How Often Does the Favourite Win a Horse Race?

Photo by @coldbeer

Punters often expect the favourite to stroll past the post. But racing doesn’t work like that. Many studies have been done on the subject, and, as a rule, the favourite usually wins around 30–35% of the time. And, if you were wondering, the second favourite usually wins around 18-21% of the time.

These odds are big enough to matter, but small enough to keep things interesting. The real question is, of course, how do you use this when placing a bet?

How Often Does the Favourite Win?

Most analysts peg the favourite’s strike rate at roughly 30-35%: three wins in every ten races is a good rule of thumb. While the exact figure shifts by country and by race type, this average appears again and again in post-race reviews and data breakdowns.

Short, flat races often see favourites fare better. But big handicaps with large fields? Not so much. If you like detail, look at the tools and stats that split results by race type rather than trusting the headline number. These should be available on all established brands covering UK horseracing in addition to many other sports features.

Why Favourites Win Only a Third of the Time

There are two main reasons why favourites don’t win all the time. The first is called the favourite-longshot bias. This refers to a long-running finding in betting studies that longshots are overbet, while favourites get underpriced.

Academics have dug into whether folks back longshots because they love the small chance of a big win, or rather because people misjudge probabilities. Either way, it tilts returns and keeps the favourite’s win rate lower than many expect (see this NBER paper by Snowberg & Wolfers examining the longshot-bias for an academic take).

Secondly, not all favourites are equal. Odds-on favourites win much more often than, say, a 4-to-1 or 6-to-1 market leader. But then, there aren’t that many odds-on favourites. And moderately priced favourites make the average number fall even more.

If you bring the second favourite into the picture, the top two market picks usually account for more than half of the winners. This is why some punters only look at the top pair, even if that approach isn’t a guaranteed money-maker after the bookie’s cut.

How To Use This When You Bet

Knowing that the favourite wins about a third of all races should change your betting habits. Although there are exceptions, such as Tiger Roll, that won the Grand National twice in a row, there are generally basic guidelines you can follow.

Don’t back every favourite. Over time, the margin and market bias bite into your returns. Also, make sure to look for value, not comfort. Only stake when the price is better than the chance you assign.

Check context and determine factors that could influence the odds of the favourite winning. Race class, field size, recent form, jockey changes, and going can all move a short-priced chance into real value.

Watch the market, as early money for a horse can be an indication of something big. Keep in mind, though, that public-driven shortening isn’t always useful info. Smart bettors look for mismatches between price and real chance, whether on the racecourse or an NBA stadium.

Conclusion

The favourite wins enough to matter, but not enough to be a safe bet every time. Keep the 30-35% figure in your head, do your homework, and be picky.

While backing the favourite can feel comfortable and justified, comfort rarely equals profit. If you want consistent edges, combine form study with market reading and only back spots where the price makes sense to you.