Onion prices up 116%: October CPI inflation 6.09%, Tamil Nadu highest

India's retail inflation rose to 6.09% in October 2026 from 5.54% in September, crossing the Reserve Bank of India's upper tolerance limit of 6%, according to provisional Consumer Price Index (CPI) data released by the Ministry of Statistics and Programme Implementation (MoSPI) on Thursday, 12 November 2026. Food prices drove the rise: food inflation climbed to 8.94%, and onion prices were 116.22% higher than a year earlier. Among states with a population of more than 50 lakh, Tamil Nadu recorded the highest inflation, at 7.29%.

The RBI is required to keep retail inflation within 2% to 6%, with 4% as the target. A reading above 6% does not trigger any automatic action, but it puts pressure on the Monetary Policy Committee, which sets the repo rate, ahead of its December meeting. Reports after the release said the chance of a further rate rise had increased. A higher repo rate usually feeds through to higher loan rates for homes, cars and businesses.

The detail behind the headline matters as much as the number. Food made up most of the increase, and within food, one item stood out: onion. Onion prices more than doubled in a year, and the rate of increase rose again in October. Onion is used in almost every Indian kitchen, so its price is felt quickly by households. With food prices leading the rise, rural inflation, at 6.63%, was well above urban inflation, at 5.41%.

The state picture shows that inflation is not the same everywhere. Tamil Nadu's 7.29% was the highest among states with more than 50 lakh people, more than a full point above the national figure. In September, Tamil Nadu had also topped the list, at 6.81%. Kerala recorded rural inflation of 7.01% and urban inflation of 5.58% in October.

Peepals calculation: Headline inflation rose 0.55 percentage points in one month (6.09 − 5.54), while food inflation rose 1.20 points (8.94 − 7.74), more than twice as fast. An onion price rise of 116.22% means onions cost about 2.16 times what they did in October 2025 (1 + 1.1622). Tamil Nadu's inflation rose 0.48 points from September (7.29 − 6.81), and its October rate was 1.20 points above the all-India figure (7.29 − 6.09). Our calculation from the reported figures.

Short-term: Households, especially in rural areas, face higher food bills, led by onions. Borrowers will watch the RBI's December policy decision, as reports after the data said the case for a rate rise had grown.

Long-term: If food prices stay high, inflation could remain above the RBI's band for longer, keeping interest rates higher and squeezing spending on other goods. The new CPI series, with 2024 as its base, will be the yardstick for these decisions.

Who is affected: Households in every state, more so in rural areas and in Tamil Nadu; borrowers with floating-rate loans; farmers and traders in onion and other vegetables; and businesses that depend on consumer spending.

What to watch next: The RBI Monetary Policy Committee's December 2026 meeting, which will be the first rate decision after inflation crossed the 6% limit.

Questions and Answers