You've been betting on games for years. DraftKings, FanDuel, BetMGM — you know the drill. Pick a side, take the odds, watch the game, collect (or lose). Now everywhere you look — Super Bowl ads, CNN segments, your Robinhood app — there's this thing called "prediction markets" and everyone says it's the future of sports betting. Except the people who run them insist it's not sports betting at all.
So what's actually different? Is this just betting with extra steps? Or is there a real reason millions of sportsbook users are opening Kalshi and Polymarket accounts?
Here's the honest breakdown — from someone who uses both.
The One-Sentence Version
At a sportsbook, you bet against the house. On a prediction market, you trade against other people. That single difference changes everything — pricing, payouts, flexibility, availability, and legality.
The Same Bet, Two Different Worlds
Let's use a real example to make this concrete.
The game: Lakers vs. Celtics, tonight. You think the Lakers win.
At DraftKings (Sportsbook)
The moneyline is Lakers +150 / Celtics -180. You bet $100 on the Lakers at +150. If they win, you get $250 back ($100 stake + $150 profit). If they lose, you're out $100. The odds were set by DraftKings' oddsmakers. Built into those odds is the vig — roughly 4-5% margin that guarantees DraftKings profits over time regardless of which team wins. Once you place the bet, you're locked in. Maybe there's a cash-out button, but it's priced in DraftKings' favor.
On Kalshi (Prediction Market)
The contract "Lakers win tonight" is trading at YES $0.40 / NO $0.60. You buy 250 YES contracts at $0.40 each — total cost $100. If the Lakers win, each contract settles at $1.00. You receive $250 — same $150 profit as DraftKings. If they lose, your contracts settle at $0. You lose $100.
So far, identical outcome. But here's where it diverges.
Halftime. Lakers are up 15. On DraftKings, your bet is still locked in at the original odds. On Kalshi, the YES price has jumped to $0.78. You can sell your 250 contracts right now for $195 — a $95 profit — without waiting for the final whistle. Or you can hold and hope for the full payout.
The vig. DraftKings' -180/+150 line implies combined probabilities of about 104.5%. That extra 4.5% is the house edge. On Kalshi, the YES $0.40 + NO $0.60 = $1.00 exactly. There's no built-in margin. The platform charges a small fee per trade instead (~$0.02 per contract).
The counterparty. When you bet on DraftKings, DraftKings is on the other side. If you win too much, they can limit your account, reduce your max bets, or close you out entirely. On Kalshi, you're trading against another user who thinks the Celtics will win. The exchange is neutral — it just matches orders and charges a fee. Prediction market platforms explicitly welcome winning traders — there's no house to beat.
The Seven Key Differences
1. Who You're Playing Against
Sportsbook: You vs. the house. The operator sets odds, takes the other side of your bet, and profits from the built-in margin. If you're consistently profitable, you're taking money from the operator — and they can (and do) limit or ban you.
Prediction market: You vs. other traders. The exchange matches buyers and sellers through an order book, like a stock exchange. The platform is neutral and profits from trading fees. Your winning doesn't cost the platform anything — so they have no incentive to limit you. See how prediction markets work for a deeper explanation of the exchange model.
2. How Prices Are Set
Sportsbook: Oddsmakers set the lines. Algorithms, sharp money, and manual adjustments determine the odds. The operator controls pricing and builds in margin (the vig). Standard vig on a -110/-110 line is about 4.55%. On heavy favorites or props, it can be 6-10%+.
Prediction market: Traders set the prices. Supply and demand on the order book determine the contract price at any moment. If more people buy YES, the price goes up. If more sell, it goes down. The pricing is tighter — typically 1-2% total spread versus 4-10% vig at a sportsbook. No oddsmaker is in the loop.
3. Can You Sell Your Position?
Sportsbook: Generally no. Once you bet, you're locked in until the event resolves. Some sportsbooks offer cash-out, but it's priced to benefit the operator (they're buying back your bet at a discount). You can't set your own exit price.
