Development Finance Institution Models
Executive Summary
Key Takeaways
- ✓ A development finance institution pursues development impact alongside, and sometimes in place of, pure commercial return, and its model should represent both dimensions rather than only the financial return.
- ✓ Blended finance structures — combining DFI capital with commercial capital at different positions in the capital stack, often with DFI capital taking a subordinated or lower-return position — should be modelled explicitly, showing how the blend changes the effective return profile for each capital provider.
- ✓ Concessionality (financing provided on better-than-market terms — a below-market rate, longer tenor, or more flexible repayment) should be quantified explicitly as its own line item, not left implicit in a below-market headline rate that obscures how much subsidy is actually being provided.
- ✓ Additionality — whether the DFI's involvement enabled a transaction that would not otherwise have reached financial close on commercial terms alone — is a qualitative and quantitative test a DFI investment should be assessed against, distinct from the transaction's financial return itself.
- ✓ Development impact metrics (jobs created, emissions avoided, access to services expanded) should be tracked alongside, not in place of, standard financial modelling discipline, since a DFI investment that fails financially does not achieve sustainable development impact either.
Objective¶
This guide covers how a development finance institution's financial model should represent concessional and blended finance, additionality, and development impact metrics, within the Banking Financial Modelling pillar, extending the general model structure to a mandate that pursues development objectives alongside commercial return.
Blended Finance Structures¶
Blended finance combines DFI capital with commercial capital at different positions in the capital stack — DFI capital often taking a subordinated, first-loss, or lower-return position specifically to improve the risk-return profile for commercial co-investors and mobilize private capital into a transaction it would not otherwise enter alone. A model should show the resulting effective return for each capital provider explicitly, not blend them into a single average transaction return that obscures how the risk and return are actually being allocated.
Quantifying Concessionality¶
Concessionality — financing provided on better-than-market terms, whether a below-market rate, a longer tenor, or more flexible repayment structure — should be quantified explicitly as its own line item: the present value gap between the concessional terms actually offered and an equivalent market-rate facility. Leaving this implicit in a below-market headline rate obscures the magnitude of subsidy being provided, a material fact for both governance oversight and public reporting purposes.
Concessionality (PV terms) = PV(Market-Rate Facility Cash Flows) − PV(Actual Concessional Facility Cash Flows)
The Additionality Test¶
Additionality tests whether the DFI's involvement enabled a transaction that would not otherwise have reached financial close on purely commercial terms alone. This is a distinct question from the transaction's financial return — a DFI investing in a transaction that would have proceeded anyway on commercial terms has not demonstrated additionality, regardless of how attractive the return achieved. A model or investment memo should address this question explicitly rather than treating a positive financial return as sufficient justification on its own.
Development Impact Metrics Alongside Financial Discipline¶
Development impact metrics — jobs created, emissions avoided, access to services expanded, and similar measures relevant to the specific mandate — should be tracked alongside, not in place of, standard financial modelling discipline. A DFI investment that fails financially does not achieve sustainable development impact either, since the underlying project or institution being financed typically cannot deliver on its development objectives if it is not also financially viable.
Common Construction Pitfalls¶
- Blending commercial and concessional capital returns into a single average figure rather than showing the effective return to each capital provider separately.
- Leaving concessionality implicit in a below-market rate rather than quantifying the present value subsidy explicitly.
- Treating a positive financial return as sufficient evidence of additionality without a distinct additionality assessment.
- Presenting development impact projections as a substitute for, rather than a complement to, rigorous financial modelling discipline.
Continue Reading¶
Prerequisites¶
- Banking Financial Modelling — the parent pillar
Related Technical Guides¶
Related Pillars¶
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Frequently Asked Questions
What distinguishes a development finance institution's model from a standard bank model?
A DFI model must represent development impact alongside, and sometimes in place of, pure commercial return — incorporating concessionality, blended finance structuring, and development impact metrics that a standard commercial bank model has no equivalent for.
What is blended finance, and how should it be modelled?
A structure combining DFI capital with commercial capital at different positions in the capital stack — often with DFI capital taking a subordinated or lower-return position to improve the risk-return profile for commercial co-investors — modelled explicitly to show the resulting effective return for each capital provider, not blended into a single average return figure.
What is concessionality, and why should it be quantified explicitly?
Financing provided on better-than-market terms — a below-market interest rate, longer tenor, or more flexible repayment structure — and it should be quantified explicitly (the present value gap between the concessional terms and an equivalent market-rate facility) rather than left implicit in a headline rate, since the magnitude of subsidy being provided is a material fact for governance and reporting purposes.
What is additionality?
The test of whether a DFI's involvement enabled a transaction that would not otherwise have reached financial close on purely commercial terms — a qualitative and quantitative assessment distinct from the transaction's financial return, since a DFI investing in a transaction that would have proceeded anyway on commercial terms alone has not demonstrated additionality regardless of the return achieved.
Should development impact metrics replace financial modelling discipline?
No — they should be tracked alongside standard financial modelling discipline, not in place of it, since a DFI investment that fails financially does not achieve sustainable development impact either, regardless of how favourable its projected impact metrics appeared at appraisal.
How does this guide relate to Export Credit Agency Models and Infrastructure Bank Models?
All three cover institution types pursuing policy or developmental objectives alongside commercial return, sharing the concessionality and additionality concepts covered here, applied to different specific mandates.
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