Prediction markets vs sports betting comes down to who takes the other side of your bet. A sportsbook is the house: it sets the odds and builds its margin into them. A prediction market is an exchange: you buy and sell contracts with other traders, and you can sell before the game ends.
The usual pitch is that prediction markets are cheaper because there’s “no vig.” Now, that’s only partly true. On NFL moneylines and totals, the cost gap between Kalshi and FanDuel or DraftKings has shrunk to about a tenth of a percentage point. On parlays, sportsbooks are now the cheaper option. For most bettors, what you bet and how you place the order matter more than which platform you pick. Where you live also limits which products you can use at all.
| Prediction Markets | Sportsbooks | |
|---|---|---|
| Who you bet against | Other traders, often professional market-making firms | The sportsbook |
| Who sets the price | Bids and offers in an order book | The sportsbook’s traders |
| How you pay | Trading fees plus the bid-ask spread | Vig built into the odds |
| Cost on NFL straight bets | 4.28% (Kalshi) | 4.41% (FanDuel), 4.47% (DraftKings) |
| Cost on parlays/combos (same sample) | 26.5% (Kalshi) | 23.2% (FanDuel/DraftKings average) |
| Exit before the game ends | Yes, if there’s a buyer at your price | Only if the book offers cash out |
| Live betting | Order book stays open, but liquidity thins and some platforms delay retail orders | Markets suspend after key plays, and bets go through an acceptance delay |
| Bet menu | Sides, totals, futures, a growing list of props and combos, plus non-sports events | Deepest menu: player props, same-game parlays, alt lines |
| Winning accounts | No account-level limits, but contracts carry position limits | Books can cut your limits or restrict your account |
| Regulator | CFTC; state authority over sports contracts is being contested in court | State gaming regulators |
| Taxes | No IRS guidance yet; treatment varies | Gambling income; losses capped at 90% |
You trade Yes and No contracts priced from 1¢ to 99¢. Each contract pays $1 if the outcome happens and $0 if it doesn’t, so a 60¢ price implies roughly a 60% chance. You can hold until the game settles or sell earlier at whatever the next buyer will pay.
The platform makes money from trading fees, not from your losses. Your counterparty is another trader. On the biggest exchanges, that trader is often a professional market-making firm running automated pricing.
You trade Yes and No contracts priced from 1¢ to 99¢. Each contract pays $1 if the outcome happens and $0 if it doesn’t, so a 60¢ price implies roughly a 60% chance. You can hold until the game settles or sell earlier at whatever the next buyer will pay.
The platform makes money from trading fees, not from your losses. Your counterparty is another trader. On the biggest exchanges, that trader is often a professional market-making firm running automated pricing.
You bet at odds the book sets. At -110, you risk $110 to win $100. The book is your counterparty and keeps its margin whether you win or lose. Over time it also manages risk by moving lines and limiting bettors it considers sharp.
Prediction markets don’t build a margin into the price the way a sportsbook does. They charge a fee instead, and it’s largest on the most common bets. Kalshi is the biggest sports exchange by volume, and its standard taker fee is 0.07 × contracts × price × (1 − price). That peaks at 1.75¢ per contract at 50¢.
Here’s what that does to the price you actually pay when you buy at the current offer:
| Contract price | Looks like | After Kalshi’s standard taker fee |
|---|---|---|
| 30¢ | +233 | +218 |
| 50¢ | Even money | -107 |
| 60¢ | -150 | -161 |
| 70¢ | -233 | -251 |
| 80¢ | -400 | -430 |
Approximate, per contract. Kalshi rounds fees up per order, and some markets carry their own fee schedules. Other platforms price fees differently.
A 50¢ contract on an even game works out to about -107, against -110 at a sportsbook. That’s a real saving, but it’s 3 cents per $110 bet, not the 4% gap the marketing suggests.
