Scuba Diving Rental Break-Even: About $616K Monthly Revenue

Fixed costs $41.4K/mo Monthly overhead base

Contribution margin 87.5% After variable spend

Break-even revenue $47.4K/mo Needed to cover costs

Break-even timing Month 18 Forecast break-even point

Break-even calculator

See how monthly revenue, direct costs, and fixed overhead shape break-even for a scuba gear rental business.

Lean Base Full

Monthly revenue Revenue sets the margin left after direct costs. $ Slow month Busy month Variable expenses Direct costs that rise with each rental. $ Low cost High cost

Money available to cover fixed costs $6,825 $7,800 revenue - $975 variable expenses

Margin ratio

88%

Covers fixed costs

$34,575 short

Fixed monthly costs This is the monthly overhead break-even must cover. $ Lean overhead Heavy overhead

Break-even chart Revenue Total costs

Which scuba rental expenses stay fixed, and which move with sales?

Cost classification

Break-even is reliable only if overhead is kept separate from per-rental activity. Here, the model reaches break-even in Month 18, so misclassifying insurance, support, or replacement reserves can shift that target fast.

Expense	Cost	Break-Even Treatment	Common Mistake
Office Rent	Fixed	Use $3,500 per month as overhead before counting rental margin.	Tying rent to order volume instead of capacity.
Platform Hosting & Software	Fixed	Use $2,500 per month as baseline platform overhead.	Moving all software into per-rental fees.
Legal & Compliance Retainer	Fixed	Use $1,200 per month as recurring compliance overhead.	Dropping it below contribution margin.
Accounting & Audit Fees	Fixed	Use $1,000 per month as fixed finance overhead.	Treating recurring accounting as a launch-only item.
Transaction Processing Fees	Variable	Apply 2.5% in the first year, then the lower model rates by year.	Ignoring payment fees when estimating contribution margin.
Insurance Premiums	Variable	Apply 5.0% in the first year because the model links premiums to activity.	Treating all insurance as fixed overhead.
Customer Support per Transaction	Variable	Apply 3.0% in the first year as order-linked support load.	Counting support only as payroll and missing per-order work.
Fleet Replacement Reserve	Semi-fixed	Add in steps when gear capacity or rental volume forces replacement planning.	Spreading replacement spend flat across every month.

How does break-even change from a lean launch to a full scuba gear rental setup?

Scenario table

As staffing, marketing, and storage expand, fixed costs rise faster than the margin improves, so monthly break-even revenue climbs from about $616K in the lean setup to about $1.05M in the full setup. That's the real hurdle.

Planning numbers only; actual results can move the break-even point.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch structure	$616K	$77K	$539K	87.5%	$0	Any weak month slips below break-even fast.
Base Year 2 structure	$740K	$88K	$652K	88.1%	$0	This is the main hurdle; cost control matters most.
Full Year 3 scaled structure	$1.05M	$116K	$931K	88.9%	$0	Scale helps, but the heavier cost base still needs strong volume.

What breaks first if bookings slow, servicing costs rise, or overhead keeps creeping up?

Stress test

This plan breaks first if bookings slip, costs rise, or overhead keeps climbing. A 20% revenue miss creates about a $108K operating gap, and either a 10% overhead jump or margin squeeze pushes break-even higher fast.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$616K	$0 gap	Baseline leaves no cushion.
Revenue shortfall	Revenue runs 20% below break-even.	$493K	$108K gap	A small booking miss turns into a six-figure hole.
Fixed-cost pressure	Overhead is 10% higher.	$678K	$54K gap	Overhead creep bites, and break-even moves up fast.
Margin pressure	Variable costs rise, cutting contribution margin to 82.5%.	$654K	$31K gap	Margin pressure alone is manageable, but room gets thin.
Combined pressure	Revenue is 20% below plan, margin is 82.5%, and overhead is 10% higher.	$719K	$187K gap	Two hits at once create a material operating loss.

What should you verify before you sign a lease and buy scuba rental gear?

Founder checklist

Don't sign the lease or buy gear until you can support about $616K in monthly revenue and still keep at least $240K of cash through Month 17. Breakeven lands in Month 18, so the early burn has to fit the runway.

1Demand proof$616K/mo

Verify bookings and partner leads can reach this revenue level before you commit, because the model does not break even until Month 18.

2Fixed load$41.4K/mo

Check that Year 1 rent, software, legal, supplies, utilities, cybersecurity, accounting, analytics, and core wages fit this burn, or cash pressure rises fast.

3Order margin$18.65/order

On the Year 1 weighted mix, a $91 order brings about $18.65 in commission revenue and leaves about $7.28 after order-linked costs, so the take rate has to hold.

4Gear cycle$8K test gear

Map cleaning, inspection, repair, retirement, and storage rules before you buy more inventory, because rental wear and loss can wipe out margin fast.

5Hiring rampMonth 25+

Keep staffing tight until repeat rentals prove demand, since the model delays the next full-time role until Month 25 and adds more later in Month 37.

6Cash floor$240K

Hold at least this much cash through Month 17, because that is the model low point before breakeven in Month 18.