The Ministry of Statistics and Programme Implementation (MoSPI) has instructed all Indian states to adopt 2022-23 as the new base year for Gross State Domestic Product (GSDP) calculations by the end of fiscal year 2027. This directive follows the earlier revision of the national GDP series, which shifted its base year from 2011-12 to 2022-23 in February. The aim is to improve the accuracy and comparability of regional economic data across India. Currently, 34 states and union territories compile GSDP using the old base year, with exceptions for Lakshadweep and Dadra & Nagar Haveli and Daman & Diu. The MoSPI has issued guidelines emphasizing the use of administrative records and sectoral databases to enhance the reliability of regional statistics. While some states are progressing faster in this transition, all must comply by the set deadline. Additionally, there is no requirement for states to revise the base year for the Index of Industrial Production (IIP), although the Centre is open to assisting those who wish to make changes.