Last updated: 10 September 2026
Quick Answer: A $100 four-team parlay with every leg priced at -110 pays $1,228.33 in profit if all four legs win, returning $1,328.33. Miss one leg and the ticket pays nothing. Those four prices multiply rather than add, which is why Power.win’s rules settle it as one bet.
The size of that number comes from compounding, and one comparison makes it obvious. Split the same $100 across four separate $25 singles on the same four games and a clean sweep returns $190.91. Put the whole $100 on one four-leg ticket and those same four results return $1,328.33. Same matches, same stake, one ticket instead of four.
What does a $100 4-team parlay pay?
A $100 four-team parlay at -110 per leg pays out $1,328.33 in total: $1,228.33 profit plus your $100 stake.
Here’s where each dollar comes from. The -110 price becomes 1.9091 in decimal odds, and each leg multiplies the running total rather than adding to it.
| Leg | Price | Decimal odds | Running multiplier | What $100 is worth |
|---|---|---|---|---|
| Leg 1 | -110 | 1.9091 | 1.9091 | $190.91 |
| Leg 2 | -110 | 1.9091 | 3.6446 | $364.46 |
| Leg 3 | -110 | 1.9091 | 6.9579 | $695.79 |
| Leg 4 | -110 | 1.9091 | 13.2833 | $1,328.33 |
The four legs compound to a final multiplier of 13.2833. Multiply that by your $100 stake and you get $1,328.33 back: your $100 returned, plus $1,228.33 of profit.
Two things move that figure on a real ticket. The first is rounding. Where odds carry more than two decimal places, Power.win rounds the payout to the second decimal (rule 4.4.11), so what lands in your balance is settled to the cent. The second is the price itself. -110 is a convention, not a law of nature. Real slips carry a different number on every leg, and a single leg shifting from -110 to -130 pulls the whole payout down.
Do you have to win the whole parlay to win?
Yes. Every leg has to land, and Power.win’s rules say so in as many words: an incorrect prediction in any of the events of a Combo results in the loss of the Combo (rule 4.4.2). There’s no partial credit, and no payout for going three out of four.
The one genuine exception is a voided leg, which is not the same thing as a losing leg. A voided selection drops out of the calculation instead of taking the ticket down with it. Whether a leg voids at all depends on the sport it sits on:
- A racing leg accepted after the event had already started is deemed void, and the remaining legs of the Combo stand (rule 3.5.2, in the racing rules).
- A leg on any other sport accepted after its event has started is treated the other way round. Under the general rules, a bet accepted after an Event has started, outside clearly indicated live in-play betting, has action unless a material advantage has been gained by the customer, and Power.win reserves the right to void it where it decides an unfair advantage was gained (rule 6.5, in the general rules).
- An abandoned, transferred or postponed race voids the single bet, and affected Combo Bets are recalculated excluding that event (rule 3.2.1, in the racing rules).
Whenever a leg does void, the arithmetic is the table above with one row removed. Void one of the four legs and the multiplier falls from 13.2833 to 6.9579, so a winning ticket returns $695.79 instead of $1,328.33. You keep the bet. You lose that leg’s contribution to the price.
One rule works differently, and it applies whatever the sport. Where two of your selections depend on each other, Power.win voids those bets rather than pricing them, and the rules give the example directly: backing a team to win the league combined with that same team winning the deciding game (rule 6.11, in the general rules). That is not a one-row-removed case, because the related bets themselves come off the slip. Build your ticket out of results that can move independently of each other.
None of this gets decided on the day. Power.win publishes the treatment of every one of these cases before you place the bet, on the sportsbook rules page.
How do you win on a parlay bet?
You pick two or more outcomes and put them on a single ticket. Power.win states this in the simplest possible terms: a Combo consists of several independent outcomes that must all be correctly predicted and failure to get even one of the predictions correct results in losing the entire Combo (rule 4.4.2).
