Carbon credits are one of the most misunderstood parts of the climate economy. Start with practical guides on carbon credit basics, quality, prices, registries, offsetting, CORSIA (Carbon Offsetting and Reduction Scheme for International Aviation) eligibility and investment risk.
Start here
If you are new to carbon markets, start with how carbon credits work, then read the quality checklist and prices guide. Buyers should prioritise quality, claims and retirement evidence. Project developers should pay close attention to standards, eligibility and demand signals.
Carbon credit guides to read first
| Guide | Best for | What it helps you understand |
|---|---|---|
| How carbon credits work | First-time readers | The difference between removals, reductions, avoidance claims, registries, retirement and offsetting. |
| Carbon credit quality checklist | Buyers and sustainability teams | Additionality, permanence, leakage, baselines, monitoring, verification and claims risk. |
| Carbon credit prices in 2026 | Market watchers and procurement teams | Why credit prices vary by project type, vintage, standard, quality and buyer demand. |
| Carbon credit prices guide | Buyers who want live pricing context | Auto-updating TCW (The Carbon Workbench) price guide, project-type ranges, buyer notes and links to deeper price analysis. |
| Gold Standard vs Verra vs Puro.earth | Buyers comparing standards | How major registries differ and why methodology choice matters. |
| Voluntary carbon market in 2026 | Carbon market analysts | Market recovery, buyer confidence, quality segmentation and demand trends. |
| Carbon offsetting for UK businesses | SMEs and operators | When offsetting is useful, when it creates greenwashing risk and how to phrase claims carefully. |
| CORSIA guide | Aviation and compliance readers | How aviation demand and eligible emissions units affect carbon credit quality and supply. |
| Carbon credits as an investment | Investors | Why carbon credit exposure is risky, specialist and not the same as buying normal funds. |
What makes carbon credits difficult?
Carbon credits look simple on the surface: one credit usually represents one tonne of carbon dioxide equivalent. The hard part is proving that the tonne is real, additional, durable, measured properly and not claimed twice. That is why carbon credit quality depends on the project, methodology, baseline, monitoring data, verification body, registry record and the wording of the buyer's public claim.
The market is also split between very different credit types. A cookstove credit, forestry credit, renewable energy credit, biochar removal credit and direct air capture removal credit can all be described as carbon credits, but they do not carry the same risk profile, cost, durability or buyer use case.
Buyer decision path
A good carbon credit purchase starts with the claim, not the price. A company making an internal climate contribution can use a wider range of project types than a company making a public carbon neutral or net zero-related claim. Once the claim is clear, buyers should compare project type, standard, methodology, vintage, retirement evidence and quality risk.
| Decision | Why it matters | Useful guide |
|---|---|---|
| Claim type | Determines the minimum quality threshold and wording risk. | Carbon offsetting for UK businesses |
| Credit type | Reduction, avoidance and removal credits carry different risk profiles. | How carbon credits work |
| Price range | Cheap credits can be legitimate, but low price often signals higher scrutiny. | Carbon credit prices guide |
| Quality evidence | Additionality, permanence, leakage and retirement records support credibility. | Carbon credit quality checklist |
| Eligibility | Aviation and compliance-style use cases may require specific eligible units. | CORSIA guide |
Priority questions for buyers
- Is the credit a reduction, avoidance or removal?
- Which registry and methodology issued the credit?
- What evidence supports additionality?
- How is permanence handled?
- Could leakage reduce the climate benefit?
- Has the unit already been retired or claimed?
- Is the public claim reduction-led, contribution-led or offset-led?
- Does the credit need CORSIA, Article 6 or other eligibility?
Live price guide via The Carbon Workbench
Useful source links
- ICVCM Core Carbon Principles
- VCMI Claims Code of Practice
- ISO 14068-1 carbon neutrality
- Oxford Principles for Net Zero Aligned Carbon Offsetting
Bottom line
Carbon credits can be useful, but only when they are treated as a quality-sensitive instrument rather than a commodity. Start with the climate claim you want to make, then work backwards to the evidence required, the price you can defend and the retirement record you can show.