LOUISVILLE, Ky. (WDRB) — Kentucky lawmakers have legalized fixed-odds wagering on horse races after overriding Governor Andy Beshear's veto of a bill which included the measure.

The change comes through House Bill 904, a wide-ranging measure that is reshaping sports betting in the state. 

Beshear said in a statement he vetoed the bill because of a provision that would "authorize two executive branch agencies, the Kentucky Lottery Organization and the Kentucky Horse Racing and Gaming Corporation, to file emergency and ordinary administrative regulations without the Governor's review and signature."

Following the override of the governor's veto, the bill takes effect in July, which means fixed-odds won't be offered in time for Saturday's running of the Kentucky Derby at Churchill Downs.

What is fixed-odds betting?

Fixed-odds wagering allows bettors to lock in a price at the moment they place a bet. If someone wagers on a horse at 5-1 odds, that payout stays the same — regardless of how the odds shift before the race begins.

That’s a significant departure from the pari-mutuel system used at U.S. racetracks for more than a century.

How is that different from pari-mutuel?

In pari-mutuel betting, all wagers of a similar type are pooled together. Odds fluctuate up until the race starts, based on how much money is placed on each horse.

That means a bettor might place a wager when a horse appears to be 5-1, only to see those odds drop to 3-1 — and receive a smaller payout if the horse wins.

With fixed-odds betting, the bettor knows exactly what they stand to win at the time the bet is placed.

Why it matters

Supporters argue fixed-odds wagering brings horse racing more in line with mainstream sports betting, where locking in odds is standard practice. They say it could attract younger bettors and keep Kentucky competitive with other states experimenting with similar models.

Opponents, however, have raised concerns about how the system could impact racetrack revenues and the traditional betting pools that help fund purses and the broader racing ecosystem.

There are also questions about how odds will be set and regulated, since fixed-odds wagering typically involves bookmakers or approved operators rather than a shared betting pool.

What happens next

State regulators will now be tasked with building out the framework for how fixed-odds betting will operate in Kentucky, including who can offer it and how it will coexist with pari-mutuel wagering.

The Kentucky Horse Racing and Gaming Corporation is expected to oversee implementation, though a timeline for when bettors will be able to place fixed-odds wagers on races has not been finalized.

For now, as the Kentucky Derby approaches, the familiar pari-mutuel system remains the standard at Churchill Downs — but a new era of betting is on the horizon.

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