Combo bets pay big because every leg multiplies the odds. They also cost more than they look, because every leg multiplies the bookmaker’s margin too.
Accumulator boosts, also called combo multipliers, raise the combined odds of an eligible combo by a fixed factor once it reaches a set number of legs. Sportsbooks offer them to make crypto sportsbook combos with more legs more attractive.
Boosts rarely erase the extra cost of a long combo. Some tiers close most of it, while others close only part, and the table further down shows the difference in numbers.
How a Combo Boost Works
Build a combo of several independent selections, and the sportsbook multiplies their odds together. The boost then adds one more multiplier, scaled to the number of legs.
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Qualification: the boost starts at a minimum leg count and grows at higher counts
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Payment: the boost pays only when every leg wins, just like the combo itself
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Calculation: the multiplier usually counts as one more odd in the combined price
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Limits: maximum payout rules still cap what a successful combo can return
Football accumulators are the most common home for boosts, since weekend fixture lists make six or eight legs easy to assemble.
Combo+ on Dexsport
Dexsport calls its boost Combo+ and applies it automatically to eligible combos at four fixed steps.
Legs in the combo
Combo+ multiplier
4
1.08
6
1.15
8
1.2
10
1.5
Last verified: September 2026
The steps jump sharply at ten legs. Dexsport’s rules treat the multiplier as a regular odd within the combined price, and bets on the platform start from $1, which keeps long combos cheap to try. Operator terms change, so check the current Combo+ table before a large combo.
Margin Multiplies With Every Leg
Every leg includes the bookmaker’s margin, and a combo multiplies those margins together. The illustration below assumes each leg is a fair coin flip priced at 1.91, a common two-way price, so each leg returns about 95.5% of its stake on average.
Legs
Combined odds at 1.91
Expected return without boost
Expected return with Combo+
4
13.3
83.2%
89.8%
6
48.6
75.9%
87.2%
8
177.1
69.2%
83.0%
10
646.2
63.1%
94.7%
Three patterns stand out. Each boost narrows the extra cost but leaves some of it in place; the ten-leg tier comes closest to a single bet’s return, and eight legs is the weak spot where the boost trails the added margin per leg.
Real prices vary by market, and Premier League odds differ between books, so read the table for its proportions, not as a promise.
Five Rules That Change the Payout
Boost terms decide more than the headline multiplier, and Dexsport’s rules spell out several of them.
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Cash Out cancels the boost. Close a combo early and Combo+ disappears from the settlement
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Partial results recalculate it. Legs that settle as half won, half lost or refunded change the multiplier
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Refunds can reset it. Once more than two legs end as refunds, the multiplier falls to 1
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Payout caps still apply. Successful combos cannot pay more than the maximum for a single bet, which is $5,000 on the largest events and $500 on others
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Same-event legs cannot mix. Two different outcomes from one event cannot share a combo
The cap matters most at ten legs. Stake $10 on ten legs at 1.91 with the 1.5 boost, and the slip shows a potential return near $9,690, above the $5,000 limit for the biggest events, so any return past that point never pays.
Conclusion
Combo boosts reward longer accumulators with a fixed multiplier, and on Dexsport, Combo+ rises from 1.08 at four legs to 1.5 at ten.
The maths shows why that matters. With legs priced at 1.91, expected return falls from 83.2% at four legs to 63.1% at ten without a boost, and Combo+ lifts those figures to 89.8% and 94.7%. Every tier still leaves a combo below the return of a single bet.
Check the Cash Out, refund, and payout-cap rules before a long combo. Know the law where you live, fix a stake limit for combos, and wager only if you are of legal age, since KYC or AML checks may apply. Responsible gambling matters most on long odds.
Disclaimer: The information here is provided for general purposes only and is not legal, tax, investment, or financial advice, and nothing here is a betting tip or prediction. Figures in the worked table are illustrative and assume a fixed price on every leg. Boost terms, limits and rules change, so check current details on the platform before you bet. Sports wagers involve risk, and rules vary by country, so check the law where you live. Please play responsibly, within your means, and only if you are of legal age.
