Outpatient Surgical Center Break-Even Analysis: $270K Monthly Revenue

Fixed costs $42.3K Monthly base load

Contribution margin 84.5% After variable costs

Break-even revenue $50.1K Monthly target

Break-even timing Month 1 Launch month

Break-even calculator

Use this calculator to test monthly revenue, variable expenses, and fixed costs against break-even for an outpatient surgical center.

Lean Base Full

Monthly revenue Higher monthly revenue gives more room to cover fixed costs. $ Low volume High volume Variable expenses Medical supplies, billing fees, and other costs that rise with volume. $ Light cost Heavy cost

Money available to cover fixed costs $634,595 $751,000 revenue - $116,405 variable expenses

Margin ratio

84%

Covers fixed costs

Yes

Fixed monthly costs Lease, staffing, and overhead the center must cover each month. $ Light overhead Heavy overhead

Break-even chart Revenue Total costs

Which outpatient surgical center expenses stay fixed, and which move with procedure volume?

Cost classification

Break-even gets shaky when fixed overhead, case-level supplies, and staffing steps are mixed together. Classify each line correctly, so contribution margin covers the right monthly burden.

Expense	Cost	Break-Even Treatment	Common Mistake
Facility Lease	Fixed	Carry $25,000 per month as overhead that must be covered before profit.	Spreading rent per procedure and hiding empty-room risk.
Insurance Premiums	Fixed	Include $4,000 per month in fixed overhead for the full planning range.	Modeling premiums as if they fall during slow months.
EHR Software Base Subscription	Fixed	Treat the $2,500 monthly base subscription as overhead, separate from usage fees.	Blending the base subscription with transaction fees.
Medical and Surgical Supplies	Variable	Deduct from contribution margin; modeled at 9.0% of revenue in the first year.	Putting procedure supplies in fixed overhead.
Sterilization and Reprocessing Supplies	Variable	Deduct from contribution margin; modeled at 1.5% of revenue in the first year.	Confusing supplies with sterilization equipment purchases.
Billing and Collections Fees	Variable	Deduct from contribution margin; modeled at 4.0% of revenue in the first year.	Ignoring fees until after break-even is calculated.
Utilities	Semi-variable	Start with the modeled $3,500 monthly base, then stress test more operating days.	Assuming utility use is identical at 60% and 90% capacity.
Staff Payroll	Semi-fixed	Model payroll in FTE steps, from $185,833 per month in the first year to $726,042 in Year 5.	Treating payroll as purely variable during slow months.

How does break-even change from a lean launch to a full schedule in an outpatient surgical center?

Scenario table

Break-even holds from the opening month because contribution margin stays above fixed overhead in every case. The cushion widens as staffing, capacity, and pricing rise faster than variable costs.

Planning assumptions only; payer mix and collections timing can move actual break-even.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch	$751k	$116k	$228k	84.5%	$406k	Break-even starts in Month 1, but the cushion is still modest.
Base growth	$1.01M	$139k	$458k	86.3%	$417k	Still above break-even, with more room than the lean launch.
Full schedule	$1.28M	$151k	$768k	88.2%	$361k	Highest cushion, but fixed overhead is much heavier.

What breaks the break-even plan for an outpatient surgical center?

Stress test

The first-year plan has room, but the cushion narrows fast if revenue slips or overhead creeps up. A 20% revenue drop still leaves about $797K cushion, and the combined stress case still leaves about $714K.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change from the Year 1 plan.	$270K	$1.06M cushion	Healthy buffer above break-even.
Revenue shortfall	Revenue falls 20% from the Year 1 plan.	$270K	$797K cushion	Still clears break-even with room.
Fixed-cost increase	Fixed overhead rises 10% to about $251K per month.	$295K	$1.04M cushion	Higher overhead lifts the break-even line.
Margin pressure	Variable expenses rise 5 points, so contribution margin falls to 79.5%.	$287K	$982K cushion	Fee drag trims cushion, but break-even still holds.
Combined pressure	Revenue falls 20%, variable expenses rise 5 points, and fixed overhead rises 10%.	$316K	$714K cushion	A deeper drop than roughly 82% would put break-even at risk.

Can this outpatient surgical center cover its fixed load before you sign the lease and hire the team?

Founder checklist

Before you commit, prove that booked cases can cover the center's fixed load and opening cash burn. The model starts with a $42.3K monthly fixed base, $185.8K in Year 1 payroll, and a $677K minimum cash need.

1Lease load$42.3K/mo

Verify the lease and all other fixed costs fit the case load, because the facility lease alone is $25K a month and the full fixed base sets the break-even floor.

2Payroll load$185.8K/mo

Check that the opening team can stay at the Year 1 staffing level before you lock in about $185,833 a month in payroll.

3Case volume20/mo

Secure enough surgeon and anesthesia volume to match the Year 1 plan of 20 monthly treatments for each, or the Month 1 break-even assumption gets shaky.

4Supply quotes10.5% COGS

Validate vendor pricing against first-year COGS of 10.5% of treatment price, split between 9.0% medical and surgical supplies and 1.5% sterilization and reprocessing.

5Build-out$1.78M

Stage the biggest purchases across operating room equipment, leasehold improvements, anesthesia machines, patient monitoring systems, and sterilization equipment so capex does not drain cash before cases ramp.

6Cash floor$677K

Keep the modeled $677K in reserve and only open when Month 1 bookings are already lined up, because the model shows break-even in Month 1 and delays hit hard.