Scott Morrison's Liberal-National coalition is edging closer to a majority after Saturday's federal election.
As counting continued on Sunday night, the first batches of postal votes looks set to shore up the Sydney seat of Wentworth and Boothby in South Australia for the Liberals, taking the coalition's numbers to 75.
A win in the Tasmanian seat of Bass, where the Liberals' Bridget Archer leads Labor MP Ross Hart by 437 votes, could deliver Mr Morrison a majority in the lower house.
At 9pm on Sunday, independent MP for Wentworth Kerryn Phelps trailed the Liberals' Dave Sharma by 1751 votes, with 75 per cent counted.
Boothby MP Nicolle Flint has a 2183 vote lead over Labor's Nadia Clancy.
The Australian Electoral Commission also listed Chisholm and Macquarie as close.
Labor MP Susan Templeman leads her Liberal rival Sarah Richards by 312 votes in the NSW seat of Macquarie.
Liberal candidate for Chisholm Gladys Liu leads Labor's Jennifer Yang by 166 votes in Chisholm.
The final tally could end up 77 coalition, 68 Labor with six crossbenchers.
In the previous parliament the numbers were: Liberals 58, Nationals 16, Labor 69, Greens 1, Centre Alliance 1, Katter's Australian Party 1, independents 4.