A teaser lets you move the spread in your favor across several bets in exchange for a shorter price. The math that decides whether that trade is any good comes down to one break-even win rate per leg — and to whether the points you buy cross the numbers football games land on most.
A teaser looks like a gift. You take two or more football sides, the sportsbook moves every spread several points in your direction, and you get a single ticket that only needs those adjusted spreads to hold. The catch is the payout: a teaser pays much less than the same legs would as a straight parlay. Whether the trade is worth taking is not a matter of feel — it is a break-even calculation you can run before you place the bet.
What a teaser actually does
Start with two NFL sides at the standard spread. A six-point teaser moves each of them six points the way you want: a favorite laying 7.5 becomes 1.5, an underdog getting 2.5 becomes 8.5. Like a parlay, all legs must cover for the ticket to win. Unlike a parlay, you paid for the extra points with a shorter price — a two-team six-point teaser is commonly offered around -120.
So a teaser is a parlay with two changes baked in: your spreads are friendlier, and your payout is smaller. The friendlier spreads raise each leg's chance of covering; the smaller payout raises the win rate you need to profit. The entire question is whether the first effect outruns the second.
The break-even win rate
Treat the teaser as an all-or-nothing bet on both legs covering. At -120 the decimal price is 1.8333, so a winning $100 ticket returns $183.33. If each leg covers with probability p and the legs are independent, the ticket wins with probability p², and break-even is the point where the expected return equals the stake.
Now the number 73.9% has meaning. Standard NFL sides are built to cover roughly half the time. Six free points have to lift each leg from around 50% all the way past 73.9% for the teaser to be worth more than it costs. Six points can absolutely do that — but only if they are spent on the right part of the number line.
Why 3 and 7 are the whole game
Football is not scored in a smooth spread of margins. Because points come mostly in threes and sevens, final margins pile up on specific numbers — 3 and 7 above all, then 6, 10, and 14. Those are the key numbers, and a spread that sits on or near them behaves very differently from one that does not.
| Favorite -8.5 → -2.5 | crosses 7, 6, AND 3 — the strongest teaser real estate |
|---|---|
| Underdog +1.5 → +7.5 | crosses 3 AND 7 the other direction — also premium |
| Favorite -11.5 → -5.5 | crosses only 7 — much weaker, same price |
| Favorite -6.5 → -0.5 | crosses 3 but stops short of a full turnover — partial value |
This is why serious teaser discussion is almost entirely about starting spreads between about +1.5 and +2.5 for dogs, and about -7.5 to -8.5 for favorites — those are the ranges where six points sweep across both 3 and 7. Outside those windows the same teaser at the same price is a worse bet, because the points are being spent on empty parts of the number line.
Buying points on a single side
Teasing is a bulk version of a simpler idea: buying points. Most books let you move a single spread half a point or more for a worse price on that one bet. The logic is identical — a half point is cheap when it moves you off a dead number and expensive when it moves you onto or across a key one. Buying a favorite from -3 to -2.5 removes the push and the loss on an exact three-point win, which is why that specific half point is the most expensive one on the board.
What the math does not settle
- It does not guarantee a profit. Clearing 73.9% per leg requires the points to cross real key numbers and the underlying sides to be roughly fair — neither is automatic, and books adjust teaser rules precisely where the value would otherwise sit.
- It does not apply cleanly to non-football sports. Basketball and other continuous-scoring sports do not have the same dense key numbers, so teaser math that works in the NFL rarely transfers.
- It is not a pick. This explains how to price a teaser, not which games to tease.
Frequently asked
What win rate does a two-team six-point teaser need to break even?
At a -120 price, each leg has to cover about 73.9% of the time, for a combined ticket win rate near 54.5%. That comes straight from the price: the decimal is 1.8333, break-even is p² × 1.8333 = 1, so p = √(1/1.8333) = 0.739.
Why do teaser strategies focus so heavily on 3 and 7?
Because NFL final margins cluster on those numbers. A point is only worth what it crosses, and six points that sweep a spread across both 3 and 7 convert far more near-misses into covers than six points spent elsewhere. Same price, very different value depending on the starting spread.
Is buying a single point the same idea as a teaser?
Yes, in miniature. Buying points moves one spread for a worse price on that bet; a teaser moves several spreads across a linked ticket. In both cases a point is cheap off a dead number and expensive on or across a key one — which is why moving a favorite from -3 to -2.5 costs the most.
Do teasers work outside football?
Rarely in the same way. The whole edge case depends on dense key numbers like 3 and 7, which exist because of how football is scored. Continuous-scoring sports spread their margins more evenly, so the crossing-a-key-number logic mostly does not carry over.