The Obligated-Disbursed Gap: Permitting, Not Concrete, Is America's Infrastructure Bottleneck

The key IIJA statistic is not how much money was allocated, but how little has been converted into finished projects.

GAO’s July 2026 review found that of $574.7 billion in IIJA budget authority across DOT, EPA, Interior, and NTIA, roughly 76% had been obligated, but only 54% of obligated funds had been disbursed. The 22-point gap is the clearest measure of America’s infrastructure bottleneck.

The constraint is not capital. It is institutional throughput.

Formula Funding Solved Capital Allocation

IIJA largely distributes money through formulas tied to factors such as population and lane miles. Highway funding and State Revolving Fund grants are designed to move capital automatically rather than through competitive selection.

The result:

• Capital is largely pre-allocated once appropriated.
• Funds reach states and agencies as intended.
• Allocation friction is reduced.

What formula funding does not solve is project execution.

Why Obligated Funds Stall

Three constraints dominate.

1. Administrative and Political Friction

Beginning in 2025, agencies reviewed awards against new policy priorities.

GAO reported:

• 9,500 awards approved (~$128B)
• 2,500+ awards (~$33.6B) still awaiting decisions

Formula funding reduces competitive risk. It does not eliminate political risk.

2. Delivery Workforce Constraints

State DOTs and municipal agencies must design, permit, approve, and contract projects.

Many face:

• Flat headcount despite larger capital budgets
• Aging engineering workforces
• Slow public-sector hiring
• Competition from higher-paying private employers

The result is growing dependence on engineering consultants.

3. Environmental Review Timelines

Historically:

Even after streamlining, environmental review remains a multi-year gate for large projects.

The bottleneck sits between appropriation and construction: design, review, and permitting.

Where the Economic Rent Accrues

The market is increasingly rewarding firms that help capital move through the approval pipeline.

Two signals stand out:

1. AECOM’s persistent book-to-burn above 1.0x indicates demand arriving faster than projects can be worked through.
2. Tetra Tech’s margin growth exceeding revenue growth suggests pricing power rather than simple volume growth.

Private capital is reinforcing the message.

The clearest example was WSP’s acquisition of TRC at roughly 15.9x EV/EBITDA.

Sponsors are paying for design, permitting, compliance, and project-delivery capacity, not concrete-pouring capacity.

The Deregulation Risk

This rent is not guaranteed.

The administration has actively targeted NEPA-related bottlenecks:

• CEQ rescinded government-wide NEPA regulations.
• Agencies are rewriting procedures.
• Review timelines are being compressed.
• Categorical exclusions are expanding.
• Some agencies now allow expedited reviews funded by project sponsors.

This creates two opposing forces.

Even if compliance burdens fall, design and workforce constraints remain. Labor shortages cannot be removed by rewriting regulations.

The Political Clock

The thesis also depends on continued funding.

Recent legislation has already rescinded portions of unobligated infrastructure-related balances, demonstrating that funds remaining in the pipeline are vulnerable.

The larger issue is timing:

• IIJA expires September 30, 2026.
• Congressional signals point toward short-term extensions rather than a full reauthorization.
• Some specialized programs face uncertainty if not explicitly renewed.

This matters because throughput rents are time-sensitive.

Capital that gets obligated, permitted, and disbursed before funding changes becomes durable.

Capital stuck in the queue may not.

The Core Thesis

The data supports a simple conclusion:

America’s binding infrastructure constraint is institutional throughput, not construction capacity.

Evidence includes:

• A persistent 22-point obligation-disbursement gap.
• Record backlogs at engineering and consulting firms.
• Expanding margins for design and compliance providers.
• Rising AEC acquisition multiples.
• Public-sector staffing that has failed to keep pace with capital budgets.

However, this is a perishable rent.

The durable edge is not “permitting bureaucracy lasts forever.”

The edge is the ability to move capital through design, permitting, and approval pipelines before political or regulatory conditions change.

Indicators to Watch

The market has largely priced the existence of infrastructure spending. It is increasingly pricing the entities that can convert appropriated dollars into approved, executable projects.