That -107 assumes you buy at exactly 50¢. In practice you buy at the ask, the lowest price someone will sell at. On a thin market the ask might be 51¢ or 52¢:
One cent of spread erases the fee advantage. This is why your order type matters. A limit order that sits in the book until someone fills it often pays no taker fee, though some markets now charge a smaller maker fee. The catch is that a limit order might never fill.
Citizens analyst Jordan Bender tracks pricing on NFL moneylines, totals and parlays across Kalshi, FanDuel and DraftKings. His Week 4 numbers:
| Bet type | Kalshi | FanDuel | DraftKings |
|---|---|---|---|
| Straight bets (implied vig) | 4.28% | 4.41% | 4.47% |
| Parlays/combos | 26.5% | 23.2% (FanDuel/DraftKings average) |
Two things stand out. Kalshi’s edge on straight bets is about 0.13 to 0.19 percentage points, and FanDuel was actually cheaper in Week 3. During the 2025 NFL season, Kalshi was more expensive than both sportsbooks on straight bets. The gap has closed because more market makers are competing to quote prices. That can shift again.
Bottom line on cost: prediction markets are slightly cheaper on liquid straight bets if you’re careful about spreads. Sportsbooks are cheaper on parlays. Line shopping across both beats loyalty to either one.
Say you want $30 on a favorite to win an NFL game. The sportsbook has it at -160, and the prediction market shows 60¢. Numbers are illustrative and use Kalshi’s standard fee formula.
| Option | You pay | Profit if it wins | Break-even win rate |
|---|---|---|---|
| Sportsbook at -160 | $30.00 | $18.75 | 61.5% |
| Buy at 60¢ (taker): 50 contracts | $30.84 ($0.84 fee) | $19.16 | 61.7% |
| Buy at 61¢ (taker): 49 contracts | $30.71 ($0.82 fee) | $18.29 | 62.7% |
| Limit order filled at 60¢, no maker fee | $30.00 | $20.00 | 60.0% |
The 60¢ contract that looks like -150 is really about -161 after the fee, which is a wash with the sportsbook’s -160.The prediction market only wins clearly if your limit order gets filled. If you buy one cent higher, the sportsbook wins.
Where the prediction market does pull ahead is flexibility. If your team goes up 14 and the contract climbs to 80¢, you can sell your 50 contracts for about $39.44 after fees. That locks in roughly $8.60 profit with the game still going. A sportsbook might offer cash out on the same bet, but it sets the price and can pull the offer at any time.
Both products slow down live bets. They do it in different ways, and neither gives a regular bettor a speed advantage.
When something big happens, like a touchdown, a turnover or an injury, the book suspends the market, reprices it, and reopens. Even in an open market, your live bet usually sits in a short acceptance window before it’s confirmed. If the line moves during that window, the book can reject the bet or offer you the new price. Most apps have an “accept odds changes” setting that decides which of those happens.
The order book doesn’t suspend, so prices update continuously. But two things work against you:
Sportsbook delays protect the book. Exchange delays protect the market makers quoting prices, so they can update before someone watching in the stadium picks them off. The upshot is the same: if you’re betting off a TV or streaming feed, you’re already seconds behind, and both systems are built to make sure that lag doesn’t turn into an edge.
Kalshi launched parlay-style combos in late 2025, and they’ve grown fast. But they’re priced worse than sportsbook parlays (26.5% vs 23.2% in the Week 4 data). A Bloomberg analysis found regular Kalshi users lost a net $294 million on combos in 2026 before fees. That doesn’t mean combos are a scam. Parlays are expensive everywhere, but on an exchange your counterparty on a combo is usually an algorithmic trading firm.
If parlays and same-game parlays are your main bet, a sportsbook is still the better product. It has a deeper prop menu and alternate lines, its pricing on combos is somewhat better, and its same-game parlay builders are more mature. Just know that you’re paying several times the margin of a straight bet either way.
Sportsbooks can and do cut stake limits for bettors who win consistently or bet like professionals. Policies vary by operator and are rarely published.
