Solar Installation Break-Even: $565K Monthly Revenue in Month 1

Fixed costs $45.8K/mo Payroll plus overhead

Contribution margin 81% After direct costs

Break-even revenue $56.5K/mo Monthly target revenue

Break-even timing Month 1 Opening month

Break-even calculator

Test how monthly solar revenue, direct costs, and overhead move break-even as installs and service income scale.

Lean Base Full

Monthly revenue Revenue is the top line that pays for direct costs and overhead. $ Low sales High sales Variable expenses These are direct costs tied to panels, permits, sales, and project logistics. $ Light direct cost Heavy direct cost

Money available to cover fixed costs $541,208 $645,833 revenue - $104,625 variable expenses

Margin ratio

84%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly overhead and payroll the business has to cover. $ Lower overhead Higher overhead

Break-even chart Revenue Total costs

Which solar business expenses are fixed, variable, semi-variable, or semi-fixed?

Cost classification

Break-even only works if direct project spend moves with sales and monthly overhead stays fixed. In this model, first-year salaried payroll is $445,000, while panels, permits, lead generation, and job supplies scale with revenue.

Expense	Cost	Break-Even Treatment	Common Mistake
Hardware & Equipment Costs	Variable	Model at 12.0% of first-year revenue, falling to 10.0% by Year 5 as project volume grows.	Treating panels and equipment as overhead.
Permitting & Inspection Fees	Variable	Apply 3.0% of first-year revenue, stepping down to 2.0% by Year 5.	Burying permit fees in admin expense.
Sales & Lead Generation	Variable	Use 3.0% of first-year revenue, declining to 1.0% by Year 5 as lead efficiency improves.	Ignoring paid-lead drag on contribution margin.
Project Logistics & Consumables	Variable	Model at 1.0% of first-year revenue, then reduce to 0.5% by Year 5.	Leaving out job supplies and delivery items.
Salaried Payroll	Fixed	Include $445,000 in first-year salary expense as monthly overhead for the planned team.	Treating all labor as variable by project.
Office Rent	Fixed	Use $3,000 per month from Month 1 through Month 60 in the break-even base.	Scaling rent with sales volume.
Software Subscriptions	Fixed	Use $1,200 per month from Month 1 through Month 60 as recurring overhead.	Mixing one-time setup spend with subscriptions.
Fleet Insurance & Maintenance	Semi-fixed	Start with $1,500 per month, then step it up when vehicle capacity expands.	Modeling fleet expense as a flat sales percentage.

How does break-even change from a lean solar launch to base growth and full scale?

Scenario table

As the business adds revenue lines and crew, fixed cost rises, but variable cost falls from 19.0% to 13.5% of sales. So the dollar break-even point climbs, yet the cushion stays wide in the base and full cases.

Planning-only assumptions; actual margins, staffing, and cash timing can move the result.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch	$208K	$40K	$46K	81.0%	$123K	Break-even is about $57K, so launch sales sit well above the floor.
Base growth	$646K	$105K	$71K	83.8%	$470K	Break-even is about $85K, leaving a large cushion in the growth case.
Full scale	$1.23M	$165K	$131K	86.5%	$928K	Break-even is about $151K, and the mature mix still leaves room.

What breaks first if solar bookings slip, costs rise, or overhead runs hot?

Stress test

The base case has room, but the model is most exposed to slower bookings, higher crew and permit costs, and fixed overhead creep. Even after a 20% revenue drop and a 5-point margin hit, it still stays above break-even, but the cushion narrows.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change from the base case.	$565K	$1.52M cushion	Base case clears break-even fast.
Revenue shortfall	Year 1 revenue falls 20%.	$565K	$1.10M cushion	Booking softness still leaves room, but deposits matter.
Fixed-cost pressure	Fixed overhead rises 10%.	$622K	$1.46M cushion	Headcount or rent creep pushes break-even up.
Margin pressure	Direct project costs rise 5 percentage points.	$603K	$1.48M cushion	Permit delays and lead-cost spikes hit margin first.
Combined pressure	Revenue falls 20%, direct costs rise 5 points, and fixed overhead rises 10%.	$663K	$1.00M cushion	Slow customer deposits and crew gaps are the warning signs.

What should a solar founder verify before signing the lease and buying the first fleet?

Founder checklist

If you can’t show booked or highly probable monthly revenue above $565K and keep Year 1 payroll near $445K, don’t lock the lease or fleet yet. The model breaks even in Month 1, but only when demand, cash, and crew capacity are already lined up.

1Booked Demand>$565K/mo

Verify you have enough signed or highly probable monthly work to clear the opening threshold before you commit to fixed overhead.

2Fixed Burn$45.8K/mo

Check that office, software, insurance, and payroll stay near this run rate so the cost base does not outrun booked jobs.

3Direct Margin81% CM

Confirm hardware, permitting, sales, and logistics stay near 19% of revenue so the project mix still funds overhead.

4Crew Capacity6.5 FTE

Match Year 1 staffing to the residential and commercial install calendar, and do not add headcount without signed backlog.

5Launch Mix$2.5M Y1

Verify Year 1 residential and commercial sales can fill the launch period, since maintenance, storage, and charger revenue start later.

6Cash Buffer$851K min

Hold this Month 1 cash and keep the $255K setup capex separate so tools, vehicles, software, and inventory do not drain working capital.