The breach of the Reserve Bank of India’s 6% inflation ceiling has strengthened the case for further monetary tightening, but has not prompted most economists to call for an aggressive rate increase. Despite October retail inflation rising to 6.09%, above the upper end of the RBI’s 2–6% tolerance band, the broad expectation is for a 25-basis-point repo-rate hike in December rather than a 50-basis-point increase.

The difference in assessments reflects the nature of the inflation shock. Food prices remain the principal driver, while the sequential increase in headline inflation moderated to 0.51% in October from 0.69% in September. However, the rise in core inflation and the widening spread of price pressures suggest that the RBI cannot treat the increase as entirely temporary.

Barclays, ANZ, HDFC Bank and IDFC FIRST Bank expect a 25-basis-point increase in December, generally followed by another quarter-point hike in February. SBI Research has also shifted towards a 25-basis-point December increase from its earlier expectation of 50 basis points, while assigning a 50% probability to the terminal repo rate being lowered to 5.75% from its 6% estimate. Emkay remains relatively more hawkish, expecting another 50 basis points of tightening, split between December and February.

The divergence is less about whether the RBI needs to tighten further and more about how quickly it should do so.

Food Inflation Raises Concern
October’s inflation increase was largely driven by food prices. Barclays estimates that food and beverages accounted for 42 basis points, or 78%, of the 54-basis-point rise in headline inflation between September and October. While food inflation accelerated to 8.5%, its sequential momentum slowed to 0.9% from 1.25% in September. The moderation in vegetable and edible oil prices provides some evidence that the immediate pace of food-price increases may be easing.

However, the improvement is uneven. Rising cereal prices, lower reservoir levels and weak initial rabi sowing remain risks. HDFC Bank flags higher prices across cereals, milk, pulses and vegetables, while ANZ points to a broader spread of inflation. It notes that 83% of CPI items recorded higher annual inflation in October, compared with 80% in September.

Core inflation is another source of concern. It rose to 4.5% from 4.3% in September, while core inflation excluding precious metals increased to 3.8% from 3.2%. ANZ estimates that the annualised momentum in refined core inflation has reached 4.7%, suggesting that underlying price pressures are firmer than the headline annual rate alone indicates.

This is where economists differ on the policy response. Barclays expects FY27 core inflation to average 4.2%, below the RBI’s 4.4% projection, arguing that second-round effects and demand-side pressures remain relatively contained. It also expects only moderate pass-through from elevated wholesale price inflation to consumer prices. ANZ, by contrast, sees pipeline cost pressures feeding more visibly into retail prices, with double-digit WPI and producer-price inflation raising the risk of further pass-through.

Currency and Oil Provides Room
The improvement in the external environment has become an important reason for economists to favour gradual tightening. Lower crude prices and a more stable rupee have reduced the immediate risk of imported inflation and eased pressure on the RBI to use interest rates to defend the currency.

SBI Research has revised its December call to 25 basis points, citing improved rupee stability, easing liquidity pressures, a revival in foreign portfolio inflows and an 11% decline in crude prices following the US midterm elections. It estimates that rupee appreciation could reduce imported inflation by 10–15 basis points. The research team sees the terminal repo rate at 6%, with a 50% probability of a lower terminal rate of 5.75%, and does not consider another February hike advisable.

IDFC FIRST Bank also favours a calibrated approach, retaining its expectation of 25-basis-point hikes in December and February, with a possible third increase if conditions warrant. It argues that much of the inflation shock is supply-side driven and that the economy is not showing signs of overheating. Stability in the rupee following the RBI’s foreign exchange measures provides further room to avoid front-loading rate increases.

Emkay takes a different view. It expects another 50 basis points of tightening, arguing that deficient monsoon conditions, El Niño risks and higher commodity costs could sustain food inflation and generate second-round effects. It also expects real rates to remain negative even after the anticipated increases.

The policy debate is therefore shifting from the October inflation breach to the persistence of price pressures. The RBI will need to determine whether higher food and input costs are feeding into broader pricing behaviour, inflation expectations and wages, or whether the recent acceleration will ease as sequential food-price momentum moderates.

The growth-inflation trade-off will also matter, particularly with the next GDP data due before the December policy review. A 50-basis-point increase could risk imposing excessive restraint if the shock remains largely supply-driven. But a slower response could allow second-round effects to become embedded if food and input-cost pressures persist.

For now, the balance of economist expectations favours a 25-basis-point increase in December. The more important question is whether that move marks the start of a shallow hiking cycle towards 6%, or whether persistent food and core inflation eventually requires a higher terminal rate. The rupee, crude prices and evidence of broader price pass-through will determine which path gains traction.