Structural Insulated Panel Manufacturing Break-Even: About $89K/Month

Fixed costs $63.6K/mo Monthly run rate

Contribution margin 72.8% After variable costs

Break-even revenue $87.3K/mo Monthly threshold

Break-even timing Month 1 Launch month

Break-even calculator

Use this calculator to test monthly revenue, variable expenses, and fixed monthly costs against break-even for structural insulated panel manufacturing.

Lean Base Full

Monthly revenue Revenue is the cash coming in before direct costs and overhead. $ Lower sales Higher sales Variable expenses These rise with output: materials, freight, and commissions. $ Lower cost Higher cost

Money available to cover fixed costs $608,849 $748,417 revenue - $139,568 variable expenses

Margin ratio

81%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly cost base your margin has to cover. $ Lean overhead Higher overhead

Break-even chart Revenue Total costs

Which panel manufacturing expenses are fixed, and which move with sales?

Cost classification

Break-even is reliable only when fixed overhead, unit materials, and volume-linked fees sit in the right buckets. Treat the $720,000 equipment spend as capital spending, not a monthly break-even expense.

Expense	Cost	Break-Even Treatment	Common Mistake
Manufacturing Facility Lease	Fixed	Use the $12,000 monthly lease in fixed overhead for Month 1 through Month 60.	Allocating rent per panel and hiding the true monthly nut.
Facility Utilities and Power	Semi-variable	Keep the base $3,500 monthly charge in overhead, but flex usage with production load.	Treating all power as fixed even when presses and routing hours rise.
OSB Sheathing Sheets	Variable	Include per-unit sheet usage in direct production expense; for a standard wall panel, the input is $25 per unit.	Using one blended material rate across panels with different builds.
EPS Insulation Foam	Variable	Apply the per-unit foam amount by product; standard wall panels use $15 per unit and roof panels use $25 per unit.	Forgetting that roof panels carry higher foam content.
Industrial Adhesive	Variable	Model adhesive by unit produced, from $1 per spline to $7 per roof panel.	Parking adhesive in overhead instead of unit margin.
Equipment Maintenance	Semi-variable	Use the 1.5% of revenue assumption as production-linked maintenance in the contribution margin math.	Counting maintenance as fully fixed while machine wear scales with output.
Outbound Logistics and Freight	Variable	Apply 5.0% of first-year revenue; on $6.425 million, that is about $321,250.	Leaving freight below the break-even line and overstating margin.
Sales Commissions	Variable	Apply 3.0% of first-year revenue; on $6.425 million, that is about $192,750.	Treating commissions like salary instead of tying them to sales volume.

How does break-even shift from lean to base to full SIP plant output?

Scenario table

Break-even moves because revenue, variable cost, and payroll scale at different speeds. CM, or contribution margin, stays solid, but the cushion depends on panel mix and how fast orders fill the plant.

Planning figures only; actual break-even will move with mix, freight, labor, and plant throughput.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean start-up plant	$89K	$25K	$64K	72%	$0K	Contribution just covers overhead, so one soft month can turn negative.
Year 1 base plant	$535K	$151K	$64K	72%	$321K	Monthly contribution clears fixed costs, so the model is past break-even.
Year 5 full-output plant	$1.58M	$398K	$105K	75%	$1.08M	Fixed payroll rises, but the cushion stays wide, so mix control matters most.

What breaks the SIP plant’s break-even plan first?

Stress test

The plant still clears break-even in the base case, with about $535K monthly revenue against about $89K break-even revenue. The real risk is margin squeeze from OSB and EPS inflation, scrap, rework, overtime, and freight above the Year 1 assumption.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$89K	$446K cushion	Large cushion at launch.
Revenue shortfall	Monthly revenue falls 20% to about $428K.	$89K	$339K cushion	Still above break-even, but cushion shrinks.
Fixed-cost pressure	Monthly fixed costs rise 20% to about $763K.	$106K	$429K cushion	Lease, utilities, and labor growth eat cushion fast.
Margin pressure	Contribution margin falls 10 points to about 618%.	$103K	$432K cushion	OSB, EPS, scrap, and freight can squeeze margin.
Combined pressure	Revenue falls 20%, fixed costs rise 20%, and contribution margin falls 10 points.	$124K	$304K cushion	Still clears break-even, but headroom drops hard.

Can this SIP plant clear break-even before you lock the lease and buy the press?

Founder checklist

Before you lock the lease and press order, prove the plant can carry its fixed load and keep the $1.109M cash floor intact. The model shows breakeven in Month 1, so the real test is whether backlog, margin, and staffing already match the first-year ramp.

1Backlog proof$89K/mo

Verify quoted backlog can clear about $89K in monthly revenue before you add the $5K trade-show budget, because launch spend only helps if orders are already near break-even.

2Fixed load$763K/yr

Check that the lease, utilities, insurance, software, marketing, accounting, and the $445K first-year salary base stay covered by the fixed load before you commit to the plant.

3Contribution margin80.8% CM

Here’s the quick math: Year 1 unit inputs total $719.5K, freight runs 5.0%, and sales commission runs 3.0%, so each dollar of revenue still leaves about 80.8% before fixed costs.

4Press timing$430K capex

Confirm the $250K lamination press and $180K CNC center line up with real order timing, so you do not sink cash into equipment before demand can use it.

5Staffing ramp6.0 FTE

Map output to the opening 6.0 FTE and the $445K first-year salary base, then add people only when monthly panel volume forces it.

6Cash floor$1.109M

Keep the Month 1 minimum cash need in view, because the build starts with the tightest cash point and any slip in utilities, freight, or quality control can push you below it.