Marine Electronics Installation Break-Even: $27K Monthly Revenue

Fixed costs $18.3K Monthly overhead

Contribution margin 71% After variable costs

Break-even revenue $25.7K Monthly target

Break-even timing Month 7 Launch ramp

Break-even calculator

Test monthly revenue, variable expenses, and fixed costs against the break-even point for a marine electronics installation service.

Lean Base Full

Monthly revenue More revenue gives you more margin to cover fixed costs. $ Slow month Busy month Variable expenses These are direct costs like materials, fuel, and processing fees. $ Light costs Heavy costs

Money available to cover fixed costs $20,083 $32,583 revenue - $12,500 variable expenses

Margin ratio

62%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly cost base rent, insurance, payroll, and overhead must cover. $ Lean base Large base

Break-even chart Revenue Total costs

Which expenses are fixed and which move with sales for a marine electronics installation service?

Cost classification

Break-even is only reliable if recurring overhead stays separate from sales-linked spend. Mixing setup purchases into monthly operating costs will overstate the revenue needed to reach the Month 7 break-even point.

Expense	Cost	Break-Even Treatment	Common Mistake
Owner and Lead Technician Salary	Fixed	Include $85,000 annually, about $7,083 monthly, in overhead from Month 1.	Leaving founder labor out makes break-even look too easy.
Certified Marine Technician Wages	Semi-fixed	Add $65,000 annually per full-time technician as capacity steps up.	Treating technician labor as if it scales perfectly by job.
Small Warehouse Rent	Fixed	Include $2,500 monthly overhead from Month 1 through Month 60.	Linking rent to job volume instead of capacity.
Vehicle Lease Payments	Fixed	Include $1,800 monthly overhead while the service vehicle is leased.	Treating lease payments like fuel or trip expense.
Fuel and Vehicle Maintenance	Variable	Model at 6% of revenue in the first year.	Budgeting one flat amount as dock distance and jobs rise.
Merchant Processing Fees	Variable	Model at 3% of revenue each year.	Forgetting card fees grow with collected sales.
Consumable Installation Materials	Variable	Model at 12% of revenue in the first year.	Putting wire, connectors, and sealants in fixed overhead.
Subcontracted Specialized Labor	Variable	Model at 8% of revenue in the first year.	Counting specialist help as permanent payroll.

How does break-even shift from a lean launch to a full multi-tech schedule?

Scenario table

Lean work gets close to break-even because revenue just covers fixed overhead. As the schedule fills, the margin stays strong, but payroll and travel load rise too, so the cushion depends on keeping technicians booked.

Planning case only: these figures are modeled assumptions, so actual break-even can move with job mix, travel, and staffing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean one-van launch	$22.6k	$6.5k	$16.1k	71%	$0	At break-even, so one weak month can slip red.
Base steady marina work	$32.6k	$9.4k	$21.2k	71%	$1.9k	Small cushion, but downtime or travel can erase it fast.
Full multi-tech schedule	$63.3k	$17.1k	$32.7k	73%	$13.5k	Comfortable cushion if two technicians and training stay fully booked.

What breaks the break-even plan for a marine electronics installation business?

Stress test

The base case has room, but not much. A small drop in bookings, higher overhead, or more travel and rework can pull the business below break-even fast.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$271K	$55K cushion	The plan clears break-even, but the buffer is not huge.
Revenue shortfall	Revenue falls 15% to about $277K a month.	$271K	$6K cushion	Weak demand leaves almost no room for misses.
Fixed-cost increase	Fixed overhead rises 10% to about $212K.	$298K	$28K cushion	Higher rent, insurance, and vehicle costs eat into the buffer.
Margin pressure	Variable expenses rise from 29% to 34%.	$292K	$34K cushion	Long routes, warranty rework, and fuel spikes tighten the month.
Combined pressure	Revenue falls 15%, variable expenses rise to 34%, and fixed costs rise 10%.	$306K	$29K gap	That mix pushes the month below break-even.

What should you verify before you lock in the shop and van?

Founder checklist

Don't lock in the lease, van, or hires until booked demand, job flow, and cash all match the model. For this business, that means Year 1 revenue needs to reach $391K, Month 7 break-even has to hold, and the Month 2 cash trough of $837K must be covered.

1Demand Proof$391K Year 1

Confirm booked work can reach $391K in Year 1, or about $32.6K a month, before you lock in the shop and van.

2Fixed Load$18.3K/mo

Check the full monthly burn of about $18.3K, including $600 insurance and $1,800 vehicle lease, before you sign anything that adds fixed cost.

3Gross Margin71% CM

Keep first-year pricing at $125 install, $140 repair, and $100 training, because Year 1 variable costs add to 29% of revenue and leave 71% to cover overhead.

4Job Density4.5 hrs/customer

Map the service radius by billable hours, not miles, and prove 8-hour installs still fit after drive time so a day does not disappear in transit.

5Cash Cushion$837K Month 2

Hold enough cash for the Month 2 trough, because minimum cash is $837K and payback takes 20 months.

6Launch Stock$46.7K setup

Line up consumables, cabling, and test gear before taking deposits, and keep the $46.7K setup buys out of monthly overhead so jobs can start on time.