A parlay bet combines multiple individual wagers into a single ticket. To win, every leg must hit. The reward is dramatically higher than betting each leg separately — potential payouts on 4+ leg parlays often run +500 to +5000 or higher. The catch: parlay hold is much higher than single-bet hold.
How parlay payouts are calculated
Multiply the decimal odds of every leg, then multiply by stake. Three legs at decimal 1.91 each on $100: 1.91 × 1.91 × 1.91 × $100 = $696.
The more legs, the higher the multiplier. A 5-leg parlay at -110 each pays approximately +2530 (29.6x decimal). A 10-leg parlay pays roughly +47000 (471x decimal). The math compounds rapidly.
Why parlays have higher hold
Per-leg vig compounds across the parlay. A -110/-110 single bet has 4.5% structural margin. A 5-leg parlay of -110 legs has 5.7%^5 - 1 = roughly 32% combined hold (worse than the simple 4.5% × 5 = 22.5% you might expect because of multiplication).
Industry data shows parlay hold typically 14-25% across operators, compared to 4-7% on single bets. Same Game Parlays specifically run 14-22% hold because operators price correlation explicitly.
When parlays make sense
- 2-3 leg parlays of independently +EV singles. If you've identified two genuinely +EV bets, parlaying them (assuming legs are uncorrelated) maintains the +EV.
- Same Game Parlays where correlation is mispriced. When the book's correlation model is off, a properly-built SGP can be +EV.
- Wong teasers (NFL). 6-point teasers crossing the 3 and 7 in NFL have historical +EV in specific spread ranges.
- Round robins for variance smoothing. A round robin breaks a list of teams into multiple smaller parlays.
Parlay mistakes to avoid
- 6+ leg parlays. Per-leg vig compounds. Even +EV singles produce -EV parlays once you stack 6+ legs.
- Highly-correlated legs in cross-game parlays. Operators may detect and price correlation, but cross-game correlation often slips through. Don't assume independent pricing.
- Boost parlays with hidden juice. Boosted parlay prices often look impressive but are still 30-50% behind fair value despite the boost.
- Same-stake parlay sizing as singles. A $50 parlay risks the same $50 as a $50 single — but the variance profile is wildly different. Size parlay stakes accordingly.
Frequently asked questions
What is a parlay bet?
A combination bet that requires every leg to win for any payout. Higher potential payout than single bets, but compounding vig means parlay hold is significantly higher than single-bet hold.
How do I calculate parlay payouts?
Multiply the decimal odds of every leg, then multiply by stake. Use our parlay calculator at /tools/parlay/ for any number of legs in any odds format.
What's the typical hold on a parlay?
14-25% combined hold, compared to 4-7% on single bets. Same Game Parlays specifically run 14-22% because operators explicitly price correlation.
Can I cash out a parlay early?
Most operators offer cash-out on partially-completed parlays (when most legs have already won). Cash-out prices typically carry 5-15% additional juice.
Are parlays profitable long-term?
Generally no for retail bettors. Parlays can be profitable when 2-3 legs are genuinely +EV singles or when correlated SGPs have mispricing — but most retail parlay activity loses money.