Home/Compare Markets/2026 Brazilian Presidential Election ✓ 99% matchpolitics2026 2026 Brazilian Presidential Election: Polymarket vs Kalshi 18 outcomes|2 platforms Trade on Polymarket Details resolves by Oct 4, 2026 Trade on Kalshi Details resolves by Oct 25, 2026 ⛓️ Also trading on Predict.fun Compare the odds on another venue Open on Predict.fun → Total Volume $119.22M Liquidity $10.68M Avg Spread 0.5pp Max Spread 4.1pp Who will win Brazil's 2026 election — and why do the two markets disagree? Analysis written July 1, 2026 odds & tables update live Brazil’s 2026 presidential race is one of the most-searched cross-platform questions we track — the same field of candidates priced by both Polymarket and Kalshi. Here’s who’s favored, how the market lines up against the polls, and why the two platforms don’t quite agree on the front-runner.

Where the race stands (mid-2026). The first round is October 4, 2026. Polls put incumbent Lula first at roughly 42% (Workers’ Party, seeking a fourth term at 80), with Flávio Bolsonaro around the low-30s — the Liberal Party candidate carrying his family’s far-right movement after Jair Bolsonaro was barred from running over the 2022 coup plot.

A runoff (if no one clears 50% in round one) would be tighter than the first-round lead suggests. The candidates — and where the two markets differ Luiz Inácio Lula da Silva is the favorite on both platforms, but they disagree on how solid: 64% on Polymarket versus 62% on Kalshi.

The live board: Candidate Polymarket Kalshi Luiz Inácio Lula da Silva 64% 62% Flávio Bolsonaro 24% 28% Renan Santos 9% 9% Jair Bolsonaro 1% 4% Ronaldo Caiado 2% 2% Ciro Gomes — 1% Live market-implied probability to win Brazil's 2026 presidential election — top 6. Markets vs polls, and the contract quirks Note the market prices Luiz Inácio Lula da Silva higher than the ~42% first-round polling — because the contract pays on winning the election, including the runoff, where the incumbent is favored.

Two quirks to know: the platforms list different resolution dates (Polymarket settles at the October 2026 election with an “Other” backstop if it’s not resolved by mid-2027; Kalshi’s window runs later — a settlement buffer, not a different election), and Kalshi still lists Jair Bolsonaro even though he’s ineligible — the market correctly prices him near zero.

Sources: AS/COA poll tracker Wikipedia: 2026 Brazil polling. Odds update live; the race context is as of July 1, 2026.



▸ Show full contract ladder & live odds (18 rungs)▾ Hide full contract ladder Cross-Platform Odds Comparison Outcome Polymarket Kalshi Spread Luiz Inácio Lula da Silva 64%—Buy 62%±0Buy 1.5pp spread Flávio Bolsonaro 24%—Buy 28%+1.0Buy 4.1pp spread Renan Santos 9%±0Buy 9%±0Buy 0.2pp spread Jair Bolsonaro 1%—Buy 4%+3.0Buy 3.0pp spread Ronaldo Caiado 2%±0Buy 2%±0Buy 0.1pp spread C Ciro Gomes 1%±0Buy Romeu Zema 1%±0Buy 1%±0Buy 0.0pp spread Michelle Bolsonaro 0%—Buy 0%±0Buy 0.0pp spread Camilo Santana 0%—Buy - - Tereza Cristina 0%±0Buy - - Geraldo Alckmin 0%—Buy - - Fernando Haddad 0%—Buy 0%±0Buy 0.1pp spread Tarcisio de Freitas 0%—Buy 0%±0Buy 0.1pp spread Aldo Rebelo 0%—Buy 0%±0Buy 0.1pp spread Ratinho Júnior 0%—Buy 0%±0Buy 0.1pp spread Eduardo Bolsonaro 0%—Buy 0%±0Buy 0.1pp spread Eduardo Leite 0%—Buy - - Helder Barbalho 0%—Buy - - Arbitrage Opportunity 4.1pp spread Flávio Bolsonaro Buy YES 24%onPolymarket + Buy NO 72%onKalshi Cost: 96¢ per pair → pays $1 at resolution. Gross spread 4.1pp — before fees, and only at the top of what may be a thin book; both platforms charge trade fees and capital locks up until the market resolves, so the executable edge is usually smaller (often zero).

