Why Fees Matter in Prediction Markets
Fees are one of the most overlooked factors when choosing a prediction market platform. Even small differences in fee structures can significantly impact your returns, especially if you're an active trader.
Consider this: if you're trading with a 2% edge and the platform charges 2% in fees, you're breaking even. Understanding the full fee picture is crucial for profitability.
Types of Fees
Before we compare platforms, let's understand the different types of fees you'll encounter:
Trading Fees
These are charged when you buy or sell shares. They can be:
- Fixed percentage: A flat percentage on each trade (e.g., 1%)
- Spread-based: Built into the buy/sell price difference
- Tiered: Lower fees for higher volume traders
Withdrawal Fees
Charged when you move money out of the platform:
- Fiat withdrawals: Bank transfer fees, typically $5-25
- Crypto withdrawals: Network gas fees, varies by blockchain
- Processing time: Some platforms charge for faster withdrawals
Resolution Fees
Some platforms charge a fee when a market resolves:
- Winner's fee: A percentage deducted from your winnings
- Platform fee: A flat fee regardless of outcome
Hidden Costs
- Spread: The difference between buy and sell prices (wider spread = higher cost)
- Slippage: Price movement between placing and executing your order
- Currency conversion: If depositing in a different currency
Platform Fee Comparison
Polymarket
| Fee Type | Amount |
|---|---|
| Trading Fee | 0% (no trading fees) |
| Spread | Market-dependent (typically 1-3%) |
| Withdrawal Fee | Network gas fees only (~$0.01 on Polygon) |
| Resolution Fee | None |
| Min Deposit | None |
Verdict: Polymarket's zero trading fee model is incredibly competitive. The main cost is the spread, which varies by market liquidity. Popular markets like elections have tight spreads (1-2%), while niche markets can have wider spreads (5-10%).
Kalshi
| Fee Type | Amount |
|---|---|
| Trading Fee | $0.01-0.07 per contract (tiered) |
| Spread | Set by market makers |
| Withdrawal Fee | Free (bank transfer) |
| Resolution Fee | None for losing trades, 1¢ per contract for winning trades |
| Min Deposit | $1 |
Verdict: Kalshi's fee structure is transparent and reasonable. The per-contract fee is small, and free bank withdrawals are a big plus. The winner's fee of 1¢ per contract is minimal.
Drift Protocol
| Fee Type | Amount |
|---|---|
| Trading Fee | 0.05% - 0.1% |
| Spread | AMM-based (typically 0.5-2%) |
| Withdrawal Fee | Solana network fees (~$0.001) |
| Resolution Fee | None |
| Min Deposit | None |
Verdict: Drift benefits from Solana's low gas fees, making it one of the cheapest options for frequent traders. The trading fee is minimal, and the AMM-based spread is generally tight for popular markets.
Hedgehog Markets
| Fee Type | Amount |
|---|---|
| Trading Fee | 1% |
| Spread | AMM-based (2-5%) |
| Withdrawal Fee | Solana network fees |
| Resolution Fee | None |
| Min Deposit | None |
Verdict: Hedgehog's 1% trading fee is moderate. The main advantage is their no-loss prediction model, which changes the fee calculation since you can't lose your principal.
Manifold Markets
| Fee Type | Amount |
|---|---|
| Trading Fee | 0% |
| Spread | Market-dependent |
| Withdrawal Fee | N/A (play money) |
| Resolution Fee | None |
| Min Deposit | Free starting balance |
Verdict: Free! But it's play money, so there's no real financial return either.
PredictIt
| Fee Type | Amount |
|---|---|
| Trading Fee | 5% of profits |
| Spread | Market-dependent |
| Withdrawal Fee | 5% of withdrawal |
| Resolution Fee | Included in profit fee |
| Min Deposit | $5 |
Verdict: PredictIt has the highest fees in the industry. A 5% profit fee plus a 5% withdrawal fee makes it very expensive. Combined with the $850 per-market limit, it's hard to justify unless it's your only option.
Fee Comparison Summary
| Platform | Trading Fee | Withdrawal Fee | Best For |
|---|---|---|---|
| Polymarket | 0% | ~$0.01 | Lowest cost overall |
| Drift | 0.05-0.1% | ~$0.001 | Frequent traders |
| Kalshi | $0.01-0.07/contract | Free | US-based traders |
| Hedgehog | 1% | ~$0.001 | Conservative traders |
| Manifold | 0% | N/A | Learning (play money) |
| PredictIt | 5% of profits | 5% | Avoid if possible |
How to Minimize Fees
Choose high-liquidity markets: Tighter spreads mean lower effective costs. Stick to popular markets with high trading volume.
Trade in bulk: Some platforms offer volume discounts. Kalshi's tiered pricing rewards active traders.
Use the right blockchain: If using DeFi platforms, Solana-based options (Drift, Hedgehog) have much lower gas fees than Ethereum-based ones (Augur).
Hold to resolution: Buying and holding until resolution avoids paying the spread twice (on entry and exit).
Compare effective costs: Don't just look at the headline fee. Calculate the total cost including spread, gas, and withdrawal fees for your typical trade size.
Our Recommendation
For most traders, Polymarket offers the best fee structure with zero trading fees and minimal withdrawal costs. If you're US-based and need a regulated option, Kalshi provides a transparent and reasonable fee model.
For frequent DeFi traders, Drift Protocol on Solana offers some of the lowest all-in costs thanks to Solana's minimal gas fees.
Avoid PredictIt if you have alternatives — its 5% + 5% fee structure makes profitable trading extremely difficult.
Check out our complete platform ranking for a comprehensive comparison beyond just fees.
