Paving Mixtures Price Trends: BLS PPI Checklist for Bids
Estimating commercial paving, sitework, and asphalt patching requires tracking wholesale material price shifts before submitting bid proposals. The U.S. Bureau of Labor Statistics Paving Mixtures and Blocks PPI tracks producer price movements for asphalt paving products. Using a structured checklist based on published index numbers helps contractors protect operating margins against material volatility.
Checklist Step 1: Benchmark the Baseline Index Against Historical Data
Before pricing asphalt mix tonnage into an estimate, verify the latest index baseline. The producer price index for paving mixtures and blocks (series WPU1394) uses an index base period where 1982 equals 100. The latest reported monthly figure for September 2026 is 432.7, up from 432.2 in August 2026. This represents a month-over-month increase of +0.1%.
Longer-term comparisons show sustained pricing pressure over multi-year windows. The September 2026 level of 432.7 is +7.1% higher than the September 2025 level of 403.9, and +8.2% above the September 2024 value of 399.9. Looking back five years, the index was 323.0 in September 2021, meaning latest prices are +34.0% higher. Compared to the pre-pandemic level of 334.6 in January 2020, the index is up +29.3%.
| Timeline Period | Monthly Index Value | Change to September 2026 |
|---|---|---|
| September 2026 (Latest) | 432.7 | Baseline (0.0%) |
| September 2025 (One Year Earlier) | 403.9 | +7.1% |
| January 2020 (Pre-Pandemic) | 334.6 | +29.3% |
| September 2021 (Five Years Earlier) | 323.0 | +34.0% |
| March 2025 (Window High) | 450.7 | -4.0% |
Checklist Step 2: Track Annual Averages and Peak Windows
Annual index averages provide context when reviewing historical project costs. Annual averages computed from monthly figures show a steady multi-year climb:
- 2017: 293.4 (with the window low of 287.3 occurring in December 2017)
- 2018: 313.4
- 2019: 322.6
- 2020: 312.9
- 2021: 324.2
- 2022: 378.3
- 2023: 395.4
- 2024: 405.5
- 2025: 417.1
- 2026: 430.0 (computed from January through September)
The highest monthly value across the entire data window from January 2017 to September 2026 occurred in March 2025 at 450.7. The latest September 2026 figure of 432.7 sits -4.0% below that peak. Identifying where current levels sit relative to past high points helps estimators gauge whether material supply quotes reflect standard movement or abnormal spikes.
Checklist Step 3: Monitor In-Year Price Trajectories
Paving mix prices can shift significantly within a single calendar year. In 2026, the index opened at 436.1 in January, moved to 435.8 in February and 435.3 in March, and then dropped to 411.9 in April. From there, prices steadily rose through May (426.0), June (429.4), July (430.8), August (432.2), and September (432.7).
During the prior autumn and winter, the index moved from 403.9 in September 2025 to 407.8 in October, 408.1 in November, and 410.7 in December 2025. Tracking these monthly shifts reveals how quickly prices adjust during procurement windows. When evaluating quote expiration terms, estimators should account for how month-to-month mix movements influence project budgets.
Checklist Step 4: Account for Preliminary Data and Contract Structure
When incorporating federal data into project bids, estimators must account for reporting rules. All values published in the BLS commodity series WPU1394 are not seasonally adjusted. Furthermore, recent monthly values remain preliminary and subject to revision for four months after initial publication.
Contract type determines how much risk this revision window creates. When comparing project terms, review Lump Sum vs. Unit Price vs. Cost-Plus contracts to decide who absorbs asphalt mix cost increases between bid day and placement. On fixed-price agreements, incorporating formal Price Escalation Clauses tied to published commodity series can establish a clear formula for adjusting ton rates if material indices shift during long-term jobs.
Checklist Step 5: Execute the Pre-Bid Paving Verification
Before finalizing unit prices or bid proposals involving asphalt paving mixtures and blocks, run through these closing checks:
- Confirm the benchmark baseline using the latest available monthly PPI data (September 2026 at 432.7).
- Compare asphalt plant supplier quotes against the +7.1% one-year trend to ensure supplier increases align with market indices.
- Check whether plant pricing was locked during a trough or peak, noting that current values are -4.0% below the March 2025 high of 450.7.
- Account for the four-month preliminary revision window in any contracts referencing recent PPI values.
- Establish index-based adjustment terms in the bid proposal if material supply guarantees expire before paving operations begin.
Sources
Published October 31, 2026. No affiliate links on this page. Facts come from the sources linked above; check them for updates.