Break-Even Point For Mirror Manufacturing: $84K/Month

Fixed costs $66.1K/mo Payroll and overhead

Contribution margin 71% After variable costs

Break-even revenue $93.5K/mo Monthly revenue target

Break-even timing Month 2 Model break-even

Break-even calculator

Enter monthly revenue, variable expenses, and fixed costs to see if the business clears break-even.

Lean Base Full

Monthly revenue Use the monthly top line; it funds all variable and fixed costs. $ Lower sales Higher sales Variable expenses These rise with each mirror sold, including materials, shipping, and sales commissions. $ Lower costs Higher costs

Money available to cover fixed costs $139,637 $173,458 revenue - $33,821 variable expenses

Margin ratio

81%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly cost base the margin must cover. $ Lean base Heavy base

Break-even chart Revenue Total costs

Which expenses are fixed, and which move with mirror sales?

Cost classification

Break-even only works if fixed overhead stays separate from unit-driven spend. Here, $15,000/month factory rent and utilities sits in the fixed base, while materials, shipping, and commissions move with units or revenue.

Expense	Cost	Break-Even Treatment	Common Mistake
Mirror glass material	Variable	Model per unit produced, from $5 for a classic wall mirror to $20 for a smart LED mirror.	Blending glass into factory overhead and hiding true unit margin.
Mirror frame material	Variable	Model per unit produced, from $3 for a classic wall mirror to $10 for a smart LED mirror.	Using one average frame amount across products with different builds.
Direct labor	Variable	Treat production labor as unit-driven, from $2 to $5 per mirror based on product type.	Mixing direct labor with salaried management payroll.
Shipping & Logistics	Variable	Apply as a revenue percentage, starting at 7.0% in the first year and falling to 5.0% by the mature year.	Forgetting freight improves as volume and routing density rise.
Sales Commissions	Variable	Apply as a revenue percentage, starting at 3.0% in the first year and falling to 2.0% by the mature year.	Counting commissions as fixed payroll instead of sales-linked spend.
Factory Rent & Utilities	Fixed	Include $15,000/month in fixed overhead for the relevant monthly planning range.	Treating the full factory bill as variable with each order.
Factory utilities in COGS	Semi-variable	Keep the base facility charge in fixed overhead and model the revenue-linked portion at 0.5% of product revenue.	Putting all utilities in one bucket instead of splitting base and usage.
Customer Service Representative payroll	Semi-fixed	Model staffing in steps as volume rises, from 1.0 FTE in the first year to 2.0 FTE from the third year.	Assuming support payroll rises smoothly with every mirror sold.

How does break-even move from a lean mirror run to a full production mix?

Scenario table

Break-even improves as higher-priced mirrors spread fixed payroll and factory costs over a larger revenue base. Year 1 is the tightest case, while Year 3 and Year 5 leave more monthly cushion.

Planning assumptions only; results will move with product mix across wall, vanity, floor, decorative, and LED mirrors.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean Year 1 mix	$112.4k	$23.5k	$66.1k	79.1%	$22.8k	Positive, but the cushion is still thin above break-even.
Base Year 3 mix	$241.8k	$45.9k	$79.5k	81.0%	$116.4k	Solid cushion, though mix swings can still press margin.
Full Year 5 mix	$368.8k	$63.4k	$79.5k	82.8%	$225.9k	Strong cushion; fixed cost absorption is much better here.

What breaks first if mirror sales soften or factory costs rise?

Stress test

The base plan clears break-even by about $28.8k a month, so there is a cushion. But that cushion disappears fast if sales slip 25.6%, fixed overhead jumps by $22.8k, or variable costs rise toward 41.2% of revenue.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$83,600	$28,817 cushion	Healthy, but the cushion is only about $28.8k a month.
Revenue shortfall	Monthly sales fall 25.6% to the break-even line.	$83,600	$0 cushion	Any deeper drop turns profit into loss.
Fixed-cost pressure	Monthly fixed cost rises by $22,800 to $88,933.	$112,417	$0 cushion	All overhead room is gone.
Margin pressure	Variable cost rate rises from 20.9% to 41.2% of revenue.	$112,417	$0 cushion	Higher shipping, scrap, or commissions erase the buffer.
Combined pressure	Sales fall 25.6%, fixed cost rises by $22,800, and variable spend moves to 41.2% of revenue.	$151,200	$38,800 gap	Demand, margin, and overhead all move the wrong way.

What should a mirror manufacturer verify before signing the lease and buying the first production line?

Founder checklist

Don’t sign the lease or place the first big inventory order until the Year 1 5,800-unit plan is backed by real orders. This model carries about $66.1K of monthly fixed load, so the Month 2 break-even and the $887K cash trough only work if demand, margin, and setup timing hold.

1Demand Proof5,800 units

Verify signed orders or channel pull for the Year 1 plan of 5,800 units before you commit to the first $75K raw-material buy, because unsold stock breaks the break-even math.

2Fixed Load$66.1K/mo

Check that the plant can carry $22.8K in monthly non-payroll overhead plus $43.3K in Year 1 payroll, because that fixed load is what the cash runway must absorb.

3Margin Check79.1% CM

Confirm the product mix still clears about 79.1% contribution margin (money left after variable costs) after unit inputs, shipping, and sales commissions, or the break-even date slips.

4Capacity Ramp5.5 FTE

Verify the 5.5 FTE Year 1 team and the $150K glass-cutting plus $80K frame-assembly installs can support output without hiring ahead of throughput.

5Cash Cushion$887K

Hold enough cash for the Month 8 trough; the model's minimum cash is $887K, so capex and inventory can't outrun the ramp.

6Launch TimingMonth 2

Pressure-test whether launch demand lands fast enough to hit Month 2 break-even, because a slow start turns early fixed cost into a drag.