Climate Finance Overview
Executive Summary
Key Takeaways
- ✓ Climate finance capital sources span a concessionality spectrum from fully concessional grant funding through concessional and blended debt to fully commercial private capital, and a climate investment model should identify which point on that spectrum each capital source in the structure actually occupies.
- ✓ Multilateral development banks and dedicated climate funds typically provide the most concessional capital, used to absorb first-loss risk or extend tenor beyond what commercial capital alone would accept.
- ✓ Development finance institutions occupy an intermediate position, often providing near-commercial terms with additional risk mitigation instruments (guarantees, political risk insurance) rather than pure concessionality.
- ✓ Sovereign wealth funds and private capital typically enter at or near commercial terms, and their willingness to participate is frequently the signal that a climate investment has moved from requiring concessional support to being commercially investable on its own merits.
- ✓ The specific instrument used, grant, concessional loan, guarantee, equity, or results-based payment, determines how a capital source's contribution should be represented in the model, not merely which institution provided it.
Objective¶
This guide maps the climate finance capital landscape within Climate Finance & Climate Financial Modelling, as the foundation for the more specific modelling guides that follow it.
Capital Sources Across the Concessionality Spectrum¶
Multilateral development banks and dedicated climate funds typically provide the most concessional capital available in a climate finance structure, used to absorb first-loss risk, extend tenor beyond what commercial capital alone would accept, or fund activity with a public-good climate outcome that does not by itself generate a commercially attractive return.
Development finance institutions occupy an intermediate position, frequently providing capital at or near commercial terms but paired with additional risk mitigation instruments, guarantees, political risk insurance, or technical assistance, rather than pure interest rate or tenor concessionality.
Sovereign wealth funds and private capital typically enter at or near fully commercial terms. Their participation is frequently read as a signal that an investment has moved from requiring concessional support to being commercially investable on its own underlying economics.
Instruments Connecting Capital to Climate Outcomes¶
The specific instrument, grant funding, a concessional loan, a guarantee, an equity stake, or a results-based payment tied to a verified climate outcome, determines how that capital source's contribution should be represented in a financial model. A grant reduces effective capital cost to zero for its portion of the structure; a guarantee does not itself provide cash but changes the risk profile, and therefore the pricing, of the commercial capital it supports; a results-based payment is contingent on a future verified outcome and should be modelled as a conditional cash flow rather than a certain one.
Reading the Capital Stack¶
A climate finance structure frequently layers several of these sources and instruments together, a concessional first-loss tranche from a climate fund, a guarantee-supported senior tranche from a development finance institution, and a commercial equity tranche from private capital. Understanding where each source sits in this stack, and on what terms, is the prerequisite for building the climate investment model that represents the structure's blended cost of capital and return waterfall correctly. See Blended Finance for the structured practice of combining concessional and commercial capital toward this end.
Common Construction Pitfalls¶
Capital sources treated as interchangeable by institution type. Assuming all capital from a given institution carries the same terms overlooks that individual instruments within a structure can vary materially even from the same source.
Concessionality left implicit. Failing to state explicitly which capital sources are concessional, and by how much relative to a commercial benchmark, obscures how dependent the overall structure is on non-commercial support.
Guarantees modelled as cash. Treating a guarantee as if it were a direct cash contribution, rather than a risk mitigation instrument that changes the pricing of other capital in the structure, misstates the capital stack.
Recommended Practices¶
- Identify explicitly where each capital source sits on the concessionality spectrum, relative to a stated commercial benchmark.
- Model each instrument, grant, loan, guarantee, equity, results-based payment, according to its own specific cash flow and risk mechanics.
- Track private and commercial capital participation as an explicit signal of an investment's standalone commercial viability.
Continue Reading¶
Related Pillars¶
Related Technical Guides¶
Related Glossary¶
How OXXON tests thisRun a free structural check with FMAE
Frequently Asked Questions
What are the main capital sources in climate finance?
Multilateral development banks, dedicated climate funds, development finance institutions, sovereign wealth funds, and private capital, each typically entering an investment at a different point on the concessionality spectrum from fully concessional to fully commercial.
What does concessionality mean in a climate finance context?
The degree to which a capital source's terms (interest rate, tenor, risk absorption) are more favourable than what the market would otherwise offer, provided specifically to make an investment with a genuine climate outcome viable where fully commercial capital alone would not finance it.
How do development finance institutions differ from multilateral development banks in this landscape?
Development finance institutions typically provide capital closer to commercial terms, often paired with risk mitigation instruments such as guarantees or political risk insurance, while multilateral development banks and dedicated climate funds more often provide the most concessional capital in a structure, such as first-loss tranches or extended tenor.
Why does private capital participation matter as a signal?
Because sovereign wealth funds and private capital typically enter at or near commercial terms, their willingness to participate in a climate investment is frequently read as a signal that the investment has become commercially investable on its own merits, rather than continuing to depend on concessional support.
Why does the specific financial instrument matter, not just which institution provided the capital?
Because a grant, a concessional loan, a guarantee, an equity stake, and a results-based payment each have a fundamentally different effect on the capital structure, cash flow timing, and risk allocation, and a model should represent the instrument's actual mechanics rather than treating all capital from a given institution type as interchangeable.
References
Related Articles
Climate Finance & Climate Financial Modelling
Climate finance is the mobilisation and allocation of capital toward mitigation, adaptation, and transition activity, and climate financial modelling is the discipline of representing that activity's cash flows, risk, and concessionality in a financial model. This page is the hub for the Knowledge Centre's climate finance content: how sustainable, green, and transition finance are distinct but related capital allocation frames, how a climate investment model differs from a standard project or corporate model in its treatment of concessional capital and additionality, how physical and transition climate risk are quantified at portfolio and entity level, and how carbon markets, climate-sector investment, and institutional governance practice build on these foundations as this domain expands.
Climate Financial Modelling
Climate financial modelling is not a separate mathematical discipline from standard corporate or project financial modelling, but it requires explicit representation of drivers a generic template does not carry by default: concessional and catalytic capital layering, additionality assessment, carbon-adjusted cash flows, and measurement, reporting, and verification (MRV) of the climate outcome itself. This guide sets out each of these structural differences and how they should be built into a climate-specific financial model.
Blended Finance
Blended finance is the structured use of concessional capital, most commonly from a development finance institution, multilateral development bank, or dedicated climate fund, to mobilise additional commercial capital toward a climate or development outcome that commercial capital alone would not finance. The concessional layer typically absorbs first-loss risk or provides a guarantee, changing the risk profile of the commercial capital sitting alongside it.
Climate Investment Models
A climate investment model represents a capital structure that frequently blends concessional, catalytic, and commercial capital toward a climate outcome, and requires an explicit return waterfall showing how each layer's terms interact rather than a single blended internal rate of return. This guide covers how to model concessional and catalytic capital layering, additionality-conditioned eligibility for specific capital tranches, and the return waterfall a blended structure actually produces for each participant.