Fire Partition Installation Break-Even: ~$122K Monthly Revenue

Fixed costs $82.0K/mo Non-variable base

Contribution margin 66% After variable spend

Break-even revenue $125K/mo Monthly target

Break-even timing Month 2 Launch ramp point

Break-even calculator

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

Lean Base Full

Monthly revenue Revenue sets the pool that must cover variable and fixed costs. $ Lower volume Higher volume Variable expenses These are direct costs that rise with each installed partition. $ Lower direct Higher direct

Money available to cover fixed costs $761,950 $1,132,917 revenue - $370,967 variable expenses

Margin ratio

67%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly overhead base profit must cover. $ Lower overhead Higher overhead

Break-even chart Revenue Total costs

Which fire partition installation expenses are fixed, and which move with sales?

Cost classification

Break-even is only useful if fixed overhead stays separate from job-driven spend. In this model, monthly overhead is stable, while materials, labor, commissions, shipping, and usage charges rise as active jobs grow.

Expense	Cost	Break-Even Treatment	Common Mistake
Manufacturing Facility Rent	Fixed	Include the $15,000 monthly rent in fixed overhead before calculating required contribution margin.	Spreading rent across units and hiding the true monthly revenue hurdle.
Certification Maintenance Fees	Fixed	Treat the $2,500 monthly fee as recurring overhead needed to stay qualified for rated work.	Leaving certification upkeep out because initial testing was modeled separately.
Insurance and Liability	Fixed	Carry the $4,200 monthly amount as fixed overhead across the relevant planning range.	Treating required coverage as optional until a large project starts.
Direct Partition Materials and Assembly Labor	Variable	Subtract steel studs, gypsum board, mineral wool, glazing inputs, joint seal inputs, and direct labor per unit before contribution margin.	Treating field labor or rework as fixed when it rises with active jobs.
Sales Commissions	Variable	Model commissions as a revenue-linked charge, starting at 5.0% in the first year.	Using gross revenue for break-even and forgetting commission drag.
Logistics and Shipping	Variable	Model shipping as job-driven spend, starting at 4.0% of revenue in the first year.	Treating mobilization and freight as fixed even when job count grows.
Utility and Power Services plus Energy Consumption	Semi-variable	Use the $3,500 monthly service base, then add energy consumption at 1.0% of revenue.	Putting the full power bill in fixed overhead and understating high-volume usage.
Project Managers and QA Inspectors	Semi-fixed	Add staffing in steps as workload rises; project managers move from 2.0 to 6.0 FTE, and QA inspectors from 1.0 to 2.0 FTE.	Assuming permit-related admin, inspections, and project oversight stay flat at higher volume.

How does break-even change from a lean launch to a full pipeline in fire partition installation?

Scenario table

The lean case barely clears fixed costs, the Year 1 base case has a solid cushion, and the full pipeline case widens that cushion as revenue scales faster than overhead. Job mix still matters because wall systems, glass panels, and joint seals do not carry the same margin.

Planning assumptions only; real results will move with job mix, install complexity, and scheduling.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch validation	$122,000	$40,000	$81,950	67.2%	$50	Near break-even, so small delays can flip profit negative.
Year 1 base case	$625,833	$214,050	$81,950	65.8%	$329,833	Break-even is reached in Month 2, with a workable launch cushion.
Year 5 full pipeline	$1,882,333	$582,716	$138,200	69.0%	$1,161,417	Strong cushion, but margin still depends on job mix and labor load.

What pushes this fire partition installation plan below break-even?

Stress test

The plan breaks first if revenue slips before crews and materials scale cleanly. At $81,950 fixed costs and a 67.1% contribution margin, break-even is about $122,085 a month, so slow starts, rework, or margin squeeze can erase the cushion fast.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change to fixed costs or margin.	$122,085	$0 gap	Any slip below this line turns profit into loss.
Revenue slip	Monthly revenue falls to $100,000.	$122,085	$22,085 gap	That shortfall creates about a $14,800 monthly loss.
Overhead up	Fixed costs rise 15% to about $94,243 a month.	$140,400	$18,315 gap	Higher rent, certification, and payroll need more backlog.
Margin down	Contribution margin drops 5 points to 62.1%.	$132,000	$9,915 gap	Labor overruns, rework, or supplier hikes eat the cushion.
Both pressures	Fixed costs rise 15% and margin drops 5 points.	$151,700	$29,615 gap	Slow starts plus cost creep make break-even much harder.

Can you lock the facility and crew only after the first partition backlog proves the break-even line?

Founder checklist

Don’t sign the lease or add fixed crews until backlog, pricing, and cash all clear the Month 1 load. This model hits breakeven in Month 2, but only if you can support about $122,000 in monthly revenue and fund the first cash gap.

1Launch Demand$122K/mo

Verify signed work and near-term pipeline can hold at least this monthly revenue before you commit to fixed overhead.

2Fixed Load$28.2K/mo

Confirm rent, certification, insurance, software, utilities, and admin stay at this monthly run rate so the break-even target stays real.

3Bid Floor13.0% load

Price jobs from direct unit inputs plus 4.0% factory overhead, 5.0% sales commissions, and 4.0% logistics so each order covers its own cost.

4Lead Times6 inputs

Lock supply timing for steel, gypsum, mineral wool, glazing units, coatings, and joint seal materials before you promise delivery dates.

5Crew Capacity6 FTE

Verify Year 1 staffing can cover 1 General Manager, 2 Project Managers, 1 Fire Safety Engineer, 1 Sales Director, and 1 QA Inspector.

6Cash Cushion$1.025M

Make sure cash can fund the Month 1 minimum and front materials before customer collections start, or the ramp can stall early.