Solar Installation Break-Even Analysis: $55K Monthly Revenue

Fixed costs $45.7K/mo Payroll plus overhead

Contribution margin 82.5% After variable costs

Break-even revenue $55.4K/mo Monthly revenue target

Break-even timing Month 1 Launch month

Break-even calculator

Test monthly revenue, variable expenses, and fixed costs against break-even for a solar installation business.

Lean Base Full

Monthly revenue Revenue sets the pool that covers variable costs and fixed overhead. $ Low sales High sales Variable expenses These direct costs rise with installs, permits, and selling effort. $ Light costs Heavy costs

Money available to cover fixed costs $731,185 $865,367 revenue - $134,182 variable expenses

Margin ratio

84%

Covers fixed costs

Yes

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

Break-even chart Revenue Total costs

Which solar installation expenses are fixed and which move with sales?

Cost classification

Break-even only works if fixed overhead stays above the line and job-tied spend gets deducted before contribution margin. Here, the first operating year has $450,000 of payroll overhead before materials, permits, sales spend, and site logistics.

Expense	Cost	Break-Even Treatment	Common Mistake
Office and Warehouse Rent	Fixed	$3,000 per month in monthly overhead.	Treating the lease as job-level spend.
Vehicle Fleet Fixed Costs	Fixed	$1,500 per month in monthly overhead.	Tying all vehicle spend to completed installs.
Business Insurance	Fixed	$800 per month in monthly overhead.	Excluding required coverage from break-even.
Wages	Fixed	$450,000 per year in first-year payroll overhead.	Assuming crew payroll disappears when jobs slip.
Direct Material Costs	Variable	Deduct 13.0% of first-year revenue before contribution margin.	Using total revenue instead of install mix.
Permitting and Interconnection Fees	Variable	Deduct 1.5% of first-year revenue as a job-tied requirement.	Assuming every jurisdiction clears at the same pace.
Sales Commissions & Lead Generation	Variable	Deduct 2.0% of first-year revenue as acquisition spend.	Counting signed leads as completed revenue.
Installation Consumables & Logistics	Variable	Deduct 1.0% of first-year revenue for job support spend.	Omitting small delivery and site items.

How does break-even change from a lean solar launch to a full scale build-out?

Scenario table

Higher volume lifts revenue faster than fixed overhead, so the cushion widens as the install mix scales. The base case is the cleanest read on steady break-even control.

Planning figures only; actual break-even will move with pricing, labor mix, and execution.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch plan	$250k	$43.7k	$45.7k	82.5%	$160.1k	Wide cushion; one-crew launch clears fixed costs.
Base steady plan	$865.4k	$134.1k	$69.9k	84.5%	$661.5k	Good cushion, but the pipeline must keep pace with a larger crew.
Full scale plan	$1.81M	$244.2k	$92.0k	86.5%	$1.47M	Strong cushion that supports multi-crew scale-up.

How quickly does break-even move when solar installs slow or costs rise?

Stress test

Year 1 has a wide cushion, but break-even tightens fast if permits slow or lead spend rises. The real risk is signed work sitting unbilled while payroll, rent, insurance, and vehicles keep running.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$554k	$1,942k cushion	Strong buffer if installs stay on schedule.
Revenue shortfall	Monthly revenue falls to $554k.	$554k	$0 gap	One more delay turns the month negative.
Fixed-cost increase	Monthly overhead rises to $920k in Year 5.	$1,064k	$1,432k cushion	More staff and fleet cost lift the floor.
Margin pressure	Variable costs stay at 17.5% of revenue instead of improving to 13.5%.	$1,115k	$1,381k cushion	Lead and logistics spend push break-even higher.
Combined pressure	Monthly revenue falls to $554k while overhead rises to $920k and variable costs stay at 17.5%.	$1,115k	$561k gap	Delayed permits and higher sales spend can put the month underwater.

Can this solar business clear break-even before it signs the lease and buys the first fleet?

Founder checklist

Before you sign the lease, buy vehicles, or hire installers, confirm the Year 1 job mix can carry the monthly load. The model points to about $249.6K in average monthly revenue, but cash still has to stay above the $901K floor.

1Booked Revenue$249.6K/mo

Confirm the pipeline and CRM can hold the Year 1 mix of 50 residential installs, 5 commercial installs, 20 batteries, and 10 maintenance plans.

2Base Overhead$45.7K/mo

Keep fixed monthly overhead at $45.7K and delay the $3,000 rent if a warehouse is not tied to booked work.

3Gross Margin82.5% CM

Check that Year 1 pricing holds contribution margin near 82.5% after material, permitting, commissions, and logistics.

4Crew Capacity55 installs

Test whether the Year 1 crew can schedule 50 residential and 5 commercial installs, plus permitting and interconnection handoffs, without slipping promised dates.

5Cash Cushion$901K

Keep the $901K minimum cash reserve separate from EBITDA, because Month 1 cash pressure hits before steady profit.

6Launch Capex$180K

Treat the $180K launch capex as a cash call, confirm insurance before field work starts, and only buy the $80K fleet, tools, safety gear, and inventory against booked work.