Fine Gael, Fianna Fáil and Labour have all made small gains in support according to the latest Sunday Business Post/Red C poll.
Sinn Féin and Independents have lost support.
The poll, which was carried out in the week leading up to Thursday 22 November, shows Fine Gael is up one point to 34%.
Fianna Fáil is up two points to 27%.
Sinn Féin is down two points to 13%, while Labour is on 6% - up one point.
Independents are down two points to 10%, while the Independent Alliance is on 5% - up 1 point.
The Green Party is down one point to 3%, the Social Democrats are unchanged on 2%, while Solidarity-People Before Profit and Renua are each on 0%, unchanged from the previous poll published on 21 October.
The figures take into account the days following a promise made by Taoiseach Leo Varadkar during his Ard Fheis speech to increase the point at which people pay the top rate of tax to €50,000 for a single person, or €100,000 for a couple over the next five budgets.
The pledge was criticised by Fianna Fáil which said its preference was for more public spending rather than tax cuts.
The poll involved telephone interviews with 1,000 adults and has a margin of error of plus or minus 3%.