Incumbent Dilma Rousseff faces Aécio Neves in a runoff vote after neither managed to secure 50% of the first round vote.
The candidates have different views about how to restart Brazil's faltering economy and the campaigning has revealed deep splits amongst the electorate.
Brazil's economy is the 7th largest in the world and James Lindsay from the US based think-tank the Council On Foreign Relations believes it's a crucial election.
IN: "The consequences are..."
OUT: "...class and region in particular."
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http://www.fsnradionews.com/feeds/1024BrazilVote.mp3