The Infrastructure Investment and Jobs Act expires on September 30, 2026. That is 140 days from today. Congressional committees have begun preliminary reauthorization work, but no bill has been introduced. For contractors, dealers, and equipment owners who built their pipelines around IIJA-level funding, this is not a wait-and-see window. It is a planning window.

According to the Federal Highway Administration, IIJA authorized roughly $1.2 trillion in total infrastructure spending and added $550 billion in new investment above pre-IIJA baselines. State DOTs have committed more than $261 billion in highway and bridge formula funds through February 28, 2026, supporting over 116,500 new projects. If Congress lets the law lapse without a reauthorization or a continuing resolution, formula programs revert to pre-IIJA baselines — dramatically lower than the funding levels the industry has been planning around for almost five years.

FieldFix Editor’s Note: Funding cliffs do not announce themselves on the jobsite. They show up as paused bid lettings, slower dealer financing decisions, and slipping start dates. FieldFix helps equipment owners watch the metrics that matter when the macro picture turns uncertain: hours, utilization, idle time, and cost per machine.

The cliff in plain English

There are two different deadlines worth keeping straight.

The first is September 30, 2026 — the end of federal fiscal year 2026 and the expiration of IIJA’s surface transportation authorization. After that date, the authorization mechanism that lets the Federal Highway Administration release formula funds to states stops working unless Congress acts. The Congressional Research Service has been clear that this affects highway, bridge, and transit formula programs — the largest categories of federal construction funding.

The second is the Highway Trust Fund itself. Federal fuel taxes have not been raised since 1993, and the Congressional Budget Office projects that under current policy the highway account will run short of cash by fiscal year 2028, with annual gaps approaching $40 billion. Independent analyses cited by industry groups suggest that simply holding spending near IIJA levels through FY27-31 would require around $150 billion in added resources — either through general fund transfers, new user revenues, or some mix.

Those two deadlines together explain why dealers and contractors are watching Washington more closely than usual. A short-term extension can keep the pipeline moving. A clean reauthorization at IIJA levels would calm the market. A full lapse with no extension would not. And the trust fund math means even a successful reauthorization will have to answer the harder question of how to pay for it.

What the cliff actually does to equipment demand

Federal money does not buy excavators. It buys projects. But it is hard to overstate how much federal formula funding shapes the work calendar for contractors who do highway, bridge, water, transit, broadband, and grant-funded site work.

When state DOTs build their multi-year project lists, those lists assume a certain federal apportionment. Lower apportionments mean fewer lettings. Fewer lettings mean fewer subcontracts. Fewer subcontracts mean less utilization on the equipment fleets that show up to do the work — pavers, milling machines, motor graders, articulated dump trucks, large excavators, soil compactors, and the support fleet behind them.

The other side of the story is private work. Power transmission, data centers, warehousing, and reshoring projects do not depend on a federal authorization. Those segments have absorbed a meaningful share of contractor capacity over the last two years. If the federal pipeline tightens, contractors with mixed books will rebalance toward private work. Contractors who specialize in DOT projects will feel it first and hardest.

For equipment owners, the practical question is not whether the cliff happens. The practical question is which side of that mix the fleet is positioned for.

What 140 days looks like for a contractor

For a contractor with significant federal exposure, the next four and a half months are not a time to make bold capital moves. They are a time to sharpen the books and shorten the planning horizon.

Three things are worth doing now.

The first is a backlog audit. Not a summary slide. A line-by-line review of which jobs are already under contract, which are awarded but unstarted, which are bid but undecided, and which are penciled into the forecast but still speculative. The contractor’s exposure to a federal funding pause is the sum of the speculative and bid columns, not the booked-and-funded ones. That number tells the equipment story.

The second is a utilization audit. Pull hours and idle time per machine for the trailing twelve months. Identify the bottom quartile. Those are the machines that will hurt most if revenue compresses. They are also the machines that will be hardest to sell into a soft used market if a downturn forces hand. Better to deal with them on the front end of the cycle than the back end.

The third is a financing audit. Long-term notes signed at IIJA-era confidence levels do not flex when the project pipeline does. Talk to dealers and finance partners now about restructuring options, lease conversions, or simple visibility into next-year payment schedules. Lenders are far more flexible in a planning conversation than in a default conversation.

The used market is already telling the story

The used equipment market in 2026 has not waited for the cliff to land. Sandhills data reported by trade publications shows used heavy-duty construction equipment inventory falling for the seventh straight month at the start of the year, with values drifting downward. Medium-duty inventory — skid steers, backhoes, mini excavators — fell roughly 16 percent year-over-year by April. Wheel loaders posted the sharpest contraction.

