Last updated: 14 April 2026
Short answer: carbon markets allow emissions allowances or carbon credits to be bought, sold, or retired. Compliance markets are created by regulation, while voluntary markets are used by companies that choose to finance emissions reduction or removal projects. For most businesses, carbon markets should come after measuring and reducing emissions, not before.
Carbon markets can be useful, but they are often misunderstood. A carbon credit is not the same as reducing emissions inside the company. A credit can support a project outside the company's boundary, but the company still needs to understand its own emissions, reduction options, claim wording, and evidence.
For buyers, customers, and stakeholders, the key question is not simply whether a company bought credits. It is whether the company has a credible emissions baseline, a reduction plan, and careful language about what the credits do and do not prove.
What are carbon markets?
Carbon markets create a way to price or finance greenhouse gas emissions reductions or removals. There are two broad categories:
- Compliance carbon markets: markets created by laws or regulations where covered entities may need allowances or credits to meet obligations.
- Voluntary carbon markets: markets where organizations buy and retire carbon credits voluntarily, often to support climate goals or claims.
The details vary by market, geography, project type, and claim. That is why companies should avoid treating carbon credits as a generic sustainability shortcut.
Carbon credits are not the same as internal reductions
Internal emissions reductions come from changes in the company's own operations or value chain: energy efficiency, renewable electricity, fuel reduction, logistics changes, product redesign, supplier engagement, waste reduction, or lower-emission materials.
Carbon credits usually relate to projects outside the company's direct boundary. They may represent emissions reductions, avoided emissions, or removals depending on the project and methodology.
Both can have a role, but they should not be confused. A credible climate approach usually starts with GHG emissions calculations, then reduction planning, then careful consideration of credits for residual emissions or specific voluntary claims.
Quality matters
Not all carbon credits carry the same quality or risk. Companies should perform due diligence before purchasing or communicating about credits.
Common quality questions include:
- Is the project registered under a credible standard or registry?
- Has the project been independently validated or verified under the relevant program?
- Is the emissions reduction or removal additional to what would likely have happened anyway?
- How is permanence addressed, especially for nature-based or removal projects?
- Is there a risk of leakage, where emissions shift elsewhere?
- How is double counting avoided?
- What is the credit vintage and project location?
- What claim is the company allowed to make after retiring the credit?
The answers should be documented before the company uses credits in reports, tenders, or marketing.
Be careful with “carbon neutral” claims
Claims linked to carbon credits can create reputational and compliance risk if they are vague or overstated. Terms such as “carbon neutral,” “net zero,” “climate positive,” or “offset” need careful review.
A stronger approach is to be specific:
- What emissions boundary was calculated?
- Which emissions were reduced internally?
- Which emissions were addressed through credits?
- What type of credits were retired?
- Which registry, vintage, and project type were used?
- What limitations or exclusions apply?
Keslio's reporting and communications support can help companies present carbon-market activity clearly without overstating what credits prove.
Carbon credits are different from green certificates
Carbon credits and renewable electricity certificates are often confused. They are different instruments used for different purposes.
A carbon credit is linked to an emissions reduction or removal project. A renewable electricity certificate or similar instrument is linked to the generation and attribute of renewable electricity. Companies should understand which instrument they are using and what claim it supports.
This distinction matters for emissions calculations, customer responses, and public sustainability claims.
When carbon markets may be relevant for a business
Carbon markets may become relevant when a business:
- Has calculated its emissions and identified residual emissions it cannot yet reduce
- Receives a customer request about offsets, credits, or climate claims
- Needs to understand whether a supplier's carbon claim is credible
- Is considering a voluntary climate contribution
- Operates in a jurisdiction or sector with compliance-market exposure
- Wants to communicate climate action and needs claim review
In each case, the first step is to clarify the requirement, boundary, and intended claim.
Do not use credits to avoid reduction work
Carbon credits can finance useful projects, but they should not replace operational action. Customers and investors are increasingly interested in whether a company is reducing its own emissions, improving data, engaging suppliers, and tracking progress.
A company that buys credits without understanding its emissions baseline may struggle to answer basic questions. What was offset? Which Scope 1, Scope 2, or Scope 3 emissions were included? What reduction actions are underway? What evidence supports the claim?
How Keslio can help
Keslio does not need to act as a carbon-credit broker to help companies make better decisions. Support can include:
- Calculating Scope 1, Scope 2, and relevant Scope 3 emissions
- Helping identify where reductions should be prioritized before credits
- Reviewing customer questions about carbon credits, offsets, or climate claims
- Preparing evidence and methodology notes for carbon-related communication
- Helping teams distinguish carbon credits from renewable electricity instruments
- Reviewing report and website language for clarity and claim risk
For customer-driven questions, Keslio's supplier request support can help interpret the exact wording before the company responds.
Bottom line
Carbon markets are not a replacement for emissions management. They are a tool that may be relevant after a company understands its own footprint, reduction options, and claim boundaries. Measure first, reduce where practical, document carefully, and be precise about what carbon credits can and cannot prove.
