Circular Economy Models
Executive Summary
Key Takeaways
- ✓ Circular economy investments generate financial returns and climate benefit through material recovery and recycling economics or product-as-a-service revenue structures, mechanisms distinct from both standard industrial investment and pure emissions-reduction projects.
- ✓ Material recovery and recycling economics depend on recovered material quality and the price of the virgin material it displaces, and a model should track these as explicit, separate drivers rather than a single blended recycling revenue assumption.
- ✓ Product-as-a-service business models, retaining ownership of a product and selling its use rather than the product itself, shift revenue recognition to a recurring, usage-based structure and create an explicit incentive for durability and end-of-life recovery that a standard sale-based revenue model does not capture.
- ✓ The avoided-virgin-material climate benefit should be calculated against a defined virgin material production emissions factor, since the climate benefit of material recovery depends on the emissions intensity of the virgin material actually displaced, which varies materially by material type.
- ✓ Circular economy investments frequently face a chicken-and-egg market development challenge, recovered material supply and demand for recycled input both need to reach sufficient scale, and this should be modelled as an explicit market development risk rather than assumed to resolve automatically.
Objective¶
This guide covers modelling circular economy investments within Climate Finance & Climate Financial Modelling.
Material Recovery and Recycling Economics¶
Material recovery and recycling economics depend on recovered material quality and the price of the virgin material it displaces. A model should track these as explicit, separate drivers, since recovered material of lower quality may only displace a fraction of virgin material demand or command a lower price, rather than a single blended recycling revenue assumption.
Product-as-a-Service Revenue Structures¶
Product-as-a-service business models, retaining ownership of a product and selling its use rather than the product itself, shift revenue recognition to a recurring, usage-based structure and create an explicit incentive for durability and end-of-life recovery, since the provider bears replacement and disposal cost rather than transferring it to a buyer at point of sale.
Avoided-Virgin-Material Climate Benefit¶
The avoided-virgin-material climate benefit should be calculated against a defined virgin material production emissions factor specific to the material type, since the climate benefit of material recovery depends on the emissions intensity of the virgin material actually displaced, which varies materially by material type, consistent with the counterfactual-based avoided emissions discipline in Emissions Reduction Models.
The Market Development Challenge¶
Circular economy investments frequently face a chicken-and-egg market development challenge: recovered material supply and demand for recycled input both need to reach sufficient scale for either to be commercially viable independently. This interdependency should be modelled as an explicit market development risk rather than assumed to resolve automatically as the market matures.
Common Construction Pitfalls¶
Recycling revenue modelled as a single blended assumption. Fails to distinguish recovered material quality tiers and the different virgin material prices each tier actually displaces.
Product-as-a-service revenue modelled as a point-of-sale transaction. Misrepresents the recurring, usage-based revenue recognition and durability incentive the structure actually creates.
Avoided-virgin-material benefit calculated without a material-specific emissions factor. Overstates or understates climate benefit depending on the actual emissions intensity of the material displaced.
Market development interdependency assumed to resolve automatically. Understates a genuine chicken-and-egg risk between recovered supply and recycled demand scale.
Recommended Practices¶
- Track recovered material quality and displaced virgin material price as explicit, separate drivers.
- Model product-as-a-service revenue as a recurring, usage-based structure.
- Calculate avoided-virgin-material benefit against a material-specific emissions factor.
- Model market development interdependency as an explicit risk, not an assumed automatic resolution.
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Related Pillars¶
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Frequently Asked Questions
How do circular economy investments generate financial returns and climate benefit?
Through material recovery and recycling economics, or product-as-a-service revenue structures, mechanisms distinct from both standard industrial investment, which typically sells a product once, and pure emissions-reduction projects, which typically generate a carbon credit or avoided-emissions revenue stream directly.
What drives material recovery and recycling economics?
Recovered material quality and the price of the virgin material it displaces, and a model should track these as explicit, separate drivers, since recovered material of lower quality may only displace a fraction of virgin material demand or command a lower price, rather than a single blended recycling revenue assumption that does not distinguish quality tiers.
What is a product-as-a-service business model?
A structure in which the provider retains ownership of a product and sells its use rather than the product itself, shifting revenue recognition to a recurring, usage-based structure and creating an explicit incentive for durability and end-of-life recovery, since the provider bears the cost of replacement and disposal rather than transferring that cost to a buyer at point of sale.
How should the avoided-virgin-material climate benefit be calculated?
Against a defined virgin material production emissions factor specific to the material type, since the climate benefit of material recovery depends on the emissions intensity of the virgin material actually displaced, which varies materially, aluminium recycling avoiding substantially more emissions per tonne than many other material types, for example.
What is the chicken-and-egg market development challenge in circular economy investment?
Recovered material supply and demand for recycled input both need to reach sufficient scale for either to be commercially viable independently, recovery infrastructure needs reliable demand to justify investment, while demand for recycled input needs reliable, quality-consistent supply, and this interdependency should be modelled as an explicit market development risk rather than assumed to resolve automatically as the market matures.
References
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