Sip-And-Puff Device Break-Even Analysis: $142K Monthly Revenue

Fixed costs $108.1K/mo Recurring base

Contribution margin 74% After variable costs

Break-even revenue $145.3K/mo Monthly target

Break-even timing Month 1 Launch month

Break-even calculator

Test monthly revenue against variable expenses and fixed costs for a breath-controlled input device supplier.

Lean Base Full

Monthly revenue Revenue is the pool that covers direct costs and overhead. $ Lower sales Higher sales Variable expenses These costs rise with sales and cut the margin left for fixed costs. $ Tighter costs Higher costs

Money available to cover fixed costs $1,116,867 $1,504,167 revenue - $387,300 variable expenses

Margin ratio

74%

Covers fixed costs

Yes

Fixed monthly costs This is the monthly overhead the business must cover. $ Lean overhead Heavier overhead

Break-even chart Revenue Total costs

Which assistive device expenses are fixed and which move with sales?

Cost classification

Break-even is reliable only if stable overhead stays fixed and volume-driven work moves with sales. Here, the big risk is burying support, warranty, and fulfillment load inside overhead.

Expense	Cost	Break-Even Treatment	Common Mistake
ISO Certified Facility Lease	Fixed	Include $12,500 per month in fixed overhead from Month 1 through Month 60.	Treating the lease as unit COGS and making low-volume break-even look cleaner than it is.
Product Liability Insurance	Fixed	Include $4,200 per month as recurring overhead across the planning range.	Scaling it with units when the model treats it as a stable monthly charge.
Cloud Infrastructure and Health Insurance Portability and Accountability Act Storage	Fixed	Include $1,800 per month in fixed overhead unless the storage contract changes.	Ignoring it because it feels technical, even though it hits cash every month.
Direct Unit Components and Assembly Labor	Variable	Apply per unit: about $392 for premium controllers and $11 for filter kits before revenue-based overhead.	Averaging all product COGS into one rate and hiding product mix risk.
Sales Commissions	Variable	Apply 5.0% of sales revenue in each forecast year.	Modeling commissions as fixed payroll and overstating margin as sales rise.
Shipping and Logistics	Variable	Apply 3.5% of revenue in the first year, stepping down to 2.5% in the mature year.	Holding freight flat while unit volume rises from 8,300 to 46,300 units.
RMA Processing Allocation and Technical Documentation Printing	Semi-variable	Model a base process plus volume load; the data shows 0.5% and 0.3% of revenue.	Treating support and warranty work as pure overhead when volume drives workload.
Clinical Support Specialist Payroll	Semi-fixed	Add headcount in steps: 2.0 FTE in the first year and 10.0 FTE by the mature year at $85,000 salary.	Spreading support payroll evenly per unit and missing hiring cliffs.

How does break-even move from lean launch to base and full scale for a sip-and-puff medical supplier?

Scenario table

Higher run rates spread the same fixed base over more sales, so the cushion improves fast once the first-month hurdle is covered. Lean shows the minimum viable cover; base and full show how much room volume creates.

Planning figures only; actual results can move with product mix, volume, and support load.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch break-even	$142k	$34k	$108k	76.1%	$0	Just covers fixed costs, so the cushion is thin.
Base first-year plan	$644k	$154k	$108k	76.1%	$382k	Leaves a solid cushion above break-even.
Full near-term scale plan	$1.012M	$239k	$125k	76.4%	$648k	Widens the cushion for growth and support.

What breaks the break-even cushion if sales slow or costs rise?

Stress test

The base case has a wide cushion, but it thins fast if institutional sales slow or support and shipping costs rise. What this estimate hides is timing: cash strain can show up before the annual break-even math does.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change in sales or costs.	$1,421k	$5,017k cushion	Base case still leaves a wide cushion.
Revenue shortfall	Revenue falls 20% to about $5,150k.	$1,421k	$3,729k cushion	Slower institutional buying trims cushion, but the model still clears break-even.
Fixed-cost increase	Fixed costs rise 15% to about $1,243k.	$1,633k	$4,805k cushion	Lease, insurance, or R&D creep cuts slack fast.
Margin pressure	Variable expense load rises 5 points.	$1,521k	$4,917k cushion	Shipping, replacement, or support cost creep pushes break-even up.
Combined pressure	Revenue falls 20%, variable load rises 5 points, and fixed costs rise 15%.	$1,748k	$3,402k cushion	Slow sales plus higher support load is the main watchout.

What should the founder verify before locking the lease, staff, and buildout for this assistive device business?

Founder checklist

The model clears break-even in Month 1 on paper, but only if demand, support, suppliers, and cash all hold before you commit to the lease, equipment, and marketing. If any of those slip, the break-even date moves fast.

1Demand Proof8,300 units

Validate purchase demand can support the Year 1 forecast of 8,300 total units before you commit to buildout, because that is the base the whole plan leans on.

2Cost Load$108.1K/mo

Check the Month 1 fixed load plus payroll before variable costs, since this is the monthly bill the business must cover.

3Unit COGS$11-$392

Confirm supplier terms keep component costs inside the modeled range from filter kits to the main controller, or margin slips fast.

4Throughput692/mo

Test whether the team can handle about 692 blended units per month in Year 1 without delays in setup, training, or warranty work.

5Support Plan2 specialists

Hold clinical support at the Year 1 two-specialist plan until service volume proves you need more, because extra headcount raises the break-even bar.

6Cash Buffer$1.113M cash

Keep at least the Month 1 cash need ready against the $865K planned capex, and map intake, documentation, setup, training, replacements, warranty handling, and returns before you spend more.