Fees

Overview of certification and credit issuance fees associated with the Rainbow Standard and Tech Infrastructure.

The platform and registry fees for carbon credit certification are structured according to the types of credits (avoidance, removal and durability), the methodology used, and the annual volume of credits issued.

Rainbow does not charge extra for opening, closing, or reactivating accounts.

Rainbow does not charge additional costs for retirement, transfers or API connections.

Platform fees

Platform fees cover the cost for registration and certification operations (pre-validation, validation and verification), they are paid by the Project Developer to Rainbow unless otherwise specified.

Platform fees varies depending on the methodology:

• Category A, durable removals:

  • Biomass carbon removal and storage (BiCRS)

  • Mineralization of alkaline materials (ex-situ)

  • Enhanced Rock Weathering

• Category B, avoidance and other removals:

  • Biobased construction materials

  • Biogas from anaerobic digestion

  • Refurbishing of electronic devices

  • Battery second life

Fees	Removal - Category A	Avoidance - Category B
Pre-validation (optional)	5,000€ per project per year	NA
Subscription	5,000€ per year to subscribe to the platform for 1 carbon project with 1 site	7,500€ per year to subscribe to the platform for 1 carbon project with 1 site
Additional site	Additional sites within a projet: from 500 to 2,500€ per additional site, depending on the number of sites	+2,500€ for any additional site within a project
Validation	Included	Included
Verification	see table below	2,500€ per year per verification per site

Validation fees

The annual subscription includes the validation audit with remote site audit. When the on-site visit is required for the site audit, the specific audit fee will be determined in collaboration with the third-party auditor, based on the Validation audit requirements applied to the project's context.

This fee is contingent upon the complexity of the project and whether an on-site visit is deemed necessary, and is paid directly to the third-party VVB, typically between 1,000€ and 5,000€ depending on the location.

Verification fees

Frequent issuance is possible for certain removal methodologies. The following fees apply:

Methodology	1st verification within 12 months	2nd verification within 12 months	From 3 verification within 12 months
BiCRS	2,500€	2,500€	1,500€
Biobased Construction Materials	2,500€	2,500€	1,500€
Enhanced Rock Weathering	10,000€	5,000€	5,000€
Mineralization of alkaline materials	5,000€	2,500€	1,500€

Credit issuance fee

The fee per Rainbow Carbon Credit (RCC) is set at fixed tiers based on the cumulative volume of RCCs transferred, from the Project Developer account, over the past 12 months. The price per credit decreases only when the total issued and transferred volume (for all listed projects) exceeds a predefined threshold.

Projects may issue one or multiple type of credits. The credit issuance fee details below apply separately for each credit type.

Avoidance RCCs

For avoidance credits, the credit issuance fees depend on the project's methodology:

Avoidance - Category 1

• Biogas from anaerobic digestion

• Biobased Construction Material

Avoidance - Category 2

• Refurbishing of electronic devices

• Battery Second Life

• Mineralization of alkaline materials (ex-situ)

• Biomass carbon removal and storage

• General Requirements (Standard V6.2 and below only)

Volume (yearly)	Price per credit - Category 1	Price per credit - Category 2
From 1 to 50,000 credits	2€ per credit	3€ per credit
50,001 to 100,000 credits	1.75€ per credit	2.5€ per credit
Above 100,000 credits	1.5€ per credit	2€ per credit

Removal RCCs

For removal credits, the credit issuance fees depend on the durability claimed:

Volume (yearly)	Price per credit, with durability <1000 years	Price per credit, with durability ≥1000 years
From 1 to 20,000 credits	7.5€ per credit	10€ per credit
20,001 to 50,000 credits	5€ per credit	8€ per credit
50,001 to 100,000 credits	4€ per credit	7€ per credit
100,001 to 200,000 credits	3€ per credit	6€ per credit
Above 200,001 credits	2€ per credit	4€ per credit