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
Judges will rule if Brexit talks can start without consent from MPs and without formal input from legislatures in Wales, NI and Scotland.
Another cold night across much of England and Wales. Milder conditions pushing into the west of Ireland and Scotland.
US officials have denied that the US military is coordinating with Russia in Syria.