View all arbs Cross-platform spread history When Polymarket and Kalshi priced the same outcome far enough apart to buy both sides for under $1, we recorded it. Reconstructed from our price history — these are gross spreads.

Flávio

Bolsonaroopen now Held up to 17.3d straight buy YES on Polymarket, NO on Kalshi

2026-03-09→2026-07-30 10.8pp peak ~4.3pp typ.

Luiz Inácio

Lula da Silva Held up to 9.3d straight buy YES on Polymarket, NO on Kalshi

2026-03-07→2026-07-29 10.5pp peak ~3.5pp typ.

Jair Bolsonaro

Held up to 6.7d straight buy YES on Polymarket, NO on Kalshi

2026-03-08→2026-07-12 7.4pp peak ~4.9pp typ.

Renan Santos

Held up to 2.7d straight buy YES on Kalshi, NO on Polymarket

2026-03-07→2026-07-25 6.6pp peak ~2.7pp typ.

Ronaldo Caiado

Flickered in and out 1× buy YES on Kalshi, NO on Polymarket

2026-03-31→2026-03-31 5.9pp peak ~5.9pp typ. Gross spreads before fees.



Both platforms charge trade fees, thin books cap fillable size, and capital locks up until the market resolves — the executable edge is smaller, and often zero. A persistent wide spread usually reflects genuine cross-platform disagreement, not free money.

Biggest Trades Across Platforms

All whale trades → pobuy mustbethewateron Tereza Cristina 100¢$2.7KJul 10 pobuy WilliamKyron Eduardo Bolsonaro 100¢$2.0KMar 31 posell WilliamKyron Eduardo Bolsonaro 100¢$2.0KApr 3 pobuy nath3tobinon Ronaldo Caiado 98¢$1.1KApr 1 posell Keeley76on Ronaldo Caiado 97¢$1.1KApr 2 pobuy Keeley76on Ronaldo Caiado 98¢$1.0KApr 2 About This Market Background, methodology, and platform context Compare 2026 Brazilian Presidential Election prediction market odds side by side across Polymarket, Kalshi. Platforms show similar odds, with an average spread of just 0.5pp. Close agreement often signals strong market consensus.

With $119.22M in combined trading volume across 18 outcomes, this is one of the most actively traded cross-platform prediction markets. Descriptions normalized for comparison (outcome names replaced with [OUTCOME]) Highlight differences Polymarket A presidential election is scheduled to take place in Brazil on October 4, 2026. This market will resolve according to the listed candidate that wins this election.

This market includes any potential second round. If the result of this election isn't known by June 30, 2027, 11:59 PM ET, the market will resolve to "Other". This market will resolve based on the result of the election as indicated by a consensus of credible reporting.

If there is ambiguity, this market will resolve based solely on the official results as reported by the Brazilian government, specifically the Superior Electoral Court (Tribunal Superior Eleitoral, TSE) (e.g., https://dadosabertos.tse.jus.br/).

Kalshi

If [OUTCOME] has won the 2026 Brazilian presidential election, then the market resolves to Yes. AI Analysis Low Match (32%) Different platforms may use different resolution criteria, data sources, and settlement timelines.

Polymarket

Volume $116.51M Liquidity $9.26M Trade Details Kalshi Volume $2.70M Liquidity $1.42M Trade Details Spread Analysis Flávio Bolsonaro Kalshi higher than Polymarket 4.1pp 28% vs 24% Jair Bolsonaro Kalshi higher than Polymarket 3.0pp 4% vs 1% Markets matched across platforms with 99% confidence. This match has not been human-verified. Odds and spreads update every 30 minutes.

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