IIJA and Infrastructure Spending: Peak Execution Phase

Introduction

The Infrastructure Investment and Jobs Act has allocated approximately $568 billion across 68,000+ projects nationwide as of late 2025. Of the $711.8 billion in potential IIJA funds identified across 15 agencies, $580.6 billion (82%) became available for obligation through fiscal year 2025, with agencies reporting $275.1 billion obligated (47% of available funds) and $119.4 billion outlayed (21%) as of December 31, 2024. The spending is heavily concentrated in highway and bridge projects, but extends to water systems, broadband, electric grid modernization, and public transit, creating demand across multiple industrials sub-sectors.

The IIJA is now in its peak execution phase: the projects have been awarded, the funding has been obligated, and the actual construction is underway. For industrials companies, this means the demand impact is no longer prospective; it is showing up in current order books and revenue. For bankers, the IIJA provides a structural demand narrative that supports sell-side positioning for any company with infrastructure exposure.

Heavy equipment and construction machinery. Every highway expansion, bridge replacement, and water system upgrade requires excavators, bulldozers, loaders, and other heavy equipment. Caterpillar and Deere benefit through both new equipment sales and the aftermarket parts and service demand from the expanded fleet working on infrastructure projects. The equipment demand is spread over 5-7 years as projects move from planning through execution and completion.

Construction materials and aggregates. Vulcan Materials, Martin Marietta, and CRH produce the aggregates (crushed stone, sand, gravel), cement, and asphalt that are the physical inputs for infrastructure construction. With local competitive moats from transportation economics (aggregates are too heavy to ship economically beyond 30-50 miles), the companies with quarries near IIJA project sites benefit disproportionately.

Engineering and construction (E&C) firms. Quanta Services (electric grid and infrastructure), AECOM (design and engineering), Jacobs Solutions (infrastructure consulting), and MasTec (specialty contracting) are direct beneficiaries of IIJA project flow. These companies convert IIJA funding into revenue through design, engineering, project management, and construction services contracts. Quanta Services has been a particular standout, benefiting from both IIJA infrastructure spending and the broader electrification and grid modernization megatrend.

Transportation infrastructure. The IIJA includes significant funding for highway expansion, bridge replacement, railroad crossing improvements, port and waterway modernization, and airport infrastructure. Class I railroads benefit from grade crossing improvements and intermodal facility investments.

The IIJA's funding timeline extends through fiscal year 2026, but the program faces political headwinds. Widespread federal funding cuts, freezes, and delays have threatened project implementation, with some award recipients reporting difficulty accessing obligated funds. The reauthorization debate (the law's surface transportation provisions expire in 2026) adds uncertainty about whether the current spending trajectory will continue beyond the initial five-year authorization period.

For industrials bankers, this political risk introduces nuance into the infrastructure demand narrative. The near-term demand (from projects already under construction with funding already obligated) is relatively secure. The medium-term demand (from projects in the pipeline that have been awarded but not yet fully funded) carries more uncertainty. And the long-term demand (post-2026, dependent on reauthorization) is speculative until Congress acts.