Last Updated September 2026
Series: 4/HM/R/18 Thermoplastic is part of the BCIS Price Adjustment Formulae Indices Series 4 - Highways Maintenance. Published monthly, the index measures the movement in the prices of the thermoplastic products.
| Date | Index | Status | On Year | On Quarter | On Month |
| Dec 21 | 114.6 | Firm | 5.90% | 1.10% | 1.10% |
| Dec 22 | 139.7 | Firm | 21.90% | 0.50% | -3.90% |
| Dec 23 | 132.9 | Firm | -4.90% | -0.50% | -2.40% |
| Dec 24 | 130.2 | Firm | -2.00% | -0.80% | -0.60% |
| Jan 25 | 130.1 | Firm | -2.20% | -0.80% | -0.10% |
| Feb 25 | 129.1 | Firm | -2.60% | -1.50% | -0.80% |
| Mar 25 | 129.7 | Firm | -2.00% | -0.40% | 0.50% |
| Apr 25 | 130.8 | Firm | -0.10% | 0.50% | 0.80% |
| May 25 | 130.5 | Firm | -0.50% | 1.10% | -0.20% |
| Jun 25 | 130.1 | Firm | -0.70% | 0.30% | -0.30% |
| Jul 25 | 132.3 | Firm | 0.80% | 1.10% | 1.70% |
| Aug 25 | 132.1 | Firm | 0.80% | 1.20% | -0.20% |
| Sep 25 | 131.6 | Firm | 0.30% | 1.20% | -0.40% |
| Oct 25 | 130.9 | Firm | -0.20% | -1.10% | -0.50% |
| Nov 25 | 131.4 | Firm | 0.30% | -0.50% | 0.40% |
| Dec 25 | 130.9 | Firm | 0.50% | -0.50% | -0.40% |
| Jan 26 | 131.4 | Firm | 1.00% | 0.40% | 0.40% |
| Feb 26 | 130.2 | Firm | 0.90% | -0.90% | -0.90% |
| Mar 26 | 132.1 | Firm | 1.90% | 0.90% | 1.50% |
| Apr 26 | 136.2 | Firm | 4.10% | 3.70% | 3.10% |
| May 26 | 137.1 | Firm | 5.1% | 5.3% | 0.7% |
| Jun 26 | 137.0 | Firm | 5.3% | 3.7% | -0.1% |
| Jul 26 | 137.0 | Firm | 3.6% | 0.6% | 0.0% |
| Aug 26 | 137.0 | Firm | 3.7% | -0.1% | 0.0% |
Thank you to those RSMA members who regularly share their price data for this index. We would encourage more RSMA members to contribute to this index, to result in a more robust index, tracking price movements more effectively.
If you would like to become a contributor to this index or have any questions, please contact contactbcis@bcis.co.uk, or call +44(0) 330 341 1000.
BCIS (Building Cost Information Service) provides independent construction and cost price data to the Built Environment. Visit BCIS.co.uk or call +44(0) 330 341 1000.
