The ONS estimate the Budget will add 0.38 percentage points to the 1-month Consumer Price Index (CPI) rate between April and October 2012.
However, as the impact of the Budget last year was similar (0.21 percentage points), only 0.17 points will be added to the 12-month rate over the same period.
CPI measures the changes from month to month in the cost of a representative 'basket' of goods and services bought by consumers within the UK.
More top news
Weekend weather starts wet for some
Manchester United manager Louis van Gaal says Ryan Giggs will almost certainly succeed him at Old Trafford.
David Cameron has apologised for experiencing "brain fade" after he forgot which football team he supports.