Fee Comparison
Detailed fee structures and cost analysis across all platforms with real-world examples.
Fees
Platform Fee Comparison
Fees range from 0.10% to 4%+ depending on the model. More than 1000x difference between the cheapest and most expensive platform in the industry.
Average Fee (% of trade)
Fee Models
Formula-based (Kalshi)
0.07 × contracts × price × (1-price). Maximum at 50/50, minimum at extremes. Most complex model.
$35 on $1000 at 50/50Fixed taker (Polymarket US)
0.10% of trade volume. Simplest and cheapest model for large positions.
$1 on $1000Dynamic (Limitless, Opinion)
Fee increases as resolution approaches. Rewards early participants.
0.03% → 3% at resolution% of profit (SX Bet)
Fee only from winner: 4% of profit (2.6% oracle + 1.4% affiliate).
$4 from $100 profitAMM (Gnosis Omen)
2% AMM fee, distributed among liquidity providers.
$20 on $1000Real costs at $10,000 position (contract price $0.76)
| Platform | Fee | Fee Type | Cost per $1 Win | Rating |
|---|---|---|---|---|
| Polymarket US | $9.99 | 0.10% taker | $0.7608 | Best |
| Opinion Labs | $49.75 | Dynamic | $0.7639 | Excellent |
| Limitless | $147.78 | Dynamic | $0.7716 | Good |
| Kalshi | $165.24 | Formula | $0.7728 | Fair |
| SX Bet | ~$160 | 4% of profit | ~$0.77 | Fair |
| Gnosis Omen | $200 | 2% AMM | $0.78 | Fair |