Wholesale price index-based inflation in November is likely to have edged up, while core inflation during the month is seen decelerating due to a base effect.
Inflation probably picked up during the month as a weak currency pushed up the price of imported fuel, adding to the challenges facing a central bank torn between fighting rising prices and an economic slowdown, Reuters reported.
A Reuters poll of 32 economists projected the price rise at 7.60 percent on year, compared with 7.45 percent in October. The poll forecasts ranged from 7.12 percent to 8.10 percent.
However, core inflation rate, which the RBI holds as key to its rate decisions, is likely to have declined, said ICICI Securities.
"The recent pharmaceutical policy put a cap on prices of 348 drugs and will have an impact on the price of drugs to the extent of 15-20%, on average. The prices of metals have also declined due to global influence. On the contrary, there is a marginal increase in the prices of beverages and textile products. In view of this and due to the base effect, we estimate the core inflation at 4.45% in November 2012," the brokerage said in a recent note.
Wilting economic growth has prompted calls from the government and business leaders for the Reserve Bank of India to cut interest rates, but it has so far rejected them, saying prices are still rising too fast to ease policy.
"The WPI inflation likely increased slightly despite a favourable base. (The) decline in the Indian rupee over the month more than offset the fall in global commodity prices, and may have supported imported inflationary pressures," said Abhishek Upadhyay, an economist at Axis Bank.
Primary articles like food and fuel make up over a third of the wholesale price index, and their high cost has kept inflation stubbornly strong. The data will be released on Friday.
Renewed weakness in the rupee added to the pressure, with its almost 1 percent drop last month pushing costs of imports, mainly crude oil, higher. Compared with a year earlier, the rupee was down about 4 percent against the dollar.
The economy extended its slump into the three months to September, growing an annual 5.3 percent, and is headed for its weakest full-year growth in a decade.
In an unexpected move, RBI Governor Duvvuri Subbarao gave fairly explicit policy guidance at the October meeting, saying the RBI might ease policy in January to March, the final quarter of the fiscal year, when it expects inflationary pressure to ease.
"Even if inflation has started showing signs of moderation, it is still way above the RBI's comfort level and I don't see any rate action in December's policy review," said Rupa Rege Nitsure, at Bank of Baroda.
The RBI has left the repo rate on hold at 8 percent since April this year but slashed the cash reserve ratio to 4.25 percent, its lowest since 1976. The move was expected to inject 175 billion rupees into the banking system to pre-empt a potential tightening of liquidity.
A headline inflation rate of 5 percent is commonly perceived as the RBI's comfort level and it has stayed above 7 percent through this year, although lower than the 9.5 percent it averaged in the previous two years.
With inputs from Reuters