E-Commerce Marketplace Break-Even Analysis: $69K Monthly Revenue

Fixed costs $37.2K/mo Year 1 base burn

Contribution margin 90% After variable costs

Break-even revenue $41.4K/mo Monthly target

Break-even timing Month 8 Model ramp point

Break-even calculator

Use this calculator to test monthly revenue, variable expenses, and fixed costs against break-even for a marketplace.

Lean Base Full

Monthly revenue Revenue is the cash pool that covers direct costs and overhead. $ Low sales High sales Variable expenses These are direct costs that rise as sales and seller payouts rise. $ Low direct cost High direct cost

Money available to cover fixed costs $75,000 $150,000 revenue - $75,000 variable expenses

Margin ratio

50%

Covers fixed costs

Yes

Fixed monthly costs These are the monthly costs your margin must cover. $ Lean overhead High overhead

Break-even chart Revenue Total costs

Which marketplace expenses are fixed, and which move with sales for break-even?

Cost classification

Break-even is only reliable if fixed overhead, usage-linked fees, and staffing steps are separated. This model reaches break-even in Month 8, so small classification errors can move the target month fast.

Expense	Cost	Break-Even Treatment	Common Mistake
Base operating overhead	Fixed	Use $8,900 per month for office rent, legal and accounting, general software, platform maintenance, insurance, utilities and internet, and admin supplies.	Spreading fixed overhead as a percent of sales and hiding the real monthly burn.
Payroll	Semi-fixed	Model staffing in steps by full-time equivalent. First-year wages are about $28.3k per month from the CEO, CTO, 0.5 Lead Engineer, and 0.5 Marketing Manager.	Treating payroll like it rises smoothly with every order instead of jumping when headcount is added.
Payment Processing Fees	Variable	Apply the operating fee as 3.0% of revenue in the first year, falling to 2.0% in Year 5.	Using gross order value without matching the fee base used in the model.
Performance Marketing	Variable	Apply 3.0% of revenue in the first year, falling to 2.0% in Year 5, alongside planned buyer and seller acquisition budgets.	Calling all marketing fixed when paid acquisition changes with growth targets.
Server Hosting and Infrastructure	Semi-variable	Use 2.0% of revenue in the first year, falling to 1.0% in Year 5, to reflect scale benefits as usage grows.	Modeling hosting as flat rent even though traffic, storage, and transactions push usage up.
Customer Support	Semi-variable	Use 2.0% of revenue in the first year, falling to 1.0% in Year 5, then test if support staffing lags order growth.	Counting support only in payroll and missing ticket volume tied to orders and sellers.

How does break-even shift across lean, base, and full marketplace scenarios?

Scenario table

As the mix shifts from small sellers and casual buyers to larger sellers and repeat buyers, AOV and fees rise, so break-even revenue climbs. Fixed burn also scales from about $622k to about $3.4M, so adoption has to keep pace.

Planning assumptions only; actual break-even will move with mix and adoption.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean marketplace, Year 1 economics	$691k	$69k	$622k	90.0%	-$92k	Little cushion; a small miss on adoption can push it off break-even.
Base marketplace, Year 2 economics	$1.25M	$113k	$1.14M	90.8%	$1.35M	Break-even is reachable, but only if CAC keeps improving.
Full marketplace, Year 5 economics	$3.62M	$217k	$3.40M	94.0%	$22.85M	Best cushion, but seller and buyer adoption must scale fast enough.

What breaks first if marketplace economics slip?

Stress test

Year 1 break-even sits at about $691k a month on a $622k fixed burn and a 90% contribution margin. The plan gets fragile fast if revenue misses, overhead rises, or margin slips toward 40%; combined pressure pushes break-even close to $1.57M.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	Base Year 1 assumptions hold.	$691k/month	$0 gap	Break-even is met only at the base case.
Revenue shortfall	Monthly revenue comes in $10k below plan.	$701k/month	$10k gap	A small miss eats most of the dollar lost, so the cushion is thin.
Fixed-cost pressure	Monthly overhead rises by $5k before scale improves.	$747k/month	$56k gap	Extra overhead pushes the break-even line out fast.
Margin pressure	Variable expense rises to 60% of revenue, cutting contribution margin to 40%.	$1.56M/month	$864k gap	Lower margin more than doubles the revenue needed to break even.
Combined pressure	Revenue lags, overhead rises by $5k, and variable expense stays at 60%.	$1.58M/month	$887k gap	This is the hardest case: weaker revenue and margin push breakeven far out.

What should you verify before hiring past the core team and scaling paid traffic?

Founder checklist

Don’t scale past the core team until seller flow, buyer conversion, and order-level margin work at the model’s CAC and fee levels. The business reaches breakeven in Month 8 and needs about $526K of minimum cash, so every new dollar of payroll or ads has to earn its keep fast.

1Seller supply$200 CAC

Verify you can add sellers at roughly $200 CAC and shift the mix beyond 70% small business without weakening support or fee yield.

2Buyer launch$20 CAC

Test buyer acquisition at about $20 CAC and run real payments, refunds, chargebacks, and support before you scale the Year 1 $200K media budget.

3Take rate$0.50 + 8.0%

Check that each order still clears the $0.50 fee plus 8.0% commission after payment, hosting, support, and promotion costs.

4Fixed burn$37.2K/mo

Hold monthly fixed burn near $37.2K; if it rises faster than order volume, breakeven slips.

5Core rampMonth 13

Delay the Month 13 support and admin hires until volume justifies them, because the Year 1 core four already carry the build.

6Cash reserve$526K

Keep at least $526K of cash ready through Month 8, so you do not treat GMV as spendable cash.