YouGov polling shows two-party preferred support for the LNP opposition is up two per cent to 56 per cent, from the previous poll in October.
This compares to 44 per cent for the government, after 1092 voters were surveyed between April 9 and April 17.
The opposition has also increased its primary vote to 44 per cent, compared with 27 per cent for the Miles government, the poll published by The Courier-Mail on Friday shows.
That represents a decline of six percentage points in Labor's primary vote since October and a nearly 13 per cent drop-off since Labor's 2020 election win under former premier Annastacia Palaszczuk.
Current projections point to the LNP comfortably winning more than the 13 seats required to form a majority government, when the election is held on October 26.
The LNP under leader David Crisafulli has already netted an extra seat this year following an enormous swing towards the party in two by-elections in March.
The Labor government lost the formerly safe seat of Ipswich West to Darren Zanow, who attracted 39.6 per cent of the primary vote with a 17.8 per cent swing.
Labor's margin for Ipswich West following the 2020 election was 14.3 per cent.
The government also suffered a huge swing in Inala, previously Labor's safest seat in the state.
Labor's Margie Nightingale held onto Ms Palaszczuk's former seat with 37 per cent of the primary vote, but not without a 21.5 per cent swing to the LNP.
Cost of living, health and crime are the major issues for Queenslanders ahead of the election.
The Queensland Greens and Pauline Hanson's One Nation have also increased their primary vote by two percentage points each to 15 per cent and 10 per cent, respectively, the YouGov polling showed.