Fee-Adjusted Returns
Calculate your real net return after all platform fees, deposit costs, withdrawal fees, and interest across Kalshi, Polymarket, Crypto.com, FanDuel, and DraftKings. See which platform maximizes your take-home profit.
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Position: 100 YES @ 50¢Cost: $50.00Max Payout: $100.00
| Platform | Gross P&L | Trade Fee | Deposit | Withdraw | Interest | NET | Eff. Odds | ROI |
|---|---|---|---|---|---|---|---|---|
| Polymarket USBEST | +$50.00 | -$0.05 | $0.00 | $0.00 | $0.00 | +$49.95 | 1.998 | +99.9% |
| Kalshi | +$50.00 | -$2.00 | $0.00 | $0.00 | $0.00 | +$48.00 | 1.923 | +96.0% |
| Crypto.com / CDNA | +$50.00 | -$2.00 | $0.00 | $0.00 | $0.00 | +$48.00 | 1.923 | +96.0% |
| FanDuel Predicts | +$50.00 | -$2.00 | $0.00 | $0.00 | $0.00 | +$48.00 | 1.923 | +96.0% |
| DraftKings Predictions | +$50.00 | -$2.00 | $0.00 | $0.00 | $0.00 | +$48.00 | 1.923 | +96.0% |
About Fee-Adjusted Returns
Raw contract prices tell only half the story. Trading fees, deposit costs, withdrawal fees, and even interest earned on idle balances all affect your actual return. This tool calculates the true net take-home across all five major prediction market platforms so you can choose where to trade for maximum profit. Effective odds show what your after-fee decimal odds really are.
Frequently Asked Questions
What fees are included in the fee-adjusted return calculation?
This calculator includes four fee categories: trading fees (charged when you buy or sell a contract), deposit fees (charged when funding your account), withdrawal fees (charged when moving money out), and interest earned on idle balances. Each platform handles these differently.
Why does the best platform change depending on the contract price?
Each platform uses a different fee structure. Kalshi charges fees proportional to price variance, Polymarket uses a flat percentage, and DraftKings charges a fixed per-contract fee. At low prices, percentage-based fees are smallest. At mid-range prices, fixed fees become more competitive. The optimal platform depends on your specific trade.
How does the deposit method affect my returns?
Some platforms charge fees for certain deposit methods. Debit card deposits on Kalshi incur a 2% fee, while ACH transfers are free. Crypto.com charges 1.49% for debit cards but nothing for ACH. Choosing the right deposit method can save several dollars per trade on larger positions.
What is effective odds in the results table?
Effective odds represent your real after-fee payout ratio. If you buy a contract at 50 cents and the effective odds are 1.85 instead of 2.00, it means fees are costing you 15 cents per contract on a winning trade. Lower effective odds mean more fee drag on your returns.
Does Kalshi pay interest on idle balances?
Yes. Kalshi currently pays 3.75% APY on balances above $250, calculated daily. For traders holding positions over weeks or months, this interest can partially offset trading fees. No other major US prediction market currently offers balance interest.
How are withdrawal fees calculated?
Withdrawal fees vary by platform and method. Some charge a flat dollar amount (like Kalshi at $2.00 for debit card withdrawals), while others charge nothing for standard bank transfers. The calculator applies the withdrawal fee to your total payout amount on winning trades.
What does ROI percentage mean in this context?
ROI (Return on Investment) is your net take-home profit divided by your initial position cost, expressed as a percentage. A 90% ROI on a $50 position means you net $45 in profit after all fees. Comparing ROI across platforms shows which gives you the best return per dollar invested.
Why should I check both the win and lose scenarios?
The lose scenario shows your total cost of being wrong, including fees you still pay even on a losing trade. Some platforms have lower total losses because they charge fewer fees on the trading side. Understanding both scenarios helps you assess the true risk-reward of each platform.