Break-Even Revenue for an Online Thrift Store: $58K/Month

Fixed costs $25.5K/mo Base overhead

Contribution margin 83.5% After variable costs

Break-even revenue $30.5K/mo Monthly target

Break-even timing Month 26 Model crossover

Break-even calculator

Use this to test monthly revenue against variable expenses and the fixed cost base break-even must cover.

Lean Base Full

Monthly revenue Revenue is the cash that has to absorb direct costs and still leave room for fixed costs. $ Low sales High sales Variable expenses These are direct costs that rise with each sale, like inventory, shipping, and payment fees. $ Light cost Heavy cost

Money available to cover fixed costs $144,495 $169,000 revenue - $24,505 variable expenses

Margin ratio

86%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly cost base break-even revenue has to cover before profit starts. $ Lower base Higher base

Break-even chart Revenue Total costs

Which online thrift store expenses are fixed, and which move with sales?

Cost classification

Break-even gets unreliable when monthly overhead is mixed with order-level resale costs. Keep fixed expenses separate from sales-linked costs, so Month 26 breakeven is tested against the right gross margin.

Expense	Cost	Break-Even Treatment	Common Mistake
Warehouse Rent	Fixed	Use $3,500 per month as base overhead from Month 1 through Month 60.	Spreading rent across orders and hiding the true monthly sales hurdle.
Platform Hosting & Software Licenses	Fixed	Use $1,200 per month as recurring platform overhead.	Treating the full software stack as usage-based without a modeled usage driver.
Founder CEO, Head of Operations, and Lead Curator payroll	Fixed	Treat as stable management payroll in the break-even base.	Excluding leadership payroll to make break-even look earlier than Month 26.
Customer Support Specialist and Inventory Processor payroll	Semi-fixed	Model staffing in FTE steps as order volume and processing load rise.	Scaling these roles smoothly with revenue instead of adding capacity in hiring blocks.
Inventory Acquisition Cost	Variable	Apply 9.0% of first-year revenue, stepping down to 7.0% by Year 5.	Booking inventory buys as fixed overhead instead of resale margin pressure.
Outbound Shipping Costs	Variable	Apply 3.5% of first-year revenue, stepping down to 2.5% by Year 5.	Ignoring shipping in contribution margin and overstating profit per order.
Payment Processing Fees	Variable	Apply 2.0% of revenue each year because fees move with sales.	Putting processing fees below EBITDA and overstating break-even contribution.
Marketing Budget	Semi-variable	Use the $150,000 first-year budget, then tie acquisition output to $25 CAC.	Treating ad spend as fully fixed while customer volume depends on CAC.

How does break-even change as this online thrift store moves from lean launch scale to base and full scale?

Scenario table

The break-even bar rises with each larger format because marketing, staff, and overhead all scale up. The margin also improves, so the business gets more cushion only after sales volume clears the fixed-cost load.

Planning assumptions only. Real break-even will move with sell-through, shipping, and marketing efficiency.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch case	$58.2k	$9.6k	$48.6k	83.5%	$0	Near break-even, but CAC or shipping creep can turn it negative fast.
Base modeled case	$90.7k	$13.1k	$77.5k	85.5%	$0	This is the modeled crossover point and the cleanest operating target.
Full scale case	$114.8k	$14.4k	$100.5k	87.5%	$0	This gives the widest cushion against slower inventory turnover.

What pushes this online thrift store below break-even?

Stress test

The base plan clears break-even at about $58,200 a month, but the cushion is thin. A 15% sales miss, a 5-point margin hit, or a 10% jump in fixed costs can each push the store back into a monthly gap.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$58,200	$0 gap	The plan only breaks even on target.
Revenue shortfall	Sales land 15% below break-even.	$58,200	$7,300 gap	A modest demand miss wipes out the cushion.
Fixed-cost increase	Fixed costs rise 10% to about $53,433 a month.	$64,000	$5,800 gap	Higher overhead lifts the break-even bar fast.
Margin pressure	Variable expenses rise 5 points, cutting contribution margin to 78.5%.	$61,900	$3,700 gap	Shipping subsidies and markdowns eat the margin.
Combined pressure	Sales fall 15%, variable expenses rise 5 points, and fixed costs rise 10%.	$72,800	$14,600 gap	Those hits stack and push break-even out fast.

What should you verify before you commit to bulk inventory, hiring, and paid growth for an online thrift store?

Founder checklist

Before you buy bulk inventory, hire more staff, or scale paid ads, make sure the launch math still works at about $29.10 AOV, 16.5% variable cost, and $36.1K in monthly fixed load. If cash can’t absorb the modeled $138K low point in Month 25, wait.

1Supply Pipeline2,000 orders/mo

Confirm you can source enough sellable goods to support a 2,000 orders/month test, or the photo, grading, listing, packing, and shipping flow will break before warehouse expansion.

2Launch AOV$29.10

Check that the opening product mix and 1.1 units per order really get you to this ticket size, because a lower AOV weakens every unit sold.

3Margin Load83.5%

Keep inventory acquisition, item processing, shipping, and payment fees near 16.5% of revenue, which leaves about 83.5% contribution before fixed costs.

4Fixed Load$36.1K/mo

Check that rent, software, overhead, and Year 1 payroll can be covered before ads scale, because fixed cost is already about $36.1K a month.

5Cash Floor$138K

Hold this much cash through Month 25, because that is the model’s low point before breakeven in Month 26.

6CAC Cap$25 CAC

Keep paid acquisition around the Year 1 CAC and watch repeat buyers, which the model pegs at 20% of new customers with 0.5 orders a month for 6 months.