Steel, ocean freight and diesel lead input-cost pressure; resins and chips are easing
Our new Cost Pressure Monitor tracks 12 categories procurement teams buy most. Seven are rising, led by steel and deep-sea freight, while aluminum, plastic resins and semiconductors have turned lower.
Article summary
- Why it matters: Price pressure is no longer broad-based. Metals, fuel and freight are still climbing fast enough to justify locking in terms, while several chemical and electronics categories have rolled over. A single “inflation” assumption in 2027 budgets will be wrong in both directions.
- What to do first: Steel and freight: extend fixed-price or capped terms where suppliers will agree, and push for index-linked escalation where they won’t. Flat percentage increases tend to lag in a market moving this fast.
- Diesel-exposed spend: review fuel surcharge tables in carrier and delivered-price contracts. Volatility makes surcharge mechanics matter more than the base rate.
- +23.4%
- steel mill products, 12 months
- +32.0%
- deep-sea freight, 12 months
- +77.8%
- No. 2 diesel, 12 months
- −3.1%
- semiconductors, 12 months
On this page
The details
Procurement Signal’s Cost Pressure Monitor launches today. It reads U.S. producer price data for 12 categories each month and labels each as rising fast, rising, stable or easing, based mainly on the three-month pace of change, annualized. Data runs through August 2026.
Rising fast (3):
- Steel mill products are up 23.4% over 12 months and hit a new high in August. The three-month pace is above 40% annualized. Section 232 duties of 50% on most steel articles, applied to full customs value since April 6, sit on top of that for importers.
- Deep-sea freight is up 32.0% on the year, with prices near their 24-month high.
- No. 2 diesel is up 77.8% on the year. It jumped 17.7% in August after easing from a May peak, so the trend is volatile rather than settled.
Rising (4): copper and brass mill shapes (+20.9% on the year, at a 12-month high), electrical machinery and equipment (+13.5%), lumber (+7.6%) and converted paper and paperboard, which includes corrugated boxes (+4.4%, but accelerating to a 12.9% annualized pace).
Stable (1): truck transportation, up 11.6% on the year but flat over the last three months.
Easing (4): aluminum mill shapes (still up 27.3% on the year, but 5.9% below their June high), plastic resins, industrial chemicals and semiconductors. Semiconductor producer prices are down 3.1% over 12 months and are the only category below year-ago levels.
All 12 categories at a glance
| Category | 12-month change | 3-month pace, annualized | Distance from 12-month high | Tariff note |
|---|---|---|---|---|
| Steel mill products | +23.4% | +40.7% | At the high | Section 232: 50% on full value |
| Deep-sea freight | +32.0% | +42.0% | 0.5% below | — |
| No. 2 diesel | +77.8% | −22.1% | 6.1% below | — |
| Copper and brass mill shapes | +20.9% | +1.8% | At the high | Section 232 covers copper |
| Electrical machinery and equipment | +13.5% | +7.6% | At the high | 15% Section 232 rate on some grid equipment |
| Lumber | +7.6% | +7.9% | 1.5% below | Section 232 on wood products |
| Converted paper and paperboard | +4.4% | +12.9% | At the high | — |
| Truck transportation | +11.6% | +1.3% | At the high | — |
| Aluminum mill shapes | +27.3% | −13.8% | 5.9% below | Section 232: 50% on full value |
| Industrial chemicals | +13.3% | −6.4% | 2.5% below | — |
| Plastic resins and materials | +6.6% | −29.9% | 8.5% below | — |
| Semiconductors | −3.1% | −21.2% | 7.0% below | Section 232 on semiconductors |
Figures are our calculations from U.S. Bureau of Labor Statistics producer price indexes via FRED, through August 2026. Diesel is labeled rising fast because it jumped 17.7% in August, even though its three-month pace is negative; see the full method.
How to read the labels
The three-month annualized pace tells you where prices are heading now; the 12-month change tells you how far they have already moved. The gap between them is where negotiation opportunity sits:
- High 12-month change, still accelerating (steel, ocean freight): suppliers have pricing power. Protect supply and cap exposure.
- High 12-month change, now falling (aluminum, chemicals, resins): your contract may be priced near the top. This is the moment to re-quote.
- Low 12-month change, accelerating (corrugated): increases are coming. Lock terms before the next reset.
- Falling on both measures (semiconductors): ask suppliers to share the decline, but check landed cost after duties.
