Consumer prices rose 2.9% from a year earlier last month after climbing 3.0% in January. Compared to the previous month, prices increased 0.1% in February.
The February figures suggested the economy might escape any upward spiral of inflation due to the new tax and more expensive fuel, which are part of a government drive to cut a big budget deficit caused by low oil prices.
A major reason for this is weakness of the economy, as consumers are not spending heavily to push up prices while many companies are discounting to try to keep market share.
Food and beverage prices jumped 6.5% from a year earlier in February while restaurants and hotels gained 6.8%; both sectors were affected by the tax.
Transport costs, boosted by more expensive fuel, increased 10.1%. But the household and utilities sector rose only 1.3%.
The government lifted electricity prices in January but the real estate market is slumping because of the weak economy, helping to restrain overall inflation.
Prices of clothing and footwear plunged 8.0%, apparently the result of heavy discounting by retailers.
In January, the statistics agency changed the base year for the consumer price index to 2013 from 2007 and adjusted the basket of goods and services, giving housing and utilities a much bigger weighting, for example.
This made direct comparisons with last year’s inflation rates difficult.
But this year’s rates have clearly risen sharply; annual inflation was just 0.4% in December, according to previously released data using the old basket.
Private economists estimated that if the statistics agency had continued to use the old consumer basket in January, annual inflation could have been around 6%, hitting its highest level since 2010.
