A Eurosceptic, anti-immigration right-winger and his left-leaning rival are neck and neck in Austria's presidential election a day after polls closed, and officials are now counting absentee ballots to determine who will win.

Direct votes Sunday gave right-winger Norbert Hofer 51.9 percent to 48.1 percent for Alexander Van der Bellen, a Greens politician running as an independent. But final projections that include still-to-be-counted absentee ballots put each at 50 percent with Van der Bellen narrowly ahead.

About 700,000 absentee ballots — close to a sixth of total votes cast — are slated to be counted by Monday evening for a final tally.

Whoever wins, Sunday's voting has revealed a profound split over which direction the nation should now take, particularly over migration and the future of the European Union.