Biogas Plant Break-Even Analysis: $142K Monthly Revenue

Fixed costs $114.6K/mo Current overhead

Contribution margin 80.1% After variable costs

Break-even revenue $143K/mo Monthly target

Break-even timing Month 1 Launch month

Break-even calculator

Test monthly revenue, variable expenses, and fixed costs to see when a biogas plant clears break-even.

Lean Base Full

Monthly revenue Revenue is the cash coming in each month, and it has to cover direct costs plus fixed overhead. $ Low run High run Variable expenses These are direct costs that rise with output, like feedstock handling, processing, transport, and selling fees. $ Tight cost Heavy cost

Money available to cover fixed costs $1,931,169 $2,347,917 revenue - $416,748 variable expenses

Margin ratio

82%

Covers fixed costs

Yes

Fixed monthly costs These are the monthly overhead costs the plant must cover before profit starts. $ Lean overhead Heavy overhead

Break-even chart Revenue Total costs

Which biogas plant expenses are fixed and which move with sales?

Cost classification

Your break-even model is only useful if fixed overhead stays fixed and throughput costs scale with units or credit revenue. Misclassifying plant labor, utilities, or compliance spend can make Month 1 break-even look safer than cash reality.

Expense	Cost	Break-Even Treatment	Common Mistake
Facility Lease	Fixed	Use $25,000 per month from Month 1 through Month 60 in the monthly overhead base.	Tying lease expense to renewable natural gas output or fertilizer volume.
Property Insurance	Fixed	Use $5,000 per month as stable overhead within the relevant planning range.	Modeling insurance as a percentage of revenue.
Permitting & Compliance Fees	Fixed	Use $7,500 per month as recurring base compliance overhead.	Mixing base permit fees with credit audit fees that move with credit activity.
Management, engineering, admin, and compliance payroll	Semi-fixed	Treat salaried roles as step-based overhead; staffing stays mostly stable, but some roles move from 0.5 FTE to 1.0 FTE after the first year.	Treating every payroll dollar as fixed forever.
Plant Operator payroll	Semi-fixed	Model headcount in steps: 2.0 FTE in the first year, 3.0 FTE in Year 2, and 4.0 FTE by Year 3.	Spreading operator wages as a smooth per-unit charge.
Renewable natural gas feedstock, direct labor, processing energy, water treatment, and chemicals	Variable	Apply the unit costs to renewable natural gas output; the listed items total $3.00 per unit before revenue-based processing percentages.	Putting processing energy into fixed base utilities.
Feedstock Transportation	Variable	Apply as a revenue-linked expense: 5.0% in the first year, declining to 3.0% by Year 5.	Holding hauling expense flat while throughput doubles.
Credit verification, brokerage, registry, and audit fees	Variable	Model Renewable Identification Number and Low Carbon Fuel Standard credit costs against credit units and related credit revenue.	Grouping all compliance-related spend into fixed overhead.

How does break-even change across lean, base, and full biogas plant scenarios?

Scenario table

Higher output lifts revenue faster than fixed cost growth, so break-even gets easier as the plant scales. The main swing factors are secured feedstock, uptime, and credit sales visibility.

Planning-only estimates. They depend on feedstock supply, uptime, and credit sales, and they exclude tipping fee revenue.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean ramp case	$629.2k	$124.7k	$113.6k	80.2%	$390.9k	Month 1 break-even is covered, but the cash build is still heavy.
Base ramp case	$1.29M	$243.7k	$126.3k	81.1%	$920.0k	The margin stays comfortable, so feedstock and uptime matter more than price.
Full-scale case	$2.35M	$416.8k	$137.1k	82.3%	$1.79M	This is the widest cushion, assuming credit sales and throughput stay steady.

What stress case cuts the break-even cushion fastest for this biogas plant?

Stress test

The current plan clears break-even with a wide cushion, but the room for error shrinks fast if revenue falls, overhead rises, or plant uptime slips. The combined case is the tightest downside path.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change.	$1,417K	$4,875K cushion	Healthy cushion if output and pricing hold.
Revenue shortfall	Monthly revenue falls 20% while margin holds.	$1,417K	$3,616K cushion	Weaker energy or credit pricing trims the cushion.
Fixed-cost pressure	Fixed monthly costs rise 15% to about $1,306K.	$1,628K	$4,664K cushion	Higher overhead cuts room for a slow ramp.
Margin pressure	Contribution margin drops 5 points to 75.2%.	$1,511K	$4,781K cushion	Higher hauling, maintenance, or downtime raises break-even risk.
Combined pressure	Fixed costs rise 15% and contribution margin drops 5 points.	$1,738K	$4,554K cushion	This is the tightest downside case if feedstock flow weakens.

What should you verify before you sign the lease and order the digester?

Founder checklist

Before you lock in the site or major equipment, confirm the feedstock, offtake, and utility pieces are real, not assumed. This model shows Month 1 operating breakeven, but cash still bottoms at negative $33.9M in Month 12, so runway is the real gate.

1FeedstockMonth 1

Verify inbound organic waste is locked before the lease, because the plant only works if feedstock arrives steadily from day one.

2Interconnect$4.0M

Verify utility tie-in and interconnection capacity before this spend, because RNG revenue depends on moving gas off site.

3Unit Margin67.5%

Verify the main RNG line still clears variable costs, because $15.00 selling price only works if the cost stack stays close to the model.

4Offtake Demand$7.55M

Verify buyers and credit paths for Year 1 output, because the model counts 100,000 RNG units, 500,000 liquid units, 10,000 solid units, 100,000 RIN credits, and 50,000 LCFS credits.

5Fixed Load$113.6K/mo

Verify monthly overhead and payroll can be carried at launch, because fixed costs are about $48.8K per month and Year 1 payroll is $777.5K, then payroll rises to about $1.06M in Year 3.

6Cash Cushion-$33.9M

Verify you can fund the Month 12 trough, because minimum cash reaches negative $33.893M even though operating breakeven shows up in Month 1.