According to the latest data from Belgrade, the coalition around incumbent President Alexander Vucic and the Serbian Progressive Party (SNS) will take over 50% in the national parliament.
Earlier, Vucic expressed confidence that his party would dominate the legislative body: "We will have an absolute majority in parliament with 127 seats."
Some 18 political blocs and parties are participating in the elections, and to enter parliament a party must pass the 3% threshold.
In addition to the Serbian Progressive Party, the coalition Serbia Against Violence and the Socialist Party of Serbia are expected to win seats in parliament, as well as parties of national minorities.
Alexander Vucic stressed that his goal was to continue the dialogue with the EU and to protect Serbia's territorial integrity.
"My task was to do everything in my power to secure an absolute majority in parliament," Vucic added.