Prediction markets vs sportsbooks for Steelers games: where the price comes from
A sportsbook builds its margin into both sides; an exchange matches traders and charges a fee, or none. What that means for $100 on the Steelers.
Two very different kinds of venue put a price on every Steelers game. They arrive at that price from opposite directions, and the difference shows up in what a winning position pays. Pennsylvania is one of the states where a fan can open both kinds, so the comparison is a practical one.
How a sportsbook prices a game
A sportsbook is the other side of every ticket. It writes the line, takes the risk and protects itself by shading both prices. A game it rates as a true coin flip does not go up at +100 each way; it goes up at -110 each way. Turn those two prices into probabilities and they add to about 104.8%. The extra is the book's margin, the vig or the hold, and it is in place before kickoff.
You never see it as a charge. It lives inside the odds. DraftKings' moneyline for the Steelers' next game, at Cincinnati on Nov. 15, was Bengals -180 and Steelers +150 as ESPN listed it on Friday afternoon. Converted, those prices add to 104.3%: a hold of about 4.3% before anyone has taken a side.
How an exchange prices a game
A prediction market does not take sides. It matches them. A trader who thinks Pittsburgh wins is paired with one who thinks it loses, and the price is wherever their orders meet, quoted in cents as a probability. A Steelers contract at 38 cents pays $1 if the Steelers win. With no house position to protect, nobody has a reason to shade the line, and the two sides of a busy market usually add to within a cent or two of $1.
The exchanges earn their money in different ways:
- Novig charges no fee on pre-game straight trades on its app or website. Live (in-game) trades that take a resting order pay a taker fee that scales with price, 0.06 × price × (1 − price) per contract in every league, and traders whose resting orders are filled pay nothing, per Novig's fee schedule.
- Kalshi charges takers a fee scaled by price on a 7% rate. It is largest on a coin flip and shrinks as one side becomes a heavy favorite.
- Polymarket US sets its own fees by market; check its schedule before trading.
One Steelers position, four returns
Suppose the Steelers trade at 38 cents on an exchange, close to the 38.4% DraftKings' line implies once its margin is stripped out.
| Venue | Quote | Profit on a winning $100 |
|---|---|---|
| Exchange, no fee (Novig pre-game) | 38¢ (about +163) | $163.16 |
| Exchange, NFL live taker fee (Novig in-game) | 38¢ | $158.35 |
| Exchange, 7% fee rate (Kalshi) | 38¢ | $152.21 |
| Sportsbook (DraftKings, Friday afternoon) | +150 | $150.00 |
At the same 38-cent price, Kalshi's fee costs $10.95 of profit per $100 against a no-fee trade. The sportsbook takes its margin by moving the price instead, and on an underdog that margin is large: +150 pays $13.16 less than a fair 38-cent contract. The exchange prices here are an illustration, not a quote; the board runs the same calculation on live prices for every Steelers game and sorts each side from best return to worst. How to read the Steelers board walks through the formula.
What Pennsylvania allows
The Pennsylvania Gaming Control Board authorizes 11 online sportsbooks, so the DraftKings, FanDuel, BetMGM, bet365, BetRivers, Fanatics and theScore Bet rows on the board are prices a fan in Pittsburgh can actually take, at 21 and over. Those books answer to the state, pay its tax and follow its advertising and responsible-gaming rules.
The exchanges are regulated federally by the Commodity Futures Trading Commission rather than by the Gaming Control Board. Novig, Kalshi and Polymarket US all serve the state, and two House bills that would bring them under state rules, HB 2497 and HB 2711, are still in committee. Pennsylvania sports betting in 2026 has the detail, and the Pennsylvania page prices this week's games only at the venues a fan in the state can open.
Novig is available in 47 states; it is not offered in Arizona, Michigan or Nevada. None of those is on the Steelers' schedule this season. What new traders get on sign-up is on the Novig offer page.
What "no fee" does not promise
No fee is not a guarantee of a better price. On an exchange the price comes from other traders and moves with them, and a thin market can show a wider gap between the best buy and the best sell than a sportsbook's built-in margin. When that happens it shows on the board, because the hold column measures every venue's two sides the same way. A Sunday night game between two AFC North contenders should draw plenty of volume, but the board does not take that on faith; it measures it on every refresh.
This site is for readers 21 and older. If gambling stops being fun, call 1-800-GAMBLER.
