CPI Inflation September 2026: 5.54% on the 2024 Base Series

🗞️ Why in News On 12 October 2026, the Ministry of Statistics and Programme Implementation (MoSPI) released the Consumer Price Index (CPI) for September 2026 on the new base 2024=100. Retail inflation was 5.54% (provisional), up from 4.83% in August (final): rural 6.08%, urban 4.88%. Food inflation, measured by the Consumer Food Price Index (CFPI), rose to 7.74% from 5.97%. It is the highest of the nine monthly prints of the new series so far, and still inside the 2 to 6 per cent band around the 4 per cent inflation target.

The September Print at a Glance

• The index level: CPI (General), combined, rose from 108.74 in August to 109.49 in September.
• Revisions: August was first released as 4.82% and revised to 4.83%; food inflation for August, first 5.95%, is now 5.97%. September’s figures are provisional and can change the same way.
• Next release: the CPI for October 2026 is scheduled for 12 November 2026.

Nine Months of the New Series

Every month of 2026 so far has been higher than the one before. The series begins in January 2026, so September’s 5.54% can be ranked only against these nine prints.

• The first print: January’s figure was 2.75% (provisional), released on 12 February 2026; it is now 2.74%.

Old Series and New: Why the Two Cannot Be Compared

For context: MoSPI revised the base year of the CPI from 2012=100 to 2024=100; the revised series was released on 12 February 2026. Under the 2024 series, inflation data is available from January 2026; the 2012 series runs up to December 2025. MoSPI’s own caution: “A direct comparison of inflation under the new series with that of the previous series is not feasible on account of the changes in the item basket, weights, coverage of markets and methodology between the two series.”

• Basket and weights: the item basket and weights of the new series are based on the Household Consumption Expenditure Survey (HCES) 2023-24.
• Inside the 12 divisions: 43 groups, 92 classes, 162 subclasses and 358 items.
• Food’s share: in MoSPI’s words, the “Share of Food & Beverages is declined in the new series, however, it continues to remain the largest component of the CPI basket.”
• Markets: 1,465 rural markets and 1,395 urban markets across 434 towns, plus 12 online markets.

So a headline that sets September 2026 beside a month of 2024 or 2025 is comparing two different measuring rods.

What Pushed Prices Up

By division (combined, September 2026):

By item (combined, September 2026):

• Highest: onion 108.09% (48.78% in August), silver jewellery 87.80% (106.81% in August), ginger 62.85%, garlic 54.62%, lemon 36.41%.
• Lowest: potato -11.50%, tomato -8.62%, motor car and jeep -4.51%, lady’s finger -4.48%, coconut -3.99%.

Reading the numbers:

• Vegetables turned. Onion inflation more than doubled in a month, and the fall in tomato prices shrank from 31.09% in August to 8.62%. Together they help explain the jump in the food index (our reading).
• Precious metals. The 13.75% in personal care and miscellaneous goods sits beside silver jewellery at 87.80%. The release does not draw the link in words; it is our reading.
• Household fuels were low. The housing, water, electricity, gas and other fuels division was at 2.74%, and the electricity, gas and other fuels group at 3.24%. The release’s text gives no separate inflation figure for petrol, diesel or LPG, whose prices are recorded as on the 15th of each month.

Rural, Urban and the States

• Rural inflation (6.08%) ran above urban (4.88%), and rural food inflation (8.06%) above urban (7.18%).
• Highest among States and Union Territories (our ranking from Annexure III, all States and UTs; PIB’s own top-five list covers only States with more than 50 lakh population): Puducherry 6.86%, Tamil Nadu 6.81%, Odisha 6.70%, Madhya Pradesh 6.68%, Telangana 6.64%.
• Lowest: Mizoram 2.85%, Nagaland 3.22%, NCT of Delhi 3.40%, Meghalaya 3.59%, Arunachal Pradesh 3.70%.

How the CPI Is Built

• Who collects: field staff of the Field Operations Division of the National Statistics Office (NSO), MoSPI, through personal visits on a weekly roster.
• Where: prices from 1,407 urban markets (including online markets) and 1,465 villages covering all States and UTs. In September 2026 the response rate was 100% in both rural and urban markets.
• How: data is collected on handheld devices through Computer Assisted Personal Interviewing (CAPI).

The Inflation Target and the RBI

• The target: a Gazette notification of 25 March 2026 (S.O. 1580(E)) renewed the inflation target of 4 per cent with a ±2 per cent tolerance band for five more years, through March 2031. Under Section 45ZA of the RBI Act, 1934, “The Central Government shall, in consultation with the Bank, determine the inflation target in terms of the Consumer Price Index, once in every five years”. The first target ran from 2016 to 2021 and was retained to 2026 by a Gazette notification of 31 March 2021.
• Where September sits: at 5.54%, inflation is inside the band, below its upper limit of 6%.
• The RBI’s move before this print: on 7 October 2026 the Monetary Policy Committee (MPC) raised the repo rate by 25 basis points to 5.50 per cent by a unanimous vote, and moved to a stance of calibrated tightening. The stance change was not unanimous: two members, Dr Nagesh Kumar and Prof. Ram Singh, wanted it kept at neutral. It projected CPI inflation at 5.2 per cent for 2026-27, with Q2 at 4.9 per cent, Q3 at 6.0 per cent and Q4 at 5.7 per cent. For the decision, see our 8 October explainer, and for the RBI’s follow-up liquidity and currency steps, our 10 October piece.
• Against the projection: the average of July (4.45%), August (4.83%) and September (5.54%) is 4.94%, close to the RBI’s Q2 projection of 4.9 per cent. (This average is our calculation, not an official figure.)
• What is scheduled: the MPC’s minutes are due on 21 October 2026, and its next meeting is scheduled for 2 to 4 December 2026. Aditi Nayar of ICRA, quoted by The Hindu, said inflation was “appearing set to cross 6% in the ongoing month”; that is her forecast.

