Parlay mechanics & rules
In American sportsbooks, parlays link multiple point spreads, moneylines, or prop bets. A pushed/tied game reverts the bet to a parlay with one fewer leg.
Payouts are determined by multiplying the unit stake by the cumulative price of each winning selection or combination line. If any selection is scratched or declared non-runner/void, standard rules settle that leg at neutral odds of 1.00.
Worked example: Parlay
A $20.00 4-leg NFL parlay with legs at -110 (1.909), -110 (1.909), +150 (2.50), and -120 (1.833) combines to decimal odds of 16.70 (+1570 American), paying out $334.00 total ($314.00 profit).
Always check bookmaker maximum payout caps and race terms before placing high-volume system bets.
Parlay inputs & settings
Odds Format & Stake Sizing
Enter odds in American moneyline odds or switch between decimal, fractional, and moneyline formats. Ensure you verify whether you are entering unit stake per bet or total budget.
Settlement Conditions
Select the result for each pick (Won, Placed, Dead Heat, Void, or Lost) to calculate precise return figures.
CALCULATOR QUESTIONS
US Accumulator / Parlay questions
How does a void leg affect a parlay?
When a selection is void, postponed, or scratched, that specific leg counts as a 1.00 multiplier (money returned for that leg), and the multiple bet rolls down into the remaining folds.
What is the difference between unit stake and total stake?
Unit stake is the amount wagered on each individual bet or line. Total stake equals the unit stake multiplied by the total number of bets in the multiple or system wager.
Are gambling and betting winnings taxed?
In the US, gambling winnings are fully taxable as ordinary income by the IRS and state tax authorities, with Form W-2G issued on qualifying high-multiplier wins.