CO2 Generator for Greenhouses Break-Even: $88K Monthly Revenue

Fixed costs $11.6K/mo Base overhead

Contribution margin 80.5% After variable costs

Break-even revenue $72.2K/mo Cover all load

Break-even timing Month 14 Model ramp point

Break-even calculator

Test how monthly revenue, variable expenses, and fixed costs set the break-even point for a greenhouse CO2 generator business.

Lean Base Full

Monthly revenue Revenue sets the pool that covers direct costs and then fixed costs. $ Low sales High sales Variable expenses Use costs that rise with each sale, like sourcing, freight, and payment fees. $ Low direct High direct

Money available to cover fixed costs $51,856 $64,417 revenue - $12,561 variable expenses

Margin ratio

81%

Covers fixed costs

$25,999 short

Fixed monthly costs These are the monthly costs the business must cover before profit starts. $ Lean team Heavier build

Break-even chart Revenue Total costs

Which expenses stay fixed and which move with sales for a greenhouse equipment supplier?

Cost classification

Break-even is reliable only if each expense behaves correctly in the model. Fixed bills set the monthly hurdle, while sourcing, freight, fees, marketing, and labor rise as orders scale.

Expense	Cost	Break-Even Treatment	Common Mistake
Warehouse Lease	Fixed	Use $6,500 per month as overhead that must be covered before profit.	Spreading rent across units and hiding the true monthly hurdle.
E-commerce Hosting and SaaS	Fixed	Use $1,200 per month through the planning period.	Tying hosting to sales even though the base bill is stable.
Business Insurance	Fixed	Use $850 per month as a recurring operating expense.	Leaving insurance out of break-even because it is not tied to orders.
Hardware Sourcing and Quality Assurance	Variable	Model as 12.0% of first-year revenue, made up of 9.0% sourcing and 3.0% quality assurance.	Treating product handling as fixed and overstating contribution margin.
Logistics and Freight Fulfillment	Variable	Model as 5.0% of first-year revenue because freight moves with shipped orders.	Holding freight flat when more orders create more shipments.
Payment Processing and Platform Fees	Variable	Model as 2.5% of revenue in each year.	Forgetting that card and platform fees rise with sales volume.
Online Marketing	Semi-variable	Use the $150,000 first-year budget, then track order growth against $250 customer acquisition cost.	Calling the full budget fixed and missing CAC pressure.
Technical Support and Warehouse Labor	Semi-fixed	Step headcount up as volume rises; support moves from 1 to 5 FTE and warehouse labor from 2 to 8 FTE over the model.	Treating support and fulfillment labor as fixed when staffing rises with orders.

How does break-even shift from a lean launch to a full-service greenhouse CO2 setup?

Scenario table

Lean year 1 is still below break-even, base year 2 clears it, and full year 3 gives the widest cushion. Variable costs stay near 18% to 20% of sales, so rising revenue and slower fixed-cost growth drive the turn.

Planning case only: these figures are model assumptions, not guarantees, and actual break-even will move with pricing, mix, freight, and staffing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean greenhouse launch	$64.4K	$12.6K	$77.9K	80.5%	-$26.0K	Still below break-even, so cash burn stays likely.
Base regional supply plan	$176.8K	$32.9K	$96.5K	81.4%	$47.4K	Above break-even with a workable cushion.
Full-service expansion plan	$468.3K	$82.9K	$121.1K	82.3%	$264.3K	Well above break-even, but service and warehouse capacity must keep up.

What pushes this break-even plan off track?

Stress test

If sales miss plan or freight rises, break-even gets tight fast. It starts near $877K a month, but a 10% overhead jump or combined cost pressure pushes it to about $1.03M.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$877K/month	$233K gap	Current monthly revenue sits below break-even, so there is no cushion yet.
Revenue shortfall	Monthly revenue runs 15% below the $644K plan and lands near $548K.	$877K/month	$329K gap	A 15% miss leaves a wide gap and makes Month 14 harder to hold.
Fixed-cost pressure	Overhead rises 10% and fixed costs move from $706K to $777K a month.	$965K/month	$321K gap	A bigger fixed base pushes the target farther away.
Margin pressure	Variable expenses rise from 19.5% to 24.5%, cutting contribution margin to 75.5%	$935K/month	$291K gap	Freight or sourcing pressure eats margin fast.
Combined pressure	Fixed costs rise 10% and variable expenses move to 24.5%.	$1.03M/month	$385K gap	Sales softness plus cost pressure creates the widest hole.

What should you verify before you commit to the greenhouse launch?

Founder checklist

Before you lock the warehouse and launch spend, prove the sales path, cost stack, and cash cushion can carry you to breakeven. If any of those break, the Month 14 target slips fast.

1Sales path$877K/mo

Verify quotes, preorders, or distributor commitments can support at least $877K in monthly sales before you sign the lease, because that is the scale the model needs to reach breakeven.

2CAC$250

Keep Year 1 customer acquisition cost near $250 while holding the $150K marketing budget, or the sales plan will get expensive before volume kicks in.

3Margin stack80.5% CM

Hold sourcing, packaging, freight, and payment fees near 19.5% of sales so contribution margin, the dollars left after variable costs, stays around 80.5% and can fund payroll and rent.

4Fixed load$11.6K/mo

Check that warehouse, SaaS, insurance, utilities, accounting, and office costs really stay near $11.6K a month, because that fixed load sits on top of the margin stack.

5Cash cushion$411K

Keep enough cash to cover the Month 13 low point of $411K, since EBITDA is still negative in Year 1 and breakeven does not land until Month 14.

6Launch buildout$232.5K

Stage the $232.5K launch capex, including $45K for racking, $35K for loading equipment, and $60K for e-commerce development, and only add support and warehouse hires when repeat refill and support-plan orders justify the step-up.