Tensile Structure Break-Even Analysis: $109K Monthly Revenue

Fixed costs $76.0K/mo Fixed monthly base

Contribution margin 70% After variable costs

Break-even revenue $108.6K/mo Monthly target

Break-even timing Month 3 Forecast break-even

Break-even calculator

Test monthly revenue against direct costs and fixed overhead to see where this tensile structure firm breaks even.

Lean Base Full

Monthly revenue Revenue sets the cash left after direct costs to cover fixed overhead. $ Lower rev Higher rev Variable expenses Use direct project costs that move with the work, like fabrication, logistics, and engineering review. $ Lower cost Higher cost

Money available to cover fixed costs $1,004,000 $1,383,000 revenue - $379,000 variable expenses

Margin ratio

73%

Covers fixed costs

Yes

Fixed monthly costs Use the monthly cost base that stays on even when project volume dips. $ Lower fixed Higher fixed

Break-even chart Revenue Total costs

Which expenses are fixed and which move with sales in a tensile structure design and installation firm?

Cost classification

Classifying each expense by behavior keeps the Month 3 break-even test honest. Fixed studio, software, insurance, and payroll need coverage every month; variable materials, logistics, reviews, and travel should rise only when revenue rises.

Expense	Cost	Break-Even Treatment	Common Mistake
Studio and Fabrication Space Rent	Fixed	$12,500/month from Month 1 to Month 60; cover it before counting project-level profit.	Allocating rent only to active projects.
Design and Analysis Software Subscriptions	Fixed	$2,200/month; spread the base charge across all billable design and installation work.	Ignoring software in small design-only bids.
Professional Liability Insurance	Fixed	$3,500/month; treat it as required overhead for architectural and engineering risk coverage.	Treating insurance as optional overhead.
Principal Architect, Senior Structural Engineer, Designer, and Project Manager Payroll	Fixed	First year salary base is $525,000 per year, or about $43,750/month, before added headcount.	Excluding salaried labor from break-even.
Installation Lead	Semi-fixed	$85,000 per year in the first year; add capacity in steps only when backlog supports it.	Hiring before signed installation backlog.
Raw Materials and Fabrication	Variable	Model at 18% of first year revenue, then update by project mix and fabrication scope.	Using one markup for all fabric and steel packages.
Site Logistics and Equipment Rental	Variable	Model at 7% of first year revenue; charge lifts, cranes, freight, and rentals to jobs.	Burying site equipment inside overhead.
Utilities and Communications	Semi-variable	$1,800/month base; separate shop usage from project-linked field power where possible.	Mixing shop usage with field power.

How does break-even change from lean to base to full-capacity work in this business?

Scenario table

Break-even rises with scale because payroll and studio costs are fixed, while the contribution margin improves as the mix shifts toward lower-cost work. Lean is the tightest on hiring; full capacity has the widest cushion, but cash can still lag signed work.

Planning figures only; billing can lag approvals, fabrication, and installation milestones.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean project delivery	$491K	$147K	$76K	70.0%	$268K	Easiest break-even path if hiring stays tight.
Base balanced capacity	$1,383K	$379K	$108K	72.6%	$896K	Balanced mix; keep design, engineering, PM, and install teams loaded.
Full-capacity portfolio	$2,573K	$638K	$145K	75.2%	$1,790K	Strong cushion, but only if large projects keep the pipeline full.

What breaks the break-even plan if approvals slow or costs rise?

Stress test

Base break-even is about $109K a month at a 70% contribution margin and $76K of fixed costs. A 20% revenue drop, a 15% jump in overhead, or a 5-point margin squeeze can push the model into a monthly loss.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$109K/month	$382K cushion	Strong buffer if project flow holds.
Revenue shortfall	Monthly revenue falls 20% at break-even.	$109K/month	$15K gap	Slow approvals or weather can flip the month red.
Fixed-cost pressure	Fixed costs rise 15% to about $87K a month.	$125K/month	$16K gap	Higher rent, software, insurance, or payroll raise the floor.
Margin pressure	Contribution margin drops 5 points to 65%.	$117K/month	$8K gap	Fabric cost inflation or rework eats the cushion.
Combined pressure	Revenue falls 20%, margin drops to 65%, and fixed costs rise 15%.	$134K/month	$31K gap	Delays plus cost pressure can create a monthly loss.

Can you prove the pipeline and cash before you commit to the shop, crew, and install gear?

Founder checklist

This business is ready to commit only if signed work can cover at least $109K a month, Year 1 fixed burn sits near $76K a month, and cash holds through Month 2. If any one of those slips, delay the lease, crew growth, and full capex buy.

1Pipeline Cover$109K/mo

Verify signed proposals and booked work can reach at least $109K a month before you lock space or add install capacity.

2Fixed Burn$76K/mo

Check that Year 1 fixed costs and payroll stay near $76K a month, because that is the burn you carry before variable work starts paying back.

3Bid Margin70% CM

Price every bid against the full 30% Year 1 variable load, not just material quotes, so each job clears enough margin to cover overhead.

4Tooling Gate$350K capex

Lock quotes for fabric, steel, hardware, freight, and fabrication, and don't buy the full $350K capex set or add semi-fixed crew until the engineering review flow can handle stamped jobs on time.

5Cash Cushion$697K

Hold at least the $697K minimum cash reserve, since cash bottoms in Month 2 and breakeven lands in Month 3.

6CAC Test$1,500 CAC

Track customer acquisition cost against the $1,500 Year 1 assumption and the $45K marketing budget, and only scale spend when it turns into signed pipeline.