Marathon Bet has the lowest Champions League margins in our record
Published 6 October 2026. Daily match-odds snapshots since March 2026.
Marathon Bet has the lowest average Champions League overround in The Best Betting Odds record among UK bookmakers, sitting at 103.7% from 608 daily match-odds snapshots since tracking started in March 2026. A lower overround is better for the bettor because it means the bookmaker takes a smaller theoretical cut, leaving more value for the player. Across the tracked market, Coral follows with an overround of 105.7%, while other operators range upward to the Betfair Exchange at 115.2%, creating a gap of 11.5 percentage points from lowest to highest in this table.
While Marathon Bet shows the lowest margins in our data, keep in mind that prices move and odds fluctuate constantly across all platforms. During the tracked period, Marathon Bet offered the best price in 2% of its 608 snapshots, compared to Coral at 20% across 627 snapshots and Smarkets at 17% across 578 snapshots. Other tracked UK bookmakers include Ladbrokes at 106.4% overround (6% best price), Unibet at 106.7% overround (4% best price), and various others scaling up through Betway, BoyleSports, and LeoVegas.
| Rank | Bookmaker | Avg overround | Best-price share | Snapshots |
|---|---|---|---|---|
| 1 | Marathon Bet | 103.7% | 2.0% | 608 |
| 2 | Coral | 105.7% | 20.0% | 627 |
| 3 | Smarkets | 106.2% | 17.0% | 578 |
| 4 | Ladbrokes | 106.4% | 6.0% | 523 |
| 5 | Unibet | 106.7% | 4.0% | 1,160 |
| 6 | Grosvenor Sport | 106.8% | 7.0% | 588 |
| 7 | Bet Victor | 106.9% | 2.0% | 380 |
| 8 | Paddy Power | 107.0% | 3.0% | 693 |
| 9 | William Hill | 107.3% | 3.0% | 660 |
| 10 | 888sport | 107.4% | 1.0% | 557 |
| 11 | Sky Bet | 107.4% | 0.0% | 696 |
| 12 | Livescore Bet | 108.0% | 9.0% | 588 |
| 13 | Virgin Bet | 108.0% | 9.0% | 588 |
| 14 | Betway | 108.3% | 1.0% | 652 |
| 15 | BoyleSports | 108.4% | 1.0% | 550 |
| 16 | Betfair Sportsbook | 109.4% | 4.0% | 304 |
| 17 | LeoVegas | 110.5% | 0.0% | 589 |
| 18 | Casumo | 111.0% | 0.0% | 425 |
| 19 | Betfair Exchange | 115.2% | 55.0% | 712 |
How this was measured
Each figure is the average overround on Champions League head-to-head match odds for UK bookmakers, from one snapshot a day since March 2026. A bookmaker is included only when it has at least 100 snapshots. Best-price share is the percentage of those snapshots in which that bookmaker had the highest price. The ranking is calculated before the article is written, and the table is the source of every figure above.
For press and bloggers: you can quote this page with a link to thebestbettingodds.com/stories/uk-ucl-margin-2026-10-06. The comparison bookmaker pages are at UK bookmakers.