Prediction market: Yes, at any time. You can sell your contracts on the open market at whatever price other traders are willing to pay. If the game is going your way, sell for profit at halftime. If it's going badly, sell to cut your loss. You can even set a limit order at a specific exit price and wait. This is the single biggest functional difference — and it's what makes prediction markets feel more like trading than betting.
4. What You Can Bet On
Sportsbook: Primarily sports. Game outcomes, spreads, totals, player props, futures, parlays. Some sportsbooks offer novelty bets (Oscars, elections in a few states), but the catalog is 95%+ sports.
Prediction market: Everything. Sports, politics, economics, crypto, weather, culture, technology, entertainment — any real-world event with a verifiable outcome. You can trade the Fed rate decision at 8:30 AM, the Lakers game at 7:30 PM, and whether it'll snow in New York tomorrow — all on the same platform. See our best prediction market apps guide for what each platform covers.
5. Where It's Legal
Sportsbook: Requires state-level gambling licenses. Legal in approximately 38 states + DC. Not available in California, Texas, Florida, and other large-population states without legal sports betting.
Prediction market: Operates under federal CFTC regulation. Available in all 50 states for non-sports contracts. Sports contracts available in most states but restricted in some due to ongoing state-vs-federal legal battles. For the ~100 million Americans in states without legal sportsbooks, prediction markets are currently the only legal way to trade on sports outcomes.
This is the single biggest reason prediction markets have exploded. They cracked open California, Texas, and Florida.
6. Age Requirements
Sportsbook: 21+ in most states (some allow 18+).
Prediction market: 18+ on all major platforms. Proposed federal legislation (Blumenthal-Kim bill) would raise this to 21, but it hasn't passed.
7. How You're Taxed
Sportsbook: Gambling income. Reported on Form W-2G for large payouts. Losses deductible only if you itemize, capped at winnings. Starting 2026, the 90% loss cap under OBBBA creates potential for phantom taxable income.
Prediction market: Unclear. The IRS hasn't issued specific guidance. Most platforms report as ordinary income (1099-MISC). Some tax advisors argue for Section 1256 treatment (60/40 capital gains split). See our full prediction market tax guide for the three possible approaches and what tax professionals actually recommend.
The Vig Problem: Why Prediction Markets Are Cheaper
This deserves its own section because it's the financial argument that matters most to serious bettors.
At a standard sportsbook, a typical NFL spread is priced at -110 on both sides. That means the implied probability for each side is 52.38%, totaling 104.76%. The extra 4.76% is the vig — money that goes to the house regardless of outcome. To break even betting at -110, you need to win 52.38% of your bets. Anything below that, you're losing money even if your picks are better than a coin flip.
On a prediction market exchange, the equivalent contract might trade at YES $0.50 / NO $0.50 — totaling $1.00 exactly. There's no embedded margin. The platform charges a flat fee per trade: $0.02 per contract on Kalshi or Robinhood, or 0.10% on Polymarket. On a $100 bet at even odds, you're paying roughly $0.50-$4.00 in fees versus $4.55 in vig at a sportsbook.
Over thousands of bets, this cost difference compounds enormously. A trader making $100,000 in annual volume saves thousands of dollars in friction costs on a prediction market versus a sportsbook. This is why sharp bettors — the kind sportsbooks kick out — are migrating to prediction markets. The exchange doesn't care if you win.
When Sportsbooks Are Actually Better
Prediction markets aren't superior in every way. Here's where traditional sportsbooks still win:
Live betting depth. Sportsbooks offer hundreds of in-play markets per game — live spreads, next scorer, drive result, quarter lines. Prediction markets have basic live trading (contract prices move during games), but the variety and granularity of live props is still far behind.
Established props catalog. Sportsbooks have years of player prop infrastructure — anytime touchdown, passing yards over/under, first basket. Prediction markets are catching up (especially on Kalshi and OG), but the props depth at a top sportsbook is still wider.
