Solar Installation Break-Even Analysis: $85K Monthly Revenue

Fixed costs $49.7K/mo Year 1 base

Contribution margin 73% After variable spend

Break-even revenue $68.1K/mo Monthly target

Break-even timing Month 5 Model break-even

Break-even calculator

Test monthly revenue, direct costs, and overhead to see where this solar installer breaks even.

Lean Base Full

Monthly revenue Revenue sets the margin pool that must cover fixed costs. $ Low sales High sales Variable expenses Use direct costs that rise with each project, job, or service call. $ Light costs Heavy costs

Money available to cover fixed costs $115,000 $150,000 revenue - $35,000 variable expenses

Margin ratio

77%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly overhead contribution margin has to cover. $ Lean overhead Heavy overhead

Break-even chart Revenue Total costs

Which expenses are fixed and which move with sales for a solar installer?

Cost classification

Break-even gets reliable only when job-linked spending sits above contribution margin and true overhead stays fixed. In the first year, variable project costs total 27% of revenue before the $13,900 monthly overhead and $35,833 monthly payroll load.

Expense	Cost	Break-Even Treatment	Common Mistake
Solar Hardware & Components	Variable	Model at 17% of first-year revenue before contribution margin.	Treating panels and components as fixed inventory.
Permitting & Interconnection Fees	Variable	Model at 4% of first-year revenue tied to completed projects.	Leaving permit fees below gross margin.
Sales Commissions	Variable	Model at 4% of first-year revenue as selling volume rises.	Mixing commissions into fixed payroll.
Project-Specific Subcontractor Fees	Variable	Model at 2% of first-year revenue for overflow field labor.	Hiding overflow labor inside fixed wages.
Office & Warehouse Rent	Fixed	Include in the $13,900 monthly operating overhead from Month 1.	Waiting to model rent until after lease signing.
Vehicle Fleet Lease & Maintenance	Fixed	Carry $3,000 per month through the planning range.	Ignoring truck commitments before install volume is proven.
Business Insurance	Fixed	Carry $950 per month as recurring operating overhead.	Underbudgeting safety and liability coverage.
Salaried Payroll	Fixed	Use $35,833 per month in the first year for core staff.	Excluding owner and crew wages from break-even.

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

Scenario table

CM means contribution margin: revenue left after variable costs. Lean does not cover fixed overhead, base lands at zero profit, and full scale adds a real cushion.

These are planning assumptions, not guarantees; actual break-even will move with close rates, labor mix, and project size.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch case	$30,620	$8,267	$62,233	73.0%	-$39,880	Break-even risk stays high; revenue still misses overhead.
Base break-even case	$85,251	$23,018	$62,233	73.0%	$0	This is the break-even point; operating profit is zero.
Full scale operating case	$176,118	$47,552	$62,233	73.0%	$66,333	Strong cushion; scale now covers overhead and adds profit.

What breaks the solar break-even plan first?

Stress test

The base plan clears break-even, but the cushion can shrink fast if installs slow or costs creep. A small margin drop or a modest overhead jump lifts the revenue needed each month.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$85,251	$90,868 cushion	Base case clears break-even, but Month 4 cash still needs tight control.
Revenue shortfall	Monthly revenue runs 10% below plan.	$85,251	$73,256 cushion	You still clear break-even, but the safety margin shrinks fast.
Fixed-cost pressure	Monthly overhead rises by $5,000.	$92,100	$84,019 cushion	Rent, fleet, or admin creep pushes break-even higher.
Margin pressure	Variable expenses rise by 1 point to 28% of revenue.	$86,435	$89,684 cushion	Small margin slips quickly raise the monthly revenue needed.
Combined pressure	Revenue is 10% below plan, overhead rises $5,000, and variable load rises 1 point.	$93,380	$65,127 cushion	That mix can pull cash need toward the $728,000 Month 4 peak.

What should you verify before you lock the lease and crew for a solar power company?

Founder checklist

Don’t lock the lease, vans, or hiring until the first-year pipeline can clear the ramp load and still reach Month 5 break-even. The model only works if CAC stays near $2,500, cash holds through the $728,000 Month 4 trough, and recurring work starts attaching fast.

1Crew RampMonth 13

Verify electrical sign-off and certified coverage are in place before install demand outruns the current crew, because the plan adds that role in Month 13.

2Demand Proof5+ / mo

Verify you can close at least five customers a month before you add fixed commitments, or the break-even date will slip.

3CAC Control$2.5K CAC

Verify booked jobs still cost about $2,500 to win, so marketing spend can scale without breaking payback.

4Fixed Load$62.2K/mo

Verify rent, fleet, insurance, software, and wages fit the monthly fixed load before you sign a lease or buy more vehicles.

5Cash Reserve$728K

Verify cash can absorb the Month 4 trough, since minimum cash hits $728,000 before the model turns the corner.

6Margin Floor73% / 30%

Verify direct project costs stay near 27% of revenue and maintenance attaches at the Year 1 target of 30%, so Month 5 break-even stays believable.