A parlay turns those results into a single pass-or-fail event. What you gain is the multiplier. What you give up is separate settlement: the outcomes stay independent of each other, but they no longer settle one by one. Four singles let three winners pay for one loser. A Combo doesn’t.
Real slips rarely carry four identical prices. A mixed four-leg ticket works exactly the same way:
- -150 converts to 1.6667
- +120 converts to 2.20
- -110 converts to 1.9091
- +200 converts to 3.00
Multiply those four decimals together and the multiplier comes out at exactly 21.00. A $100 stake returns $2,100.00, of which $2,000.00 is profit. The two plus-money legs do around two-thirds of that lifting, which is the general shape of it: adding a longshot moves a parlay much further than adding another favorite does.
How do you work out a parlay payout without a calculator?
Three steps, in order, and they work for any number of legs.
- Convert every leg to decimal odds. A minus price becomes 1 + (100 / the number). A plus price becomes 1 + (the number / 100). So -110 is 1 + (100/110) = 1.9091, and +200 is 1 + (200/100) = 3.00.
- Multiply all the decimals together. Never add them. Four legs at 1.9091 give 1.9091 x 1.9091 x 1.9091 x 1.9091 = 13.2833.
- Multiply by your stake, then subtract the stake. 13.2833 x $100 = $1,328.33 returned, minus the $100 you put up, leaves $1,228.33 profit.
That is all a parlay odds calculator does. Doing it by hand once takes about two minutes, and it lets you hold the multiplier you’re being offered next to the one a fair four-leg bet would pay. That comparison is the next section.
Why a four-leg parlay carries more margin than four singles
Because the operator’s margin multiplies at exactly the same rate your odds do.
Start with one leg. A -110 price implies a 52.381% chance of winning. Price both sides of an event at -110 and the implied probabilities total 104.762%, not 100%. That extra 4.762 points is the margin, and expressed as a share of the book it comes to 4.55% on a single bet.
Now stack four of them. If each leg were a genuine coin flip, a fair four-leg parlay would pay 16.00 and return $1,600 on $100. It pays 13.2833 and returns $1,328.33. The $271.67 difference is the same 4.55% margin, compounded four times.
| Legs at -110 | Multiplier | $100 returns | Fair multiplier at 50/50 | Margin on the ticket |
|---|---|---|---|---|
| 2 | 3.6446 | $364.46 | 4.00 | 8.88% |
| 3 | 6.9579 | $695.79 | 8.00 | 13.03% |
| 4 | 13.2833 | $1,328.33 | 16.00 | 16.98% |
| 5 | 25.3591 | $2,535.91 | 32.00 | 20.75% |
Take the fair multiplier of 16.00 in the four-leg row. A bet that pays 16.00 is priced for something that happens 6.25% of the time, or one time in sixteen, which is how often four coin flips all land together. The 13.2833 you’re actually offered needs the ticket to come in 7.53% of the time just to break even. The gap between 6.25% and 7.53% is the margin, and it widens with every leg you add.
That matters more to your bankroll than the advertised payout does. A four-leg parlay is a low-frequency, high-variance bet: long stretches of losing tickets, then one large return. A stake sized for a single bet that settles every week behaves very differently on a ticket priced to come in 7.53% of the time. So decide the stake and how many tickets you’re running before the slate starts, and size them for the long gaps rather than for the one payout.
What Power.win calls a parlay, and the bet types next to it
Power.win’s rules call this bet a Combo. Accumulator, parlay and multi all mean the same thing on the same slip. The mechanics are the ones worked through above: a Combo pays your stake multiplied by the total odds of the Combo, and every outcome on it has to be correct.
