General Marketplace Break-Even Analysis: Month 7 Profitability

Fixed costs $60.6K/mo Core monthly burn

Contribution margin 81.5% After variable costs

Break-even revenue $74.3K/mo Monthly target

Break-even timing Month 7 Launch ramp

Break-even calculator

Test monthly revenue against variable expenses and fixed monthly costs to see where a marketplace crosses break-even.

Lean Base Full

Monthly revenue Revenue sets the pool that pays variable costs and fixed costs. $ Low sales High sales Variable expenses These rise with revenue, mainly marketing and support costs. $ Low costs High costs

Money available to cover fixed costs $60,350 $71,000 revenue - $10,650 variable expenses

Margin ratio

85%

Covers fixed costs

$550 short

Fixed monthly costs This is the monthly cost base break-even has to cover. $ Low base High base

Break-even chart Revenue Total costs

Which expenses stay fixed and which move with sales at break-even?

Cost classification

Break-even lands in Month 7, so the model has little room for sloppy cost labels. Treat stable overhead, usage fees, and staffing step-ups differently, or the break-even point will look safer than it is.

Expense	Cost	Break-Even Treatment	Common Mistake
Office Rent	Fixed	Include $5,000 per month from Month 1 through Month 60 regardless of order volume.	Lowering rent in the break-even case without changing the operating plan.
Legal & Compliance Services	Fixed	Include $2,500 per month as recurring operating overhead before contribution covers profit.	Treating recurring compliance work like a one-time setup item.
Core Salaries	Fixed	Include recurring leadership and base team payroll, including the CEO at $180,000 and CTO at $170,000 annual salary.	Counting founders as unpaid labor when the model already includes salaries.
Payment Processing Fees	Variable	Apply the first-year 2.0% rate against revenue because the fee rises with sales activity.	Using a flat monthly estimate that hides margin pressure as volume grows.
Digital Advertising (CAC)	Variable	Apply the first-year 12.0% rate and tie spend to buyer and seller acquisition volume.	Treating acquisition spend as optional when it drives supply and demand.
Customer Support (Variable)	Variable	Apply the first-year 3.0% rate because ticket load should rise with buyers, sellers, and orders.	Modeling support as flat while marketplace activity keeps climbing.
Platform Hosting & Licenses	Semi-variable	Apply the first-year 1.5% rate as usage-linked platform spend, then monitor capacity limits.	Assuming hosting scales perfectly with revenue and never needs plan upgrades.
Support, Engineering, Admin, and Analytics FTE Step-ups	Semi-fixed	Add headcount in steps as FTEs rise for the support manager, lead engineer, admin assistant, and data analyst.	Smoothing payroll as a percentage of sales instead of adding real hires by period.

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

Scenario table

Break-even moves up as fixed spend rises, so the same marketplace needs more monthly revenue to cover payroll, marketing, and support. The lean case is easiest to test, while the full case needs stronger funded demand.

Planning view only; these break-even figures are model assumptions, not guarantees.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch case	$62.0k	$11.5k	$50.5k	81.5%	$0	Lower fixed load makes validation easier.
Base traction case	$117.3k	$21.7k	$95.6k	81.5%	$0	Month 7 is the break-even signal, so runway must cover the launch ramp.
Full scale case	$183.6k	$29.4k	$154.3k	84.0%	$0	Higher fixed spend raises the break-even hurdle, so demand must stay strong.

What breaks first if revenue slips or costs rise?

Stress test

This marketplace has almost no room for error: a 10% revenue miss or a 10% fixed-cost bump each creates about a $115k monthly gap, and a margin hit from variable expenses rising to 21.5% adds about $42k more. Together, the hole is about $267k.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$1.408m	$0 cushion	Break-even lands in Month 7; buyer CAC above $15 or seller CAC above $150 starts to erode the plan.
Revenue shortfall	Revenue runs 10% below plan.	$1.408m	$115k gap	A 10% top-line miss wipes out the monthly cushion fast.
Fixed-cost increase	Fixed spend rises 10%.	$1.55m	$115k gap	Higher payroll or overhead pushes break-even up right away.
Margin pressure	Variable expenses rise to 21.5% of revenue.	$1.46m	$42k gap	Ad spend above 120% of revenue or support above 30% cuts the margin.
Combined pressure	Revenue falls 10%, fixed spend rises 10%, and variable expenses rise to 21.5%.	$1.61m	$267k gap	Demand and cost pressure together erase the cushion quickly.

What must you verify before you commit the first big spend on this marketplace?

Founder checklist

Before you scale seller and buyer spend, prove the CAC targets, mix, and unit economics can carry the opening burn. If Year 1 can’t hold at $150 seller CAC and $15 buyer CAC, don’t expand the budget.

1Runway$389k

Hold at least $389k in Month 6, because opening burn is about $60.6k/mo, break-even lands in Month 7, and payback takes 17 months.

2Seller CAC$150

Prove you can acquire sellers at $150 CAC before you add to the $250k Year 1 seller budget, which only buys about 1,667 sellers at that cost.

3Buyer CAC$15

Prove buyer acquisition at $15 CAC before you scale the $400k Year 1 buyer budget, which only buys about 26,667 buyers at that cost.

4Seller Mix60/30/10

Check that seller mix stays near 60% small business, 30% professional, and 10% enterprise, since fee yield and support load change with the mix.

5Buyer Mix70/25/5

Validate that buyers stay near 70% casual, 25% frequent, and 5% power user, because repeat orders and subscription revenue depend on that split.

6Unit Economics$50.75 AOV / 1.435 orders

Test whether Year 1 weighted AOV stays near $50.75 and repeat orders near 1.435 per buyer; at 8.0% plus $0.50 per order, commission is about $4.56 per order before subscription fees.