Biogas Production Break-Even Analysis: $147K Monthly Revenue

Fixed costs $111.9K/mo Site and labor

Contribution margin 77% After variable costs

Break-even revenue $145K/mo Monthly target

Break-even timing Month 1 Launch month

Break-even calculator

Test monthly revenue, variable expenses, and fixed costs against the break-even point for a biogas plant.

Lean Base Full

Monthly revenue Revenue is the cash pool that pays variable costs and fixed overhead. $ Low sales High sales Variable expenses These are direct costs tied to gas, digestate, and credit sales. $ Lower costs Higher costs

Money available to cover fixed costs $932,630 $971,938 revenue - $39,308 variable expenses

Margin ratio

96%

Covers fixed costs

Yes

Fixed monthly costs These are the monthly plant and payroll costs break-even must cover. $ Lean base Heavier base

Break-even chart Revenue Total costs

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

Cost classification

Break-even is reliable only when plant overhead is separated from volume-driven spending. For this model, insurance and lease costs sit still, but transportation, verification, testing, and brokerage move with RNG, RIN, LCFS, offset, or biofertilizer volume.

Expense	Cost	Break-Even Treatment	Common Mistake
Plant Insurance	Fixed	Include $15,000 per month in overhead from Month 1 through Month 60.	Spreading it per RNG MMBtu and making break-even look easier at higher volume.
Land Lease	Fixed	Include $10,000 per month as a stable site expense within the monthly planning range.	Treating the lease like a production input instead of a baseline cash obligation.
Feedstock Transportation	Variable	Apply $2.50 per RNG MMBtu because hauling rises with processed organic waste volume.	Parking transportation in overhead and understating the margin hit from added throughput.
Upgrading and Purification	Variable	Apply $1.50 per RNG MMBtu as a direct processing charge tied to renewable gas output.	Using one flat monthly amount and missing how gas volume changes contribution margin.
Digestate Processing	Variable	Apply 1.5% of revenue, since digestate handling rises with biofertilizer activity.	Counting it as plant overhead and overstating biofertilizer break-even profit.
Plant Utilities	Semi-variable	Model the 1.2% of revenue charge with usage-linked power behavior as production rises.	Treating utilities as fully fixed even though load rises with operating hours.
Operations Technician	Semi-fixed	Step labor up from 3.0 FTE in the first year to 5.0 FTE by Year 3.	Adding fractional labor per unit instead of staffing in practical crew-size steps.
Third-Party Verification	Variable	Apply 0.5% of revenue for RIN D3 credit compliance activity tied to credit volume.	Treating verification as pure overhead when it moves with credit generation and sales.

How does break-even move from a lean ramp to base and full biogas output?

Scenario table

Here’s the quick math: Year 1 revenue is about $494,583/month against about $105,000 in variable costs and $116,083 in fixed costs. By Year 3, revenue is about $971,938/month, so the break-even cushion gets much wider as output and credit sales scale.

Planning assumptions only; actual break-even will move with feedstock supply, credit pricing, uptime, and compliance timing.

Scenario	Monthly Revenue	Variable Costs	Fixed Costs	CM Ratio	Operating Profit	Break-Even Signal
Lean ramp case	$494,583	$104,850	$116,083	78.8%	$273,650	Revenue is well above break-even, but it still depends on contracted feedstock and credit sales.
Year 3 base case	$971,938	$196,400	$140,250	79.8%	$635,288	This is the cleanest break-even zone; scale now covers overhead with room to absorb small price swings.
Year 5 full-capacity case	$1,173,917	$224,900	$144,833	80.8%	$804,184	Full output gives the widest cushion and makes break-even risk much lower.

What breaks this biogas plant’s break-even plan?

Stress test

The base case clears break-even, but the cushion narrows fast if feedstock intake slips, RNG or credit prices weaken, or utilities and maintenance run hot. Combined pressure pushes break-even toward $182,000 a month.

Stress Case	Changed Assumption	Break-Even Revenue	Revenue Gap	Risk Signal
Current plan	No change from the base case.	$147,000	$347,000 cushion	Base cash flow clears break-even with room to spare.
Revenue shortfall	Monthly revenue falls 20% from the base case.	$147,000	$249,000 cushion	Weak feedstock intake or lower RNG pricing cuts the buffer fast.
Fixed-cost increase	Fixed monthly spend rises 15%.	$170,000	$325,000 cushion	Higher maintenance or site overhead pushes the hurdle higher.
Margin pressure	Variable expenses rise 25%.	$158,000	$337,000 cushion	Higher utilities or slower RIN and LCFS settlement squeeze margin.
Combined pressure	Monthly revenue falls 20%, fixed monthly spend rises 15%, and variable expenses rise 25%.	$182,000	$214,000 cushion	If volume softens and costs rise together, the cushion shrinks fast.

What should the founder verify before locking the site and equipment for a biogas plant?

Founder checklist

Don’t lock the site or order long-lead gear until feedstock, off-take, interconnection, staffing, and cash all line up. The Year 1 model only works if the $5.94M revenue stack starts on time and the $1.234M cash floor holds through commissioning.

1Feedstock supply150k MMBtu

Lock feedstock supply before sizing the digester, because Year 1 output assumes 150,000 RNG MMBtu and 5,000 biofertilizer tons.

2Revenue mix79% CM

Verify buyers for RNG MMBtu, biofertilizer tons, RIN D3 credits, California Low Carbon Fuel Standard (LCFS) credits, and voluntary carbon offsets, because Year 1 revenue is about $5.94M and the mix needs roughly 79% contribution margin to fund fixed burn.

3Utility tie-inMonth 8-12

Confirm utility approval before you order grid injection infrastructure, because that scope sits on the Month 8 to Month 12 path and can push launch out.

4Fixed burn$116.1k/mo

Monthly insurance, land lease, permits, professional services, software, security, and staffed payroll total about $116.1k, so the plant needs early throughput, not just a clean build.

5Staff ramp8.5 FTE

Staff the GM, plant operations manager, technicians, biologist or chemist, compliance manager, sales and contracts, and admin roles to ramp, or the plant will miss output and credit verification.

6Cash floor$1.234M

Keep working cash above the $1.234M floor and do not assume Month 1 break-even if commissioning or credit verification slips.