The win rate needed to break even at given odds, accounting for the vig.
Break-even percentage tells you exactly how often you need to win at specific odds to neither profit nor lose money over time. At standard -110 odds, you need to win 52.38% of your bets to break even.
This is a critical concept because it sets the bar for profitability. A sports bettor picking winners at 55% against -110 lines is generating significant profit. But if they're only winning 51%, they're losing money despite being right more often than not.
The break-even percentage increases as the vig increases. This is why shopping for the best odds matters — even going from -112 to -110 lowers the bar you need to clear.
A Chiefs spread posted at -110 on DraftKings requires you to risk $110 to win $100. The break-even percentage is 110 / 210 = 52.38% — you must win more than 52.38% of your -110 bets just to escape the vig.
At -120 the break-even jumps to 54.5%, and at -150 it climbs to 60%. A bettor hitting 55% at -110 earns a 5% ROI on a $100-per-bet schedule, generating roughly $5 profit per wager. The same 55% win rate at -150 produces a loss of about $2.50 per bet. Shopping lines to convert -115 into -108 across Pinnacle, Circa, and BetMGM drops break-even by nearly a full percentage point and converts marginal records into profitable ones.
At negative American odds: BE% = |odds| / (|odds| + 100). At positive: BE% = 100 / (odds + 100)<p>A Chiefs spread posted at <strong>-110</strong> on DraftKings requires you to risk $110 to win $100. The break-even percentage is <strong>110 / 210 = 52.38%</strong> — you must win more than 52.38% of your -110 bets just to escape the vig.</p><p>At -120 the break-even jumps to <strong>54.5%</strong>, and at -150 it climbs to <strong>60%</strong>. A bettor hitting 55% at -110 earns a 5% ROI on a $100-per-bet schedule, generating roughly $5 profit per wager. The same 55% win rate at -150 produces a <em>loss</em> of about $2.50 per bet. Shopping lines to convert -115 into -108 across Pinnacle, Circa, and BetMGM drops break-even by nearly a full percentage point and converts marginal records into profitable ones.</p>
The win rate needed to break even at given odds, accounting for the vig.
At negative American odds: BE% = |odds| / (|odds| + 100). At positive: BE% = 100 / (odds + 100)
<p>A Chiefs spread posted at <strong>-110</strong> on DraftKings requires you to risk $110 to win $100. The break-even percentage is <strong>110 / 210 = 52.38%</strong> — you must win more than 52.38% of your -110 bets just to escape the vig.</p><p>At -120 the break-even jumps to <strong>54.5%</strong>, and at -150 it climbs to <strong>60%</strong>. A bettor hitting 55% at -110 earns a 5% ROI on a $100-per-bet schedule, generating roughly $5 profit per wager. The same 55% win rate at -150 produces a <em>loss</em> of about $2.50 per bet. Shopping lines to convert -115 into -108 across Pinnacle, Circa, and BetMGM drops break-even by nearly a full percentage point and converts marginal records into profitable ones.</p>
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