Every platform below is a venue for speculation. You can lose 100% of what you deposit. Most retail accounts lose money over time. Only fund an account with cash you can afford to lose entirely, and confirm the platform is legal in your state before you deposit a dollar.
Why there are suddenly three of everything
Event contracts — binary "Yes/No" markets that pay $1.00 if something happens and $0.00 if it doesn't — went mainstream after the 2024 election, and by 2026 the field has split into two camps: regulated exchanges (Kalshi), sports-brand entrants (DraftKings Predictions, FanDuel Predicts), and crypto-native markets (Polymarket). They look similar on the surface and behave very differently underneath. Here's how the big three compare.
Kalshi — the regulated, nationwide option
- What it is: A CFTC-regulated Designated Contract Market (DCM) — the same federal framework that governs futures exchanges like the CME.
- Where: Available nationwide (all 50 states), including states that don't permit traditional sports betting — a major reason it grew fast.
- Cost: Charges roughly 7% on winnings only — an explicit number you can price into your expected value before you enter a trade. It profits when people trade more, regardless of who wins.
- Money & taxes: USD deposits; 1099-style tax reporting.
- Best for: Beginners who want US regulation, dollar deposits, clean tax paperwork, and access regardless of state betting laws.
DraftKings Predictions — the familiar sports-brand experience
- What it is: A prediction-market product from the sportsbook giant, aimed at users who want a familiar, sports-first interface.
- Where: Roughly 20 states — far fewer than Kalshi's nationwide footprint.
- Cost: This is the key catch — DraftKings embeds its margin in the spread between the Yes and No price, so you pay it on every contract whether you win or lose. Unlike Kalshi's explicit 7%-on-winnings, this cost is baked in and easy to overlook.
- Best for: Existing DraftKings users in supported states who value brand familiarity — but you must learn to read the spread as a cost.
A platform advertising "no commission" usually just moved the cost into the spread. Kalshi's 7%-on-winnings is visible; a spread cost is invisible but paid on every trade, win or lose. Always compare the actual buy price of the identical contract across platforms — that comparison, not the marketing, tells you where your money leaks.
Polymarket — the deepest, cheapest, most global (and most complex)
- What it is: A decentralized prediction market built on the Polygon blockchain, founded in 2020. It shot to fame during the 2024 US election, when its markets drew hundreds of millions in volume and were cited by media as a real-time probability gauge.
- Strengths: The world's largest prediction market — the most categories, the deepest liquidity, the lowest fees, and generally the tightest spreads on political and macro markets.
- Money & taxes: Settles in USDC (a stablecoin) on-chain; gains generally get capital-gains treatment. You need a crypto wallet and an understanding of self-custody.
- The catches: US regulatory access has its own history, and Polymarket has faced scrutiny over alleged deceptive marketing. The crypto layer adds real complexity — wallets, gas, and the risk of losing funds to your own mistakes.
- Best for: Experienced users comfortable with crypto who want maximum depth, the widest markets, and the lowest fees.
Side-by-side
- Regulation: Kalshi (CFTC-regulated) > DraftKings (state-licensed) > Polymarket (decentralized/crypto).
- State access: Kalshi (50) > DraftKings (~20) > Polymarket (crypto access, varies).
- Cost transparency: Kalshi (explicit 7% on winnings) is the easiest to price; DraftKings (spread) and Polymarket (fees + gas) require more work.
- Liquidity/depth: Polymarket > Kalshi > DraftKings for most non-sports markets.
- Ease for beginners: Kalshi and DraftKings (USD, familiar) > Polymarket (crypto learning curve).
Serious traders keep accounts on more than one platform, because the same event is often priced differently across venues. Those 2–5% gaps are the basis of cross-platform arbitrage — buying "Yes" cheap on one and "No" on another so the two legs total less than $1. We cover exactly how that works in the prediction-market strategy guide.
Don't forget taxes
Net gains are taxable everywhere. Kalshi issues 1099-style forms; Polymarket's crypto settlement means capital-gains tracking on your own. Keep every statement, log every position, and set aside part of any winnings. Size the bill with our side hustle tax calculator, and if it becomes steady income, the quarterly tax estimator keeps you penalty-free.
Bottom line
For most beginners in 2026, Kalshi is the cleanest entry — nationwide, regulated, transparent fees, real tax forms. DraftKings Predictions suits existing sportsbook users in supported states who can read the spread as a cost. Polymarket rewards experienced, crypto-comfortable traders with unmatched depth and the lowest fees. Whichever you pick, the platform is just the venue — your results come from discipline and math, covered in the strategy guide. See how these markets moved in real events in our World Cup and NBA Finals breakdowns, and find lower-risk income in the gig finder.