The median asking price per tonne across projects with credits available right now, grouped by project category.
| Category | Lowest | Median | Supply | Projects |
|---|---|---|---|---|
| Blue Carbon | $37.80 | $229 | 4.1K | 3 |
| Biochar | $137 | $137 | 436 | 2 |
| Agriculture | $61.60 | $71.40 | 5.0K | 2 |
| Waste Disposal | $14.00 | $17.50 | 23K | 2 |
| Forestry | $0.798 | $6.94 | 165K | 17 |
| Energy Efficiency | $1.02 | $1.12 | 492K | 3 |
| Other | $0.100 | $0.826 | 234K | 15 |
| Industrial Processing | $0.728 | $0.728 | 274K | 1 |
| Renewable Energy | $0.100 | $0.686 | 4.0M | 46 |
Source: Carbonmark public API. Prices are on-chain asking prices for tokenised credits, not a whole-market index.
The live cost to retire one tonne from each carbon class on Klima Protocol, shown with the credit available in that class.
| Carbon class | Category | Price / tonne | Available |
|---|---|---|---|
| Ocean Alkalinity Enhancement | Blue Carbon | $911 | 9 |
| Biochar | Biochar | $98.64 | 187 |
| Regen Network - City Forest Credits | City Forest Credits | $21.33 | 6.2K |
| 0x67cbbf776bff742178693f5156c5f814c274ae14 | Unknown | $5.24 | 467 |
| Solar PV - Small Scale | Solar Energy | $0.170 | 74K |
| Wind Energy - Small Scale | Wind Energy | $0.142 | 224K |
Source: Klima Protocol retirement API. These are automated market maker spot prices for a one-tonne retirement: they move inversely with how much credit is left in a class, so a heavily supplied class prices well below the wider market. They are a protocol price, not a market benchmark.
Credits retired across the off-chain registries we track, by registry. Retirement is the point a credit is permanently used and can no longer be traded.
Incomplete data. ACR, Gold Standard and Verra have stopped reporting into our collection, so recent periods understate the market and the shares shown are not representative of it.
| Registry | Tonnes | Share |
|---|---|---|
| ICR | 38,839 | 52.5% |
| Climate Neutral Now | 35,134 | 47.5% |
Compiled from public registry retirement records, reported from a July 2026 baseline — coverage before that is inconsistent enough that charting it would misrepresent the trend. The most recent period is still in progress.