By PredictQ Team // Updated: August 2026
Underdog Predict’s fees now come from its own CFTC-regulated exchange, the one it launched in July 2026 after completing the Aristotle migration, and the model is the simplest in prediction markets: $0.02 per contract to open a position, $0.02 per contract to close early, $0 on anything held to settlement. That’s it. No probability-weighted formula like Kalshi, no category rates like Polymarket, no settlement fee at all.
It’s the flat model Underdog carried over when it moved trading onto its own exchange, and it’s the same structure OG.com runs on CDNA. If you’re coming from sportsbooks, flat per-contract pricing is the easiest structure to reason about. If you’re a high-volume trader, it’s predictable but not always the cheapest. Here’s the full breakdown with worked numbers.
The Fee Structure
Two charges, one waiver:
$0.02 per contract when you open a position. Buying 100 contracts costs $2.00 in fees on top of the contract price.
$0.02 per contract when you sell before settlement. Exiting early costs the same as entering.
$0 at settlement. Hold to resolution and you pay nothing on the way out, win or lose.
Note we’ve dropped the “technology fee” tiers you may have seen in older writeups of the CDNA model. Current published pricing is the flat $0.02 structure described here. Always confirm the live fee schedule in-app before sizing up. One more reason to watch this space: now that Underdog holds all three CFTC licenses and runs its own exchange, it controls its fee schedule outright for the first time. In conversations with PredictQ, the team has told us directly they want to build for true prediction market principles, and pricing is a lever they now own.
The Settlement Waiver Is the Whole Game
The most important mechanic: positions held to settlement pay no exit fee. That cuts your round-trip cost in half whenever you let a contract resolve instead of trading out.
In practice:
Active trading: You pay $0.04 per contract round-trip, every time. Over volume, that compounds.
Buy and hold: You pay $0.02 per contract, once. Half the cost of churning.
Losing positions held to settlement: Also no exit fee. The position itself is your loss, but the exchange doesn’t pile on.
The structure rewards conviction. Take a position, hold it to resolution, pay half of what a churner pays.
Worked Examples
Example 1: Buy 100 contracts at $0.55. Contract wins at settlement.
Open fee: 100 x $0.02 = $2.00
Settlement fee: $0
Position cost: $55
Payout: $100
Net profit: $43
Example 2: Buy 100 contracts at $0.55. Sell early at $0.65.
Open fee: $2.00
Close fee: $2.00
Position cost: $55
Sale proceeds: $65
Net profit: $6
Same position, and the early exit gave $4 of a $10 gross gain back in fees. On thin moves, the double charge eats a real share of your edge.
Example 3: Buy 100 contracts at $0.55. Contract loses at settlement.
Open fee: $2.00
Settlement fee: $0
Total damage: $57 (the $55 position plus the $2 to open it)
Fees Don’t Vary with Probability
Kalshi’s formula scales with price x (1 - price), so its fees peak on coin-flip markets (about $1.75 per 100 contracts at 50 cents) and shrink toward zero at the extremes. Underdog Predict charges the same $0.02 whether the contract trades at $0.50 or $0.95.
That difference cuts both ways. Buying near the extremes, say a heavy favorite at $0.92, the flat $2 per 100 contracts costs you more than Kalshi’s formula would. At 50/50, held to settlement, the flat model’s $2 is close to Kalshi’s $1.75, and selling early flips the advantage back to Kalshi. Where you like to trade determines which structure is cheaper for you.
Deposit Fees
Underdog charges nothing on Predict deposits. Debit card, PayPal, Venmo, and Trustly bank transfers are all free at the platform level; the only costs would come from your own bank or card issuer, which is rare on consumer accounts.
Credit cards are not supported for Predict deposits at all, unlike the DFS side of the app. The minimum deposit is $10.
Withdrawal Fees
Also zero from Underdog. Trustly bank transfers land in 1-3 business days, PayPal typically within 24 hours, Venmo fast when the account name matches, debit card often within hours. Most withdrawals clear within 24 to 72 hours, and the platform targets 24-hour processing on settled contracts.
Settlement Rules and Edge Cases
Three scenarios that touch your fees:
Cancelled events: If an event is postponed, cancelled, or not completed within 48 hours of its scheduled start, the exchange treats it as a Cancelled Event. Yes positions settle at the volume-weighted average price from the week before cancellation, No positions get $1 minus that amount, and opening fees are refunded.
Ties or draws: If a tie happens and no tie outcome was listed, both sides receive $0.50 per contract. Opening fees are not refunded.
Combo entries: Combos linking DFS picks with Predict contracts follow the DFS entry fee structure, not the per-contract model. Read the specific combo terms before entering.
How to Keep Your Fee Bill Down
Hold to settlement when your thesis is intact. The waiver is the single biggest lever, cutting round-trip cost in half.
Don’t scalp. Every entry and exit costs $0.02 per contract. This model punishes high-frequency repositioning.
Mind the price extremes. Flat fees are proportionally expensive on high-priced favorites. A $0.02 fee on a $0.95 contract is a much bigger share of your potential profit than on a $0.50 contract.
Fund by Trustly or debit to keep the funding leg free end to end.
Know the cancellation and tie rules before trading markets where postponements are realistic.
Put the settlement waiver to work on Underdog Predict →
Compared to Other Platforms
Cost on 100 contracts at a 50/50 market:
Underdog Predict, held to settlement: $2.00
Underdog Predict, sold early: $4.00
OG.com, held to settlement: $2.00 (same flat model, running on CDNA)
Kalshi: up to $1.75 in taker fees
Polymarket (Sports): $0.75 maximum
Polymarket (Geopolitics): $0
Traditional sportsbook: roughly $4.50 in implied vig per $100 at -110
For pure fee minimization, Polymarket and Kalshi win most scenarios. For traders who buy and hold to settlement, the gap narrows to pennies, and every one of these platforms beats the sportsbook vig by a mile.
Bottom Line
Underdog Predict’s pricing is flat, published, and easy to compute in your head: two cents in, two cents out early, nothing at settlement. The settlement waiver genuinely favors position traders, and the whole structure beats -110 pricing without contest. Active traders chasing the absolute lowest cost per trade should look at Kalshi or Polymarket. And for where pricing could head once the IG Group acquisition closes, we put our wishlist in our open letter to Underdog’s new owners.
Know where you trade on the probability curve, hold when you’re right, and the fees here will never be what kills you. Open your Underdog Predict account and check the live schedule yourself.
Disclosures: PredictQ may receive compensation when readers sign up for platforms through links on this page. Fee information accurate as of August 2026 and subject to change. Trading event contracts involves substantial risk and is not appropriate for all participants. This content is for informational purposes only and does not constitute financial advice. Must be 18 or older. If you or someone you know has a gambling problem, call 1-800-GAMBLER.