INSIGHT

How private investment can fill the growing U.S. infrastructure funding gap

How promoting P3s, providing tax incentives and standardizing project assessment can meet industry challenges

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December 18, 2025

New insight papers from GIIA urge policy makers to promote P3s, provide tax incentives and standardize project assessment, all to enable private expertise meet public funding challenges. 

According to the American Society of Civil Engineers, the United States is facing an investment shortfall of over US$15 trillion between 2024 and 2043. This mounting fiscal pressure cannot be fulfilled by the public sector alone. Public policies must be introduced at federal, state and local levels, that unlock private capital and help to meet America’s critical infrastructure needs— from transportation and water systems, to broadband and clean energy.  

GIIA is advocating for solutions that will provide Americans with better infrastructure. We have produced a White Paper: Building a New Foundation for U.S. Infrastructure, and we are calling on Congress and U.S. policymakers to promote the use of both domestic and allied foreign private investment.  

Our policy and research team has put together seven key policy papers, outlining the most urgent challenges for infrastructure investment—and proposing timely solutions. In the first three papers, we propose steps that the U.S. government can take at municipal, state and federal levels to promote the viability of long-term projects, attract further capital into the market, and address the fragmentation of reporting schemes that currently delay infrastructure delivery. 

The first of these policy papers demonstrates the power of public-private partnerships (P3s) in unlocking private capital, expertise, and innovation; while, at the same time, enhancing project delivery, operational efficiency, and long-term asset performance.  

GIIA calls on U.S. policymakers to enable and promote P3s, especially by expanding existing federal programmes that: incentivise the model, provide case studies that exemplify the model to scale-up implementation of P3s, and establish an asset recycling program that fuels future P3s.  

GIIA also recognizes the necessity of cultivating a conducive environment for private investors; with the currently constrained budgets for federal, state and local government investment, attracting private capital has never been more important. The second of our papers focuses on targeted updates to federal tax incentives.  

Furthermore, successfully funded infrastructure projects face assessment through a fragmented reporting system that increases compliance costs, slows delivery and reduces transparency. In our third paper, GIIA outlines a standardized, comprehensive performance metric to measure and monitor infrastructure projects that streamlines the currently overlapping and conflicting standards at separate governance levels. 

As a collective, our seven papers will provide a range of detailed recommendations into how the U.S. can further promote and access private investment in infrastructure projects, and the value of working with private investors to meet the rising challenges of modernising America for the benefit of all its citizens. 

Look out for a further four papers to be published during January 2026. 

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