That data is doing two things at once.

It is telling contractors that quality used machines are harder to find, especially at the high end of the market. It is also telling dealers that the inventory mix is shifting into rental fleets rather than retail lots. Both effects are consistent with a market in which contractors are running existing iron longer rather than turning fleets, and rental houses are absorbing supply that used to flow to retail buyers.

If federal demand softens after September 30, that picture changes again. The fleets that look stretched today will rotate equipment back into the used channel faster than the channel can absorb it. That is the pattern that has shown up in every previous funding cliff. The contractors who got ahead of it sold into a tight market. The contractors who waited sold into a glutted one.

The lesson for fleet managers is not to panic-sell. It is to understand which machines are most exposed if the market softens, and to make a clear-eyed decision about each one now rather than in a forced timeframe later.

Dealers are watching this too

Dealers are not bystanders in this story. Their floorplan, their service department staffing, their parts inventory, and their financing relationships are all keyed off projected new and used unit sales. If formula funding lapses, dealers will adjust faster than most contractors expect — pulling stock orders, tightening inventory, and getting more selective on trades.

That has a practical implication for buyers. The dealers most worth talking to in the next four months are the ones with the steadiest mix of public, private, and rental customers. Single-segment dealers — especially those tied heavily to DOT work — will be the first to tighten. Multi-segment dealers will be slower to react and more willing to work with contractors on creative financing.

It also has an implication for sellers. Trade-in offers in a tightening market follow predictable behavior. The first hint of softness pulls auction prices down quickly. Dealer trade allowances follow with a lag, but they do follow. Contractors who hold equipment past the inflection point will see worse trade math than contractors who move earlier in the cycle.

Where Congress is, in plain language

There is no IIJA reauthorization bill on the floor today. The Senate Environment and Public Works Committee and the House Transportation and Infrastructure Committee have held hearings and released initial framework documents, but the formal legislative vehicle that will replace IIJA has not been introduced. That timeline is uncomfortably tight given how long surface transportation reauthorizations historically take to negotiate.

The most likely outcome — based on how every previous surface transportation cycle has played out — is some form of short-term extension that buys Congress more time. That extension may or may not include funding adjustments. It may or may not address the Highway Trust Fund solvency problem. The industry has lived through these short-term extensions before, and they create their own form of uncertainty even when the worst case is avoided.

Equipment owners should plan for the most likely outcome — a messy short-term extension — while staying prepared for the harder outcome of a real lapse. Both scenarios reward the same behaviors: tighter backlog visibility, leaner utilization, cleaner financing, and a willingness to make fleet decisions on a shorter horizon than the last few years required.

What contractors who lived through prior cycles will tell you

Surface transportation funding cliffs are not new. The industry navigated short-term extensions in 2014 and 2015 before the FAST Act. It navigated more extensions before IIJA. Each cycle produced winners and losers, and the differences usually came down to the same things.

The winners had backlog they could see in detail and financing they could flex. They had fleet utilization data clean enough to make sale or hold decisions quickly. They had relationships with dealers that survived contraction, not just expansion. They did not over-bet on any one funding stream — federal, state, private, or grant.

The losers did the opposite. They expanded fleet on the assumption that the last cycle would keep going. They financed aggressively on the assumption that revenue would be there. They were slow to read the market and slow to act. When the cliff hit, they sold into the worst end of the used market and carried debt service on machines they could not keep busy.

The cliff in 2026 will reward the same discipline. Visibility, flexibility, and a willingness to make hard decisions on a clear schedule are not glamorous traits, but they are the ones that show up on the other side of the cycle in better shape than they went in.

Bottom line

The IIJA cliff is real, the calendar is short, and the legislative vehicle to avoid it does not yet exist. That does not mean disaster, and it does not mean the industry should stop bidding work or running iron. It does mean equipment owners should be using the next 140 days to audit backlog, utilization, and financing — and to make fleet decisions on a tighter timeline than the last few years required.

The contractors and dealers who navigate the next cycle best will be the ones who treated May as a planning window rather than a waiting room. The cliff is on the calendar. The strategy decisions are on the desk.

Equipment Insider tracks the heavy equipment market, manufacturer announcements, and the macro factors shaping fleet decisions for contractors, dealers, and operators. This analysis draws on Federal Highway Administration, Congressional Research Service, Congressional Budget Office, and Sandhills market data publicly reported through May 2026.