The Berlin Election 2026 decides which party wins the most seats in the Abgeordnetenhaus, Germany's capital-city parliament. The board has consolidated around one answer: Die Linke pulled clear of the CDU through the second half of August, and the separate Berlin mayor contract now prices Die Linke's Elif Eralp as the heavy favorite to run the city. Eight parties trade across Kalshi and Polymarket on roughly $3.5M in volume ahead of the September 20, 2026 vote.
The Berlin Election 2026 is a Land election: voters in the German capital choose the members of the Abgeordnetenhaus, the city-state parliament that governs Berlin like a federal state. The chamber runs to at least 130 seats and 66 are needed for a majority. This market does not ask who forms the next governing coalition, a separate question priced on the next Governing Mayor of Berlin market. It asks one cleaner thing, which single party finishes first in seats. Eight parties are priced across Kalshi and Polymarket on roughly $3.5M in cumulative volume, and over the second half of August the board stopped treating this as a two-horse race.
Die Linke, The Left, is the chalk and the margin is growing. The party finished fourth in the February 2023 repeat election at 12.2% and 22 seats, and it climbed to the front of the Berlin field through 2026 on the housing issue. The Infratest dimap BerlinTrend conducted June 25-29, 2026 put Die Linke first at 20%, with 30% of respondents naming rents and housing as the most important topic in the city and Die Linke leading every party on problem-solving trust at 18% against the CDU's 11%. Elif Eralp is its lead candidate.
The move since mid-August is the story on this board. As of August 31, 2026 Die Linke trades at 59.5c and the CDU at 29c, a gap of more than 30c on a pair that sat at 41c and 34c two weeks earlier. Kalshi and Polymarket are a single cent apart on Die Linke at 60c and 59c, and agree on the CDU to the cent. The neighboring contract says the same thing louder: the Berlin mayor board has Eralp at 81c to become the next Governing Mayor, with Stefan Evers a distant second at 18c. Two separate questions, one direction.
That is a more committed read than the state polling supports. Two mid-August 2026 surveys, one fielded August 7-13 and an INSA poll fielded August 15-16, both put the CDU narrowly in front at 20% to Die Linke's 19%, inside the margin of error. The board went the other way anyway. Traders are pricing the trend line and the CDU's leadership problem rather than the newest headline number, and the distance between the polling and the price is now the most interesting feature of this market.
The CDU won the 2023 repeat election at 28.2% and 52 seats and has governed Berlin in a grand coalition with the SPD ever since. It now polls about eight points below that result. The proximate cause is a leadership change. Governing Mayor Kai Wegner stepped down as the CDU's lead candidate on July 10, 2026 after sustained criticism of his handling of the January 3, 2026 attack on the city's power grid, and Finance Senator Stefan Evers took the top spot. Wegner stayed on as a constituency candidate in Spandau and ruled out serving in the next government.
That is the largest structural change on this board since it opened, and it is what moved the CDU from front-runner to chaser. The party has drifted rather than collapsed: it still holds second place by a wide margin over the AfD, and it is the one line where the two platforms show no gap at all. A first-place CDU finish still would not lock the mayoralty, because Berlin's coalition arithmetic has historically favored a left-leaning bloc, but the seat-count question this contract resolves on is the one an incumbent governing party has the clearest path to win. The incumbent CDU-SPD coalition polls short of a majority.
Below the top two the compression has been severe. The August 7-13, 2026 survey had the AfD at 17%, the Grüne at 16% and the SPD at 15%, all within five points of the CDU's 20%, and yet as of August 31, 2026 the board has all three in single digits, with the AfD at 9.5c, the Grüne at 4.5c and the SPD at 4c. Each gave up ground as Die Linke gained. That gap between polling share and contract price is the contract structure doing the work: finishing first in seats out of a five-party scrum is a far harder ask than polling third.
The AfD line is still the most traded single contract on the board, carrying roughly $2.4M of the $3.5M in cumulative volume, close to seven of every ten dollars traded here. That reflects national interest in the party's eastern momentum more than a Berlin ceiling that has historically lagged its results in the eastern states. Kristin Brinker leads its list. The Grüne, running Werner Graf and Bettina Jarasch, took 18.4% and 34 seats in 2023 and are the party Die Linke has taken the most ground from. The SPD matched that 18.4% and 34 seats in 2023 and now runs Steffen Krach, and it sits at the bottom of the five-party cluster, a striking fall for a party that held the mayoralty for two decades. Below them the BSW polls at 3%, under the five-point threshold, while the FDP is a long shot that needs a polling shock to reach first place. The Freie Wähler line is priced on Polymarket only, and Polymarket is where the deeper money on the small-party contracts sits.
The Abgeordnetenhaus election is scheduled for September 20, 2026, and the market resolves to the party or coalition that wins the greatest number of seats in that vote. The source of truth is the official result reported by the Berlin election office, the Landeswahlleiter Berlin. If two parties tie for the most seats, the contract resolves in favor of the one whose abbreviation comes first alphabetically. If the vote does not occur by December 31, 2026, the market resolves to Other.
Germany's state calendar and Europe's September votes trade alongside this board. The Saxony-Anhalt 2026 election odds run the same most-seats structure in an eastern state where the AfD question is central. The Sweden Parliamentary Election 2026 odds resolve on a similar basis on September 13, 2026, one week before Berlin votes, and the companion Next Prime Minister of Sweden market prices who actually takes office out of that result, the same split this Berlin board has with its mayoral contract. Further out, the French Presidential Election 2027 odds carry the largest European political board on the platform. Browse the full slate on the politics prediction markets hub.
Resolves to the political party or coalition that wins the greatest number of seats in the Abgeordnetenhaus of Berlin in the state election scheduled for September 20, 2026. The source of truth is the official result reported by the Berlin election office, the Landeswahlleiter Berlin. Each party contract pays $1 per share if that party finishes first in seats; all other party contracts resolve to $0. In the event of a tie for the most seats, the market resolves in favor of the party or coalition whose listed abbreviation comes first in alphabetical order. If voting for the Abgeordnetenhaus does not occur by December 31, 2026, the market resolves to Other.
As of August 31, 2026, Die Linke leads the board at 59.5c, the CDU is second at 29c, the AfD is at 9.5c, the Grüne at 4.5c and the SPD at 4c. Die Linke has gained more than 18c since mid-August while every other party on the board has given ground.
It resolves after the Abgeordnetenhaus election scheduled for September 20, 2026, based on the official result from the Landeswahlleiter Berlin. If the vote does not occur by December 31, 2026, the market resolves to Other.
The market trades on both Kalshi and Polymarket, with roughly $3.5M in cumulative volume across the two platforms. The AfD contract alone accounts for about $2.4M of that turnover, the heaviest single line on the board by a wide margin.
Die Linke, led by Elif Eralp, is the favorite to win the most seats as of August 31, 2026, and the separate Berlin mayor contract has Eralp at 81c to run the city. Die Linke finished fourth in 2023 at 12.2% and 22 seats, so this is a four-place climb.
Watch whether late Berlin polling catches up to the board, because mid-August surveys still had the CDU a point ahead at 20% to 19% while the price moved hard toward Die Linke. The September 20, 2026 vote is the resolution trigger.