Same-game parlays. Sportsbooks let you build complex SGPs with correlated outcomes — a feature that prediction markets are just starting to develop. Robinhood offers custom combos up to 10 legs, but the flexibility and pricing don't yet match what DraftKings or FanDuel offer.
Bonuses and promotions. Sportsbooks compete aggressively on sign-up bonuses, deposit matches, odds boosts, and loyalty rewards. Prediction market promotions are more modest — OG's 5x profit boosts are among the most generous, and Kalshi periodically runs promo codes, but the industry doesn't match sportsbook-level incentives.
Familiarity. American odds (-110, +150) are the language sportsbook users think in. Prediction market pricing (contract at $0.40) requires a mental translation. Some people find the contract-price model intuitive; others find it unnecessarily confusing. Sportsbook interfaces are built for bettors. Prediction market interfaces are built for traders.
Customer support. Major sportsbooks have live chat, phone support, and years of customer service infrastructure. Prediction markets are newer and support options are generally more limited.
When Prediction Markets Are Better
No user limits. If you're a winning bettor who's been limited or banned by sportsbooks, prediction markets are built for you. There's no house to beat — the exchange is neutral.
Sell any position any time. The ability to exit a bet before the event resolves, at the market price, fundamentally changes risk management. You can take profit early, cut losses, or hedge mid-game. Sportsbooks don't offer this flexibility.
Tighter pricing. No vig. Trading fees are a fraction of the built-in sportsbook margin. Over volume, this saves real money.
50-state access for most contracts. If you live in California, Texas, or another state without legal sportsbooks, prediction markets are legal under federal CFTC regulation for most contract types.
Beyond sports. You can trade Fed rate decisions, election outcomes, weather, crypto prices, and cultural events alongside your sports positions — all on one platform.
Interest on idle cash. Kalshi pays ~4% APY on uninvested balances. No sportsbook does this.
Arbitrage between platforms. Because multiple exchanges exist for the same events, price differences create near-risk-free profit opportunities. This doesn't exist in the sportsbook world in the same way.
Can You Use Prediction Market Odds to Beat Sportsbooks?
Yes — and smart bettors already do this.
Prediction market prices are real-time probability estimates driven by thousands of traders with money on the line. When a Polymarket contract trades at $0.60, the crowd is saying there's a 60% chance that outcome happens. When your sportsbook prices the same outcome at -120 (implied probability 54.5%), there's a 5.5% gap between the sportsbook's implied probability and the market's estimate.
If you trust the prediction market's probability estimate, the sportsbook is offering you a +EV (positive expected value) bet — you're getting odds that are better than the true probability. This kind of cross-referencing is becoming standard practice for sophisticated bettors.
You can track prediction market probabilities in real time using Dune Analytics dashboards or directly on the platforms themselves.
The Industry Is Converging
The line between sportsbooks and prediction markets is blurring — fast.
DraftKings launched DraftKings Predictions in December 2025, operating its own CFTC-licensed exchange (Railbird). FanDuel partnered with CME Group to launch FanDuel Predicts. Fanatics Markets entered through Crypto.com's exchange. These sportsbook operators are building prediction market products because they see which way the wind is blowing — and because prediction markets let them operate in states where their sportsbook licenses don't reach.
From the other side, prediction markets are adding sportsbook-like features: player props, parlays, live trading, mobile-first interfaces. Kalshi now handles over $1 billion in Super Bowl trading. OG has built-in community chat and leaderboards that feel like a social sportsbook.
Within a few years, the distinction may not matter. The exchange model (no vig, peer-to-peer, sell any time) and the sportsbook model (familiar interface, deep props, generous promos) will merge into hybrid platforms. Robinhood is already acquiring its own exchange to do exactly this. The question isn't whether you should use one or the other — it's whether you're ready for the exchange model before it becomes the default.
