Butterfly Roof Design Break-Even Analysis: $61K Monthly Revenue

Fixed costs $12.0K/mo Studio base

Contribution margin 76.5% After direct costs

Break-even revenue $15.7K/mo Monthly target

Break-even timing Month 7 Launch crossover

Break-even calculator

Test how monthly revenue, variable expenses, and fixed costs push this design service to break-even.

Lean Base Full

Monthly revenue Revenue is the pool that covers direct work and fixed overhead. $ Low revenue High revenue Variable expenses Include project engineering, rendering, travel, and print costs. $ Low costs High costs

Money available to cover fixed costs $161,094 $203,917 revenue - $42,823 variable expenses

Margin ratio

79%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly overhead that break-even has to absorb. $ Light overhead Heavy overhead

Break-even chart Revenue Total costs

Which expenses are fixed, and which move with sales for this roof design service?

Cost classification

Mislabeling verification, travel, or materials as fixed makes break-even look safer than it is. Keep recurring overhead in monthly fixed costs, variable percentages in contribution margin, and capex out of operating break-even.

Expense	Cost	Break-Even Treatment	Common Mistake
Studio Rent	Fixed	Include $6,500 per month in fixed overhead.	Tying rent to project count.
Software Subscriptions	Fixed	Include $1,800 per month unless seat count rises.	Modeling it as a revenue percentage.
Marketing and PR Retainer	Fixed	Include $2,500 per month in fixed overhead.	Mixing the retainer with CAC math.
Utilities and High Speed Web	Semi-variable	Start with the $600 monthly base, then watch usage as workload grows.	Treating all connectivity and usage as flat forever.
Core Design Payroll	Semi-fixed	Model salaries by FTE because staffing steps up by year.	Spreading payroll as a variable percentage of revenue.
External Engineering Verification	Variable	Deduct 12.0% of first-year revenue before contribution margin.	Entering engineering review as a flat monthly consultant fee.
Specialized Rendering Outsourcing	Variable	Deduct 5.0% of first-year revenue before fixed overhead.	Budgeting rendering as fixed even when project volume changes.
Project Specific Travel	Variable	Deduct 4.0% of revenue as project volume rises.	Leaving site travel out of contribution margin.

How does break-even change from lean launch to base and full scale for this roof design service?

Scenario table

Lean is close to break-even, with just $12k of Year 1 EBITDA on $887k of revenue and a Month 7 break-even. Base and full scale add more cushion because revenue grows faster than fixed overhead.

Scenario figures are planning assumptions, not guarantees, so actual break-even can move with staffing, project mix, and pipeline timing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch case	$73.9k	$26.3k	$46.6k	64.4%	$1.0k	Month 7 break-even leaves little room for slippage.
Base growth case	$203.9k	$60.4k	$66.8k	70.4%	$76.8k	Base scale gives a solid cushion if the pipeline stays steady.
Full scale case	$370.9k	$98.5k	$88.9k	73.5%	$183.6k	Full scale has the strongest cushion, but only with a busy team.

What breaks this break-even plan if project flow slows or support costs rise?

Stress test

The first-year plan clears break-even, but the cushion gets thin fast if signed work slows or support costs climb. A 15% revenue drop, a 10% fixed-cost step-up, or a 5-point margin hit all move the floor higher.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$609k	$278k cushion	The base plan clears break-even with room to spare.
Revenue shortfall	Revenue falls 15% from the first-year plan.	$609k	$146k cushion	Signed work still covers costs, but the buffer shrinks fast.
Fixed-cost increase	Fixed overhead rises 10%.	$670k	$217k cushion	Higher rent, software, or insurance pushes break-even up.
Margin pressure	Variable expenses rise from 23.5% to 28.5%.	$652k	$235k cushion	Engineer overruns and rendering spend lift the break-even floor.
Combined pressure	Revenue falls 15%, fixed overhead rises 10%, and variable expenses rise to 28.5%.	$694k	$64k gap	Volume and cost pressure together can push the model below break-even.

Can you prove 5 mixed projects a month before you commit to the studio, hires, and equipment?

Founder checklist

Before you lease or hire, prove the pipeline can sell at least 5 mixed projects a month at Year 1 pricing. At $225 for 120 hours, $185 for 40 hours, and $250 for 25 hours, that mix supports about $73.9k in monthly revenue and keeps the Month 7 break-even plan credible.

1Pipeline Proof5 projects/mo

If you cannot close five mixed projects a month, the Year 1 revenue path to $887k slips and the cash plan breaks.

2Fixed Load$46.6K/mo

Hold fixed monthly commitments near $46.6k, including rent, software, insurance, utilities, marketing, IT, and payroll, until demand is repeatable.

3Margin Mix76.5% CM

Keep direct variable cost near 23.5% of revenue so each project leaves 76.5% to cover the fixed base and still support break-even.

4Seat RampMonth 13

Do not add the Junior Architect before the pipeline can carry the extra salary; that seat starts in Month 13 and the other technical roles also ramp later.

5Cash Floor$709K

Keep the $709k minimum cash cushion in view, because cash bottoms in Month 7 and the early capex stack lands before revenue fully builds.

6Revision Cap2 rounds

Cap proposal revisions at two rounds so the 120-hour design, 40-hour project management, and 25-hour feasibility plan stays intact and free rework does not eat margin.