Here is how the published rules define it, next to the two bet types that sit closest to it:
| Bet type | What the published rules define it as |
|---|---|
| Combo | A bet on several independent outcomes across different events. Every outcome must be correct; one wrong prediction loses the whole Combo. |
| Bet Builder | A bet on multiple markets within the same event, such as totals, 1X2 and player props. Every market must be correct. If a selection is voided, the remaining selections stand. |
| Early Payout | Settles an eligible selection as a winner early once its published conditions are met. On a Combo carrying both eligible and ineligible selections, only the eligible ones settle early and the rest stay open. |
Combos and Bet Builders both run on the Power.win sportsbook, which covers football, basketball and esports, with crypto deposits, though the rules note that Bet Builder isn’t offered on every sport, event or market. The restriction worth remembering before you build a ticket is rule 6.11, in the general rules: outcomes that depend on each other get voided rather than priced, so the selections on your slip have to be genuinely separate results, not one result described several ways.
Read more: the same margin arithmetic runs underneath casino games too, worked through in how crash game fairness and house edge fit together.
Frequently Asked Questions
Can you put two related outcomes on the same ticket?
No. Where two selections depend on each other, Power.win voids those bets instead of pricing them, and the rules give the example directly: backing a team to win the league alongside that same team winning the deciding game (rule 6.11, in the general rules). The related legs come off the slip rather than the ticket being recalculated, so build one out of results that can move independently.
Does a leg still stand if the bet was accepted after the event started?
It depends on the sport. A racing leg accepted after the event had already started is deemed void, and the remaining legs of the Combo stand (rule 3.5.2, in the racing rules). On other sports the general rules run the other way: a bet accepted after an event has started, outside clearly indicated live in-play betting, has action unless a material advantage has been gained (rule 6.5, in the general rules).
What happens if one leg of a parlay is void?
A four-leg parlay at -110 becomes a three-leg parlay, so the multiplier falls from 13.2833 to 6.9579 and a winning $100 ticket returns $695.79 instead of $1,328.33. The voided leg drops out and the rest of the ticket stands.
Is a parlay the same thing as a Combo?
Yes. Power.win’s betting rules use Combo as the primary term while treating accumulators, parlays, and multis as synonyms. A related product, Bet Builder, lets you combine different markets inside one event.
Why do parlay odds multiply instead of add?
Because you need every leg to land, and independent probabilities multiply. Each price is a probability distribution that sums to one, which is what the overround is measured against. The combined implied probability of having four successful legs, each at 52.381%, is 7.53%, and the 13.2833 multiplier is simply the inverse of that.
Sources (Citations)
- NIST/SEMATECH, e-Handbook of Statistical Methods §1.3.6.1 — probabilities across all outcomes of a discrete variable sum to 1, the basis of the overround.
- Wolfram MathWorld, Odds — betting odds as a ratio corresponding to the probability of winning.
- Power.win Sportsbook Betting Rules, verified 10 September 2026 — Combo (4.4.2), payout rounding (4.4.11), Bet Builder (4.4.13), Early Payout (4.4.14), bets accepted after an event has started (6.5, general rules), bets accepted after the official start time in racing (3.5.2, racing rules), abandoned and postponed races (3.2.1, racing rules), related outcomes (6.11, general rules). Linked in full above.
Take the Lead, Gamble Responsibly
The math above can read like an argument for stacking more legs on, but a bigger multiplier is simply a rarer bet. A four-leg parlay pays 13.2833 because the book prices it to land 7.53% of the time, while four true coin flips come in once in sixteen. A five-leg parlay pays more because it lands less often still. The number on the betting slip prices the unlikely event for you. It is not evidence that the event will happen.
If you find yourself adding legs to chase a bigger multiplier after a loss, or staking more than you decided to, that is the point to stop and set a limit. Power.win’s responsible gambling tools include deposit limits, wagering limits and self-exclusion, and all three are easier to configure on a quiet afternoon than during a fourth-quarter comeback. Set them while the arithmetic is still abstract, before a slate is running and three legs are already in. In the US, the National Council on Problem Gambling runs a free, confidential helpline at 1-800-MY-RESET (1-800-697-3738), twenty-four hours a day.
By the Power.win Editorial Team