Date: 2026-05-25Category: Press ReleaseState: Union GovernmentCountry: India
Press note on release of the Report of the Technical Advisory Committee on Base Year Revision of the All-India Index of Industrial Production from 2011-12 to 2022-23
**Executive Summary**
The Ministry of Statistics and Programme Implementation (MoSPI) has released the Technical Advisory Committee (TAC) report regarding the base year revision of the All-India Index of Industrial Production (IIP) from 2011-12 to 2022-23. The revision introduces methodological improvements, expanded sectoral coverage, and alignment with modern industrial classifications to enhance index accuracy. The official launch of the new IIP series is scheduled for June 1, 2026, which will include index values dating back to April 2023.
**Key Points / Main Content**
**Expanded Scope and Coverage**
* The new IIP series includes additional sectors: Minor Minerals, Rare Earth Minerals, Gas Supply, Water Supply, and Sewerage & Waste Management.
* The item basket has been updated to 1,042 products mapped to 463 item groups, removing outdated commodities and adding relevant ones.
* The series is now aligned with the National Industrial Classification (NIC-2025).
**Increased Granularity**
* Introduction of separate sub-indices for electricity generated from renewable and non-renewable sources.
* The Mining and Quarrying sector is now bifurcated into three sub-indices: Fuel Minerals, Metallic Minerals (including Rare Earth Minerals), and Non-Metallic Minerals (including Minor Minerals).
* Manufacturing sector indices will be provided at the 2-digit level of NIC-2025.
**Methodological Enhancements**
* Permanently closed factories or those with significantly altered production lines will be substituted with comparable units.
* The factory panel will be augmented by incorporating newly commissioned large-scale factories during the currency of the series.
* The Geometric Mean method will be adopted for linking the 2011–12 series with the new 2022–23 series at aggregated levels.
**Timeline and Reporting**
* Official launch date: June 1, 2026.
* The first release will provide index values from April 2023 onwards, including Quick Estimates for April 2026.
* Output will include the All-India General Index, sector-wise indices, Use-based Classification, and linking factors.
**Impact Analysis**
**Data Users (Economists, Academicians, and Policymakers)**
**Impact**
Users will have access to more robust, accurate, and granular data that reflects the current industrial landscape, including specific insights into renewable energy and modern waste management.
**Action Required**
Users should review the TAC-IIP report to understand the new methodology and linking factors to ensure correct interpretation of the transitioned data series starting June 1, 2026.
**Industrial Units and Factories**
**Impact**
Large-scale factories and those in newly included sectors (like Rare Earth Minerals or Water Supply) may now be included in the reporting panel, while obsolete units are removed.
**Action Required**
Newly incorporated large-scale factories must prepare to provide production data aligned with the NIC-2025 classification requirements.
**State Directorates of Economics and Statistics (DESs)**
**Impact**
State-level agencies are involved in the consultative process and will be affected by the changes in classification and the expanded scope of the index.
**Action Required**
DESs must align their data collection and reporting procedures with the updated methodological enhancements and the 2022-23 base year standards.
Key Entities Referenced
All-India Index of Industrial Production (IIP): The primary economic indicator measuring industrial growth, undergoing a base year revision from 2011-12 to 2022-23 to include expanded sectors like Rare Earth Minerals and Waste Management.
Technical Advisory Committee (TAC-IIP): The expert body, chaired by Dr. Mridul K. Saggar, constituted to guide the revision process and recommend methodological improvements for the industrial index.
Ministry of Statistics and Programme Implementation (MoSPI): The nodal ministry responsible for releasing the TAC-IIP report and overseeing the launch of the updated industrial production data series.
National Industrial Classification (NIC-2025): The classification standard used to align the revised item basket and sectoral groupings in the new IIP series.
Report of the Technical Advisory Committee on Base Year Revision of the IIP: The central policy document detailing the procedures, methodology, and recommendations for the transition to the 2022-23 base year series.
Ministry of Statistics & Programme Implementation
Press note on release of the Report of the
Technical Advisory Committee on Base Year
Revision of the All-India Index of Industrial
Production from 2011-12 to 2022-23
Posted On: 25 MAY 2026 4:00PM by PIB Delhi
The Ministry of Statistics and Programme Implementation (MoSPI) is releasing, through this press note,
the Report of the Technical Advisory Committee on Base Year Revision of the All-India Index of Industria
l Production (TAC-IIP).
To guide the base year revision process, a Technical Advisory Committee (TAC) for the base year revision
of the All-India Index of Industrial Production (IIP) was constituted in September 2024 under the
chairmanship of Dr. Mridul K. Saggar, Professor at IIM Kozhikode and comprised of experts from leading
academic institutions, chief economists, senior officials from the Government of India and the State
Directorates of Economics and Statistics (DESs). The TAC-IIP held eleven meetings, during which the
Committee engaged in extensive deliberations on various aspects of base revision of IIP, with a strong
focus on methodological improvements to enhance the robustness, accuracy and relevance of the index.
As part of the consultative approach, three discussion papers: (i) “Substitution of Factories in the
Compilation of the Index of Industrial Production (IIP)”, (ii) “Adoption of Chain-Based Index of Industrial
Production (IIP)”, and (iii) “Seasonal Adjustment of Index of Industrial Production” were released in the
public domain. Inputs and suggestions were sought from experts, academicians, government organizations
and the general public. In addition, three consultative workshops were also conducted for stakeholder
consultation and to raise awareness about the proposed changes in the new IIP series.
Major Changes in New Series of IIP with base 2022-23 are:
a. The new IIP series expands its scope by including Minor Minerals, Rare Earth Minerals,
Gas Supply, Water Supply and Sewerage & Waste Management, thereby broadening the
overall coverage of the index.
b. The item basket and weights have been revised to add relevant commodities and remove
outdated ones, ensuring that each item or sector is assigned appropriate significance. The
revised basket consists of 1,042 products mapped to 463 item groups. The updated IIP series
is aligned with the National Industrial Classification (NIC-2025).
c. The new series also introduces greater granularity through sub-indices, including separate
indices for electricity generated from renewable and non-renewable sources. Similarly, the
Mining and Quarrying sector is now divided into three sub-indices covering Fuel Minerals,
Metallic Minerals (including Rare Earth Minerals), and Non-Metallic Minerals (including
Minor Minerals).
d. In addition, methodological enhancements have been proposed in index compilation. These
include the substitution of factories that are permanently closed or have significantly altered
their production lines with comparable units, as well as the augmentation of panel of thefactories by incorporating newly commissioned large-scale factories that begin producing
relevant items during the currency of the IIP series.
e. The new series will adopt the Geometric Mean method for linking the 2011–12 series with the
new 2022–23 series. The linking factors will be computed at aggregated levels, namely for the
General Index and the Sectoral Indices.
Report
The report presents the procedures followed for the base revision exercise, highlights the improvements in
methodology, sectoral coverage and data granularity introduced in the new IIP series (2022–23) and
provides comprehensive recommendations made by the TAC-IIP.
The release of this report is intended to help users better understand and assimilate the IIP 2022–23 series
ahead of its official launch on 01 June 2026. The first release will present index values starting from April
2023 onwards, including Quick Estimates of April 2026. Along with the All-India General Index of the
IIP, the release will also include sector-wise indices for Mining and Quarrying, Manufacturing, Electricity
& Gas Supply and Water Supply, Sewerage & Waste Management. In addition, it will provide
manufacturing sector indices at the 2-digit level of NIC-2025, indices based on Use-based Classification
and linking factor, all scheduled for release on 01 June 2026.
(Scan the QR code below to access the TAC-IIP Report)
Click Here To See PDF
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