Project evidence
Feedstock provenance, production records and evidence of eligible biochar use.
CapChar methodology
Biochar Carbon Code.
The Biochar Carbon Code (BCC) is CapChar's published UK biochar carbon removal methodology. It sets out how eligible projects quantify, document and verify durable carbon removal through biochar production and use, providing the basis for issuing Biochar Carbon Units.
Use the published code.
The published methodology sets out the requirements a project must meet. This page is an introduction; the code contains the detailed rules.
Published version: V1.1 — 5 January 2026.
Originally launched on 16 January 2025. The initial public consultation closed on 15 February 2025.
Download the published code ↗What the methodology covers.
Sampling and testing
The laboratory and sampling requirements needed to characterise the biochar and quantify its carbon content.
Carbon accounting
The treatment of stored carbon and relevant project emissions when calculating eligible removal.
The code, dMRV and registry work together.
The BCC provides the methodology. CapChar’s beta dMRV supports the collection of project evidence. The public registry records Biochar Carbon Unit transactions and retirements.
Developing a project under the BCC?
Talk to us about your technology, feedstock, proposed biochar end use and recording approach. The relevant published requirements determine project eligibility and issuance.
Discuss BCC requirements ↗Practical questions
Common questions.
Which published BCC version applies?
This page links to BCC V1.1, published on 5 January 2026. The published code contains the detailed requirements; proposed future revisions are not current rules.
Does the website summary replace the code?
No. The website introduces the methodology. The relevant published code determines detailed project requirements and carbon accounting.