Marine Bunkering Break-Even Analysis: $293K Monthly Threshold

Fixed costs $235.7K/mo Year 1 overhead

Contribution margin 78.5% After variable costs

Break-even revenue $300.0K/mo Sales to cover costs

Break-even timing Month 1 Launch month

Break-even calculator

Test whether monthly revenue covers direct variable costs and the fixed monthly cost base.

Lean Base Full

Monthly revenue Revenue is the pool that covers direct costs and fixed overhead. $ Low sales High sales Variable expenses These rise with activity, like fuel, port fees, testing, and brokerage. $ Low costs High costs

Money available to cover fixed costs $720,833 $895,833 revenue - $175,000 variable expenses

Margin ratio

80%

Covers fixed costs

Yes

Fixed monthly costs These are the monthly costs that contribution margin must cover. $ Lean setup Heavy setup

Break-even chart Revenue Total costs

Which bunkering expenses are fixed, and which move with sales volume?

Cost classification

Break-even is reliable only when revenue-linked fees stay out of fixed overhead. Here’s the quick math: the first-year variable stack is 19.5% before monthly overhead and staffing.

Expense	Cost	Break-Even Treatment	Common Mistake
Regional Operations Hub Lease	Fixed	Include $18,500 per month from Month 1 through Month 60 as base overhead.	Spreading lease per delivery and making break-even look better as volume rises.
Maritime Liability and Pollution Insurance	Fixed	Include $45,000 per month as required monthly protection, not tied to transfer count.	Moving insurance into per-job expense and understating fixed cash needs.
Fuel Quality Testing and ISO Certification	Variable	Subtract 4.5% of first-year revenue, declining to 3.5% by Year 5.	Treating testing as fixed when more bunkering volume creates more testing work.
Port Authority Throughput Fees	Variable	Subtract 5.5% of first-year revenue, declining to 4.7% by Year 5.	Holding port fees flat even though they move with throughput.
Barge Operational Fuel and Consumables	Variable	Subtract 6.5% of first-year revenue, declining to 5.5% by Year 5.	Modeling barge fuel as overhead instead of usage-linked delivery expense.
Sales Commissions and Brokerage Fees	Variable	Subtract 3.0% of revenue in each year before calculating contribution margin.	Booking brokerage as fixed sales payroll and overstating margin at scale.
Crew Overtime, Detour Fuel, and Emergency Dispatch Support	Semi-variable	Keep base crew in payroll, then add usage charges when urgent jobs or route changes occur.	Ignoring surge labor and detour fuel until margins miss plan.
Added Captain Crews, Extra Barge Capacity, and Expanded Port Access	Semi-fixed	Add capacity in steps as volume grows; captain staffing rises from 2.0 FTE in the first year to 6.0 FTE in Year 5.	Treating added capacity as perfectly variable per job instead of step increases.

How does break-even shift from lean to base to full marine bunkering volume?

Scenario table

Here’s the quick math: more volume spreads the fixed base across more sales. The lean case is near zero profit, the base Year 1 plan leaves about a $485K monthly cushion, and the full case widens that gap.

Planning case only; actual margins will move with fuel mix, port fees, and staffing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean launch control case	$293K	$57K	$236K	80.5%	$0K	Near break-even, so small volume dips matter.
Base Year 1 plan	$896K	$175K	$236K	80.5%	$485K	Clear cushion, but steady port density still matters.
Full Year 5 expansion case	$4,075K	$681K	$412K	83.3%	$2,982K	Scale gives a strong cushion and lowers break-even risk.

What breaks the break-even plan for a marine bunkering service?

Stress test

At the base plan, monthly revenue of about $896K sits well above a break-even point near $293K, so there is room. The real risk is a 20% revenue drop, a 5-point margin slide, and a 15% fixed-cost overrun hitting at once.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$293K	$603K cushion	Strong opening-month buffer.
Revenue down	Monthly revenue drops 20%.	$293K	$424K cushion	Still profitable, but the cushion shrinks fast.
Fixed costs up	Fixed costs run 15% higher.	$337K	$559K cushion	Overhead control matters more at this level.
Margin squeeze	Variable expenses rise by 5 points.	$312K	$584K cushion	A lower margin trims room for error.
All three hit	Revenue falls 20%, variable expenses rise 5 points, and fixed costs rise 15%.	$359K	$358K cushion	If monthly revenue slips below about $359K, losses begin.

What should a marine bunkering founder verify before committing to barges and crews?

Founder checklist

Before you lock in barges, crew, and fuel inventory, prove the Year 1 load can carry the $235.7K monthly fixed burn and the -$1.431M cash trough in Month 10. The model breaks even in Month 1, but only if signed volume and route density are real.

1Booked volume$10.75M Y1

Verify signed supply and customer liftings before you buy fuel, because the first-year revenue plan only works if the opening volume is already committed.

2Fixed load$235.7K/mo

Check that cash can carry the combined fixed overhead and Year 1 wages each month, since this burn starts before scale shows up.

3Margin floor80.5% CM

Hold route density and service mix high enough to protect this contribution margin, or fuel, port, and brokerage costs will push break-even out.

4Crew ramp13 FTE

Match captains, crew, dispatch, and compliance staff to contracted volume, not hoped-for volume, so labor does not outrun bookings.

5Cash trough-$1.431M

Fund the Month 10 cash dip with reserve money, because the early break-even result still hides a deep launch-period draw.

6Rapid response400 jobs

Prove dispatch coverage and fast-response sales at the Year 1 level before adding more capacity, so route density protects the 80.5% margin.