| Platform | Currency | Min Deposit | Deposit Methods | Withdrawal Time | Fees | Max Position | KYC |
|---|---|---|---|---|---|---|---|
| Kalshi | USD | $2 | ACH, wire, debit card | 1-3 days (ACH) | $0.01/contract/side | No cap (varies) | Full (ID + SSN) |
| Polymarket | USDC | ~$1 | Crypto wallet (USDC on Polygon) | Minutes (blockchain) | Spread only (~1-2%) | No cap | None (wallet only) |
| PredictIt | USD | $5 | Credit/debit card, bank transfer | 3-5 days | 10% on profits + 5% withdrawal | $850/contract | Full (SSN required) |
| Betfair Exchange | GBP/EUR | \xc2\xa35 | Card, bank, PayPal, Skrill | 1-5 days | 2-5% commission on net profit | Varies by market | Full (ID + address) |
| Azuro (DeFi) | USDT/USDC | ~$1 | Crypto wallet | Minutes (blockchain) | ~2-3% built into odds | Pool liquidity dependent | None |
Money Changes the Game
Play-money prediction markets are fine for practice. But when real dollars are on the line, three things change. First, the information quality goes up — people research harder when they're risking their own cash. Second, the liquidity dynamics matter — you need to worry about spreads, slippage, and whether you can actually exit a position. Third, counterparty risk becomes real — who's holding your money, and what happens if they disappear?
These five platforms let you trade predictions with real money. Each uses a different currency, a different regulatory framework, and a different set of tradeoffs. We'll cover the mechanics — deposits, withdrawals, fees, limits — and then tell you what can go wrong.
1. Kalshi — USD, CFTC-Regulated, Bank Account Funded
Kalshi is the most straightforward way to trade prediction markets with real US dollars. You link a bank account, deposit via ACH (free, 1-2 business days to settle) or debit card (instant, 3% fee), and start trading.
Every contract trades between $0.01 and $0.99. If you buy "Yes" at $0.40 and the event happens, you receive $1.00 — a $0.60 profit per contract. If the event doesn't happen, you lose your $0.40. Your maximum loss is always your purchase price. No margin calls, no leverage, no surprises.
Fees are $0.01 per contract per side. Buy 100 contracts, pay $1. Sell them, pay another $1. On a $50 position, that's a 4% round-trip cost. On a $500 position, it's 0.4%. The fee structure favors larger positions.
Withdrawals go back to your bank account via ACH, typically landing in 1-3 business days. Wire withdrawals are available for larger amounts. No withdrawal fees on ACH.
Position limits vary by contract. Major political markets have high or no caps. Some newer or less liquid markets may have position limits set by the exchange. Kalshi publishes contract specifications for every market.
KYC is full — government-issued ID, SSN, and address verification. Approval takes a few hours to a few days. Once approved, you're in.
What could go wrong: Kalshi customer funds are held in segregated accounts at regulated banks. This means your money is protected even if Kalshi itself goes under — similar to how futures customer funds are protected at CME-regulated brokerages. The main risk is position risk: you can lose 100% of what you put into a contract.
2. Polymarket — USDC, Crypto-Native, Non-US Only
Polymarket runs on the Polygon blockchain. The trading currency is USDC — a stablecoin pegged 1:1 to the US dollar, issued by Circle. To trade on Polymarket, you need a crypto wallet (MetaMask, Coinbase Wallet, or similar) funded with USDC on the Polygon network.
If you're already in the crypto ecosystem, this is frictionless. Connect your wallet, approve the smart contract, and trade. If you're not, there's a learning curve: you need to buy USDC on an exchange, bridge it to Polygon, and connect your wallet to Polymarket's interface. First-timers should budget 15-30 minutes for setup.
There are no explicit trading fees. Instead, you pay the bid-ask spread — the difference between what buyers are willing to pay and what sellers are asking. On popular markets (elections, major crypto events), spreads are tight: $0.01-$0.02. On low-volume markets, spreads can blow out to $0.05-$0.10 or more.
Withdrawals are near-instant. You withdraw USDC from the smart contract to your wallet, then move it wherever you want — an exchange, another wallet, or convert to fiat. Gas fees on Polygon are negligible (under $0.01 per transaction).
No KYC. No position limits. No identity verification. You trade from a pseudonymous wallet address.
What could go wrong: Smart contract risk is the big one. Polymarket's contracts have been audited, but no audit is a guarantee. If a bug in the smart contract allows funds to be drained, there's no insurance and no FDIC protection. Oracle risk is the second concern — Polymarket uses UMA's optimistic oracle to resolve markets, and disputed resolutions can take days to settle. Finally, Polymarket explicitly blocks US users. Americans who use VPNs to access the platform risk account freezes and potential CFTC enforcement.
3. PredictIt — USD, $850 Cap, CFTC No-Action Letter
PredictIt lets you trade political predictions with real US dollars, but with training wheels on. The platform caps each trader at $850 per contract — you can't invest more than $850 in any single market position. This limit is a condition of PredictIt's CFTC no-action letter.
Funding is simple: credit card, debit card, or bank transfer. Minimum deposit is $5. The money sits in a PredictIt account — not in a segregated account at a regulated bank. This is an important distinction from Kalshi.
