CONSUMER PRICE INDEX NUMBERS ON BASE 2012=100 FOR RURAL, URBAN AND COMBINED FOR THE MONTH OF DECEMBER, 2025

1. At a Glance

• Consumer Price Index (CPI) — official measure of retail inflation in India, released monthly by NSO, Ministry of Statistics & Programme Implementation (MoSPI) on base 2012=100 [1][2].
• December 2025 release flags headline inflation at 1.33%, the fourth consecutive month below RBI's 2% lower tolerance limit, and food inflation negative for the seventh straight month — an unusual disinflation episode of macro-policy significance [1].
• Examinable for Prelims (data points, methodology) and Mains GS-III (monetary policy, inflation targeting, food economy).

2. Why in the News

• MoSPI/PIB released the December 2025 CPI bulletin on 12 January 2026 [1][2].
• Headline CPI YoY at 1.33% (provisional), up 62 bps from November 2025 but still under the RBI tolerance band of 4 ± 2 % [1].
• CFPI (food) at –2.71%, rural –3.08%, urban –2.09%; food deflation persisted for the seventh consecutive month [1].
• Raises questions on whether RBI's MPC will trigger the statutory failure clause (target breach for 3 consecutive quarters) under Section 45ZN of the RBI Act [1].

3. Background & Evolution

• 1995: CPI-IW (Industrial Workers) regime dominated; separate CPI-AL/RL and CPI-UNME existed.
• Jan 2011: CPI (Rural/Urban/Combined) launched on base 2010=100 by CSO [2].
• 2015: Base year revised to 2012=100; weights updated using NSS 68th Round (2011-12) Consumer Expenditure Survey [2].
• 2016: Flexible Inflation Targeting (FIT) framework adopted; CPI-Combined notified as nominal anchor under the amended RBI Act, 1934 — target 4% (±2%) [1].
• 2026: Base-year revision exercise (to 2024=100, using HCES 2022-23/2023-24) under preparation by MoSPI [2].

4. Core Static Facts

• Releasing body: National Statistical Office (NSO), MoSPI [1].
• Base year: 2012 = 100 [1].
• Frequency: Monthly, on the 12th of the following month [1].
• Indices published: CPI-Rural, CPI-Urban, CPI-Combined, CFPI (Consumer Food Price Index) [1].
• Weighting source: Modified Mixed Reference Period of NSS 68th Round CES (2011-12) [2].
• Price collection: ~1,181 villages and ~1,114 urban markets (sample frame); coverage in Dec 2025 — 100% villages, 98.56% urban markets; market-wise reporting 89.36% rural, 92.71% urban [1].
• Inflation target (RBI): 4% CPI-Combined, tolerance band 2-6%, set by Centre in consultation with RBI under Section 45ZA, RBI Act 1934 (FIT framework) [1].
• Dec 2025 key numbers:
• Headline CPI YoY: 1.33% (Nov 2025: ~0.71%; +62 bps) [1].
• CFPI YoY: –2.71% (Nov 2025: ~–3.91%; +120 bps) [1].
• Rural CFPI: –3.08%; Urban CFPI: –2.09% [1].

5. Multi-Dimensional Analysis

Economic

• Sub-2% headline gives RBI MPC headroom for policy rate cuts; real policy rate has widened sharply [1].
• Negative food inflation hurts farm terms of trade, depressing rural nominal incomes despite low CPI [1].
• Drivers of December uptick: vegetables, meat & fish, egg, spices, pulses, personal care — base effects waning [1].

Legal / Constitutional

• CPI-Combined is the statutory anchor under Section 45ZA-45ZN of the RBI Act, 1934 (inserted 2016) [1].
• A breach of the band for 3 consecutive quarters obliges RBI to submit a report to the Centre; current 4-month sub-band run does not yet meet quarterly-average threshold [1].

Administrative

• Rural prices collected by Department of Posts; urban by NSO field offices [2].
• Data weighting bias: 2011-12 consumption basket is outdated — HCES 2022-23/2023-24 results released by MoSPI flagged sharp fall in food share, motivating base revision [2].

