Mobile Phone Store Break-Even Analysis: Month 29 Profit Threshold

Fixed costs $20.6K/mo Month 1 base

Contribution margin 88% After variable costs

Break-even revenue $23.5K/mo Covering costs

Break-even timing Month 29 Model crossing point

Break-even calculator

Test monthly sales, variable costs, and fixed overhead against break-even for a mobile phone store.

Lean Base Full

Monthly revenue Revenue sets how much margin is left to cover fixed costs. $ Low sales High sales Variable expenses These rise with sales, like sales commissions and payment fees. $ Low costs High costs

Money available to cover fixed costs $24,100 $26,000 revenue - $1,900 variable expenses

Margin ratio

93%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly cost base your contribution margin must cover. $ Light overhead Heavy overhead

Break-even chart Revenue Total costs

Which mobile phone store expenses are fixed, and which move with sales?

Cost classification

Break-even gets cleaner when fixed overhead, unit-linked costs, and staffing steps are separated. In this model, the store reaches break-even in Month 29, so small classification errors can shift that date fast.

Expense	Cost	Break-Even Treatment	Common Mistake
Commercial Lease	Fixed	Include in monthly overhead at $4,500 from Month 1 through Month 60.	Ignoring lease escalators.
Store Payroll	Semi-fixed	Changes when staffing steps up; first-year scheduled wages are about $13,542/month.	Hiring before traffic proves out.
Wholesale Cost Phones	Variable	Moves with phone sales volume; modeled at 8.0% in the first year.	Treating inventory buys as profit.
Wholesale Cost Accessories	Variable	Tied to accessory volume; modeled at 4.0% in the first year.	Underpricing bundles.
Sales Commissions	Variable	Deduct from each sale; modeled at 5.0% in the first year.	Forgetting commission drag.
Payment Processing Fees	Variable	Deduct from card sales; modeled at 1.5% in the first year.	Missing card fees.
Utilities	Semi-variable	Model the $600/month base, then watch usage as store traffic rises.	Assuming no seasonal lift.
Insurance	Fixed	Include in monthly overhead at $250 from Month 1 through Month 60.	Leaving theft exposure underinsured.

How does break-even shift as this mobile phone store moves from lean to full-service?

Scenario table

More traffic, higher conversion, and a wider product mix lift revenue fast, but fixed costs also climb. The base case reaches the model’s break-even point in Month 29, while lean and full formats change the cash cushion.

Scenario figures use modeled traffic, conversion, repeat orders, units per order, and sales mix; they are planning assumptions, not guarantees.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch store	$297k	$54.9k	$206k	81.5%	$36.1k	Above break-even, but cushion is modest.
Base storefront	$1.11m	$186.6k	$275k	83.2%	$649.4k	Model reaches break-even in Month 29, with room to absorb fixed costs.
Full-service store	$2.20m	$330.6k	$329k	85.0%	$1.54m	Strong revenue and margin create a wide break-even cushion.

What breaks the break-even plan for a mobile phone store?

Stress test

This store breaks fast if foot traffic slips, fees rise, or payroll drifts up. Year 1 only clears about $253k in revenue at an 81.5% contribution margin, so a 20% sales dip or a 10% overhead bump pushes it back into a gap.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$253k	$0 cushion	The plan only works if Year 1 sales hit target.
Revenue shortfall	Sales fall 20% to about $203k.	$253k	$41k gap	Lower walk-in traffic and weaker close rates hit cash fast.
Fixed-cost pressure	Fixed overhead rises 10% to about $227k.	$279k	$21k gap	Rent, payroll, or other overhead creep can erase the cushion.
Margin pressure	Contribution margin falls from 81.5% to 76.5%.	$270k	$13k gap	Discounts, shrinkage, returns, or higher card fees squeeze margin.
Combined pressure	Sales fall 20%, overhead rises, and margin drops to 76.5%.	$297k	$72k gap	That mix turns a small miss into a deep monthly cash hole.

What should you verify before signing the lease for this mobile phone store?

Founder checklist

Do not sign the lease until local traffic, product mix, and cash can carry the store past Month 29. The model loses $207K in Year 1 and $138K in Year 2, so launch funding has to cover the ramp, not just the opening day.

1Traffic Proof1,941/mo

Verify the site can draw about 1,941 monthly visitors in Year 1, because that is the traffic base behind the 3.0% buyer conversion model.

2Buyer Rate3.0%

Test the 3.0% visitor-to-buyer rate with real walk-ins, because a smaller close rate cuts orders fast and pushes break-even out.

3Contribution86% CM

Verify vendor terms and category mix before stocking high-ticket phones, because the model’s contribution margin lands near 86% before rent and payroll.

4Fixed Load$20.6K/mo

Check that lease, utilities, software, and the Year 1 team stay near $20.6K a month, because that is the cash burn before inventory moves.

5Cash Cushion$429K

Fund enough reserve to absorb the Month 35 low point, because minimum cash falls to $429K and EBITDA stays negative through Year 2.

6Hire Ramp3.5 FTE

Keep the launch team at 3.5 FTE, lock security and repair workflow, and add the repair tech only when sales justify the next step, so payroll does not outrun the Month 29 break-even plan.