Sustainable Business Break-Even: $25K/Month To Cover Costs

Fixed costs $6.0K Core monthly overhead

Contribution margin 80.5% After variable costs

Break-even revenue $7.5K Monthly target sales

Break-even timing Month 26 EBITDA turns positive

Break-even calculator

Test whether monthly revenue can cover variable costs and the fixed cost base for this sustainable business.

Lean Base Full

Monthly revenue Revenue sets the cash left after direct costs to cover overhead. $ Early sales Peak sales Variable expenses These are direct costs that rise with each sale, including product, packaging, shipping, and fees. $ Low direct costs High direct costs

Money available to cover fixed costs $41,973 $51,000 revenue - $9,027 variable expenses

Margin ratio

82%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly overhead the margin has to cover. $ Lean overhead Heavy overhead

Break-even chart Revenue Total costs

Which expenses are fixed, variable, or step up with sales for this eco product business?

Cost classification

Break-even only works if monthly overhead, per-sale charges, and staffing steps stay in the right buckets. Keep the $72,000 one-time setup spend outside core monthly break-even so it doesn’t overstate the sales target.

Expense	Cost	Break-Even Treatment	Common Mistake
Wholesale Product Costs	Variable	Use 12.0% of revenue in the first year, falling to 10.0% by the fifth year.	Treating product purchases like flat overhead instead of a sale-linked charge.
Eco-Packaging Materials	Variable	Apply 2.0% of revenue in the first year, declining to 1.5% by the fifth year.	Leaving packaging out of contribution margin and overstating profit per order.
Shipping & Fulfillment Fees	Variable	Model as 3.0% of revenue in the first year, improving to 2.2% by the fifth year.	Using one flat monthly shipping budget even as order volume changes.
Payment Processing & Platform Fees	Variable	Charge 2.5% of revenue in the first year, stepping down to 2.0% by the fifth year.	Forgetting payment fees when calculating contribution margin.
E-commerce Platform Subscription	Fixed	Include $2,000 per month as recurring overhead from Month 1 through Month 60.	Spreading it per unit and making low-volume months look too cheap.
Web Hosting & Domain	Fixed	Include $150 per month as stable operating overhead.	Ignoring small fixed bills that add up across the year.
Wages and Salaries	Semi-fixed	Model payroll in steps as FTEs rise, including support from Month 13 and logistics from Month 25.	Assuming payroll moves smoothly with revenue instead of hiring in chunks.
Utilities & Internet	Semi-variable	Start with the $200 monthly base and raise it only if usage grows with operations.	Calling the full bill fixed when scale may add usage charges.

How does break-even shift from a lean launch to a full-scale year for this business?

Scenario table

Contribution margin, the share left after variable costs, rises from 80.5% to 84.3% as volume scales and fees ease. That pushes the lean case below break-even, the base case into profit, and the full case into a wider cushion.

Planning cases only; actual break-even will move with pricing, mix, fees, and staffing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch (Year 1)	$13.8k	$2.7k	$20.4k	80.5%	-$9.3k	Still below break-even; this scale needs more sales or leaner overhead.
Base growth (Year 3)	$51.0k	$9.0k	$32.5k	82.3%	$9.5k	Positive coverage; this is the first case that clears break-even and matches Month 26.
Full scale (Year 5)	$92.2k	$14.5k	$35.0k	84.3%	$42.8k	Strong cushion; Year 5 supports scaled profit and lower cash risk.

What breaks the break-even plan if sales slow or costs rise?

Stress test

The plan only works if demand hits the Year 3 monthly pace and costs stay contained. The cushion is real, but slower conversion, sourcing inflation, packaging pressure, or early hiring can erase it.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$415,000	$95,000 cushion	Break-even holds if Year 3 demand stays on track.
Revenue shortfall	Monthly revenue falls to the Year 2 level of $283,000.	$374,000	$91,000 gap	Slower conversion or weaker repeat sales push the plan below break-even.
Fixed-cost pressure	Fixed costs rise to $350,000 a month in Year 4.	$440,000	$70,000 cushion	Higher support, software, or space costs eat into the margin fast.
Margin pressure	Use the Year 1 margin instead of the Year 3 margin.	$424,000	$86,000 cushion	Sourcing price increases or packaging inflation leave less room for error.
Combined pressure	Use Year 2 revenue, the Year 1 margin, and Year 4 fixed costs together.	$404,000	$121,000 gap	Weak demand and higher costs turn the plan loss-making.

What should you verify before you commit to inventory, hires, and setup spend?

Founder checklist

Before you commit to inventory, hires, or setup spend, verify the business can reach the $253k/month break-even run rate without breaking cash. Year 1 variable costs are about 19.5% of sales, but the plan still needs $552k minimum cash by Month 36, so timing matters as much as margin.

1Sales Target$253k/mo

Confirm demand can scale from launch volumes to the monthly sales level needed for break-even before you lock in bigger commitments.

2Variable Load19.5%

Test whether wholesale, packaging, shipping, and processing stay near 19.5% of revenue in small batches, because margin loss pushes break-even out fast.

3Product Cost12.0%

Verify wholesale product costs hold at 12.0% of sales in Year 1, since this is the biggest control on contribution margin.

4Launch Costs$72k

Stage the $72k setup spend against validated demand, and release it in steps only after early sales prove the launch path.

5Inventory Check$25k

Review the $25k initial inventory buy before placing larger orders, so stock does not outrun real sell-through.

6Runway Cushion$552k

Protect cash for the long ramp, because minimum cash reaches $552k in Month 36 and payback does not arrive until Month 57.