Why It Matters

• Food is the driver. Onion, ginger and garlic, and a smaller fall in tomato prices, pushed CFPI to 7.74%. A repo rate works through demand; it cannot add onions to the market, so supply-side steps for perishables matter as much as policy rates.
• The rural gap. Rural inflation (6.08%) and rural food inflation (8.06%) are both above the urban figures (4.88% and 7.18%).
• Better measurement. More services (50 in place of 40), online markets and weights from HCES 2023-24 bring the index closer to how India spends today, and that is also why the old and new numbers do not line up.
• Policy room. Inflation is inside the band but has risen every month of 2026; the MPC’s next meeting, scheduled for 2 to 4 December 2026, follows its own Q3 projection of 6.0 per cent.

UPSC Relevance

GS Paper 3: Indian economy, issues of planning, mobilisation of resources, growth and development; inflation, its measurement and monetary policy.

Prelims: CPI base 2024=100; CFPI; COICOP 2018; HCES 2023-24; NSO; inflation target 4% ±2% to March 2031; Section 45ZA of the RBI Act, 1934.

Mains: food-led inflation and the limits of monetary policy; rural-urban inflation gaps; base revision and statistical comparability.

📌 Facts Corner, Knowledgepedia

Prelims, statement-ready facts:

• September 2026 CPI inflation: 5.54% (provisional), base 2024=100; rural 6.08%, urban 4.88%; released by MoSPI on 12 October 2026.
• Food (CFPI) inflation: 7.74% in September, up from 5.97% in August; rural 8.06%, urban 7.18%.
• August 2026 (final): 4.83%, revised from the provisional 4.82%.
• New series: base moved from 2012=100 to 2024=100; released 12 February 2026; inflation data from January 2026.
• Basket: 358 items (308 goods, 50 services), up from 299; weights from HCES 2023-24.
• Structure: 12 Divisions (COICOP 2018) in place of 6 Groups; 43 groups, 92 classes, 162 subclasses.
• Prices: 1,407 urban markets (including online) and 1,465 villages; weekly roster by the NSO’s Field Operations Division.
• Target: 4% with a ±2% band, renewed to March 2031 (Gazette S.O. 1580(E), 25 March 2026); Section 45ZA, RBI Act, 1934.
• Items: onion 108.09%, silver jewellery 87.80%, ginger 62.85%; potato -11.50%, tomato -8.62%.
• Next release: CPI for October 2026 is scheduled for 12 November 2026.

Prelims, the traps:

• Old and new series cannot be directly compared: MoSPI cites changes in basket, weights, market coverage and methodology.
• CFPI (7.74%) is food; the “Food and beverages” division (7.36%) is a different measure.
• 5.54% is inside the 2 to 6 per cent band: the target is not breached.
• Failure test: average inflation above 6% or below 2% for three consecutive quarters.
• On a failure, the RBI reports the reasons and remedial steps to the Centre under Section 45ZN of the RBI Act; first done in November 2022.
• Silver jewellery inflation eased (106.81% to 87.80%) while onion rose (48.78% to 108.09%): read item movements, not levels.

Mains, arguments and keywords:

• Food-led inflation (onion, ginger, garlic) responds slowly to the repo rate; supply-side steps for perishables matter.
• A newer basket (HCES 2023-24, 50 services, online markets) measures today’s spending better but breaks comparability.
• Keywords: base revision; COICOP 2018; CFPI; inflation targeting; tolerance band; calibrated tightening; rural-urban gap.

Interview, be ready for:

• “Why not compare today’s inflation with 2024’s?” Explain the new base, basket and weights, and MoSPI’s caution on direct comparison.

Revision Flowchart

Sources:

• PIB (MoSPI), Consumer Price Index on base 2024=100 for September 2026, 12 October 2026
• PIB (MoSPI), Lok Sabha reply on the CPI base revision, 29 July 2026
• PIB (MoSPI), first CPI release on base 2024=100, 12 February 2026
• PIB (MoSPI), CPI for August 2026, 14 September 2026
• RBI, Monetary Policy Statement, 7 October 2026
• RBI speech on inflation targeting, 5 May 2026
• The Hindu, 13 October 2026 (T.C.A. Sharad Raghavan)

Source: CPI Inflation September 2026: 5.54% on the 2024 Base Series — Ujiyari.com | Free UPSC & State PCS Current Affairs