Green steel looks expensive at the mill and cheap in the showroom

The green premium looks very different at the steel mill than at the showroom, and the gap between those two views matters for every company that buys steel inside a finished product.

What the modeling shows

Mission Possible Partnership modeled clean steel for a compact car in 2030 in its report Clean industry rising, published in June 2026. In that analysis, hydrogen-based steel made in Germany costs about 94% more than conventional steel. Because steel is only one input among many in a car, that premium adds only about 2.4% to the car's final cost.

The picture changes again when the iron is made elsewhere. With imported green iron, MPP finds the steel premium falls to about 49%, and the impact on the car's cost falls to about 1.2%. MPP describes the relationship between the material premium and the end-product premium as a dilution factor, which it puts at around 40.

Why buyers see a different number than producers

For a steelmaker, a premium of that size is a serious barrier, since it applies to the whole of its product. For a carmaker or machinery manufacturer, the same premium is spread across a much larger bill of materials and a much higher selling price. As a result, the cost that looks prohibitive at the mill can look modest at the point of sale.

That asymmetry is important because of where emissions sit in the inventory. For automotive and machinery buyers, steel can weigh heavily in purchased-goods emissions under Scope 3 while weighing lightly in product price. The buyer therefore has a strong reporting reason to care about cleaner steel and a comparatively small cost per unit when it does.

Turning the dilution into action

The dilution effect does not finance anything on its own. Someone still has to pay the producer's premium up front, and the buyer needs a reliable record of what that payment achieved.

This is where co-funding comes in. A buyer can co-fund verified low-emission steel in its own supply chain, with the resulting emissions reductions recorded once as inset credits. Credits are issued to the project developer after independent verification, and Carbon3 records them in its registry, so each reduction is claimed only once and its chain of custody stays clear. Spread across the units a buyer sells, that contribution can cost little per unit.

Insetting of this kind finances reductions inside the buyer's own value chain rather than compensating for emissions elsewhere, which is the core difference between insets and offsets.

Claim treatment depends on the applicable reporting framework.

Source: Mission Possible Partnership, Clean industry rising (June 2026).