Allocatability, not Bankability, may be the Primary Constraint on Infrastructure Capital at Scale

Analysis released ahead of the G7 Summit and London Climate Action Week argues that infrastructure capital formation is increasingly constrained by allocatability rather than capital availability.

LONDON — Despite three decades of guarantees, blended finance structures, political risk insurance and first-loss capital mechanisms, the global infrastructure financing gap remains substantial.

This persists even as more than US$300 trillion is already allocated across institutional portfolios worldwide.

A new analysis released today by the Sustainable Markets Initiative (SMI), Africa investor (Ai), the Institute of Sovereign Investors (ISI) and partners suggests that the principal constraint on infrastructure capital formation may no longer be capital availability.

It may be allocatability.

Infrastructure may be bankable without being allocatable.

The infrastructure challenge is no longer simply how to finance infrastructure.

It is how to create allocatable exposure.

The infrastructure constraint is increasingly fiscal rather than financial.

Governments face infrastructure requirements that exceed what public balance sheets can fund and what MDB-led de-risking mechanisms can mobilise at scale.

Governments scale infrastructure through balance sheets.

Institutional investors scale infrastructure through allocations.

As fiscal capacity becomes increasingly constrained, infrastructure capital formation may depend less on additional risk-transfer mechanisms and more on whether infrastructure exposure can satisfy institutional allocation requirements at scale.

Bankability determines whether projects obtain financing.

Allocatability determines whether exposure can enter the portfolio, benchmark and governance systems through which institutional capital is allocated.

These conditions are not equivalent.

Projects may satisfy lender requirements, attract financing and achieve commercial viability while remaining absent from institutional portfolios.

Institutional capital does not allocate to projects.

It allocates to admissible exposure.

Allocatability Risk-Bounding (ARB) addresses the conditions through which infrastructure exposure becomes institutionally allocatable.

The analysis is being released as leaders, sovereigns, investors and policymakers gather for the G7 Summit and London Climate Action Week to identify practical mechanisms capable of accelerating private capital mobilisation for resilient infrastructure systems.

Its central proposition is straightforward:

• Bankability determines participation.
• Allocatability determines scale.
• Scale determines the cost of capital.

“For decades, infrastructure finance has focused on reducing risk in order to attract capital. Yet the financing gap persists despite significant innovation in guarantees, blended finance and risk-transfer mechanisms.The challenge is not capital availability. The constraint is institutional allocatability. Governments scale infrastructure through balance sheets. Institutional investors scale infrastructure through allocations. As fiscal capacity becomes increasingly constrained, the question is no longer simply how to finance infrastructure. The question is whether infrastructure exposure can become allocatable. Institutional portfolios do not primarily allocate to projects. They allocate to admissible exposure. The challenge is no longer how to remove more risk. It is how to create allocatable exposure.” Dr Hubert Danso, Chairman and Chief Executive Officer of Africa investor Group.

“The world’s largest pools of capital allocate through mandates, benchmarks, governance frameworks and portfolio construction disciplines. A project may satisfy lender requirements and still remain absent from institutional portfolios. Infrastructure may be bankable without being allocatable. Allocatability provides a useful lens through which sovereigns, investors and policymakers can better understand the relationship between infrastructure development, institutional participation and long-term capital formation.”  Kristian Flyvholm, Chief Executive Officer of the Institute of Sovereign Investors (ISI)

Infrastructure capital may increasingly scale not because risk disappears, but because exposure becomes institutionally allocatable.

As fiscal capacity becomes increasingly constrained, understanding the distinction between bankability and allocatability may become increasingly important for sovereigns, investors and policymakers seeking to mobilise capital at institutional scale.

Read the ARB analysis here: Allocatability Risk-Bounding (ARB) Report 2026