EC Chairman Itthiporn Boonprakong made the announcement without giving any explanation to the decision.
The EC has said the poll results would be announced about three hours after the polling stations closed at 5 p.m. on March 24.
So far, 92 percent of votes were counted on March 24 night, while the EC said 95 percent of the results would be unofficially unveiled on the same day.
The turnout of voter is 66 percent of more than 51 million eligible voters, according to Itthiporn. The EC has expected that at least 80 percent of eligible voters would cast their ballots.
Thailand held its first general election since the 2014 coup on March 24. In the election, voters are allowed to vote 350 members directly in the 500-seat lower house. The 250-seat Senate is appointed by the ruling government.
