The Superfecta — picking the top 4 horses in exact order — pays massive dividends, often reaching tens of thousands of dollars. The 2022 Kentucky Derby paid $321,500 on a $1 bet when 80-1 longshot Rich Strike shocked the world.
However, a standard $1 or $2 ticket is too expensive to “Box” (cover all combinations). That’s where the 10-cent minimum changes everything. By lowering the unit stake to $0.10, you can afford to cover many more horses and give yourself a legitimate shot at a life-changing payout.
What is a Dime Superfecta?
The 10-cent superfecta (also called “dime super”) was introduced in 2004 at a New Hampshire greyhound track to attract more bettors and increase pool sizes. It quickly became the standard minimum at most tracks because it allows horseplayers to:
Box 6 horses for $36 instead of $360
Part wheels and keys become affordable
Even 10% of a $50K payout is $5,000
Box Cost Chart: 4 to 10 Horses
When you “box” horses, you cover all possible finishing orders for the top four positions. Here’s what it costs at different stakes:
| # Horses | Combinations | $0.10 Cost | $0.50 Cost | $1.00 Cost |
|---|---|---|---|---|
| 4 | 24 | $2.40 | $12.00 | $24.00 |
| 5 | 120 | $12.00 | $60.00 | $120.00 |
| 6 | 360 | $36.00 | $180.00 | $360.00 |
| 7 | 840 | $84.00 | $420.00 | $840.00 |
| 8 | 1,680 | $168.00 | $840.00 | $1,680.00 |
| 9 | 3,024 | $302.40 | $1,512.00 | $3,024.00 |
| 10 | 5,040 | $504.00 | $2,520.00 | $5,040.00 |
Combinations = n × (n-1) × (n-2) × (n-3)Where n = number of horses boxed
Key Wheel Cost Chart
A key wheel is when you select one “key” horse to finish in a specific position (usually 1st) and let other horses fill the remaining spots. This dramatically reduces costs compared to boxing.
| Key Horse (1st) | Other Horses | Combinations | $0.10 Cost | vs Box Savings |
|---|---|---|---|---|
| 1 horse keyed | 3 others | 6 | $0.60 | Save $1.80 vs 4-box |
| 1 horse keyed | 4 others | 24 | $2.40 | Save $9.60 vs 5-box |
| 1 horse keyed | 5 others | 60 | $6.00 | Save $30 vs 6-box |
| 1 horse keyed | 6 others | 120 | $12.00 | Save $72 vs 7-box |
| 1 horse keyed | 7 others | 210 | $21.00 | Save $147 vs 8-box |
| 1 horse keyed | 8 others | 336 | $33.60 | Save $268.80 vs 9-box |
Combinations = (n-1) × (n-2) × (n-3)Where n = total horses including key
Pro tip: You can also key a horse in the 1st AND 2nd positions (keying two horses) if you’re confident in the top two but uncertain about 3rd and 4th.
Part Wheel Strategy & Examples
The part wheel is the most flexible and efficient exotic bet strategy. You select different numbers of horses for each position based on your confidence level.
Part Wheel Examples
Example 1: Cold Exacta
Confident in 1st AND 2nd, spread 3rd-4th
2nd: #7
3rd: #1, #3, #5, #8
4th: #1, #3, #5, #8
Calculation: 1 × 1 × 4 × 3 = 12
Cost at $0.10: $1.20
Example 2: Key with Spread
Confident in winner, less certain on rest
2nd: #1, #3, #7, #8
3rd: #1, #3, #7, #8
4th: #1, #3, #5, #7, #8, #9
Calculation: 1 × 4 × 3 × 4 = 48
Cost at $0.10: $4.80
Example 3: Kentucky Derby Style
Wide coverage with key, backup for 2nd
2nd: #3, #14
3rd: #3, #7, #9, #14, #21
4th: #3, #7, #9, #14, #18, #21
Calculation: 1 × 2 × 4 × 5 = 40
Cost at $0.10: $4.00
Combinations = (horses in 1st) × (horses in 2nd) × (horses in 3rd) × (horses in 4th)Note: Subtract 1 from subsequent positions if same horse is used (can’t finish 1st and 2nd)
🎯 The “ALL” Button Strategy
Pro handicappers often use the “ALL” button for the 4th position in part wheels. Here’s why:
The 4th Place Problem
The 4th place finisher is the hardest to predict. It could be:
- A closer who just missed the board
- A frontrunner who faded
- A longshot who over-performed
The Solution
2nd: Your next 2-3 picks (#1, #7, #8)
3rd: Your next 3-4 picks (#1, #3, #7, #8)
4th: ALL (entire field)
Why it works: The cost increase from adding more horses in 4th is linear, not exponential. In a 12-horse field, using ALL in 4th vs 4 specific horses only increases cost by 3x — but catches every possible 4th place finisher.
