The Brazil 2026 first round market prices which candidate takes the most votes on October 4, 2026, and the ballot is now certified: registration closed August 16 and the campaign is two weeks old. Eight names trade across roughly $290K in cumulative volume, and Lula led all eight national first-round polls fielded in August against a Flavio Bolsonaro candidacy that has absorbed most of the right. The live board above carries current prices; the runoff, if needed, follows October 25, 2026.
Brazil votes on October 4, 2026, the ballot was certified after registration closed on August 16, and two weeks of live campaigning have not shaken the first-round market off its read: President Luiz Inacio Lula da Silva takes the most round-one votes. Lula formalized his fourth-term bid at the Workers' Party convention in Sao Paulo on August 2, 2026, with Geraldo Alckmin again on the ticket. Senator Flavio Bolsonaro was confirmed as the Liberal Party candidate on July 25, 2026, with federal deputy Alfredo Gaspar of Alagoas as his running mate. Most of the certified ballot is micro-party candidacies that no platform prices; eight names carry a price here, across roughly $290K in cumulative volume. The live board above carries the current price on every one.
Lula led every national first-round poll fielded in August 2026, and there were eight of them. Vox Brasil had him at 37.1% on August 25 to 27, Datafolha at 39% on August 18 to 20, Nexus at 39% on August 28 to 30, and AtlasIntel at 43.4% on a 5,014-respondent sample fielded August 25 to 30. Flavio Bolsonaro ran between 33% and 37% across the same set. No other candidate topped single digits in any of them.
The structure of the contest does the rest of the work. This market pays on finishing first, not on clearing 50%, and a four-decade political brand polling near 40% against a right wing that still splits several ways is a strong plurality position even with roughly half the country disapproving of the government. The board has firmed on exactly that logic since mid-August.
The runoff is the part that moved, and it moved against the favorite. In mid-August, Quaest had a second round at Lula 43% to Flavio Bolsonaro 40%. By the end of the month the spread had closed to a single point in three separate reads: Nexus 46% to 45% on August 28 to 30, Nexus 46% to 45% a week before that, and PoderData 45% to 44% on August 23 to 26. Vox Brasil, fielded August 25 to 27, put Flavio Bolsonaro ahead 45.1% to 44.5%, the first second-round lead of the cycle for the challenger. AtlasIntel is the outlier holding Lula at 47.1% to 42.6%. Both readings hold at once: Lula is heavy chalk to lead on October 4 and no better than a coin flip to still hold the office after October 25. This board pays on the first half of that only, which is why it has been firming while the presidency itself got harder to price.
Flavio Bolsonaro, the senator from Rio de Janeiro and son of former president Jair Bolsonaro, declared in December 2025 and inherited the family's electoral machine. His father is serving a 27-year sentence for the 2022 coup plot and was moved to prison custody in January 2026, so the endorsement travels without the endorser. Sao Paulo governor Tarcisio de Freitas, long viewed as the right's strongest presidential option, chose a gubernatorial re-election run in January 2026 and backed Flavio instead. Flavio has climbed from the high 20s in early summer into a 33% to 37% band across the late-August field. That is a runoff number and a losing number for first place, which is how the board still treats him. His one registration scare, a Superior Electoral Court record that briefly showed him leaving the Liberal Party on August 12, was reversed within hours and attributed to misuse of the filing tool rather than a breach.
Two names joined the certified ballot that no platform prices: the author Augusto Cury on the Avante ticket and Pablo Marcal, the disruptor from the 2024 Sao Paulo mayoral race, running under the PRTB. Of the names that do trade, Renan Santos, co-founder of the Free Brazil Movement and the Missao party's first presidential candidate, polls in the low single digits nationally and several times that with voters aged 16 to 24, the one split on the board that does not match his price. Romeu Zema and Ronaldo Caiado, the center-right governors of Minas Gerais and Goias, ran between 1% and 5% all month, with Caiado the steadier of the two. Fernando Haddad, Lula's finance minister, is the understudy contract if the president exits the race late. Tarcisio stays listed even though his gubernatorial run legally bars him from the presidential ballot, and the Polymarket side of the board also carries Parana's Ratinho Junior.
The campaign is loud now. The first televised debate ran on August 23, 2026 in Sao Paulo, hosted by a Bandeirantes-led consortium with Estadao and Jovem Pan. Lula and Flavio Bolsonaro both skipped it, which left Zema and Santos the stage and the coverage without moving either of their prices. Three debates remain: September 14, September 27, and October 1, the last of them three days before the vote.
The market resolves on the first round of Brazil's presidential election, October 4, 2026, to the candidate who receives the most valid votes, per official results from the Superior Electoral Court (TSE). Winning round one and winning the presidency are different bets. A candidate takes the office outright only with more than 50% of valid votes; otherwise the top two advance to an October 25, 2026 runoff, which every late-August poll makes the base case. This board settles either way once the round-one count is official.
The first round is one leg of a larger Brazil 2026 complex. The Brazil first round qualification odds price each candidate's chance of reaching the October 25 runoff rather than leading it, and at roughly $563K that board is the deeper of the two; it is also the cleaner expression of a Flavio Bolsonaro view than backing him for first place. Elsewhere in the region, Venezuela Leadership 2026 odds carry roughly $101M in cumulative volume. At the longer-dated end of the calendar, the 2028 US Presidential Election market trades across roughly $761M. For the wider slate, browse politics prediction markets.
Resolves to the candidate who receives the most votes in the first round of Brazil's presidential election on October 4, 2026, based on official results from Brazil's Superior Electoral Court (TSE). Candidate registration closed on August 16, 2026, so the ballot is set. Each candidate contract pays $1 per share if that candidate finishes first in the round-one count; all other contracts resolve to $0. Winning the first round does not require a majority and does not by itself decide the presidency: if no candidate clears 50% of valid votes, the top two finishers advance to a runoff on October 25, 2026. If a listed candidate withdraws or is barred before the vote, that candidate's contract resolves No per platform rules.
As of August 31, 2026, Kalshi prices Luiz Inacio Lula da Silva at 91c to take the most first-round votes, up from 86c two weeks earlier, with Flavio Bolsonaro next at 12c. Renan Santos is the only other name above 2c, trading 4c on Kalshi.
On the first-round vote, October 4, 2026, using official results from Brazil's Superior Electoral Court. A runoff between the top two follows on October 25, 2026 if no one wins a majority of valid votes.
Kalshi lists a seven-candidate first-round ladder under its KXBRPRES1R series, and Polymarket carries individual first-round contracts for Renan Santos, Tarcisio de Freitas, and Ratinho Junior. The combined board runs roughly $290K in cumulative volume across the two platforms.
No. A candidate only wins the presidency in round one by taking more than 50% of valid votes, and no August 2026 poll had anyone close. The second round has tightened to a coin flip: Nexus had Lula 46% to Flavio Bolsonaro 45% on August 28 to 30, and Vox Brasil had Flavio Bolsonaro ahead 45.1% to 44.5% days earlier.
The September 14, September 27, and October 1 debates, which are the last mass-audience events before the vote, and the weekly runoff reads from Nexus, PoderData, Datafolha, and AtlasIntel that moved Lula's second-round lead from three points in mid-August to one point or less by August 30.