The services sector contributes the largest share to India's GVA but lacked a dedicated monthly output indicator until recently. Critically analyse.

Services contribute over half of India's Gross Value Added [5], yet the economy tracked its largest sector without a monthly output gauge comparable to the Index of Industrial Production. MoSPI's trial Index of Services Production (ISP), base year 2024-25, is a belated but significant corrective.

The gap and why it mattered

• Structural asymmetry: the IIP has measured industry monthly for decades, while the dominant services sector had no equivalent short-term indicator [2].
• Policy cost: RBI's monetary policy, GDP nowcasting and fiscal forecasting relied on annual surveys or the privately compiled, survey-based PMI.
• Genuine measurement difficulty: services output is heterogeneous and hard to define in volume terms; MoSPI's Approach Paper had to screen over 40 sub-sectors for usable data [2].

Merits of the ISP

• Methodological coherence: weights derived from sub-sectoral GVA shares in National Accounts, with the base year synchronised to the new CPI base for deflator consistency [4].
• New data infrastructure: uses GST returns and administrative data, converting tax digitisation into statistical capacity [2].
• Timeliness: monthly release on the 29th with roughly a 60-day lag [1].
• Early signal value: the first sub-sectoral trial covered 19 sub-sectors, with accommodation and food services (37.2%) and retail trade (30.8%) leading growth [3].

Limitations

• Confined to the formal sector, covering about 60% of services — informal services, a large employer, remain invisible [3].
• Still a trial series; a headline composite index awaits stability testing [1].
• GST turnover deflated by price indices only approximates real volume, risking distortion where price data is weak.

The ISP thus closes a long-standing blind spot in India's statistical system, though its credibility will rest on widening coverage beyond the formal core. A phased expansion to informal services, sharper service-specific deflators and timely transition from trial to official status would align it with the goal of evidence-based economic governance.