Contact Lens Retail Store Break-Even Analysis: ~$76K Monthly Sales

Fixed costs $61.4K/mo Monthly base

Contribution margin 81% After variable costs

Break-even revenue $75.8K/mo Revenue needed

Break-even timing Month 14 Launch ramp

Break-even calculator

Test whether monthly revenue covers variable expenses and fixed costs for a contact lens retail store.

Lean Base Full

Monthly revenue Revenue sets the margin available to cover fixed costs each month. $ Low sales High sales Variable expenses Use direct costs that rise with sales, like inventory and fulfillment. $ Low costs High costs

Money available to cover fixed costs $143,022 $174,417 revenue - $31,395 variable expenses

Margin ratio

82%

Covers fixed costs

Yes

Fixed monthly costs Use the monthly overhead the store must cover even before sales. $ Light overhead Heavy overhead

Break-even chart Revenue Total costs

Which contact lens retail store expenses are fixed, and which move with sales?

Cost classification

Break-even is only useful if each expense behaves the right way in the model. Inventory and fulfillment should scale with sales, while rent, software, verification, agency fees, insurance, and first-year payroll should sit in monthly overhead.

Expense	Cost	Break-Even Treatment	Common Mistake
Wholesale Inventory Procurement	Variable	Model at 11.5% of first-year revenue, falling to 9.5% by the mature year.	Treating inventory buys as fixed overhead instead of a percentage of sales.
Fulfillment and Logistics	Variable	Model at 7.5% of first-year revenue, falling to 5.5% by the mature year as scale improves.	Holding shipping and handling flat while orders rise.
Warehouse Lease	Fixed	Include $5,500 per month in fixed overhead from Month 1 through Month 60.	Spreading lease expense per order and hiding the real monthly burn.
E-commerce Platform Hosting	Fixed	Include $2,500 per month in fixed overhead during the break-even period.	Linking hosting to revenue without a usage-based charge in the model.
Prescription Verification Service	Fixed	Include $1,200 per month as recurring operating overhead.	Leaving verification out because it feels small; it still raises the revenue hurdle.
Digital Marketing Agency Fee	Fixed	Include $8,000 per month as fixed overhead before calculating required gross profit.	Treating the agency fee like ad spend that flexes with each sale.
First-Year Payroll	Fixed	Use about $42,083 per month: $505,000 annual salary divided by 12 months.	Using only hourly labor logic and missing the base team needed to operate.
Added Customer Support Headcount	Semi-fixed	Increase in steps as support staffing rises from 2.0 FTE in the first year to 12.0 FTE by Year 5.	Scaling support perfectly with revenue instead of adding staff in hiring blocks.

How does break-even change from a lean launch to a fuller contact lens store?

Scenario table

Break-even shifts quickly as the store adds repeat orders, staff, and fulfillment load. The lean setup stays far from break-even; the base case clears it; the full build-out has the widest cushion but the most fixed-cost pressure.

Planning figures only; real results will move with traffic, conversion, product mix, and staffing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch	$44.2K	$8.4K	$67.9K	81%	-$32.2K	Still short of break-even by about $39.7K per month, so demand proof matters.
Base store	$174.4K	$31.4K	$73.8K	82%	$69.2K	Above break-even by about $84.5K per month, but repeat orders must stay steady.
Full build-out	$679.3K	$115.5K	$88.4K	83%	$475.3K	Far above break-even by about $572.7K per month, but staffing and fulfillment control matter.

What breaks the break-even plan for a contact lens store?

Stress test

This store is closest to break-even at about $758K a month. A 10% sales drop, a 10% rise in fixed overhead, or a 3-point hit to contribution margin, meaning profit left after variable costs, can push it into a monthly loss.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$758K	$0 cushion	The store only just covers fixed costs.
Revenue shortfall	Revenue falls 10% to $682K a month.	$758K	$61K gap	A small sales miss creates a meaningful monthly gap.
Fixed-cost pressure	Fixed overhead rises 10% to $675K a month.	$833K	$75K gap	Higher overhead quickly eats the cushion.
Margin pressure	Variable expenses rise from 19.0% to 22.0%.	$787K	$29K gap	Fee or freight creep pushes break-even higher.
Combined pressure	Revenue falls to $682K, fixed overhead rises to $675K, and contribution margin drops to 78.0%.	$865K	$143K gap	Stacked pressure leaves the plan well below break-even.

Can this contact lens store prove demand, margin, and cash before it signs the lease and buys inventory?

Founder checklist

Don’t lock in the warehouse or stock the first big order until demand, supplier terms, and cash all match the model. In Year 1, fixed operating cost is about $61.4K a month before inventory and fulfillment, so the break-even test has to hold up early.

1Demand Proof2.5% CVR

Confirm local and online traffic can hold the Year 1 visitor-to-buyer rate before you sign the lease, because weak conversion leaves the store with rent but not enough orders.

2Fixed Load$61.4K/mo

Add the $5.5K warehouse lease, $8K marketing fee, and Year 1 payroll before you commit, and keep the $240K of one-time capex out of break-even math.

3Margin Stack81% CM

Confirm wholesale inventory at 11.5% and fulfillment at 7.5% of sales, so contribution margin (sales left after direct costs) stays near 81% before overhead.

4Verification Flow$1.2K/mo

Test the prescription verification workflow before launch, because the monthly service only helps if orders clear fast enough to ship without backlog.

5Repeat Capacity35% / 12 mo

Make sure support and replenishment can handle repeat buyers equal to 35% of new customers over a 12-month lifetime, since repeat orders carry the later-year ramp.

6Cash and Payroll$334K / 5 FTE

Keep at least the $334K cash cushion through Month 13 and hold the team at the Year 1 5 FTE plan until sales can absorb the $505K wage base.