Prediction markets don’t limit your account, because the platform earns fees whether you win or lose. Individual contracts still carry position limits set in each platform’s rules. Keep in mind who you’re trading against: firms like Susquehanna and Jump Trading are active on Kalshi. No account limits means you’re competing with professionals, not that you have an easy edge.
Sportsbook winnings are gambling income. You can now deduct gambling losses only up to 90% of your winnings, and only if you itemize. If you take the standard deduction, your losses don’t offset anything.
Prediction market winnings are taxable too, but the IRS hasn’t said how. Tax professionals currently treat them as ordinary income, capital gains, or futures contracts under Section 1256, and the treatment affects how your losses count. Kalshi doesn’t issue a complete 1099-B covering all event contract trades, so you’ll need your own records.
This isn’t tax advice. If you trade or bet in volume, talk to a tax professional before filing, especially if you use both products.
DraftKings and FanDuel both run separate prediction apps: DraftKings Predictions and FanDuel Predicts. Both launched in late 2025 and use CME Group as the exchange.
The key detail is that they offer sports contracts only in states where their sportsbook doesn’t operate: 18 states for FanDuel Predicts and 17 for DraftKings Predictions, including California, Texas and Georgia. They don’t offer sports contracts on tribal lands. Both say they’ll drop sports contracts in any state that legalizes online sports betting. Everywhere else, the apps offer only finance, economic and commodity markets.
If you already have a FanDuel or DraftKings sportsbook account, assume the prediction app is a separate account with a separate balance until you confirm otherwise.
DFS is a contest against other players, and the platform takes a cut of the entry fees. Pick’em apps pay fixed multipliers on player stat picks, while sportsbook props pay at odds that vary by line. Several pick’em apps now route picks through prediction market order books, which blurs the lines further. For the full breakdown, see prediction markets vs DFS.
They’re better for some bets and worse for others. Here’s how to decide:
The best approach for most bettors is to keep accounts on both and compare prices before every bet, the same way you’d compare sportsbook lines.
Both sides run welcome offers, but they’re structured differently. Prediction market bonuses often require a minimum trade volume rather than a single bet, so check how the bonus is paid out before you sign up.
At a sportsbook, you bet against the house at odds it sets, with its margin built in. On a prediction market, you trade contracts with other users at prices set by supply and demand, pay a trading fee, and can sell before the game ends.
On liquid straight bets, slightly. Recent NFL put Kalshi’s implied cost at 4.28%, against 4.41% at FanDuel and 4.47% at DraftKings. On parlays and combos, sportsbooks were cheaper. A one-cent bid-ask spread can wipe out a prediction market’s fee advantage.
Not built into the price. Instead they charge trading fees, and you also pay the bid-ask spread. On Kalshi, the standard taker fee peaks at 1.75¢ per contract on 50¢ contracts, which turns an even-money price into about -107.
The order book stays open, but some platforms add deliberate delays. Crypto.com delays sports orders from regular users by three seconds while exempting market makers, and Kalshi has filed for permission to delay certain orders. Sportsbooks suspend markets after key plays and hold live bets in an acceptance window before confirming them.
They don’t restrict accounts the way sportsbooks can, because they earn fees regardless of who wins. Individual contracts still have position limits.
On a prediction market, yes, if there’s a buyer at your price. At a sportsbook, only if the book offers cash out on that bet, at a price it sets.
Often, yes. That’s a major reason prediction markets have grown. But some platforms have pulled sports contracts from certain states after court rulings, and the Supreme Court may take up the question. Check each platform’s list of eligible states.
The IRS hasn’t issued guidance. Sportsbook winnings are gambling income, and starting in 2026 losses can offset only 90% of winnings if you itemize. Prediction market gains are taxable, but their treatment varies, so consult a tax professional.
Yes. DraftKings Predictions and FanDuel Predicts are separate apps that offer sports contracts only in states where those brands don’t run a sportsbook, which is 17 and 18 states respectively.
