"The general elections for president, vice president, senators, deputies and representatives... Will be held Sunday October 12 this year," the tribunal president, Wilma Velasco, told reporters at a press conference.
Velasco said a potential presidential runoff -- to be held if no one candidate obtains a majority of votes -- would be December 7.
The new term is set to begin on January 22, 2015 and run for five years.
The latest polls put Morales in the lead to win the presidential vote, with opposition divided among several possible candidates.
Another top opposition candidate is the influential governor of the eastern region of Santa Cruz, Ruben Costas.