fixed Run Rate$89.5K/mo

Confirm the month-to-month overhead and payroll total stays near $89.5K so you know the cash you must cover before any owner draw.

3Contribution Margin81% CM

Keep sales commissions at 4.0% and installation subcontractor fees at 3.0%, and confirm steel, glazing, controls, and irrigation quotes still leave about 81% to absorb fixed costs.

4Staffing Load7 FTE

Keep the opening team aligned to the seven named roles and hire against booked project load, not optimism, so payroll does not outrun installed work.

5Cash Buffer$1.072M

Hold at least the modeled minimum cash because about $800K of startup capex lands up front and EBITDA is not cash in the bank.

6Launch GateMonth 1

Treat Month 1 as the stress test; if the first signed jobs and customer payments are not in hand, the build plan can slip before revenue catches up.