Prefabricated Home Break-Even Analysis: $115K Monthly Revenue

Fixed costs $90.2K/mo Month 1 base

Contribution margin 79% After variable costs

Break-even revenue $114K/mo Monthly target

Break-even timing Month 1 Launch month

Break-even calculator

Test how monthly revenue, variable expenses, and fixed costs shape break-even for prefabricated modular home construction.

Lean Base Full

Monthly revenue Revenue sets the cash pool that must cover direct costs and overhead. $ Slow launch Strong sales Variable expenses Direct build, logistics, sales, and marketing costs that rise with revenue. $ Light build Heavy build

Money available to cover fixed costs $2,854,750 $3,585,833 revenue - $731,083 variable expenses

Margin ratio

80%

Covers fixed costs

Yes

Fixed monthly costs Monthly overhead stays on even when sales slow. $ Lean overhead Heavy overhead

Break-even chart Revenue Total costs

Which prefab home expenses stay fixed, and which move with sales volume?

Cost classification

Break-even only works if fixed overhead stays separate from per-home build and install inputs. Misclassify factory costs or commissions, and Month 1 break-even can look cleaner than the cash reality.

Expense	Cost	Break-Even Treatment	Common Mistake
Factory Lease	Fixed	Include $25,000 per month in fixed overhead from Month 1 through Month 60.	Spreading rent across homes and making unit margin look lower than it is.
Insurance and Liability	Fixed	Include $4,500 per month as base overhead regardless of homes produced.	Linking insurance directly to unit volume without a stated usage driver.
Utilities and Security	Semi-variable	Start with the $3,800 monthly base, then test higher factory hours as production scales.	Treating all utilities as fixed while output rises from 30 homes in the first year to 150 homes in Year 5.
R and D Materials	Semi-fixed	Model $5,000 per month until design capacity or product testing needs step up.	Loading prototype spend into each home instead of treating it as a capacity-related monthly outlay.
Salaried operating team	Semi-fixed	Use planned full-time equivalent staffing by year; first-year salaries total $560,000 before later hiring steps.	Assuming payroll rises smoothly with every unit instead of jumping when new managers or coordinators are hired.
Per-home build and install inputs	Variable	Apply lumber and steel, insulation and glass, direct factory labor, modular logistics, and onsite installation per home type.	Averaging Studio and Estate inputs too early and losing the impact of product mix.
Revenue-linked selling spend	Variable	Apply sales commissions at 2.5% of revenue and digital marketing at 3.0% in Year 1, falling to 1.5% by Year 5.	Putting commissions or marketing into fixed overhead when they move with sales.
Factory support expense	Semi-variable	Model factory overhead, indirect labor, maintenance, quality control, and waste management as 4.0% of revenue in total.	Treating the full factory support load as fixed and overstating the units needed to break even.

How does break-even shift from a lean launch to full scale in modular home production?

Scenario table

CM means contribution margin, the revenue left after variable costs. As volume rises from lean to full, fixed overhead is spread across more homes, so break-even gets easier.

Planning cases only; actual break-even moves with pricing, mix, labor, and ramp speed.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch, Year 1	$1.127M	$243K	$98K	78.5%	$786K	Above break-even, but the cushion is still tied to steady factory use.
Base case, Year 3	$3.586M	$723K	$129K	79.8%	$2.733M	Break-even is comfortably covered, with better overhead absorption.
Full scale, Year 5	$6.340M	$1.216M	$170K	80.8%	$4.954M	Strongest cushion, but demand still has to hold for scale to work.

What breaks the break-even plan if permits slip, costs run hot, or factory time goes unused?

Stress test

Year 1 has a wide cushion over bare break-even, but it depends on steady sales conversion and clean installs. The main risks are delayed permits, rework, freight spikes, and crews or factory labor sitting idle.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$115,000	$1,012,000 cushion	Cash flow clears break-even in Month 1.
Revenue shortfall	Monthly installed sales and backlog conversion fall 10%.	$115,000	$899,000 cushion	Slower permits or close rates leave less room for idle labor.
Fixed-cost pressure	Lease, insurance, software, utilities, professional services, and payroll rise 20%.	$138,000	$989,000 cushion	Overhead creep raises the break-even line.
Margin pressure	Lumber, steel, insulation, glass, logistics, onsite installation, commissions, and marketing rise 10%.	$117,000	$1,010,000 cushion	Freight spikes and rework compress contribution margin.
Combined pressure	Installed sales fall 15%, fixed costs rise 20%, and variable costs rise 10%.	$149,000	$808,000 cushion	Delayed permits, unused capacity, and crews waiting on sites cut coverage fastest.

What should you verify before you lock in the factory and build-out?

Founder checklist

The model breaks even in Month 1, but only if the opening backlog, crew plan, and capex are real. Check the demand, margin, cash, and build-out math before you sign any big commitment.

1Backlog Cover30 homes

Confirm signed orders cover the 30-home Year 1 plan before you lock in fixed costs, because break-even only works on booked demand.

2Unit Mix5 models

Verify the backlog is split across Studio, Cabin, Family, Villa, and Estate, since the mix drives revenue, material buys, and cash timing.

3Unit Margin79% CM

Test supplier quotes for lumber, steel, insulation, glass, and logistics against the model's cost stack so direct build costs do not eat margin.

4Crew Ramp6 FTE

Keep Year 1 staffing at 6 FTE and tie any installer hires to signed homes, because pulling crews forward can break the launch plan.

5Overhead Burn$90.2K/mo

Make sure the factory lease, insurance, software, utilities, R and D materials, and professional services fit inside this monthly burn before owner pay or debt service.

6Cash Need$1.141M

Keep this cash in Month 1 and stage the $450K assembly line, $120K cutters, $85K crane, $220K fleet, $350K model home, $65K IT, and $45K racking so build-out does not outrun sales.