Price index database
Official indices: CPI-IW for the Labour Bureau's centres (base 2016 = 100, from January 2024) and the Wholesale Price Index for every item - the current series (base 2022-23 = 100, from April 2023) and the former series (base 2011-12 = 100, from January 2024 to April 2026, continued by linking). Escalation bills take their base and current indices from here.
Latest official month in the database: CPI-IW 2026-08, WPI 2022-23 2026-09, WPI 2011-12 2026-04 (linked to 2026-09). Source: Office of the Economic Adviser, DPIIT - Wholesale Price Index (base 2011-12=100) - eaindustry.nic.in. The OEA stopped this series after April 2026. Later months are linked: the 2022-23 index of the same item multiplied by a linking factor - the OEA's own factors for All commodities (1.53), Primary articles (1.71), Fuel & power (1.65) and Manufactured products (1.44), and for other items the ratio of the geometric means of their FY 2024-25 indices in the two series, the method the OEA used. Items with no clear successor in the new series are not linked; use the 2022-23 series for them. Values entered by hand are highlighted and kept when you update.
WPI Caustic soda (sodium hydroxide) [1310010006] Manufactured products
Linked values: from May 2026 = WPI 2022-23 [1310010015] x 2.2161 (item linking factor, ratio of FY 2024-25 geometric means).
| Month | Index | Change on previous month | Change over 12 months | WPI all commodities | Source |
|---|---|---|---|---|---|
| Sep 2026 | 160.00 | -6.4 | -3.03 % | 172.1 | linked (2022-23 × 2.2161) |
| Aug 2026 | 166.40 | -11.8 | +0.85 % | 169.5 | linked (2022-23 × 2.2161) |
| Jul 2026 | 178.20 | -4.4 | +6.39 % | 168.3 | linked (2022-23 × 2.2161) |
| Jun 2026 | 182.60 | -4.0 | +7.10 % | 168.8 | linked (2022-23 × 2.2161) |
| May 2026 | 186.60 | +9.5 | +8.05 % | 168.5 | linked (2022-23 × 2.2161) |
| Apr 2026 | 177.10 | +15.5 | +1.32 % | 167.6 | OEA |
| Mar 2026 | 161.60 | -0.3 | -7.97 % | 161.2 | OEA |
| Feb 2026 | 161.90 | -1.3 | -8.79 % | 158.4 | OEA |
| Jan 2026 | 163.20 | -0.1 | -9.68 % | 157.6 | OEA |
| Dec 2025 | 163.30 | +0.1 | -8.72 % | 157.2 | OEA |
| Nov 2025 | 163.20 | -0.7 | -5.17 % | 156.2 | OEA |
| Oct 2025 | 163.90 | -1.1 | +1.67 % | 155.1 | OEA |
| Sep 2025 | 165.00 | 0.0 | +7.07 % | 155.0 | OEA |
| Aug 2025 | 165.00 | -2.5 | +9.63 % | 155.2 | OEA |
| Jul 2025 | 167.50 | -3.0 | +12.42 % | 154.4 | OEA |
| Jun 2025 | 170.50 | -2.2 | +13.21 % | 153.7 | OEA |
| May 2025 | 172.70 | -2.1 | +13.77 % | 153.7 | OEA |
| Apr 2025 | 174.80 | -0.8 | +15.38 % | 154.2 | OEA |
| Mar 2025 | 175.60 | -1.9 | +20.94 % | 154.8 | OEA |
| Feb 2025 | 177.50 | -3.2 | +22.75 % | 154.9 | OEA |
| Jan 2025 | 180.70 | +1.8 | +24.19 % | 155.0 | OEA |
| Dec 2024 | 178.90 | +6.8 | - | 155.7 | OEA |
| Nov 2024 | 172.10 | +10.9 | - | 156.4 | OEA |
| Oct 2024 | 161.20 | +7.1 | - | 156.7 | OEA |
| Sep 2024 | 154.10 | +3.6 | - | 154.7 | OEA |
| Aug 2024 | 150.50 | +1.5 | - | 154.4 | OEA |
| Jul 2024 | 149.00 | -1.6 | - | 155.3 | OEA |
| Jun 2024 | 150.60 | -1.2 | - | 154.0 | OEA |
| May 2024 | 151.80 | +0.3 | - | 153.5 | OEA |
| Apr 2024 | 151.50 | +6.3 | - | 152.9 | OEA |
| Mar 2024 | 145.20 | +0.6 | - | 151.4 | OEA |
| Feb 2024 | 144.60 | -0.9 | - | 151.2 | OEA |
| Jan 2024 | 145.50 | - | - | 151.2 | OEA |
Enter a month by hand
For a month not yet in the database (e.g. from the latest press release). Updates from the website do not replace hand-entered values; enter the official figure here to correct one.