How-To
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How to find the best point spread on an NFL game: shopping the number before the price, what a half point around 3 is worth in break-even terms, and how prediction-market spreads compare with -110.
No single app: the best spread on an NFL game can sit at a different app each week, and on each side of the same game. Compare the number first, then the price.
Pre-game cost: Novig charges neither the buyer nor the seller on a pre-game spread, so a 50-cent contract needs a 50% win rate. A -110 sportsbook spread needs 52.38%.
Half points: around 3, a half point is worth more than any other. On a game that’s a fair -3, the favorite at -2.5 is still the better bet at prices up to about -135, against -3 at -110.
Sportsbook margins: in historical NFL closing lines, Circa’s spread vig averaged about 3.0%, against about 4.5% at DraftKings and FanDuel and 5.0% at BetMGM and Caesars.
In-game: Novig and the other prediction markets charge a taker fee once the game starts, and a maker whose resting order fills on Novig pays no fee.
The app with the best NFL spread is whichever one has the best number at the best price on the side you want, and that changes game to game. Every spread quote carries a number (Bills -2.5) and a price (-110), and apps differ on both.
On cost alone, a pre-game spread is cheapest on a prediction market that charges no fee on it. Novig’s published fee schedule puts no fee on either side of a pre-game straight trade, and a spread is a straight trade, so buying 100 contracts at 50 cents costs $50, and a cover pays $100. Kalshi, Polymarket, and ProphetX all take a fee on that trade, and sportsbooks build their margin into the price, usually -110 on each side.
Where | How the spread is priced | Cost of an even-money spread | Break-even win rate |
|---|---|---|---|
Novig, pre-game | Contract price, no fee | 50 cents | 50.00% |
ProphetX | Contract price, 2% of net winnings | 50 cents, 2% off the win | 50.51% |
Polymarket | Contract price plus taker fee, by volume | 50 cents plus 1.74 to 2.38 cents | 51.74% to 52.38% |
Kalshi | Contract price plus taker fee | 50 cents plus 1.75 cents | 51.75% |
Sportsbook at -105 | Margin in the price | Risk $105 to win $100 | 51.22% |
Sportsbook at -110 | Margin in the price | Risk $110 to win $100 | 52.38% |
Fees as published on Nov. 9, 2026, for a taker.
The prediction-market rows assume there’s a contract on offer at exactly 50 cents. Other users’ orders set that price, and on a quiet game the cheapest offer can be a cent or two above 50. The gap between the best buy and sell price works like a margin, so it belongs in the comparison.
On a spread, the line usually counts for more than the price, because NFL games end on a handful of margins. Field goals and touchdowns with the extra point push final scores toward 3 and 7. In 2015 through 2025, 14.8% of NFL games ended with a three-point margin and 8.7% with seven, per nflverse game data summarized in the point spread guide. Of the games closing at exactly 3, 10.2% landed on 3 and pushed.
That makes the half point on either side of 3 the most valuable half point on the board. Take a game where -3 is a fair line, so the favorite and underdog are even once pushes are set aside, and use the 10.2% push rate:
Offer on the favorite | Wins | Pushes | Loses | Expected result per $100 risked |
|---|---|---|---|---|
-2.5 at -120 | 55.1% | 0% | 44.9% | +$0.98 |
-2.5 at -125 | 55.1% | 0% | 44.9% | -$0.85 |
-3 at -110 | 44.9% | 10.2% | 44.9% | -$4.08 |
-3.5 at +100 | 44.9% | 0% | 55.1% | -$10.16 |
In this example, -2.5 stays ahead of -3 at -110 until its price passes about -135. Going the other way, -3.5 would need about +114 to match -3 at -110. A book that holds -3 but moves the price to -120 is charging for that half point, and a book still showing -2.5 at -115 is the better bet even though its price looks worse.
Away from 3 and 7, a half point isn’t worth nearly as much. Margins of nine points made up 1.7% of games in the same data, so -8.5 and -9 at the same price are close to the same bet.
The same logic runs in reverse for the underdog. A bettor on the dog wants +3.5, not +3, and +3 at -110 beats +2.5 at -105.