Kentucky Derby Payout History
The Kentucky Derby produces some of the largest exotic bet payouts in racing. Here’s what recent top-4 finishes paid:
| Year | Top 4 Finish | $1 Payout | $0.10 Payout |
|---|---|---|---|
| 2025 | Sovereignty, Journalism, Baeza, Final Gambit | $1,682.27 | $168.23 |
| 2024 | Mystik Dan, Sierra Leone, Forever Young, Catching Freedom | $15,643.65 | $1,564.37 |
| 2023 | Mage, Two Phil’s, Angel of Empire, Derma Sotogake | $3,009.60 | $300.96 |
| 2022 🏆 | Rich Strike (80-1), Epicenter, Zandon, Simplification | $321,500.10 | $32,150.01 |
| 2021 | Medina Spirit, Mandaloun, Hot Rod Charlie, Essential Quality | $5,765.80 | $576.58 |
| 2019 | Country House, Code of Honor, Tacitus, Improbable | $51,400.10 | $5,140.01 |
| 2005 🏆 | Giacomo (50-1), Closing Argument, Afleet Alex, Don’t Get Mad | $864,253.50 | $86,425.35 |
Box vs Key Wheel vs Part Wheel: Which Strategy?
| Strategy | Best For | Typical Cost | Risk/Reward |
|---|---|---|---|
| Straight | Maximum confidence in exact order | $0.10-$1 | Lowest cost, hardest to hit |
| Box | Uncertain order, confident in 4-5 horses | $2.40-$36+ | Higher cost, easier to hit |
| Key Wheel | Strong opinion on winner | $0.60-$12 | Medium cost, good coverage |
| Part Wheel | Different confidence per position | Varies widely | Most flexible, best value |
When to Use Each Strategy
✅ Use a BOX when:
- You have 4-5 horses you’re confident will finish top 4
- You have NO opinion on their order
- Small field (8 horses or fewer)
✅ Use a KEY WHEEL when:
- You’re confident one horse will WIN
- Less certain about 2nd, 3rd, 4th
- Want significant savings vs boxing
✅ Use a PART WHEEL when:
- Different confidence levels per position
- Large field (Kentucky Derby, Breeders’ Cup)
- You want maximum value/flexibility
Which Tracks Offer a $0.10 Minimum?
Most major US tracks allow dime bets on this wager type:
How to Use This Calculator
- Bet Type: Select “Superfecta”
- Strategy: Choose Box, Key Wheel, or Part Wheel
- Horses: Enter how many horses in each position (or total for box)
- Unit Stake: Enter 0.10 for dime bets
- Calculate: See total combinations and cost
Looking for simpler exotic bets? Start with our Exacta Calculator (pick top 2) or Trifecta Calculator (pick top 3) before tackling the top-4 wager.
Related Horse Racing Calculators
- Trifecta Calculator — Pick the top 3 finishers
- Exacta Calculator — Pick 1st and 2nd place
- Pick 6 Calculator — Winners across 6 consecutive races
- Kelly Criterion Calculator — Optimal bet sizing
- Exotic Bets Explained — Complete guide to all wager types
Frequently Asked Questions (FAQ)
What is a 10-cent superfecta?
How much does a 10-cent superfecta box cost?
n × (n-1) × (n-2) × (n-3) × stake.Does a $0.10 bet pay the full dividend?
What is a key wheel?
What is a part wheel?
Which tracks offer a $0.10 minimum?
How do I calculate the number of combinations?
n × (n-1) × (n-2) × (n-3) where n = number of horses. For a key wheel (1 horse keyed in 1st): (n-1) × (n-2) × (n-3). For a part wheel: multiply the number of horses in each position. Example: 1 × 2 × 4 × 5 = 40 combinations.