The fee structure is the steepest of any platform on this list. PredictIt takes 10% of your profits on every trade. Sell a contract for $0.90 that you bought at $0.50? Your $0.40 profit gets reduced by $0.04 (10%), netting you $0.36. On top of that, withdrawals carry a 5% fee. Withdraw $100 and you receive $95.
These fees add up fast. A trader who makes $1,000 in gross profits over a year will pay $100 in profit fees and another $45-$50 in withdrawal fees, effectively giving back 15% of their gains.
Withdrawals take 3-5 business days to process and arrive via the original deposit method.
KYC requires your SSN, which PredictIt uses for tax reporting (1099-MISC forms). The platform is available in all 50 US states.
What could go wrong: PredictIt's CFTC no-action letter is legally precarious. The CFTC attempted to revoke it in 2022, and while a federal court blocked that revocation, the letter could still be withdrawn. If that happens, PredictIt would need to wind down markets and return funds — a process that could take months. Your funds are also not in segregated accounts, so in a worst-case insolvency scenario, you'd be an unsecured creditor.
4. Betfair Exchange — GBP/EUR, UK-Regulated, Deep Liquidity
Betfair is the world's largest betting exchange, operating since 2000. The exchange model works identically to a prediction market: you buy and sell contracts representing outcomes, with prices reflecting implied probabilities. Betfair just calls them "bets" instead of "contracts."
Funding options are extensive: debit/credit cards, bank transfer, PayPal, Skrill, Neteller, and Paysafecard. Minimum deposit is \xc2\xa35 (or equivalent). The platform operates primarily in GBP and EUR, with some markets available in AUD.
Betfair charges a commission on net profits per market — typically 2% for high-volume traders and up to 5% for casual users. This is calculated per market, not per trade, which means you only pay commission on your net winnings in each individual market. If you lose money on a market, you pay nothing.
The exchange offers deep liquidity on political markets, particularly UK and European elections. The 2024 US presidential election attracted significant Betfair volume from non-US traders. Sports and entertainment markets are also heavily traded.
Withdrawals take 1-5 business days depending on the method. Card withdrawals are fastest. Bank transfers take longest.
KYC is mandatory — UK Gambling Commission rules require identity verification, address proof, and source of funds documentation for larger accounts.
What could go wrong: Betfair is regulated by the UK Gambling Commission, which provides strong consumer protections including mandatory segregation of customer funds. The main risk is market risk — you can lose your entire position. Betfair does not accept US customers and hasn't since 2010.
5. Azuro and DeFi Prediction Protocols — Crypto-Native, Fully Decentralized
Azuro is a decentralized prediction market protocol running on multiple blockchains (Polygon, Gnosis Chain, Arbitrum). Unlike Polymarket, which has a centralized front-end and team, Azuro is a protocol — a set of smart contracts that anyone can build an interface on top of.
Trading uses USDT or USDC. You connect a crypto wallet, deposit stablecoins into the protocol's liquidity pools, and trade against the pool rather than against other users. This automated market maker (AMM) model means there's always liquidity available, but the odds adjust based on pool imbalance.
Fees are built into the odds — typically a 2-3% margin embedded in the pricing, comparable to Polymarket's spreads.
No KYC. No geographic restrictions at the protocol level (individual front-ends may impose their own). No position limits beyond available pool liquidity.
Withdrawals are blockchain-native: send your tokens from the smart contract to your wallet. Settlement happens on-chain. Resolution uses a combination of oracle feeds and dispute mechanisms.
Other DeFi prediction protocols worth knowing: PlotX (Polygon-based, lower volume), Hedgehog Markets (Solana-based, limited markets), and Thales (Optimism-based, focused on crypto price predictions).
What could go wrong: Everything that can go wrong with DeFi applies here. Smart contract vulnerabilities, oracle manipulation, bridge exploits, and rug pulls are all real risks. There's no customer service, no FDIC insurance, and no regulatory backstop. Funds lost to smart contract bugs are gone permanently. DeFi prediction markets are for crypto-native users who understand and accept these risks.
Risk Disclosure: What You Need to Know
Before you fund any prediction market account, understand these risks.
You can lose 100% of your position. Prediction market contracts are binary. If you buy "Yes" at $0.80 and the event doesn't happen, you lose $0.80 per contract. There is no partial loss — you win or you lose the full amount. This is different from stock investing, where prices fluctuate gradually.
These are not FDIC-insured deposits. Money in your Kalshi, PredictIt, Polymarket, or Betfair account is not covered by deposit insurance. Kalshi's segregated accounts provide structural protection, but the other platforms offer varying levels of fund safety.
Liquidity risk is real. You might buy a contract and find that there's no one willing to buy it from you before resolution. On illiquid markets, you may be stuck holding until the event resolves. This matters if you want to exit a position early — you need a counterparty, and on thin markets, that counterparty may not exist at a fair price.
Tax obligations exist. Prediction market profits are taxable in the US (and most other jurisdictions). The specific tax treatment varies by platform and is not fully settled by the IRS. Keep detailed records and consult a tax professional.
Don't trade money you can't afford to lose. This is the single most important sentence in this article. Prediction markets are speculative instruments. Treat them like any other high-risk investment: size your positions appropriately, diversify, and never bet the rent money.