Computer Accessory Retail Break-Even Analysis: $256K/Month

Fixed costs $20.9K Monthly base cost

Contribution margin 81.5% After variable costs

Break-even revenue $25.6K Monthly revenue target

Break-even timing Month 26 Model crosses over

Break-even calculator

Test monthly revenue against variable costs and fixed overhead for a computer accessory retailer.

Lean Base Full

Monthly revenue Revenue is the top line that has to cover direct costs and overhead. $ Low sales High sales Variable expenses Direct costs like inventory purchases and shipping rise with each sale. $ Low costs High costs

Money available to cover fixed costs $60,418 $71,500 revenue - $11,082 variable expenses

Margin ratio

84%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly cost base your margin has to absorb. $ Light overhead Heavy overhead

Break-even chart Revenue Total costs

Which computer accessory retail expenses are fixed, variable, or step up with sales?

Cost classification

Your break-even model only works if warehouse overhead, inventory flow, shipping, and staffing are classified separately. In the first year, inventory runs at 14.5% of revenue and shipping at 4.0%, so treating them as fixed would understate volume risk.

Expense	Cost	Break-Even Treatment	Common Mistake
Warehouse Rent	Fixed	Include the $1,500 monthly rent in fixed overhead from Month 1 through Month 60.	Spreading rent across units and making margin look weaker at low sales volume.
Utilities	Semi-variable	Model the $250 monthly base amount, then review usage if warehouse activity rises.	Treating the full utility bill as fixed when packing, lighting, and equipment use can move with order flow.
Business Insurance	Fixed	Include the $180 monthly premium as fixed overhead for the planning range.	Linking insurance to each order even though the model shows a stable monthly amount.
E-commerce Platform Fees	Fixed	Use the $120 monthly platform fee as fixed overhead before contribution margin.	Mixing the monthly platform subscription with order-based merchant fees.
Accounting and Legal	Semi-fixed	Start with the $250 monthly amount, but step it up when transaction volume or compliance work expands.	Assuming professional fees rise smoothly with sales instead of in service-level steps.
Inventory Purchases	Variable	Treat inventory as a revenue-linked expense at 14.5% of first-year revenue, improving to 10.5% by the fifth year.	Classifying inventory purchases as fixed overhead and hiding the true gross margin driver.
Shipping and Fulfillment	Variable	Apply shipping and fulfillment at 4.0% of first-year revenue, falling to 2.0% by the fifth year.	Forgetting that fulfillment moves with orders, returns, packaging, and shipment volume.
Customer Support Specialist wages	Semi-fixed	Model wages as a staffing step: 0.5 full-time equivalent in the first year and 1.0 from the second year onward.	Treating support payroll as purely variable instead of adding headcount when order load needs it.

How does break-even shift from a lean online-first launch to a full-scale retail operation?

Scenario table

Lean is below break-even because fixed costs outrun a small Year 1 sales base. By Year 3, the model is in profit and already past Month 26 break-even, while Year 5 adds a much larger cushion.

Planning assumptions only, not a guarantee of future results.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean online-first Year 1	$5.6K	$1.0K	$20.9K	81.5%	$-16.3K	Still below break-even; fixed costs stay too high.
Scaled omnichannel Year 3	$71.5K	$11.1K	$34.5K	84.5%	$25.9K	Break-even is reached in Month 26, with a modest cushion.
Full-scale Year 5 growth	$394.8K	$49.4K	$36.4K	87.5%	$309.1K	Wide cushion; scale works if traffic and stock stay strong.

What breaks this accessory retailer’s break-even plan?

Stress test

Base break-even sits near $256K a month, built on about $209K of fixed costs and an 81.5% contribution margin. If traffic slips, cable markdowns rise, or rent and payroll creep up before Month 26, the cushion disappears fast.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change from the base case.	$256K	$0 gap	Any delay before Month 26 extends losses.
Revenue shortfall	Monthly revenue runs 10% below plan at about $231K.	$256K	$21K gap	Lower traffic or conversion removes the cushion fast.
Fixed-cost pressure	Fixed costs rise 10% from rent or payroll creep.	$282K	$26K gap	Added overhead before Month 26 widens the hole.
Margin pressure	Shipping and fulfillment rise 5 points.	$273K	$17K gap	Markdowns, returns, or shipping friction hit profit fast.
Combined pressure	Revenue is 10% below plan and fixed costs are 10% higher.	$282K	$53K gap	Weak traffic plus higher overhead leaves no cushion.

What should you verify before signing the lease, hiring the team, and funding inventory for a computer accessory store?

Founder checklist

Use this as a hard go/no-go screen. If traffic, margin, and cash cannot clear the Year 1 model, do not sign the lease, hire staff, or buy inventory yet.

1Traffic Proof5,820 visits/wk

Verify Year 1 traffic can convert at 1.8% into about 105 new buyers a week before you scale ads.

2Overhead Load$20.9K/mo

Keep rent near $1,500 a month and total Year 1 fixed overhead near plan, because higher rent or payroll pushes break-even out fast.

3Margin Check81.5% CM

Hold inventory purchases near 14.5% of sales and shipping at 4.0%; that leaves about 81.5% contribution margin before fixed costs.

4Supplier Terms14.5%

Lock supplier pricing so inventory stays near the 14.5% purchase rate, because even a small cost drift can erase the break-even cushion.

5Team Ramp3.0 FTE

Only commit to the CEO, fulfillment, marketing, and support load when order volume can carry about 3.0 full-time roles in Year 1.

6Cash Cushion$415K / Month 26

Fund the $98K launch build and keep runway through the Month 26 cash trough, when minimum cash peaks at about $415K.