Why do tokenised credits sometimes trade at a different price?

Tokenised credits are bridged into on-chain carbon pools like BCT or NCT, which set a pool floor price. Generic, older, or lower-quality vintages often clear near that floor, while premium nature-based or recent vintages can trade above it, creating a price gap versus the OTC spot.

What is the difference between retiring on a registry and retiring on-chain?

Registry retirement permanently cancels the credit in the issuing registry such as Verra. On-chain retirement burns a tokenised version (for example via Toucan) and records the retirement on a public blockchain, which gives an immutable, instantly verifiable proof but adds bridge, pool, and gas costs.

Does this tool fetch live prices?

No. You enter the current OTC price yourself from your broker or a market data source. The tool then applies methodology and vintage multipliers and adds your pool premium and gas estimate so you can model the comparison without any live API.

What is a carbon pool premium?

When credits are deposited into a pool token you may pay a small premium or fee over the underlying credit price for the liquidity and standardisation the pool provides. Typical premiums range from a few percent to around ten percent depending on the pool and credit quality.

Are older vintages worth less?

Generally yes. Buyers and pools often discount pre-2018 vintages because methodologies and additionality scrutiny have tightened. The tool applies a vintage discount so older credits show a lower expected clearing price than recent issuances.

What is the ReFi Tokenised Carbon Credit Equivalence Calculator?

Enter project type, vintage, Verra or Gold Standard methodology, OTC market price, and tonnes to compute the expected price range, on-chain retirement cost via Toucan-style carbon pools, and the total cost differential versus a registry retirement. It runs free in your browser on Gera Tools, with nothing uploaded.

ReFi Tokenised Carbon Credit Equivalence Calculator

Name: ReFi Tokenised Carbon Credit Equivalence Calculator
Creator: Gera Tools
License: https://creativecommons.org/licenses/by/4.0/

ReFi (regenerative finance) bridges voluntary carbon credits onto public blockchains so they can be retired transparently and used in on-chain climate applications. But the economics of buying and retiring a tokenised credit differ from a traditional registry retirement. This calculator estimates the expected clearing price for your credit, the cost of an on-chain retirement, and the total differential versus retiring directly on the registry.

How it works

The expected price applies two multipliers to your entered OTC base price:

expected price  = OTC base × methodology multiplier × vintage factor
registry total  = expected price × tonnes
tokenised total = (expected price × (1 + pool premium)) × tonnes + gas
differential    = tokenised total − registry total

Nature-based and recent-vintage credits carry higher methodology multipliers because they command quality premiums; older vintages get a discount factor. The pool premium models the spread you pay to acquire a standardised pool token, and the gas estimate covers the bridge and retirement transactions.

What the two retirement paths look like in practice

Registry retirement (traditional): You buy credits directly from a broker or exchange at the OTC price, instruct the registry (Verra, Gold Standard, etc.) to retire the serial numbers on your behalf, and receive a retirement certificate. This is immediate, well-understood, and creates an auditable record in the registry’s public database. The cost is the credit price plus broker commission. Gas and blockchain infrastructure are not involved.

On-chain retirement (tokenised / ReFi path): Credits are first bridged onto a blockchain via a protocol like Toucan. During bridging they are retired in the source registry and replaced by an equivalent token in a carbon pool (for example BCT for base carbon tonnes, NCT for nature-based credits). You acquire pool tokens, then call a retirement transaction that permanently burns the token and records the beneficiary and reason on-chain. The retirement is immediately verifiable by anyone with the blockchain address.

Factors that affect the price comparison

Methodology quality: REDD+ avoided-deforestation, improved cookstoves, and avoided-methane credits from well-audited projects typically carry higher OTC premiums than generic renewable energy certificates. The pool’s gateway criteria determine which methodologies can be deposited.

Vintage discount: Credits issued in older years (generally pre-2018) are discounted in both the OTC market and in pool eligibility criteria because methodologies and additionality standards were less rigorous. More recent vintages from the same project type clear at higher prices.

Pool premium and liquidity: Acquiring BCT or NCT tokens means paying the pool’s market rate, which includes a small liquidity and standardisation premium over the raw credit price. This premium fluctuates with DeFi market conditions and demand for on-chain carbon.

Gas costs: Bridging and retiring on-chain requires one or more blockchain transactions. For large lots (thousands of tonnes), gas is a minor cost relative to the credit value. For small lots (10–50 tonnes), gas can represent a meaningful overhead — often the dominant overhead.

Worked example

Suppose you want to retire 200 tonnes of a 2021 Gold Standard solar cookstove credit:

OTC base price: $9 per tonne
Methodology multiplier: 1.10 (Gold Standard cookstove premium)
Vintage factor: 0.97 (slight discount for 2021 vintage)
Expected price: $9 × 1.10 × 0.97 = $9.61 per tonne
Registry total: 200 × $9.61 = $1,922
Pool premium: 4%
Gas estimate: $12
Tokenised total: (200 × $9.61 × 1.04) + $12 = $2,012
Differential: $2,012 − $1,922 = $90 more for on-chain

For this lot, the on-chain path costs about 4.7% more — a small premium for an immutable, publicly verifiable retirement record. For a corporate buyer needing transparent climate disclosures, that tradeoff may be worthwhile.

Eligibility and pool gateway rules

Not all credits can be bridged. Pools enforce entry criteria:

BCT (Toucan Base Carbon Tonne): accepts a broad range of Verra VCS credits but enforces minimum vintage years.
NCT (Toucan Nature Carbon Tonne): restricted to nature-based solutions (REDD+, reforestation) with a minimum vintage requirement.

Credits that do not meet the gateway criteria cannot be deposited and cannot be retired on-chain. Verify eligibility before building it into a procurement plan.