One trade route, several shippers, one fuel premium, shared and verified

One trade route, several shippers, one fuel premium: shared between them, verified independently and allocated in proportion to what each one paid. That is the shape of a route-level insetting program, and this illustrative example shows how the roles fit together. It is not a specific route, client or agreement.

The problem it addresses

A lower-emission marine fuel usually costs more than the conventional fuel it replaces. On a container route, the vessel carries goods for many cargo owners, and none of them can have a specific batch of fuel routed to their own boxes. A single shipper rarely has the volume to fund a fuel switch alone, and the carrier has little reason to absorb the premium without someone sharing it.

Pooling the premium across the shippers on one route is one way through.

Four roles on one route

In the example, four parties each have a defined job.

• Program host. A port authority or corridor operator registers the route program and sets the participation rules.
• Carrier. The shipping line operating the route uses the lower-emission fuel and supplies the voyage and fuel data.
• Cargo owners. Several shippers on the route co-fund the fuel premium and receive credits in proportion to their contribution.
• Carbon3. As registry and market, Carbon3 records the voyage-level credits once they are issued, tracks their allocation and records their retirement.

From voyage to credit

The sequence matters. The carrier runs voyages on the route using the lower-emission fuel and reports the data. The reduction on those voyages is then checked by an independent verifier. Only after that verification are voyage-level inset credits issued.

The credits are then allocated to the cargo owners according to the share of the premium each one funded. Carbon3 records each credit with a serial number, so every verified reduction is counted once and can be retired once.

Funding that stays in the value chain

Unlike offsetting, where a company buys credits from projects outside its own operations, this funding stays inside the shipping value chain the cargo owners already use. Their freight moves on the route, and the reduction happens on the same route.

The credits also sit apart from compliance. Inset credits are not EU ETS allowances or FuelEU Maritime compliance units, and the carrier's own obligations under those schemes are calculated under their own rules. Claim treatment depends on the applicable reporting framework.

For cargo owners, the practical point is that a fuel switch no single shipper could fund alone can become a shared program, with a verified, serialized record of each participant's share.

Source: Carbon3. Illustrative example; not a specific route, client or agreement.