Contact Dermatitis Patch Testing Break-Even: $81K/Month

Fixed costs $52.2K/mo Monthly base cost

Contribution margin 82% After variable spend

Break-even revenue $64.1K/mo Revenue to break even

Break-even timing Month 1 Launch month

Break-even calculator

Test monthly revenue, variable expenses, and fixed costs against break-even for a contact dermatitis patch testing clinic.

Lean Base Full

Monthly revenue Revenue sets the margin that can cover fixed costs. $ Low revenue High revenue Variable expenses Direct clinical and billing costs rise as treatments rise. $ Low costs High costs

Money available to cover fixed costs $352,345 $371,833 revenue - $19,488 variable expenses

Margin ratio

95%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly cost base contribution margin must cover. $ Lower fixed Higher fixed

Break-even chart Revenue Total costs

Which patch testing expenses are fixed and which move with patient volume?

Cost classification

Break-even works only if steady clinic overhead stays separate from per-test costs and volume-linked staffing. In the first operating year, fixed overhead is $21,800/month before wages and test-level variable expenses.

Expense	Cost	Break-Even Treatment	Common Mistake
Clinic Facility Rent	Fixed	Model as $12,500 per month across the planning range.	Spreading rent per test, which hides low-volume risk.
Malpractice Insurance Premiums	Fixed	Carry as $3,200 per month before patient volume.	Assuming insurance falls when test volume is slow.
EHR and Practice Management Software	Fixed	Include $1,800 per month in baseline overhead.	Treating required clinical software as optional spend.
Allergen Test Kits and Panels	Variable	Apply 12.0% of revenue in the first year, falling to 10.0% by the mature year.	Using one flat dollar amount despite higher test volume.
Clinical Disposal and Medical Consumables	Variable	Apply 3.0% of revenue in the first year, falling to 2.2% by the mature year.	Forgetting disposal and supplies on each completed test.
Medical Billing and Claims Processing	Variable	Model as 5.0% of revenue in the first year, declining to 4.2% by the mature year.	Counting claims work as fixed back-office labor only.
Patient Coordinator, Billing Specialist, and Medical Assistant Staffing	Semi-variable	Step up FTEs as volume grows, including patient coordinators from 1.0 to 3.0 and medical assistants from 1.0 to 5.0.	Treating follow-up read labor as free.
Utilities and Clinical Maintenance	Semi-fixed	Start with $1,500 per month and review when room count or operating scale changes.	Leaving overhead flat after adding rooms and clinical capacity.

How does break-even shift from lean ramp to base scale to full capacity in contact dermatitis patch testing?

Scenario table

Lean Year 1 sits close to break-even, base Year 2 adds a clearer cushion, and full Year 5 has the widest spread. The gap mainly comes from filled slots, payer mix, and how fast staffing scales.

Planning figures only; real break-even shifts with payer mix, staffing, and appointment fill.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean Year 1 ramp	$123.7k	$27.8k	$62.7k	77.5%	$33.2k	Near break-even; a small slot miss can erase profit.
Base Year 2 scale	$223.8k	$47.9k	$73.2k	78.6%	$102.7k	Above break-even with room to absorb slower payer mix.
Full Year 5 capacity	$718.1k	$130.0k	$93.6k	81.9%	$494.5k	Strong cushion, but only if staffing stays tight.

What breaks the break-even plan for contact dermatitis patch testing?

Stress test

Year 1 monthly revenue is $1.237M against an $809k break-even line, so the base case starts with a $428k cushion. The weak spots are a revenue dip under that line, higher fixed overhead, and margin drag from kits, billing, and outreach.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$809k	$428k cushion	The base case clears break-even, but slack is not huge.
Revenue shortfall	Monthly revenue slips to $790k.	$809k	$19k gap	That is below break-even, so the plan turns negative fast.
Fixed-cost pressure	Fixed monthly overhead rises by $10k.	$823k	$414k cushion	Extra overhead trims the cushion before volume can catch up.
Margin pressure	Contribution margin falls to 72.5% as kit, billing, and outreach costs rise.	$865k	$372k cushion	Higher variable spend eats more of each dollar earned.
Combined pressure	Monthly revenue falls to $990k, fixed overhead rises by $10k, and margin slips to 72.5%.	$879k	$111k cushion	Watch fewer reads, more coverage, and slower referral fill; those are the first warning signs.

What should a founder verify before signing the lease for contact dermatitis patch testing?

Founder checklist

Don’t sign the lease or add rooms until referrals, payer rates, staffing, inventory, and cash all match the opening plan. The model needs $808K minimum cash in Month 2, so the launch has to work from day one.

1Referral Pipe159/mo

Verify referral partners can send at least 159 completed workups each month, or the clinic will sit below break-even volume.

2Workup Capacity242

Confirm the opening team can handle 242 Year 1 planned workups and keep follow-up read slots open before booking the first applications.

3Payer Rates$350-$850

Test reimbursement against the Year 1 price range, because rates below that band will squeeze contribution and slow payback.

4Launch Build$280.5K

Secure the full launch build and the $35K initial allergen stock before ramping, and delay added rooms until utilization can support the fixed load.

5Cash Cushion$808K

Hold enough cash to cover the Month 2 low point, since buildout and payroll hit before the revenue curve catches up.

6Core Coverage$62.7K/mo

Staff medical assistant, billing, and patient coordination coverage plus HIPAA systems before opening, or missed reads and claim lag will hit cash fast.