Rotational Molding Break-Even Analysis: About $77K/Month

Fixed costs $53.8K/mo Base overhead

Contribution margin 69.7% After variable costs

Break-even revenue $77.1K/mo Monthly target

Break-even timing Month 2 Early ramp

Break-even calculator

Test how monthly revenue, variable expenses, and fixed costs set the break-even point for a rotational molding plant.

Lean Base Full

Monthly revenue Top line sets the pool that can cover variable and fixed costs. $ Slow month Peak month Variable expenses Direct costs rise with output and cut into contribution margin. $ Tight spend Higher spend

Money available to cover fixed costs $205,389 $265,167 revenue - $59,778 variable expenses

Margin ratio

77%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly overhead the business must cover. $ Lean overhead Heavy overhead

Break-even chart Revenue Total costs

Which rotational molding expenses are fixed, and which move with sales?

Cost classification

With first-year revenue at $3.182 million and break-even in Month 2, cost classification drives whether the target is real. Misclassifying resin, freight, labor, or utilities can make the plant look profitable too early.

Expense	Cost	Break-Even Treatment	Common Mistake
Manufacturing Facility Lease	Fixed	Include the $15,500 monthly lease in fixed overhead from Month 1 through Month 60.	Treating lease dollars as unit-level plant burden instead of a monthly hurdle.
Industrial Utilities Base	Semi-fixed	Model the $2,800 monthly base as stable until plant capacity or operating schedule steps up.	Forgetting that base utilities stay due even when production volume dips.
LLDPE Resin Powder	Variable	Apply the $85.00 per Industrial Chemical Tank directly to each unit produced.	Burying resin usage and scrap inside overhead, which understates unit economics.
Direct Machine Labor	Variable	Use the $42.00 per Industrial Chemical Tank as a unit-level production input.	Treating all labor as fixed and missing the labor load tied to each molding cycle.
Freight Outbound	Variable	Assign the $25.00 per Industrial Chemical Tank to shipped units in break-even math.	Ignoring freight by product size, especially tanks, bins, and playground slides.
Equipment Maintenance Fund	Semi-variable	Use the revenue-linked maintenance percentage as production rises and machines run more cycles.	Modeling maintenance as flat overhead while tooling wear grows with throughput.
Facility Utility Surcharge	Semi-variable	Keep the surcharge tied to revenue or production activity, separate from the base utility bill.	Forgetting utility load during oven cycles and understating energy-sensitive jobs.
CAD Software Subscriptions	Fixed	Include the $950 monthly subscription in fixed overhead across the planning range.	Spreading software across units and hiding the monthly cash commitment.

How does break-even shift between lean, base, and full rotational molding output?

Scenario table

Contribution margin (CM) is what’s left after variable costs. Lean only breaks even, the base case covers fixed costs, and the full case gives the widest cushion; changeovers, batch size, scrap, and mold mix decide how much overhead gets absorbed.

Planning assumptions only; actual break-even will move with batch size, scrap, and product mix.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean break-even case	$77k	$23k	$54k	70%	$0	At the line; any scrap or downtime can push profit negative.
Year 1 base case	$265k	$80k	$54k	70%	$131k	Comfortable cover for overhead, but run length still matters.
Year 5 full-capacity case	$643k	$76k	$80k	88%	$487k	Wide cushion; the plant absorbs overhead if the mold mix stays efficient.

What breaks the break-even cushion for this rotational molding plant?

Stress test

The base plan has a wide cushion: about $265k of monthly revenue versus a $77k break-even point. The real watch item is cash, because the model still needs about $791k of minimum cash in Month 6 if sales slip or margins thin.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$77k	$188k cushion	Strong base cushion, but Month 6 cash still needs close tracking.
Revenue shortfall	Monthly sales fall to $200k.	$77k	$123k cushion	A sales dip still clears break-even, but the cushion narrows fast.
Fixed-cost pressure	Lease, payroll, insurance, software, and base utilities rise 15%.	$89k	$176k cushion	Higher overhead raises the hurdle, so sales growth has less room to miss.
Margin pressure	Variable costs push contribution margin down to 60%.	$90k	$175k cushion	Resin, labor, freight, and utilities can lift break-even fast.
Combined pressure	Sales fall to $200k, fixed costs rise 15%, and margin drops to 60%.	$103k	$97k cushion	Loss of sales and margin cuts the safety net by more than half.

What should you verify before you commit to the plant, machines, and first hires?

Founder checklist

Before you sign the lease or buy equipment, test the plan against the $77K monthly break-even base and the $791K minimum cash needed by Month 6. If the site, supply chain, or hiring plan pushes past that, the plant is not ready yet.

1Plant fit$1.145M

Verify the lease can handle flow, storage, loading, ventilation, and safety before you place the $1.145M equipment and mold stack.

2Fixed load$77K/mo

Check that power, gas, compressed air, water, insurance, software, and admin stay inside the $77K monthly break-even base.

3Margin stack49% EBITDA

Here’s the quick math: Year 1 EBITDA is $1.572M on $3.182M revenue, or about 49%, so lock resin supply and pricing for LLDPE, HDPE, crosslinked polyethylene, recycled blend, and premium LLDPE before you commit.

4Staff ramp4.5 FTE

Staff the Year 1 team at 4.5 FTE first, with a Plant Manager, Design Engineer, Quality Control Lead, Sales Executive, and 0.5 Maintenance Tech, before you add more headcount.

5Launch demand$3.182M Y1

Make sure launch orders can support the Year 1 revenue plan of $3.182M across tanks, dock floats, barriers, feed bins, and slides, because the model reaches break-even in Month 2.

6Cash cushion$791K by M6

Keep at least $791K cash through Month 6, since that is the minimum cash point and it has to absorb the machine, mold, and hiring ramp before payback.