Social

• Rural food deflation (–3.08%) sharper than urban (–2.09%) — uneven welfare effect; consumer gain offset by producer income squeeze for farmers [1].

6. Recent Developments (last 12-18 months)

• Aug 2025 onward: Headline CPI began undershooting 2% lower tolerance; Dec 2025 is fourth consecutive month [1].
• Jun 2025 onward: CFPI turned negative; seventh consecutive month of food deflation in Dec 2025 [1].
• Feb 2024: MoSPI released HCES 2022-23 factsheet — basis for CPI base-year revision to 2024=100 [2].
• 12 Jan 2026: PIB/MoSPI release of December 2025 CPI bulletin [1][2].

7. Prelims Hooks

• CPI base year (current): 2012=100 [1].
• Releasing agency: NSO under MoSPI (not RBI, not Labour Bureau) [1].
• CPI-IW is released by Labour Bureau, Ministry of Labour & Employment — base 2016=100 (distinct from CPI-C) [2].
• RBI inflation target nominal anchor: CPI-Combined [1].
• Inflation target: 4% ± 2% under Section 45ZA, RBI Act 1934 [1].
• December 2025 headline inflation: 1.33% (provisional) [1].
• December 2025 CFPI: –2.71%; rural –3.08%, urban –2.09% [1].
• Headline rose 62 bps, food rose 120 bps vs November 2025 [1].
• Fourth consecutive month below lower tolerance limit of 2% [1].
• Seventh consecutive month of negative food inflation [1].
• December 2025 price collection: 100% of sampled villages, 98.56% of urban markets [1].
• CPI release date convention: 12th of the following month [1].
• Weights of current CPI series derived from NSS 68th Round CES (2011-12) [2].
• CFPI sub-group examples driving December rise: vegetables, pulses, eggs, meat & fish, spices [1].

8. Mains Relevance

• GS-III: Indian Economy — Inflation, Monetary Policy, FIT framework, Food Economy.
• Syllabus tags: "Issues relating to growth, development and employment", "Government Budgeting", "Issues related to direct & indirect farm subsidies and MSP".
• Likely question stems: 1. "Persistent food deflation alongside sub-target headline CPI presents a paradox for India's Flexible Inflation Targeting framework. Discuss." 2. "Examine the limitations of using a 2011-12 consumption basket for CPI in 2025-26. How would a base revision to 2024=100 alter monetary policy signals?" 3. "Distinguish between CPI-Combined, CPI-IW and WPI. Which is the most appropriate nominal anchor for RBI's monetary policy and why?"

9. Related Topics to Study Next

• WPI (Wholesale Price Index) — Office of Economic Adviser, DPIIT; base 2011-12 — for divergence analysis.
• CPI-IW (2016=100) — used for DA indexation of central govt employees.
• Flexible Inflation Targeting (FIT) & MPC composition — Sections 45ZA-45ZN, RBI Act.
• Household Consumption Expenditure Survey (HCES) 2022-23 / 2023-24 — basis for CPI re-basing.
• Food Corporation of India & PM-Garib Kalyan Anna Yojana — food-price stabilisation mechanisms.
• MSP regime & CACP — links to rural producer-side impact of food deflation.
• Core inflation vs headline inflation — analytical distinction.
• GDP deflator — comparative inflation measure.

10. Common Errors / Trap Areas

• Wrong ministry: CPI-Combined is by MoSPI/NSO, NOT RBI; CPI-IW is by Labour Bureau, NOT MoSPI.
• Base-year confusion: CPI-C = 2012=100; CPI-IW = 2016=100; WPI = 2011-12.
• Tolerance vs target: RBI target is 4%, band 2-6%; the 4±2 is not "between 4 and 6".
• Anchor: Statutory anchor is CPI-Combined, not CPI-Rural, CPI-Urban or CPI-IW.
• Food deflation ≠ low headline: They are correlated but headline can stay sub-band even when non-food prices rise (as in Dec 2025).