Biochar Feasibility Calculator

A biochar project can look attractive for the wrong reasons. Developers often start with premium removal pricing, then work backwards. The better sequence is to start with realistic feedstock, yield, deductions, opex and capex, then see whether the commercial case still holds. That is what a biochar feasibility calculator is for.

A feasibility screen should be conservative. If the project only works with aggressive throughput, premium pricing and almost no deductions, that is not a strong case. A useful first-pass model should survive less flattering assumptions.

What this biochar feasibility model is testing

How much wet biomass can actually move through the plant in a normal operating year.
How moisture, yield and fixed-carbon content affect annual biochar output and net removals.
How process, logistics, permanence and creditability deductions change the number that can actually be monetised.
Whether carbon revenue plus biochar product sales comfortably clear feedstock, opex and capex.
How long the project takes to pay back once realistic revenue realisation is included.

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Biochar Feasibility Modeller

This is the same calculation chain used in the main product, rendered directly in the article so you can test assumptions while you read.

Plant throughput

t wet feedstock / yr

Annual wet feedstock throughput should reflect realistic delivered biomass across a working year, not theoretical nameplate kiln capacity.

Feedstock type Wood chip / sawdust

Wood residues usually support a stable commercial case: reliable yields, decent fixed-carbon content, and relatively straightforward logistics.

Plant uptime90%

Account for maintenance, commissioning delays and feedstock gaps. Real plants rarely operate at perfect availability.

Moisture content15%

Delivered moisture matters because it affects dry throughput and the amount of useful biomass entering the carbon chain.

Biochar yield from dry biomass28%

Carbon content of produced biochar70%

Carbon assumptions

Process emissions deduction15%

Logistics & application deduction4%

Permanence discount10%

Creditable share of net removals95%

Commercial inputs

Delivered feedstock cost£35/t

Variable operating cost£22/t

Annual fixed opex£220k

Upfront capex£1.20m

Carbon credit price£90/t

Biochar product sale price£180/t

Project life15 yr

Transparent assumptions Visible defaults you can amend directly.

C → CO₂e conversion factor

ratio

Revenue realisation factor

% of modelled revenue

Results

Annual Net Project Cashflow

GBP / year

Wet throughput processed-

→Dry throughput-

→Biochar output-

→Net creditable removals-

Carbon revenue-

Biochar sales revenue-

Feedstock cost-

Variable opex-

Fixed opex-

Annual project cashflow-

Commercial outputs

Lifetime net cash after capex-

Payback period-

Margin per tCO₂e-

Margin per tonne biochar sold-

Formula chain

Annual net removals = wet throughput × uptime × (1 − moisture) × yield × carbon × C→CO₂e × (1 − process) × (1 − logistics) × (1 − permanence) × creditable share.

Annual cashflow = (carbon revenue + biochar sales revenue) × revenue realisation − feedstock cost − variable opex − fixed opex.

Use the full tool in The Carbon Workbench for saved cases, branded PDF reports, screening handoff and easier comparison against pricing and verification-cost tools.

Open the full Biochar Feasibility Modeller →

How to interpret the outputs

Start with removals quality, not just price

If net creditable removals look strong only because deductions are unrealistically low, the commercial case is fragile. A better project survives reasonable process, logistics and permanence discounts.

Watch annual cashflow and lifetime cash together

A project can have positive annual operating economics and still struggle once capex is included. That is why the model shows both annual project cashflow and lifetime net cash after capex.

Payback matters because financing matters

Even if a plant looks profitable over fifteen years, a long payback period can make it difficult to finance or justify against other uses of capital. A first-pass biochar feasibility model should surface that immediately.

What to pressure-test next

Verification and registry costs for the likely methodology route.
Whether biochar product sales are truly bankable or still speculative.
How much the case changes if credit price or throughput is 10 to 20 percent lower than expected.
Whether feedstock seasonality should reduce uptime more than the initial model suggests.

Go from first-pass screen to a fuller project case

Pair the biochar feasibility model with verification costs, methodology fit and the broader biochar economics guides to build a more defensible commercial view.