How to Switch: Practical Steps
If you're a sportsbook user ready to try prediction markets:
Step 1: Read our quick guide on how prediction markets work. The mechanics take 5 minutes to understand.
Step 2: If you have a Robinhood account, start there — Robinhood integrates prediction markets into the app you already use. If not, create a Kalshi account and use the free demo to practice.
Step 3: Deposit $50-$100 via ACH (free on every platform). Start with sports markets you already follow — you already have the edge of domain knowledge.
Step 4: Try selling a position before the event resolves. This is the "aha moment" for most sportsbook converts — the ability to take profit or cut losses mid-game changes everything.
Step 5: Compare pricing. Check the prediction market price on a game, then look at the equivalent sportsbook odds. See the vig difference for yourself.
Step 6: Explore beyond sports. Trade one Fed rate decision or one election market. You might find you have more edge in economics or politics than you do in sports.
For a comprehensive ranking of every platform, see our best prediction market apps guide. For sports-specific rankings, see best prediction markets for sports betting.
Frequently Asked Questions
Are prediction markets just sports betting with a different name?
No. The underlying mechanics are fundamentally different. Sportsbooks set odds and take the other side of your bet. Prediction markets operate as exchanges where traders set prices and trade with each other. You can sell positions before events resolve, there's no house edge in the pricing, and prediction markets cover far more than sports.
Are prediction markets legal where sportsbooks aren't?
Yes, in many cases. Prediction markets operate under federal CFTC regulation and are available in all 50 states for most contract types. Sports-specific contracts face restrictions in some states. But for the ~100 million Americans in states without legal sportsbooks, prediction markets are the primary legal alternative. See our full legal guide.
Will sportsbooks limit me for winning on prediction markets?
No. Prediction market exchanges don't limit or ban winning traders because the exchange itself isn't exposed to the outcome. The platform earns fees on trades, not from your losses. This is the opposite of the sportsbook model.
Can I parlay on prediction markets?
Yes, on some platforms. Kalshi offers "Build Your Combo." Robinhood offers custom combos up to 10 legs. OG supports parlays. Polymarket does not currently offer a combo feature.
Is the pricing actually better on prediction markets?
For most bets, yes. The absence of vig means the implied probabilities on prediction markets are tighter (closer to true probability) than sportsbook odds. On a standard -110/-110 line, the sportsbook takes ~4.55%. On a prediction market, you pay $0.02-$0.04 per contract in fees. Over volume, this saves significant money.
Can I use both prediction markets and sportsbooks?
Absolutely. Many sophisticated bettors use prediction markets as a pricing reference — if the prediction market says 60% probability and the sportsbook is offering +150 (implied 40%), that's a value play. Having accounts on both gives you more opportunities to find the best price.
Which platform should I start with?
If you already have Robinhood: Robinhood (zero-friction setup). If you want the best sports catalog: Kalshi. If you want the lowest fees: Polymarket. If you want community and social features: OG. See our best prediction market apps for the full breakdown.
How are prediction market winnings taxed compared to sportsbook winnings?
Sportsbook winnings are classified as gambling income (W-2G, losses deductible only if itemized). Prediction market tax treatment is unsettled — the IRS hasn't issued specific guidance. Most platforms report as ordinary income (1099-MISC). See our prediction market tax guide for the three possible classifications and what to do now.
Do prediction markets have live betting?
Sort of. Contract prices update in real time during events, and you can buy or sell at any point. But the variety of live markets (next scorer, drive result, quarter lines) is much less developed than what top sportsbooks offer. This gap is closing but hasn't closed yet.
Will prediction markets replace sportsbooks?
Not entirely — but the models are converging. DraftKings and FanDuel are launching prediction market products. Prediction platforms are adding sportsbook-like features. The exchange model (no vig, peer-to-peer) will likely become the standard for price-sensitive traders, while sportsbooks will continue to serve entertainment-focused casual bettors with bonuses, live betting, and familiar interfaces.
