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AED Battery Replacement Break-Even Analysis: $94K Monthly Revenue


This US service model covers monthly revenue, contribution margin, fixed monthly costs, and scenario logic for replacement-only work and recurring maintenance contracts Using first-year assumptions, variable expense is 150%, contribution margin is 850%, and overhead with marketing and modeled CEO salary is about $80,000 per month This is not legal, tax, lending, or medical compliance advice


Fixed costs $86.6K/mo Model fixed load
Contribution margin 85% After variable costs
Break-even revenue $101.9K/mo Cover fixed load
Break-even timing Month 41 First profit month

Break-even calculator

Use this to test whether monthly revenue covers variable expenses and fixed costs before you call the business break-even.

Money available to cover fixed costs $140,786 $163,333 revenue - $22,547 variable expenses
Margin ratio
86%
Covers fixed costs
$18,507 short
Break-even chart Revenue Total costs
Plan Break-even $0 $0

Which AED battery replacement service expenses are fixed, variable, or step up as sales grow?

Cost classification

Break-even only works if per-job costs stay tied to revenue and overhead stays separate. Here, battery parts and field delivery move with sales, while rent, software, fleet commitments, and staff create the fixed base to cover.

Expense Cost Break-Even Treatment Common Mistake
Battery and Electrode Pad Costs Variable Use 6.5% of revenue in the first year as direct job-linked expense. Treating parts inventory like fixed overhead instead of sales-linked usage.
Field Technician Service Delivery Costs Variable Use 8.5% of revenue in the first year for service delivery tied to completed work. Blending per-job delivery expense with technician payroll capacity.
Corporate Office Rent Fixed Include $6,500 per month in fixed overhead from Month 1 through Month 60. Lowering rent in the model when sales volume is weak.
Service Management Software Platform Fixed Include $4,200 per month as recurring operating overhead. Spreading the platform charge per customer and overstating contribution margin.
Insurance and Liability Coverage Fixed Include $3,800 per month in the fixed monthly base to cover before profit. Leaving liability coverage out of break-even because it is not job-specific.
Vehicle Fleet Insurance and Maintenance Fixed Include $5,500 per month as fleet overhead within the current operating range. Treating committed fleet expense like it disappears between service visits.
Certified Field Technicians Semi-fixed Model Year 1 as 3 FTE at $52,000 each, then step up staffing as capacity expands. Treating hired staff like per-job labor instead of a capacity commitment.
Annual Marketing Budget Semi-fixed Use $120,000 in the first year as a planned spend level, not a per-customer charge. Replacing the budget with CAC alone and missing committed demand-generation spend.

How does break-even change from a lean compliance mix to a full enterprise fleet mix?

Scenario table

Break-even gets easier as the mix shifts toward higher-value full-service and enterprise fleet contracts. Variable costs fall from 15.0% of revenue in the lean case to 12.6% in the full case, so the same fixed overhead buys more cushion.

These figures are planning assumptions, not guarantees.
Scenario Monthly Revenue Variable Costs Fixed Costs CM Ratio Operating Profit Break-Even Signal
Lean compliance-heavy mix $39,083 $5,863 $80,017 85.0% -$46,797 Still below break-even; overhead is too heavy at this mix.
Base blended mix $163,333 $22,540 $80,017 86.2% $60,777 Clear positive cushion and on the Month 41 break-even path.
Full enterprise fleet mix $314,833 $39,669 $80,017 87.4% $195,147 Wide cushion; dense routes and fleet work absorb overhead better.

What pushes the AED battery replacement plan back below break-even?

Stress test

Year 1 revenue averages $39,083 a month against $94,137 needed to break even, so the plan starts with a wide gap. It gets tighter if contract conversion slows, hiring comes before route density, or battery and field costs stop improving.

Stress Case Changed Assumption Break-Even Revenue Revenue Gap Risk Signal
Current plan No change. $94,137 $55,054 gap Year 1 sales do not cover monthly overhead.
Revenue shortfall Monthly revenue stays at $39,083. $94,137 $55,054 gap Slow contract conversion keeps you below break-even.
Fixed-cost pressure Overhead rises to about $103,933 a month in Year 2. $121,418 $24,085 gap Hiring and marketing lift the monthly hurdle.
Margin pressure Battery and delivery costs stay at 15.0% instead of easing to 12.6% in Year 5. $219,431 $95,402 cushion Sourcing and route efficiency protect the margin.
Combined pressure Year 2 overhead rises and variable cost stays at 15.0%. $122,274 $24,941 gap Slow conversion plus route waste can push the plan back under break-even.

What should you verify before locking in major AED battery replacement spend?

Founder checklist

Don’t lock in fleet, software, or warehouse spend until you’ve proven signed accounts at the Year 1 mix and tested the $45, $95, and $2,500 prices. The model carries about $80,017 of first-year monthly overhead and still falls to a negative $947,000 cash low in Month 40.

1Demand Base45/35/20

Verify you can sign enough automated external defibrillator (AED) accounts to support the Year 1 mix of 45% Basic, 35% Full-Service, and 20% Enterprise before you take on fixed costs.

2Margin Check85.0% CM

Test the $45, $95, and $2,500 price points against 6.5% battery and pad cost plus 8.5% field delivery cost, because that leaves about 85.0% contribution margin before overhead.

3Supply Setup$35K + $42K

Confirm battery and electrode pad supply can support the $35,000 inventory buy and decide on the $42,000 warehouse setup only if storage truly tightens service flow.

4Staffing Ramp$28K train

Budget the $28,000 technician training and certification program first, and only add more vehicles when trained staff and route volume can keep the field team busy.

5Systems Scope$85K + $55K

Validate the service management platform and customer portal needs before committing the $85,000 build and $55,000 compliance system, or you will overspend on unused features.

6Cash Cushion-$947K M40

Plan for the $80,017 first-year monthly overhead and keep enough reserve for the Month 40 cash trough, because the model still shows a negative $947,000 minimum cash point.