When two apps show the same number, compare break-even win rates. Here’s one hypothetical game, not a current line, with the favorite at -6.5 everywhere:
Where | Favorite -6.5 | Break-even | Underdog +6.5 | Break-even |
|---|---|---|---|---|
Book A | -110 | 52.38% | -110 | 52.38% |
Book B | -115 | 53.49% | -105 | 51.22% |
Book C | -108 | 51.92% | -112 | 52.83% |
Novig, pre-game | 51 cents | 51.00% | 49 cents | 49.00% |
The cheapest favorite here is the 51-cent contract, and the cheapest underdog is the 49-cent contract. Among the books, the best favorite price is Book C at -108 and the best underdog price is Book B at -105, so a bettor holding all three accounts would split the two sides between two books. A 51-cent contract converts to about -104 and a 49-cent contract to about +104. The moneyline odds guide covers that conversion and per-side shopping in more detail.
Sportsbook margins differ on average, too. Odds Reference measured NFL spread vig on closing lines from 2007 through 2022: about 3.0% at Circa, about 4.5% at DraftKings and FanDuel, and about 5.0% at BetMGM and Caesars, measured so that -110 on both sides equals 4.76%. Circa’s app works in Colorado, Illinois, Iowa, Kentucky, Missouri, and Nevada. The lowest juice NFL betting apps guide compares juice across every NFL bet type.
A spread contract pays $1 if the team covers and $0 if it doesn’t. Novig lists full-game and first-half spreads on NFL games. Kalshi lists a ladder of separate contracts for each game, written as “wins by over 2.5 points,” “wins by over 3.5 points” and so on, so each number trades at its own price.
A ladder makes the half-point math visible. On Kalshi, the gap between the “over 2.5” and “over 3.5” contracts on the same team is the market’s estimate of a three-point win plus the spread on each contract. A sportsbook shows the same thing as the price difference between its main line and an alternate line.
Fees change the converted price. These are taker prices on a spread contract at 50 cents before kickoff:
Platform | Taker cost per contract | Converts to |
|---|---|---|
Novig | 50 cents, no fee | +100 |
ProphetX | 50 cents, 2% of net winnings | About -102 |
Polymarket | 51.74 to 52.38 cents, by volume | About -107 to -110 |
Kalshi | 51.75 cents | About -107 |
Sportsbook | -110 | -110 |
Makers pay nothing on Novig or Polymarket. On Kalshi’s NFL spread contracts a maker pays a quarter of the taker rate, about 44 cents on 100 contracts bought at 50 cents.
Live spreads reprice after every possession, and the shopping window can be a few seconds. On a prediction market, takers pay a fee on in-game trades, Novig’s included, so a live spread at 50 cents costs a taker more than 50 cents. A maker whose resting order fills on Novig pays no fee, live or pre-game. Posting a price and waiting works better on a slow fourth-quarter possession than on a two-minute drill.
Accounts: two or three sportsbooks plus a prediction market give you more than one number on every game.
Number first: check for -2.5 against -3 and -6.5 against -7 before comparing prices.
Price second: turn each price into the win rate it needs, then compare the side you want to bet.
Fees: add any taker fee to a contract price, or post your own order where makers trade free.
Timing: a line can move half a point between Tuesday and kickoff. The NFL odds hub tracks where each week’s spreads sit.
Availability: sportsbooks take bets only in licensed states. The where sports betting is legal guide lists each state.
Novig requires users to be 21 and isn’t available in Arizona, Michigan, or Nevada. Its status in Ohio is unsettled after the state’s casino regulator sent it a cease-and-desist letter in October 2026.
None of them wins every game, since the best number moves from app to app week to week. Compare the number first and the price second on the side you want. Before kickoff, Novig charges no fee on spreads, so a 50-cent contract needs to win half the time.
Usually, yes. About one in seven NFL games ends on a three-point margin. When the favorite wins by exactly 3, -2.5 cashes and -3 pushes. In a game where -3 is fair, -2.5 is still the better bet at prices up to about -135.
It means risking $110 to win $100. At that price a bettor needs to win 52.38% of spread bets to break even, because the margin is built into the price.
On a prediction market, users trade with each other, so no margin is built into the price. Novig charges no fee on pre-game spreads; Kalshi, Polymarket, and ProphetX charge one.
Each sportsbook sets and moves its own line based on its own action and risk, and prediction-market prices come from users’ orders, so the same game can show -3 at one app and -2.5 at another.
Bettors must be 21 or older in most states. Gamble responsibly: if betting stops being fun, the National Problem Gambling Helpline is 1-800-MY-RESET (1-800-697-3738), and ncpgambling.org has more resources.
