Even Money

Even money — sportsbooks write it as +100 — is the one price on the board with no built-in house skew baked into the payout itself. Bet $100, win $100 in profit (plus your $100 stake back), on top of whatever the sportsbook’s vig cost you to get that number in the first place. It’s the break-even point between plus and minus odds: shorter than +100 and you’re laying more than you’d win; longer than +100 and you’re risking less than the potential payout.

The term gets used two ways, and mixing them up causes confusion. First, it’s a literal price a book posts — a pick’em point spread game, or a prop like “will there be a save in this MLB game” sometimes lands at +100 on both sides. Second, “even money” gets used loosely to describe any close-to-coin-flip proposition, even when the actual number is -105 or +105 rather than dead-even +100. Precision matters here because those few points of vig are exactly where the house edge lives.

What makes +100 useful as a reference point is that it’s the only price where implied probability and payout ratio are identical and intuitive: 50% to win, 1-to-1 payout. Every other American odds number requires you to do a conversion in your head. That’s why sharp bettors use “even money” as a mental anchor — when you’re deciding whether a -120 favorite is worth it, you’re really asking “is this team more likely to win than the ~54.5% implied by -120,” and the even-money line is your intuitive starting point for that judgment.

Example

Say DraftKings posts a same-game parlay leg on a Bills-Dolphins Thursday night game: “Josh Allen throws for over 1.5 touchdown passes AND under 275.5 passing yards,” priced at +100. You bet $150.

Win: you collect $150 in profit, plus your original $150 stake, for a $300 total return. Lose: you’re out the full $150, nothing back.

Now compare that to a nearby alternative on the same board — a similar-probability prop priced at -110 instead. To win that same $150 in profit, you’d have to risk $165 (since -110 means laying $110 to win $100, scaled up). At even money, you saved yourself $15 in stake for the identical $150 win — that’s the vig difference between a true coin-flip price and a standard-juiced one made visible in dollars.

Run the implied probability check: +100 implies exactly 50% to hit. If you think Allen clears 1.5 TD passes and stays under 275.5 yards more than half the time based on Miami’s pass defense and Buffalo’s recent run-heavy game script, the bet has positive expected value. If you think it’s closer to 45%, even money is actually overpriced in your favor being taken by the book, and you should pass regardless of how “fair” +100 sounds.

Key Points

• +100 is the free conversion point: at even money, stake and profit are the same number, so it’s the fastest odds format to do real-time math on. Use it as your mental yardstick when eyeballing whether a -115 or +120 number is generous or stingy relative to a true 50/50 shot.
• Even money is not automatically fair: a coin-flip payout is only “fair” if the true probability really is 50%. Books post +100 lines on plenty of props and pick’em spreads where the actual outcome is more like 47/53 — the price looks neutral, but the edge still favors the house.
• Compare it against the vig-standard price: the fastest way to see how much juice you’re avoiding (or accepting) is to line up +100 against -110 or -115 on a similarly-probable bet. The stake difference to win the same profit is the vig made concrete in dollars, not abstract percentage points.
• Watch for it in parlays and pick’em contests: survivor pools, pick’em point spreads, and some SGP legs frequently land at or near even money because the book has engineered two roughly equal outcomes. That’s exactly where shopping multiple books for who’s offering +105 instead of -105 on the “same” bet pays off.
• Don’t confuse “close to even” with “even”: -105 and +105 both get called “even money” casually, but they’re not the same bet. On -105 you risk more than you win; on +105 you risk less. Over hundreds of bets that gap compounds into real money, so always check the actual number, not the vibe.
• Bankroll math is simplest at even money: because win and loss amounts mirror each other exactly, even-money bets are the cleanest way to size a unit for new bettors learning bankroll management — one clean number to reason about, no partial-return arithmetic to slow you down.