Horse racing isn’t bet like football. There’s no sportsbook setting a line or locking in odds. Instead, every bettor contributes to a shared pool, and payouts depend on how that pool is distributed.
That’s the foundation of parimutuel betting: a system where bettors compete against each other, not the house, and odds shift continuously until the race begins.
Definition: Parimutuel Betting
Parimutuel betting is a wagering system where all bets are placed into a shared pool and payouts are determined after the track deducts a percentage called the takeout.
Core Market Principles
- All wagers go into shared pools.
- Bettors compete against each other.
- The track removes a takeout.
- Payouts depend on pool distribution.
What Is Parimutuel Betting in Horse Racing?
Parimutuel betting works by pooling all wagers together. After the race, the track deducts its percentage, and the remaining funds are distributed among winning tickets.
Unlike sportsbooks, odds are not fixed. They are shaped by how money flows into the pool. The more bettors back a horse, the lower its payout.
Key Insight
Concept:
All bets enter a shared pool.
Why it matters:
Payouts depend on how money is distributed.
How Do Parimutuel Betting Pools Work?
Each race has separate pools for each wager type (win, exacta, trifecta). Once betting closes, the track deducts its takeout and distributes the remaining pool.
Example
Total Pool:
$100,000
After Takeout:
$85,000 distributed to winners
| Pool Size | Payout Behavior |
|---|---|
| $20,000 | High volatility |
| $100,000 | Moderate stability |
| $500,000+ | More stable payouts |
Why Do Odds Change Before Race Time?
Odds shift continuously because bettors are constantly adding money to the pool. Late wagers can dramatically change payouts just before post time.
Key Insight
Concept:
Odds reflect pool distribution.
Why it matters:
Late money can change payouts significantly.
Types of Bets in Parimutuel Systems
All horse racing wagers operate within their own pools.
| Bet | Requirement |
|---|---|
| Win | Finish 1st |
| Place | Top 2 |
| Show | Top 3 |
Exotic Bets
- Exacta – pick top 2 in order
- Trifecta – pick top 3
- Superfecta – pick top 4
Parimutuel vs Sportsbook Betting
| Feature | Sportsbook | Parimutuel |
|---|---|---|
| Odds Source | Bookmaker | Betting pool |
| Price Lock | At bet time | At post time |
| Opponent | House | Other bettors |
Online Racebooks Explained
Modern bettors access parimutuel pools through online racebooks. These platforms connect directly to track pools, allowing you to bet remotely while participating in the same market.
See Parimutuel Betting Live
Watch odds shift in real time and follow betting pools using the MyBookie Racebook.
Explore the RacebookFAQ
What is parimutuel betting?
It’s a system where bettors wager into shared pools and payouts are distributed among winners after deductions.
Why do odds change?
Because they reflect how money is distributed in the betting pool.
What is takeout?
The percentage removed by the track before payouts are calculated.
Summary
- Parimutuel betting uses shared pools
- Odds are crowd-driven
- Payouts depend on distribution
- Odds change until post time
Final Thoughts
Parimutuel betting creates a dynamic, crowd-driven market where payouts are never fixed and odds reflect real-time betting behavior.
Understanding pool mechanics, takeout, and betting distribution gives you a clearer edge when navigating horse racing markets.
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About the Author
Since 2008, D.S. Williamson has written about sports and sports handicapping. His philosophy is value-based, meaning stats and other handicapping factors are only worth something in comparison to wagering odds. He believes money management and making value-based wagers is the single more important factor that distinguishes successful sports bettors from non-successful sports bettors.
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