Which index to write into a contract
Each category in the monitor is built on a public U.S. producer price index series that anyone can look up on FRED. These are the series IDs. They are commonly used as the reference in escalation and de-escalation clauses because they are published monthly by the Bureau of Labor Statistics and are hard for either side to dispute:
| Category | BLS series ID |
|---|---|
| Steel mill products | WPU1017 |
| Aluminum mill shapes | WPU102501 |
| Copper and brass mill shapes | WPU102502 |
| Plastic resins and materials | WPU066 |
| Industrial chemicals | WPU061 |
| No. 2 diesel fuel | WPU057303 |
| Deep-sea freight | PCU483111483111 |
| Truck transportation | PCU484484 |
| Semiconductors and related devices | PCU334413334413 |
| Electrical machinery and equipment | WPU117 |
| Lumber | WPU081 |
| Converted paper and paperboard | WPU0915 |
A broad producer index won’t match every specification. For a part where one material dominates cost, a market price for that grade may track better. For mixed-material parts, a weighted basket of two or three indexes often works.
What a sound index clause covers
- The index and the month. Name the series ID and which month’s value applies, since producer price data is revised for several months after release.
- The share of price that moves. Only the material share of the price should float; labor and overhead have their own drivers.
- A trigger band. For example, adjust only when the index moves more than 3% from the base.
- Both directions. Prices go down when the index falls, on the same formula.
- Timing. How often prices reset, and how much notice each side gets.
These are our suggestions, not legal advice. Have your legal team review clause wording.
A worked example
Suppose a fabricated steel part costs $100, of which $40 is steel. If the steel index rises 23.4%, as it did over the 12 months to August, an index clause that floats only the steel share would raise the price by $9.36, to $109.36. A supplier asking for a flat 23% increase on the whole part would be asking for $23. These are our calculations; the gap is why procurement teams ask suppliers to show the material share of their price.
What procurement teams should do
- Steel and freight: extend fixed-price or capped terms where suppliers will agree, and push for index-linked escalation where they won’t. Flat percentage increases tend to lag in a market moving this fast.
- Diesel-exposed spend: review fuel surcharge tables in carrier and delivered-price contracts. Volatility makes surcharge mechanics matter more than the base rate.
- Aluminum and resins: avoid committing to long fixed prices set at spring highs. Use the pullback to re-quote.
- Packaging: corrugated pricing is accelerating from a low base. Check when your box contracts reset.
- Budgets: set category-specific inflation assumptions for 2027 instead of a single rate.
What to watch next
- September producer price data. The next monthly update will show whether steel’s 40%-plus annualized pace is holding or whether August was the peak.
- Diesel volatility. A 17.7% one-month jump after a spring decline means fuel surcharge tables will swing again; watch weekly EIA prices alongside the monthly index.
- Easing categories turning. Aluminum, resins, chemicals and chips are easing now. If they flatten, the window to re-quote closes.
The bigger picture
Producer prices measure what suppliers receive, before duties and freight. For imported metals and electrical equipment, Section 232 tariffs mean landed cost is rising faster than these indexes show. The monitor flags those categories, and the Tariff & Trade Deadline Tracker lists the dates that change them. We’ll update the monitor each month when new producer price data is released.
Questions procurement teams are asking
Which input costs are rising fastest for procurement teams?
Steel mill products, deep-sea freight and No. 2 diesel are rising fastest in our Cost Pressure Monitor, based on U.S. producer price data through August 2026.
Which categories are easing?
Aluminum mill shapes, plastic resins, industrial chemicals and semiconductors are easing over three months, although aluminum is still well above a year ago.
How does the Cost Pressure Monitor classify categories?
It reads monthly U.S. producer price indexes for 12 categories and labels each rising fast, rising, stable or easing, based mainly on the annualized three-month pace of change.
Where can I see the price trend for each category?
Each category in the Cost Pressure Monitor has its own page with 25 months of producer price history, the current label and our read on what it means for contracts.
Which producer price index should I use for steel escalation clauses?
Our Cost Pressure Monitor uses the BLS producer price index for steel mill products, series WPU1017 on FRED. For parts made from a specific grade, a market price for that grade may track cost more closely.
How should an index-linked price clause handle a supplier's labor and overhead?
Only the material share of the price should move with a material index. Labor, overhead and margin have different drivers and are usually handled with a separate index or a fixed annual review.
How we reported this
This signal report draws on 2 sources, listed below, and reflects figures as reported on October 12, 2026. The sections on why it matters and what procurement teams should do are Procurement Signal analysis. It is not legal or financial advice. See our editorial standards.
