Construction Costs Rise 11.9% in 2026: What Contractors Should Review Before Year-End
Construction costs in 2026 are putting renewed pressure on contractor profit margins. In its October 15 release, the Associated General Contractors of America (AGC) reported that the producer price index for inputs to new nonresidential construction rose 11.9% from September 2025 to September 2026—the largest annual increase in four years.
For contractors and real estate developers, the year-end priority is to translate that signal into updated project economics. A full backlog offers little protection if the remaining work is priced on yesterday’s assumptions.
Construction Costs in 2026: What the Latest Data Tells Us
AGC’s analysis of government data shows annual increases of 27.6% for steel mill products, 30.0% for copper and brass mill shapes, and 25.2% for aluminum mill shapes. Diesel fuel rose 115.2% at the refinery or terminal level; truck freight transportation increased 19.3%. AGC also reported longer lead times for key steel components.
These are national producer-price measures, not a forecast of an individual project’s total cost. The 11.9% figure does not mean every contractor’s costs rose by that amount, and the diesel index is not the same as the retail price paid at the pump. Actual exposure depends on procurement timing, contract terms, geography and the mix of work. Review the October 15 AGC release and the BLS explanation of producer price indexes for context.
1. Rebuild estimates to complete from the field up
Start with the remaining scope on each active job. Updating a budget by applying a broad inflation percentage can obscure the specific packages creating risk. Project managers, estimators, procurement and finance should agree on quantities, unit costs, production rates and the revised completion schedule.
Committed costs: Confirm purchase orders and subcontract commitments, including exclusions, freight, surcharges and escalation provisions. Identify commitments that remain subject to repricing.
Unbought work: Refresh supplier quotes and bid validity dates for material and subcontract packages that have not been locked in.
Time-related costs: Reassess supervision, equipment rentals, temporary facilities and general conditions when delivery or completion dates move.
Completeness: Capture incurred but unposted costs and outstanding commitments without counting them twice in the forecast.
Document what changed from the prior estimate, who approved the revision and what evidence supports it. An estimate to complete should be a current operating judgment, not the amount needed to preserve the original margin.
2. Make the WIP schedule explain margin movement
A reliable work-in-progress (WIP) review connects job-cost records with the latest estimate at completion, contract value, billings and expected collections. Reconcile the job-cost detail to the general ledger, then investigate margin changes job by job.
For contracts recognized over time using an appropriate cost-to-cost measure, a higher estimated total cost can change measured progress and revenue recognized to date. The accounting effect depends on the contract and applicable reporting framework; billing progress alone does not establish earned revenue. Finance should also evaluate potential loss contracts promptly under the applicable accounting requirements.
Consider a simplified planning example: a $5 million contract originally expected to cost $4 million carries $1 million of projected gross profit, or a 20% margin. If estimated total cost rises to $4.4 million and contract value remains unchanged, projected gross profit falls to $600,000, or 12%. That is a 40% reduction in expected gross profit. The example illustrates forecast economics; it is not a revenue-recognition calculation.
Explain underbillings and overbillings separately. An underbilled position may reflect normal timing, a billing constraint or disputed scope; it does not by itself establish collectibility. Overbillings may support current cash while leaving substantial future performance costs. Neither balance should substitute for a project cash forecast.
3. Evaluate backlog by expected margin and cash needs
Backlog should show more than contracted revenue. Review the unperformed work by expected gross profit, procurement exposure, start date, customer concentration and cash requirements. Separate signed backlog from bids, verbal awards and other pipeline opportunities.
For each significant contract, identify whether pricing is fixed, adjustable or reimbursable—and whether the actual terms allow recovery of the costs in question. Track the remaining cost exposure on fixed-price work, the availability of contingency and the date critical purchases must be committed.
A useful leadership report shows original bid margin, current expected margin and the reasons for movement. Rank projects by potential margin loss and peak cash need, not simply by contract size. Developers should connect these revisions to total development cost, financing availability and the timing of draws and completion.
4. Close the gap between change orders and recovery
Extra work can consume cash well before it produces a collectible receivable. Maintain a change-order log that distinguishes approved changes, pending requests, disputed amounts and work performed without settled pricing.
For each item, assign an owner, record contractual notice deadlines, preserve field documentation and track both direct costs and schedule effects. Price the full impact of changed work, including labor burden, equipment, supervision and any supported delay costs. Evaluate revenue recognition and collectibility separately from management’s expectation of recovery.
Escalation clauses and reimbursement provisions require a contract-specific review. Do not assume higher input prices automatically create a right to additional payment. Bring unresolved contract questions to legal counsel before relying on recovery in the base forecast.
5. Stress-test labor, fuel and productivity together
Material inflation is only one source of margin pressure. Revisit fully burdened labor rates, overtime, crew availability, subcontractor capacity and actual production against estimated hours. A stable hourly wage does not protect a job when output per crew-hour declines.
Build sensitivities around the remaining work. For example, model a 5% increase in uncommitted material costs, a 5% increase in remaining labor hours and a 10% increase in forecast fuel costs. These are illustrative stress assumptions, not predictions. Apply each change to the exposed cost base and avoid duplicating fuel already included in subcontract or freight pricing.
Show the effect on expected gross profit, monthly cash needs and financing headroom. Establish action triggers—such as a minimum projected job margin or a delivery delay beyond a defined date—and name the person responsible for responding.
6. Build 2027 forecasts from the revised backlog
Use the updated job-level estimates as the foundation for 2027 planning. Carry each project’s revised schedule, gross profit and billing and collection assumptions into the operating forecast. Layer in new awards using realistic start dates, win rates and capacity constraints.
Maintain a supported base case, a downside case and a management response case. Test delayed mobilizations, slower collections, weaker bid conversion and continued cost pressure. Connect the annual forecast to a rolling 13-week cash flow forecast so payroll, supplier deposits, retainage and debt service remain visible.
Use industry indexes as external reference points, then calibrate assumptions to current quotes, local labor conditions and actual project performance. The September data is a reason to refresh the forecast; it is not an 11.9% escalation assumption for 2027.
A focused year-end review for construction leaders
Before approving the year-end close and 2027 budget, ask the project and finance teams to answer five questions:
Which jobs have the largest unpriced cost exposure?
Which estimates to complete have not been refreshed with current field information?
How much expected profit depends on unresolved change orders?
When does backlog create the greatest cash requirement?
What decisions follow if margin, delivery or liquidity triggers are breached?
Agree on one review date, one set of assumptions and clear accountability for revisions. Strong construction accounting gives leadership an earlier view of risk—and enough time to change purchasing, staffing, pricing or financing decisions.
Turn project data into decisions
Our CFO and strategic finance advisory services support forecasting, cash-flow planning and profitability analysis. Contact our team to discuss a year-end review of job costing, WIP and your 2027 planning process.
This article provides general educational information and is not accounting, tax, legal or investment advice. Contract terms, revenue recognition and financial reporting requirements depend on the specific facts and applicable framework. Consult your professional advisers before acting. Source information reviewed October 16, 2026.
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