Polymarket and Kalshi are closely aligned on a wide-open field: Barcelona leads both books (19% Polymarket, 20% Kalshi), with Arsenal, PSG, Bayern Munich and Real Madrid all bunched between 14-16% on either platform. This agreement reflects the genuinely flat post-draw market — after Arsenal and Barcelona emerged as joint favorites following the August 27 league-phase draw, bookmakers and both prediction markets have declined to anoint a clear favorite given the depth of five to six credible contenders.
Analysis written Sep 7, 2026 · prices checked Sep 9 · odds in the tables below are live
| Outcome |  Kalshi |  Polymarket | Spread | |
|---|---|---|---|---|
B Barcelona | 5.5pp spread | |||
A Arsenal | 0.5pp spread | |||
B Bayern Munich | 0.5pp spread | |||
P PSG | - | - | ||
 Real Madrid | 2.5pp spread | |||
P Paris Saint-Germain | - | - | ||
 Manchester City | 1.5pp spread | |||
L Liverpool | 1.5pp spread | |||
Manchester United | 0.3pp spread | |||
I Inter Milan | 0.3pp spread | |||
A Atlético Madrid | 0.3pp spread | |||
 Aston Villa | 0.9pp spread | |||
B Borussia Dortmund | 0.2pp spread | |||
C Como | 0.1pp spread | |||
B Bodoe/Glimt | - | - | ||
R Roma | 0.1pp spread | |||
 Napoli | 0.3pp spread | |||
 Sporting CP | 0.4pp spread | |||
V Villarreal | 0.5pp spread | |||
V VfB Stuttgart | 0.5pp spread | |||
R Real Betis | 0.6pp spread | |||
R RB Leipzig | 0.6pp spread | |||
L Lens | 0.7pp spread | |||
P Porto | 0.7pp spread | |||
F Fenerbahce | 0.8pp spread | |||
G Galatasaray | 0.8pp spread | |||
L Lille | 0.8pp spread | |||
S Slovan Bratislava | 0.9pp spread | |||
S Sabah Masazir | 0.9pp spread | |||
S Shakhtar Donetsk | 0.9pp spread | |||
F Feyenoord | 0.9pp spread | |||
S Slavia Prague | 0.9pp spread | |||
C Club Brugge | 0.9pp spread | |||
V Viking | 0.9pp spread | |||
P PSV Eindhoven | 0.9pp spread | |||
A AEK Athens | 0.9pp spread | |||
B Bodø/Glimt | - | - | ||
L LASK | 0.1pp spread |
PolymarketKalshiCost: 95¢ per pair → pays $1 at resolution. Gross spread 5.5pp — 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 arbsBackground, methodology, and platform context
Compare UEFA Champions League Winner 2027 prediction market odds side by side across Polymarket, Kalshi. Platforms show similar odds, with an average spread of just 0.8pp. Close agreement often signals strong market consensus. With $30.82M in combined trading volume across 38 outcomes, this is one of the most actively traded cross-platform prediction markets.
Descriptions normalized for comparison (outcome names replaced with [OUTCOME])
If [OUTCOME] is the 2026-27 Champions League winner, then the market resolves to Yes.
Kalshi is not affiliated, associated, authorized, endorsed by, or in any way officially connected with the Governing League. All trademarks, logos, and brand names are the property of their respective owners.
This market will resolve according to the team that wins the 2026-27 UEFA Champions League Championship. If at any point it becomes impossible for a listed team to win the 2026-27 UEFA Champions League Championship per the rules of UEFA Champions League (e.g., they are eliminated in the playoffs), the corresponding market will resolve to "No". If the 2026-27 UEFA Champions League season is cancelled, postponed after June 19, 2027, 11:59 PM ET or there is otherwise no winner declared within that timeframe, this market will resolve to "Other". The primary resolution source will be official information from UEFA Champions League; however, a consensus of credible reporting may also be used.
Different platforms may use different resolution criteria, data sources, and settlement timelines.
