Are carbon credits real? Some are, and some aren’t, and the honest answer depends entirely on which credit you’re looking at. A credit issued under a government cap-and-trade program is a legally enforceable instrument with penalties attached. A cheap voluntary offset from a forest conservation project may represent emissions reductions that never actually happened. Research published in 2024 found that 87% of offsets purchased by major companies carried a high risk of not representing real, additional emission reductions.1Nature. Demand for Low-Quality Offsets by Major Companies Undermines Climate Goals So the question isn’t whether carbon credits exist as financial instruments. They do. The question is whether any given credit delivers the ton of avoided or removed CO₂ it claims.
Compliance Credits Are Real by Law
In compliance markets, governments cap total emissions for an industry or region and distribute a limited number of allowances, each one a license to emit a set quantity of greenhouse gases. Companies that pollute less can sell their surplus; companies that exceed their cap must buy more. The government tightens the cap over time.2Legal Information Institute (LII). Cap and Trade
These credits carry real penalties. Under the EU Emissions Trading System, operators that fail to surrender enough allowances are fined €100 for every excess ton of CO₂, a figure that rises each year with inflation.3European Commission. EU ETS Monitoring, Reporting and Verification California requires a company that comes up short to surrender four allowances for every one it missed, and a state court has upheld the auction-based program, ruling that the allowances are valuable, tradable commodities.2Legal Information Institute (LII). Cap and Trade Because these credits create legal obligations and enforceable consequences, their reality isn’t seriously disputed.
Voluntary Credits Are Where the Doubts Live
The voluntary carbon market sits alongside compliance systems without a government mandate behind it. Companies and individuals buy voluntary credits to meet internal sustainability targets, net-zero pledges, or “carbon neutral” marketing claims. The global voluntary market was valued at roughly $4 billion in 2024.
No single regulator governs it. The credibility of a voluntary credit rests on private contracts between buyers, sellers, and the certification program that issued it. Ownership rights, delivery obligations, and transfer rules live in those contracts, which give buyers a legal basis to dispute a bad credit. But there’s no compliance backstop. If the underlying project didn’t actually reduce emissions, the buyer is the one holding a piece of paper.
What Makes a Voluntary Credit Real
A handful of quality tests separate a credit that stands for a real ton of CO₂ from one that doesn’t.
Additionality
This is the single most important test. A credit is additional only if the project would not have happened without the revenue from selling credits. A solar farm that was already profitable and would have been built anyway produces no additional climate benefit just because someone labels its output as an offset. The FTC’s Green Guides make the point in law: it is deceptive to claim a carbon offset represents an emission reduction if that reduction was already required by law.4eCFR. 16 CFR 260.5 – Carbon Offsets Additionality is where the most credits fail.
Permanence and Buffer Pools
A credit must represent carbon that stays out of the atmosphere long enough to matter. Some programs treat a few decades as “permanent.” Genuine permanence means hundreds or thousands of years. Where reversal is a real risk, like a forest burning down or a geological storage site leaking, certification programs require a buffer pool: developers set aside a risk-adjusted percentage of their credits in a shared reserve the registry can draw on to cover losses.5Verra. Frequently Asked Questions
Independent Verification
Under the Verified Carbon Standard, credits are issued only after an independent auditor, known as a validation/verification body, reviews the project’s data, conducts site visits, and confirms the emissions reduction actually occurred. The registry issues the credit after physical confirmation, not on a projection of future performance.6Verra. Verified Carbon Standard Without independent verification, a “credit” is just a claim.
Serialization and Retirement
Certifiers such as Verra and Gold Standard assign each credit a unique serial number in a centralized registry. Serialization prevents double counting, where the same ton of reduction is sold to two different buyers. When a buyer uses a credit to claim an offset, the registry permanently marks it as retired and removes it from circulation.7Verra. VCS Program Standard Overview8Gold Standard. Methodology
Why So Many Credits Fall Short
The safeguards exist, but the market has a credibility problem anyway. That 2024 study in Nature Communications analyzed corporate offset purchases and found that 87% carried a high risk of not representing genuine, additional reductions, with forest conservation and renewable energy projects the worst offenders.1Nature. Demand for Low-Quality Offsets by Major Companies Undermines Climate Goals The pattern is consistent: companies gravitate toward the cheapest credits, and cheap credits tend to come from projects with the weakest additionality evidence.
Forest conservation credits have drawn particular scrutiny. Investigations have found projects overestimating the threat of deforestation to inflate their baseline, then producing credits for “avoided” emissions that were never likely to occur. When the baseline is wrong, every credit issued against it represents phantom carbon. Renewable energy credits face a different version of the same problem: in many regions, wind and solar are commercially viable without carbon revenue, so those projects would be built regardless and fail the additionality test.
None of this makes carbon credits a fiction. It means a direct air capture credit backed by geological storage and third-party verification is a fundamentally different product from a $5 avoided-deforestation credit built on an inflated baseline. Buyers who treat all credits as interchangeable are the ones most likely to end up with paper offsets.
Regulators That Can Punish Fake Credits
Two federal agencies give the voluntary market some legal teeth even without a comprehensive regulatory framework.
The Federal Trade Commission’s Green Guides set specific rules for marketing carbon offsets. Sellers must use competent scientific and accounting methods to quantify claimed reductions and cannot sell the same reduction twice. It is deceptive to imply that an offset represents reductions that have already occurred if the reductions won’t materialize for two or more years, unless that timeline is clearly disclosed. And, again, it is deceptive to claim a credit represents a real reduction if the underlying activity was already required by law.4eCFR. 16 CFR 260.5 – Carbon Offsets
The Commodity Futures Trading Commission has asserted anti-fraud and anti-manipulation authority over voluntary carbon markets and created an Environmental Fraud Task Force to investigate carbon credit fraud, including misleading claims about the environmental benefits of purchased offsets. The agency’s guidance directs exchanges listing carbon credit derivatives to evaluate the underlying credits for transparency, additionality, permanence, robust quantification, and prevention of double counting.9Federal Register. Commission Guidance Regarding the Listing of Voluntary Carbon Credit Derivative Contracts The CFTC has already brought fraud charges against at least one carbon credit project developer.
The Cross-Border Double-Counting Problem
Article 6 of the Paris Agreement addresses what happens when a carbon credit crosses national borders. The core safeguard is the “corresponding adjustment”: when one country transfers a credit to another, the selling country must add those emissions back to its own national inventory so the reduction isn’t counted twice.10UNFCCC. Article 6 of the Paris Agreement
This matters for voluntary buyers too. A company purchasing credits from a project in another country may not be getting a real offset if that country also counts the reduction toward its own national climate target. Without the adjustment, the same ton of reduction does double duty, and the atmosphere sees half the benefit both parties claim.
Price Is a Signal of Whether the Credit Is Real
The range of prices in the voluntary market is enormous, and price tracks quality closely. Nature-based credits generally run $7 to $24 per ton of CO₂ equivalent, with avoided-deforestation credits at the bottom around $5 to $6 per ton and reforestation credits in the $15 to $22 range. Technology-based removal credits cost far more: biochar averages around $177 per ton, and direct air capture can run $500 or higher.
That spread reflects a basic reality. A $5 forest conservation credit is cheap partly because permanence is uncertain, additionality is hard to prove, and baselines can be gamed. A $500 direct air capture credit costs more because the carbon is physically pulled from the air and stored underground, leaving less room for accounting ambiguity. Companies spending $5 per ton to call themselves “carbon neutral” are generally getting what they pay for, which is often not much. The market’s credibility problem is largely a price problem: the credits most likely to be real are the ones fewest buyers want to pay for.