Conservative support has stagnated and the party will fail to form a majority government on current performance, pollsters have predicted.
As the year draws to a close, Labour is on 33%, with the Conservatives three points behind, while Ukip is on 21% and the Liberal Democrats 10%, according to Survation research for the Daily Mirror.
Although the two major parties are just a few points apart, the Tories have not made the progress needed to secure an outright victory, the polling firm said.
Survation chief executive Damian Lyons Lowe said: "To the casual observer, these figures might suggest a close race for the 2015 general election between the Conservatives and the Labour party.
"However, the Conservative party need to be ahead of Labour by a considerable margin to even begin to win seats needed to gain an overall majority. Today we looked back at our polling for the Daily Mirror and found that in September 2012 - over two years ago - the Conservative party were on exactly the same vote share as today - 30%.
"In short, the Conservatives, with just five months left of this current, fixed-term parliament are yet to make make the progress needed to form a majority government."
:: Survation interviewed 1,009 adults online between December 18-19