Break-Even Analysis for a Biomechanics Lab: $53K Monthly Revenue

Fixed costs $25.0K/mo Facility overhead

Contribution margin 69.5% After direct costs

Break-even revenue $78.3K/mo Monthly target

Break-even timing Month 27 Model crossover

Break-even calculator

Use this calculator to test monthly revenue against variable spend and fixed overhead to see where the lab breaks even.

Lean Base Full

Monthly revenue Revenue is the cash coming in each month before variable costs and overhead. $ Early Mature Variable expenses These are direct costs that rise with billable work, like calibration, software, training, and client acquisition. $ Light Heavy

Money available to cover fixed costs $49,457 $67,750 revenue - $18,293 variable expenses

Margin ratio

73%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly overhead the lab must cover, including facility, staff, and service plans. $ Low overhead High overhead

Break-even chart Revenue Total costs

Which biomechanics lab expenses are fixed, and which move with sales?

Cost classification

Break-even is more reliable when rent, insurance, payroll, and service plans stay out of per-session costs. Here’s the quick math discipline: only revenue-linked items should move with sales volume.

Expense	Cost	Break-Even Treatment	Common Mistake
Laboratory Facility Lease	Fixed	Include $12,500/month in fixed overhead from Month 1 through Month 60.	Spreading rent across each test as if it rises with sessions.
Insurance and Liability Coverage	Fixed	Include $2,800/month as required operating overhead.	Linking insurance to billable hours instead of the monthly policy load.
Utilities and Facility Maintenance	Semi-variable	Keep the base facility load in overhead, with higher usage tied to lab activity.	Treating all utilities as fixed even when testing volume rises.
CEO and Lead Biomechanist	Semi-fixed	Model the $145,000/year salary as capacity overhead until staffing needs step up.	Charging the full salary like a per-test expense.
Senior Kinesiologist	Semi-fixed	Use 0.5 FTE in the first year, then step to 1.0 FTE from the second year.	Modeling payroll as variable when it changes by staffing step.
Equipment Calibration and Maintenance	Variable	Apply 12.0% of revenue in the first year, falling to 7.5% by the fifth year.	Putting usage-driven maintenance into fixed overhead.
Data Analysis Software Licenses	Variable	Apply 8.0% of revenue in the first year, falling to 5.5% by the fifth year.	Treating usage-linked software as a flat monthly subscription.
Equipment Warranty and Service Plans	Fixed	Include $1,200/month in fixed overhead across the planning period.	Treating service contracts like per-session costs.

How does break-even change across lean, base, and full biomechanics lab scenarios?

Scenario table

Fixed payroll and overhead rise as the lab scales, so break-even shifts from a monthly gap in the lean case to a cushion in the base and full cases. The real driver is client volume and analyst use, not revenue alone.

These are planning assumptions, not guaranteed demand or profit.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean biomechanics lab case	$27,667	$8,433	$36,625	69.5%	-$17,392	Still about $17.4k/month short of break-even.
Base biomechanics lab case	$113,000	$28,250	$55,042	75.0%	$29,708	Break-even is near $73.4k/month, so this case has cushion.
Full biomechanics lab case	$258,583	$53,000	$70,125	79.5%	$135,458	Break-even is near $88.2k/month, so this case has a wide cushion.

What breaks the break-even plan for this biomechanics lab?

Stress test

The plan is most fragile when billed revenue slips or delivery gets less efficient. At the Year 3 run-rate, a 15% revenue drop, a 10% fixed-cost jump, or a 5-point margin hit can cut the cushion fast.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$73,700	$39,300 cushion	Solid cushion if utilization stays steady.
Revenue shortfall	Revenue falls 15% to about $96,100.	$73,700	$22,400 cushion	Delayed contracts and empty analyst time squeeze coverage.
Fixed-cost pressure	Fixed costs rise 10% to about $60,800 per month.	$81,100	$31,900 cushion	Lease or staffing creep raises the floor fast.
Margin pressure	Variable expenses rise 5 points to 30% of revenue.	$79,000	$34,000 cushion	Rework, calibration overruns, and underused hours erode margin.
Combined pressure	Revenue falls 15%, fixed costs rise 10%, and variable expenses rise to 30%.	$86,900	$9,200 cushion	Thin cushion; one weak month can push loss.

Can this biomechanics lab clear break-even before you sign the lease and buy the equipment?

Founder checklist

Yes—only if the lab can pre-book about $52.7K a month, or roughly 269 billable hours at the Year 1 blended rate, while covering $25.0K of fixed costs. The model reaches break-even in Month 27, so the lease and hiring plan need to survive that runway.

1Revenue target$52.7K/mo

Verify you can pre-book that monthly run-rate, because it is the revenue level needed to clear break-even.

2Fixed load$25.0K/mo

Verify the lease, insurance, utilities, supplies, telecom, legal, bookkeeping, and service plans stay near this base, because it is the cost you carry before the first client.

3Margin check69.5% CM

Verify Year 1 pricing leaves about 69.5% contribution margin, the share left after variable costs, because thin margin pushes break-even farther out.

4Hire rampMonth 13+

Verify the first 12 months can run lean and that extra hires wait for booked hours, because early payroll can outrun demand.

5Cash floor$24K floor

Verify you can hold at least this cash cushion through Month 28, because the model bottoms out before payback and after the $490.5K equipment build.

6Channel test$480 CAC

Verify referral partners can fill gait analysis, performance optimization, injury risk assessment, rehabilitation programs, and team screening, because a $48K Year 1 budget only buys about 100 acquisitions if the channel works.