Laboratory Centrifuge Repair Break-Even: About $48K Monthly

Fixed costs $31.5K/mo Base monthly overhead

Contribution margin 70% After variable costs

Break-even revenue $45.0K/mo Zero-profit revenue

Break-even timing Month 9 Model break-even point

Break-even calculator

Use this to test monthly revenue, variable expenses, and fixed costs against break-even for a laboratory centrifuge repair service.

Lean Base Full

Monthly revenue More service revenue gives you more room to cover overhead. $ Lower sales Higher sales Variable expenses Use direct costs that rise with each repair, part, trip, and referral. $ Lower costs Higher costs

Money available to cover fixed costs $31,092 $44,417 revenue - $13,325 variable expenses

Margin ratio

70%

Covers fixed costs

$6,083 short

Fixed monthly costs This is the monthly cost base that break-even has to cover. $ Lower overhead Higher overhead

Break-even chart Revenue Total costs

Which centrifuge repair expenses stay fixed, and which move with repair volume?

Cost classification

Break-even gets shaky when parts, mileage, and unpaid diagnostics are buried in overhead. In this model, fixed monthly overhead starts at $8,050 before payroll, while parts, logistics, commissions, and fuel reduce margin as repair volume rises.

Expense	Cost	Break-Even Treatment	Common Mistake
Workshop and office rent	Fixed	Hold at $4,500 per month for the planning range.	Spreading rent across jobs and hiding weak job margins.
Field service management software	Fixed	Hold at $650 per month unless the subscription tier changes.	Linking software spend to each repair ticket.
Professional liability insurance	Fixed	Hold at $1,100 per month in operating break-even.	Leaving insurance out because it is not tied to jobs.
First-year payroll	Fixed	Model about $23,417 per month before benefits, based on planned first-year staffing.	Treating technician payroll as variable before headcount changes.
Annual marketing budget	Semi-fixed	Model the first-year budget at $25,000, then step it up with the growth plan.	Treating all marketing as per-job spend instead of a capacity-building budget.
Spare parts and component procurement	Variable	Apply 18% of first-year revenue as a direct margin reducer.	Treating parts as overhead instead of job-level margin leakage.
Specialized technical logistics	Variable	Apply 5% of first-year revenue to reflect job-linked logistics needs.	Ignoring freight and handling until cash runs short.
Vehicle fuel and field maintenance	Semi-variable	Model at 4% of first-year revenue, then refine by route density and job distance.	Treating mileage and travel time as fixed overhead.

How does break-even change from a lean launch to base and full capacity in this laboratory centrifuge repair service?

Scenario table

Break-even shifts as billable work rises, but fixed payroll and overhead climb too. More monthly revenue helps only when it grows faster than the cost base.

Scenario figures are planning assumptions for comparison, not guarantees.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch route mix	$44.4k	$13.3k	$31.5k	70.0%	-$73k	Revenue sits near break-even, so early cash pressure stays real.
Base repeat-service route mix	$90.3k	$26.0k	$45.6k	71.2%	$104k	Revenue clears break-even and leaves a modest cushion for repeat work.
Full multi-technician capacity	$266.6k	$66.6k	$80.1k	75.0%	$1.115m	Revenue sits far above break-even, so added staff is easier to carry.

What breaks the break-even plan for a laboratory centrifuge repair service?

Stress test

Year 1 breaks even at about $47,929 a month in revenue, with almost no cushion. The plan is most exposed to slower sales, higher parts and travel costs, and callbacks that pull margin down.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change in pricing, mix, or overhead.	$47,929	$0 cushion	Very thin cushion; small delays matter.
Revenue shortfall	Service revenue runs 15% below plan.	$47,929	$5,000 gap	A small sales miss wipes out monthly profit.
Fixed-cost pressure	Overhead rises 10% across rent, admin, and insurance.	$52,721	$3,400 gap	Higher overhead lifts the sales bar fast.
Margin pressure	Parts, shipping, fuel, and referral costs rise from 30% to 35%.	$51,615	$2,400 gap	Small cost overruns quickly erode cushion.
Combined pressure	Revenue falls 15%, margin drops to 65%, and overhead rises 10%.	$56,777	$10,400 gap	Slow demand plus cost drag creates a clear cash hole.

Can this laboratory centrifuge repair service prove break-even readiness before you commit to rent, the service vehicle, and parts stock?

Founder checklist

Don’t lock the $4,500 rent, buy the $42,000 service vehicle, or carry $35,000 of critical parts stock until the Month 9 break-even path looks real. The model also needs $714,000 of minimum cash by Month 18, so a slow ramp gets expensive fast.

1Demand Proof$533K Y1

Verify local lab demand can support the model’s $533,000 Year 1 revenue before you lock the lease, buy the van, or stock critical parts.

2Fixed Load$8.1K/mo

Your fixed base is about $8,050 a month, so confirm rent, software, insurance, utilities, legal, and certification renewals still fit if early work comes in light.

3Margin Mix70% CM

Check that parts, logistics, fuel, and referral fees stay near 30% of revenue, because that leaves about 70% contribution margin to cover payroll and overhead.

4Service Capacity3.5 FTE

Make sure the Year 1 team can handle emergency repair, maintenance, and calibration work at the $250, $195, and $225 hourly rates before you rely on the Month 9 break-even path.

5Cash Buffer$714K

Protect cash because the model’s minimum balance hits $714,000 in Month 18, so delay second-stage hiring if break-even slips.

6Launch CAC≈45 customers

At $25,000 of Year 1 marketing spend and a $550 CAC, you buy about 45 customers, so check that the opening pipeline can convert fast enough to fill the bench.