The Government's planned package of spending cuts and tax hikes for the year ahead is due to be unveiled.
The Department of Finance confirmed the Budget adjustment for 2011 will be published after it was approved by the Cabinet.
The December 7 Budget is due to be one of the harshest in the state's history, with up to six billion euro in cuts expected.
Ministers have previously said no department will be safe, including social welfare, health and education.
The Health Service Executive has already called for up to 4,000 redundancies to cut its payroll, while it has emerged pensioners over 70 could face being means tested for household benefits.
Elsewhere violence broke out outside the Department of Finance on Wednesday after a mass student demonstration over possible Government plans to double third-level registration fees from 1,500 euro to 3,000 euro.
The planned Budget adjustment will be released as the Government moves the writ for a long-awaited by-election in Donegal South West after bowing to unprecedented pressure from the courts.