Belgian Pro League Odds vs Actual Results
Do bookmaker odds match reality? We removed the bookmaker margin from Bet365 pre-match 1X2 odds in 3,102 Belgian Pro League matches (July 2015 – September 2026) and compared implied probability with how often each outcome really happened.
Key findings
- Across all probability bands with at least 30 matches, implied and actual frequencies differ by 1.7 percentage points on average. Bookmaker probabilities are close to reality.
- Largest gap in a band with 100+ matches: home win at 70–80% implied (174 matches): implied 73.9%, actual 78.2% (+4.2 points).
- Draws: implied 24.8% on average, actual 24.6%.
Differences inside a single band can be pure chance, especially with fewer than a few hundred matches. Read the table as a pattern, not as a list of exceptions.
Calibration chart
Each dot is a 10-point probability band (blue = home win, gold = draw, red = away win). Dot size reflects matches. A perfectly calibrated market lies on the dashed diagonal. Bands with fewer than 30 matches are hidden.
Detailed tables
Home win
| Implied probability | Matches | Avg implied | Actual | Difference |
|---|---|---|---|---|
| 10–20% | 199 | 16.7% | 15.1% | -1.6 pts |
| 20–30% | 474 | 25.4% | 27.0% | +1.6 pts |
| 30–40% | 643 | 34.9% | 32.2% | -2.7 pts |
| 40–50% | 642 | 45.0% | 42.7% | -2.3 pts |
| 50–60% | 553 | 54.8% | 58.8% | +4.0 pts |
| 60–70% | 390 | 64.5% | 65.6% | +1.1 pts |
| 70–80% | 174 | 73.9% | 78.2% | +4.2 pts |
Draw
| Implied probability | Matches | Avg implied | Actual | Difference |
|---|---|---|---|---|
| 10–20% | 344 | 17.3% | 14.0% | -3.4 pts |
| 20–30% | 2735 | 25.7% | 25.8% | +0.1 pts |
Away win
| Implied probability | Matches | Avg implied | Actual | Difference |
|---|---|---|---|---|
| 0–10% | 129 | 8.3% | 8.5% | +0.2 pts |
| 10–20% | 693 | 15.4% | 13.6% | -1.9 pts |
| 20–30% | 778 | 25.0% | 23.0% | -2.0 pts |
| 30–40% | 660 | 34.8% | 37.1% | +2.3 pts |
| 40–50% | 470 | 44.7% | 47.0% | +2.3 pts |
| 50–60% | 264 | 54.4% | 53.0% | -1.4 pts |
| 60–70% | 98 | 63.9% | 70.4% | +6.5 pts |
Method
For each match we take Bet365 pre-match decimal odds for home, draw and away and convert them to probabilities (1 / odds). Because bookmakers build in a margin, the three probabilities add to more than 100%, so we divide each by their sum (proportional margin removal; see our no-vig calculator). Matches are then grouped into 10-point bands of implied probability, and we count how often that outcome actually occurred.
See also Belgian Pro League results and goals by season. Updated 03 October 2026.