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October 3, 2026The 3-horse exacta, also known as a trifecta key, is a popular wager in horse racing that offers a potentially high payout while requiring a bit more prediction than a standard exacta; It involves selecting three horses and having them finish first, second, and third in the correct order. This article breaks down everything you need to know about this exciting bet.
What is an Exacta?
Before diving into the 3-horse version, let’s quickly recap the basic exacta. An exacta requires you to pick the horses that will finish first and second in a race, in the exact order. A $2 exacta costs $2. The payout depends on the odds of the winning combination.
How Does the 3-Horse Exacta Work?
The 3-horse exacta expands on this. Instead of predicting just the top two, you’re predicting the top three. You choose three horses. These horses must finish 1st, 2nd, and 3rd, in the precise order you selected.
Cost of a 3-Horse Exacta
A $1 3-horse exacta bet costs $6. This is because there are 3! (3 factorial) possible orderings of three horses: 3 x 2 x 1 = 6. Therefore, you’re essentially placing six separate $1 exacta bets covering all possible finishing orders of your chosen horses.
Example
Let’s say you believe horses #2, #5, and #8 will finish in the top three. A $1 3-horse exacta bet on these horses covers these six combinations:
- #2 — #5 — #8
- #2 — #8 ⎻ #5
- #5, #2, #8
- #5 ⎻ #8 ⎻ #2
- #8 — #2 — #5
- #8 ⎻ #5 — #2
You win if any of these combinations occur.
Strategies for Picking 3-Horse Exactas
Picking the right three horses is crucial. Here are some strategies:
- Form Study: Analyze past performances, speed figures, and jockey/trainer stats.
- Track Bias: Consider if the track favors certain running styles (e.g., speed, closers).
- Pace Scenario: How will the race unfold? A fast pace might favor closers.
- Keying: Select one strong horse to finish first and combine it with two others for second and third.
- Using Your Eye: Watch the horses in the paddock and during the post parade.
Payouts
3-horse exacta payouts can be substantial, especially in races with long odds. The payout is determined by the total pool and the number of winning tickets. Lower-odds races will have smaller payouts, while races with upsets can yield significant returns.
Where to Place Your Bet
You can place 3-horse exacta bets at the track, through online wagering platforms (TVG, TwinSpires, etc.), or via ADW (Advance Deposit Wagering) systems.




