Project Finance Market Summary
Multilateral Development Bank Gap Financing for Projects Market Overview
Multilateral Development Bank participation can materially improve bankability, but it rarely eliminates the need for additional capital. Sponsors still need to close the gap between total project cost and the combined capacity of sponsor equity plus senior debt.
Gap financing is the tranche that enables financial close. It is usually structured as mezzanine debt, preferred equity, or a tailored credit tranche that preserves senior lender protections while completing the capital stack.
Market Context and Public Data Points
Financing gaps persist because development and infrastructure investment needs exceed available resources. This dynamic drives the continuous focus on cofinancing, mobilisation, and private capital participation.
Global Infrastructure Needs
The G20 Global Infrastructure Hub estimates total infrastructure investment needs of roughly US$97 trillion by 2040, with a large unfunded portion if current trends continue, as summarised in its publication on the Global Infrastructure Outlook investment needs.
Financing Gap to 2030
The OECD’s Global Outlook on Financing for Sustainable Development projects a financing gap that could reach US$6.4 trillion by 2030 without major reforms, as stated in its Global Outlook 2025 publication page.
Why Multilateral Development Bank Participation Still Leaves Gaps
Even when a project is eligible for development finance, senior sizing remains constrained by coverage ratios, construction risk, jurisdictional risk, and sponsor support limits. Multilateral Development Banks can anchor governance and risk mitigation, but capital stack completion still requires a tranche aligned with private risk appetite.
A useful way to frame Multilateral Development Bank participation is that it improves bankability and risk allocation. Gap financing remains the tranche that must be privately solved to reach close.
Selected Institutional Scale (Recent Public Reporting)
The examples below are drawn from official public reporting and illustrate the scale of development finance and the role of mobilisation and cofinancing. They also explain why project sponsors still encounter unfunded portions.
World Bank Group
The World Bank Group reports US$118.5 billion in loans, grants, equity investments, and guarantees in fiscal 2025 on its Annual Report financial summary.
European Bank for Reconstruction and Development
The European Bank for Reconstruction and Development reports €16.6 billion invested in 2024 and €26.7 billion mobilised in its 2024 record year announcement.
African Development Bank Group
The African Development Bank provides a public overview that notes approvals in 2024 of UA 8.47 billion on its institutional overview page.
Sponsors also reference the corresponding details in the annual report PDF.
Asian Development Bank
The Asian Development Bank publishes operational datasets for its Annual Report 2024 via the ADB Data Library
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which supports sponsor and lender benchmarking when discussing commitments, cofinancing, and sector allocation.
Where the Financing Gap Typically Appears
Construction Phase Constraints
Construction risk drives conservative senior sizing. Completion support, contingency, and contractor strength determine whether senior proceeds increase or remain capped.
Coverage Ratios and Tenor Limits
DSCR requirements, reserve mechanics, and tenor caps reduce senior capacity relative to total project cost, especially where revenues ramp up over time.
Country Risk and Convertibility
Where hard currency revenue is limited or convertibility is uncertain, senior lenders often size down, expanding the required subordinate tranche.
Sponsor Support Boundaries
Sponsors may have committed meaningful equity but cannot increase equity further without breaching return hurdles, portfolio limits, or guarantee capacity.
Common Gap Financing Structures Used to Reach Financial Close
Gap financing is typically structured to protect senior lenders while providing a defined economics and governance profile acceptable to the gap capital provider.
Mezzanine Debt
Subordinated tranche behind senior debt, typically with defined cash flow waterfalls, tighter covenant packages, and intercreditor protections.
Preferred Equity
Equity-like capital with defined return mechanics and control rights, used where leverage constraints limit additional debt sizing.
Guarantee-Enhanced Senior Sizing
Where feasible, guarantees and risk mitigation can increase senior proceeds and reduce the size of the subordinate tranche required to close.
Structured Credit
Tailored tranche combining reserves, covenants, completion protections, and step-in mechanics aligned with the risk appetite of the capital provider.
Gap capital is underwritten like private credit. Sponsors should expect verification of contracts, enforceability, and downside protection rather than evaluation of concept narratives.
What Gap Capital Providers Underwrite
- Contract package:
offtake, concession, PPA, EPC, O&M, permits, land rights, and key approvals
- Model quality:
base and downside cases, sensitivities, covenant headroom, reserves, and draw schedule
- Risk allocation:
completion support, liquidated damages, insurances, and step-in rights where applicable
- Sponsor profile:
track record, governance, financial capacity, and execution capability
- Funds flow:
controlled accounts, waterfall mechanics, and intercreditor structure
Lender-Side Context
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Financely supports sponsors in structuring and placing gap financing tranches for projects approaching financial close. We focus on packaging, structuring, and targeted outreach based on underwriting standards and documented transaction mechanics.
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