Construction Materials Prices Jumped 2.6% in May — Now Up Nearly 10% Year-Over-Year. Here’s What It Means for Your Bids.
The latest BLS data shows the steepest single-month construction input increase in months — and the inflationary pressure is broad-based.
If you’ve been feeling like materials pricing has gotten less predictable over the past two months, the numbers released this week confirm it. According to an Associated Builders and Contractors analysis of U.S. Bureau of Labor Statistics Producer Price Index data released June 11, overall construction input prices increased 2.6% during May and were 9.6% higher than a year earlier.
That’s a significant jump — and it’s not isolated to one category of materials.
The Breakdown
Nonresidential construction input prices rose 2.4% in May and 9.7% year over year. For contractors who track the broader BLS measures that include both materials and services purchased by contractors — a slightly different lens — that figure rose 1.7% in May and 8.1% year over year, while a comparable index for new nonresidential construction increased 1.8% during the month and 8.4% from a year earlier.
However you slice it, the direction is the same: construction input costs are accelerating, not stabilizing.
Metals Are the Story
If you’re wondering what’s driving this, look at metals. The BLS producer price index for metals and metal products rose from roughly 307 in January 2025 to nearly 380 in May 2026 — an increase of nearly 24% in just sixteen months. For contractors doing structural steel, rebar, mechanical, or electrical work — anything with significant metal content — this is the number driving your cost increases.
The Bigger Economic Picture
This isn’t just a construction story — it’s part of a broader inflationary trend. The Producer Price Index for final demand rose 1.1% in May, with prices for stage 1 intermediate demand — the earliest stage of production — advancing 12.3% for the 12 months ended in May, the largest 12-month increase since June 2022. Unprocessed goods for intermediate demand moved up 4.9% in May alone, with more than two-thirds of that increase tied to an 11.8% jump in crude petroleum prices.
In plain terms: the inflationary pressure is starting at the earliest stages of the supply chain — raw materials and energy — and working its way through to finished construction materials. That tells us this isn’t a one-month blip; it’s a trend with momentum behind it.
One Bit of Good News: Lumber
Not every category is rising. The indexes for asphalt and for particleboard and fiberboard moved lower in May — continuing a moderation trend we noted in last month’s Predictive Pipeline, where lumber-related indexes had pulled back from their fall 2025 highs. Washington State Department of Transportation
What This Means for NW Contractors
The 9.6% year-over-year increase in overall construction input prices is the clearest signal yet that contractors should not be using 2025 cost data — or even early 2026 cost data — to price jobs today. If your estimating database hasn’t been updated since the start of the year, you are very likely underpricing your bids right now, particularly on anything with significant metal content.
Three immediate actions:
1. Update your unit costs for metals-heavy line items now. Structural steel, rebar, mechanical piping, electrical conduit and wire, HVAC equipment — these categories are seeing the steepest increases and the most exposure.
2. Consider building escalation clauses into anything beyond 60 days. With input prices up 2.6% in a single month, a project that takes four to six months to complete could see material costs increase 8-10% between bid and procurement if your contract doesn’t account for it. Speak with your attorney if necessary.
3. Lock in pricing on long-lead items as early as possible. If metals pricing continues its current trajectory, ordering steel and mechanical equipment early — even before you’re ready to install it — could meaningfully protect your margin on a project.
The Bottom Line
A 9.6% year-over-year increase in construction input prices is not a small number — it’s a meaningful erosion of margin for any contractor still pricing work based on last year’s numbers. The next PPI release comes July 15. Watch it closely — if this acceleration continues for a second consecutive month, it confirms a trend rather than a one-time spike.
NW Construction News provides general business information only. Consult the BLS PPI database directly at bls.gov/ppi for the most current data, and consult a qualified construction accountant/attorney for guidance specific to your business.
