Insetting vs Offsetting Explained: Where the Reduction Happens and What You Must Prove

Companies that set out to cut emissions often choose between two routes that look similar in a sustainability report but work differently. Offsetting and insetting both fund reductions, but they differ on where those reductions happen and what the buyer has to prove. This article explains both terms, where they overlap and how to tell which one a project actually is.

Offsetting means compensating for emissions by funding projects that reduce or remove emissions elsewhere. The projects sit outside the company's own operations. Typical examples include reforestation, cookstove programmes, methane capture and blue carbon. The company buys credits, usually one per tonne of carbon dioxide or equivalent, and retires them on a registry to back its claim.

Insetting means reducing emissions within your own value chain. Instead of buying external credits, the company invests in practices at the core of its business, such as regenerative farming on the farms it sources from, or working with suppliers to cut their footprint. The reductions happen inside the supply chain the company already depends on.

The accounting difference. Offsets mainly address Scope 1 and 2 emissions, along with any residual Scope 3 emissions that cannot yet be eliminated. Insets focus on Scope 3 directly, which for many companies is the largest part of their footprint. An inset often produces no tradable credit, so its impact has to be measured and reported in another way.

Traceability. Insetting depends on showing that the reduction is linked to the company's own value chain. That requires supply chain visibility, reliable data and a clear chain of attribution and causality. Offsetting does not require the buyer to prove a link to its own sourcing, but it does require the project to show that its reductions are additional, durable and independently verified. Good offsetting and good insetting both rely on careful accounting, realistic baselines and transparent reporting, even though the tests are not identical.

Why the distinction matters for claims. A company that says it has reduced emissions in its supply chain should be able to show the reductions happened in that supply chain. A company that says it has offset emissions should be able to show the credits are real, retired and not counted twice. Mixing the two can make a claim look stronger than the evidence supports, so readers should check which mechanism sits behind the wording.

Speed and effort. Offsetting is usually faster to start, because a company can buy credits from an existing project. Insetting typically takes more planning, more collaboration with suppliers and more time before results appear. For companies whose emissions are concentrated in purchased goods, farming or transport, insetting can target the source of the problem. For companies with emissions they cannot yet remove, offsetting may be the only near-term option, provided it is not presented as a substitute for reducing emissions.

Where the frameworks overlap. Gold Standard has published guidance on value chain interventions, and organisations such as the International Platform for Insetting publish frameworks for insetting. Verra and others also set rules that affect how a project is classified. The existence of a framework does not make a particular project credible. The useful question is what the project measures, how it is verified and whether the buyer can explain the link to its own emissions.

How to tell which one you are looking at. Ask where the project is located relative to your operations, whether it generates a tradable credit, and how the reduction is traced back to your activities. If the project is in another region, unconnected to your sourcing, and produces a credit, it is an offset. If the project sits on farms or sites in your supply chain and the reduction is measured against your own purchases, it is an inset. Some projects combine both, and the report should say so.

The bottom line. Offsetting and insetting are two ways to fund emissions reductions, and each has a role. The difference lies in where the reduction happens and in what the buyer must prove. Read the wording of any claim against that difference, and keep the evidence for whichever route you choose.

Frequently asked questions.

Is insetting the same as offsetting? No. Offsetting funds projects outside a company's operations and value chain. Insetting reduces emissions within the value chain, and it often does not produce a tradable credit.

Can a company do both? Yes. Many companies reduce emissions in their supply chain and also buy offsets for residual emissions. The two should be reported separately so readers can see which reductions came from which route.

Does insetting always lower reported Scope 3 emissions? Not automatically. The reduction counts only if it is traceable, measured against a realistic baseline and not already counted elsewhere, such as by a supplier.

Does an offset have to be linked to a company's supply chain? No. Offsets are generally located outside the company's operations, and the buyer does not need to prove a link to its sourcing. It does need to show that the credit is real and has been retired.