Natural Stone Manufacturing Break-Even: $61K Monthly Revenue

Fixed costs $47.9K Lease and payroll

Contribution margin 78.5% After variable costs

Break-even revenue $61.0K Monthly target

Break-even timing Month 1 Launch month

Break-even calculator

Use this to test monthly revenue, variable expenses, and fixed costs against break-even.

Lean Base Full

Monthly revenue Use your total monthly sales here. More revenue gives you more room to cover fixed costs. $ Low sales High sales Variable expenses Enter direct costs that rise with output, like stone, labor, finishing, and freight. $ Low direct High direct

Money available to cover fixed costs $931,629 $1,104,750 revenue - $173,121 variable expenses

Margin ratio

84%

Covers fixed costs

Yes

Fixed monthly costs Enter the monthly overhead the plant must cover before profit starts. $ Lean overhead Heavy overhead

Break-even chart Revenue Total costs

Which stone manufacturing expenses stay fixed, and which move with production volume?

Cost classification

Break-even only works if each expense behaves the way the model says it does. Treat launch payroll, facility commitments, and machine obligations as real monthly load, while unit inputs and selling fees move with volume.

Expense	Cost	Break-Even Treatment	Common Mistake
Facility Lease	Fixed	Include $12,000 per month from Month 1 through Month 60 before calculating contribution needed to break even.	Treating rent as flexible when the shop must pay it even during slow production months.
Business Insurance	Fixed	Include $1,500 per month as a stable operating expense across the planning range.	Dropping insurance from break-even because it is not tied to a countertop, tile, slab, top, or paver unit.
Office Supplies & Software	Fixed	Include $800 per month as recurring overhead needed to run sales, admin, and production tracking.	Modeling small overhead lines as optional, then overstating early break-even cushion.
Launch Salaried Team	Fixed	Include the General Manager, Lead Fabricator, Sales Manager, and Administrative Assistant as fixed payroll, totaling $325,000 annually in the first operating year.	Treating salaried headcount as variable labor when these roles start before sales fully catch up.
Raw Stone Block Cost	Variable	Apply per-unit COGS by product, such as $150 per countertop, $250 per wall slab, $60 per vanity top, $1 per floor tile, and $0.80 per paver.	Using one blended material rate and missing margin differences across large slabs and smaller unit products.
Sales Commissions	Variable	Apply as a revenue-linked selling expense: 3.0% in the first year, then lower rates through the mature year.	Putting commissions in fixed overhead, which hides the true contribution margin on each sale.
Utilities	Semi-variable	Start with the $3,500 monthly utility line, then watch usage as saws, polishing, water handling, and shop hours rise.	Assuming utilities stay flat when higher production can push power and water use above the base run rate.
Equipment Maintenance	Semi-variable	Model the usage-linked maintenance percentages by product, generally 0.3% to 0.4% of revenue, as production hours increase.	Ignoring machine wear until repairs hit cash flow, especially when volume ramps faster than maintenance planning.

How does break-even change across lean, base, and full production?

Scenario table

Break-even climbs as volume and staffing rise, but the contribution margin stays near 78% to 79%. The real test is signed demand, since capacity alone does not cover fixed payroll, lease, and showroom costs.

Planning assumptions only. Real results can move with product mix, yield, and staffing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean stone shop	$480k	$105k	$48k	78.1%	$327k	Revenue is well above break-even, so the cushion is solid.
Base stone shop	$745k	$160k	$57k	78.6%	$529k	Still above break-even, but added staff lifts the monthly floor.
Full stone shop	$1.105M	$230k	$63k	79.2%	$812k	Strongest cushion here, if signed demand matches output.

What breaks the break-even plan for natural stone manufacturing?

Stress test

The base plan already needs about $613k in monthly revenue to break even, while the forecast starts near $480k. A 10% sales miss, higher fixed overhead, or margin slip to 75% widens the gap fast.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$613k	$133k gap	At $480k monthly revenue, the plan is still below break-even.
Revenue shortfall	Monthly revenue falls 10% to about $432k.	$613k	$181k gap	A smaller top line eats cushion before costs move.
Fixed-cost pressure	Annual fixed overhead rises by $10k.	$626k	$146k gap	Lease, labor, or admin creep lifts the bar.
Margin pressure	Contribution margin falls from 78.1% to 75.0%.	$638k	$158k gap	More waste, rework, freight, or overtime pushes margin down.
Combined pressure	Monthly revenue falls 10% and margin slips to 75.0%.	$638k	$206k gap	Slow countertop installs and idle saw time can stack pressure fast.

What should a natural stone founder verify before signing the lease and ordering equipment?

Founder checklist

Before you sign the lease or order the saws, make sure Month 1 demand can carry the $20.8K monthly overhead, the $510K capex plan, and the first-year payroll of $325K. If countertops and wall slabs do not have real order coverage, break-even will look cleaner than cash flow.

1Core demand$4.64M Y1

Check that countertop and wall slab orders are real, since those two lines drive about $4.64M of the $5.76M first-year revenue.

2Fixed load$20.8K/mo

Confirm the lease math before you commit, because rent, utilities, insurance, software, marketing, and professional fees create a $20.8K monthly fixed burn.

3Unit margin82%-85% CM

Price raw stone, freight in, finishing materials, packaging, labor, and variable shop costs by product line so the contribution margin stays in range.

4Payroll ramp$325K Y1

Do not add the Month 13 production assistant and showroom sales associate until order volume can support the first-year fixed payroll of $325K.

5Cash cushion$1.079M

Hold at least the Month 1 cash trough in reserve, because the model's minimum cash is $1.079M before receipts catch up.

6Capex timing$510K

Stage the $510K of equipment, build-out, truck, inventory, and IT spend across Month 1 to Month 6 so the plant opens without a cash cliff.