Underdog Promo Code WSNPLAY: Play $5, Get $100 in Bonus Entry October 2026

Underdog Predict promo code WSNPLAY gets new users $100 in bonus funds after a qualifying $5 play, and you can use that bonus directly on Underdog's prediction markets. The bonus carries a 1x playthrough. Here are the key details of the offer:

What Is the Underdog Predict Promo Code Offer?

The Underdog Predict promo code WSNPLAY unlocks $100 in bonus funds once you make your first deposit and place a qualifying play of at least $5. That is a 20x return on the qualifying play, and the bonus can be used directly on Underdog's prediction markets.

The offer comes with a 1x playthrough, so you play the bonus amount through once before any winnings from it can be withdrawn as cash.

By headline value, it beats the welcome offers at the two largest prediction markets. Kalshi pays $25 after a $25 trade, and Polymarket pays $50 after a $10 deposit. Our full list of prediction market bonuses covers every current offer side by side.

» To learn more about what the platform offers beyond the welcome bonus, check out our full Underdog review.

Claim Your Underdog Predict Bonus

What Is Underdog Predict?

Underdog Predict is the prediction market side of the Underdog app, where you buy Yes/No event contracts on real-world outcomes instead of building fantasy entries. You trade against other users rather than the house, and each contract pays out if your side is right.

Underdog launched Predict in 2025 in partnership with Crypto.com Derivatives North America (CDNA), a CFTC-regulated exchange in the US. Underdog Predict itself is a registered futures commission merchant (FCM), and trades may be placed on CDNA. That keeps trading inside a federally supervised framework rather than an offshore one.

Predict lives inside the main Underdog app, where it shows up as Team Picks alongside Pick'em, Champions, and Drafts. It doesn't get its own icon in the bottom navigation bar, so you reach it from the menu at the top of the screen.

For a deeper look at the platform's features, read our full Underdog Predict review.

How Underdog Predict Contracts Work

You buy whole contracts, not fractions, so the app rounds your order to the nearest whole contract. Each game offers Match Winner, Point Differential, and Total Points contracts, and tapping into a game opens player stat markets as well.

On lines like totals, you can move the target number up or down with the arrows. If an NBA total of 241.5 trades at 44¢ for Higher, moving the line to 242.5 drops the Higher price and raises your potential return, because the Higher outcome becomes harder to hit.

Once a position is open, it shows up in the Live tab. From there, you can add exposure with Reuse Pick or exit early with Cash Out.

Underdog doesn't offer an order book or resting orders. You can't see a live list of bids and asks, and you can't post a target price and wait for a fill. You take the price on screen when you hit Submit.

Markets Available

Underdog Predict covers the NFL, NBA, NHL, MLB, college football, soccer, and tennis, with more leagues listed as coming. Beyond single games, here's what else you can trade:

• Prediction Futures: season-level contracts on championship, division, and conference winners.

• Multi-team picks: bundle up to 4 selections in one entry, each from a different sport and a different game.

• Fantasy and prediction combos: mix prediction positions with fantasy picks in the same entry.

• Culture Markets: non-sports contracts on events like the Grammys and Oscars, plus politics, economics, business, and crypto prices.

In prediction-only states like Idaho, Washington, and Maine, Underdog also offers Prediction Player Picks on individual outcomes such as rushing yards and anytime touchdowns.

Underdog Predict Fees

Underdog Predict charges a flat $0.02 fee per contract, built into your entry when you buy. There's no additional fee when you sell or cash out, so 100 contracts cost $2 in fees no matter the price.

The table below shows what that flat fee means at three different contract prices:

Because the fee doesn't scale with price, it costs the most in percentage terms on cheap contracts. Kalshi works the other way: its fees depend on price and position size, run highest near 50¢, and can apply on both entry and exit when you take liquidity. Our Polymarket review breaks down how Polymarket's probability-based fees compare with Kalshi's.

Strategy: Getting the Most From Your $100 Bonus

Two platform rules shape how you use the bonus: you always take the price on screen, and you pay the $0.02 fee only once, on entry.

Start by pricing each outcome yourself before you look at the market. If you think a team wins 45% of the time and its contract trades at 38¢, that 7-point gap is the reason to buy. With no resting orders, you can't wait for a better price, so only buy when the current number already works for you.

Next, spread the $100 across several positions instead of one. Ten plays of $10 give you more chances to hit than a single $100 position, and the 1x playthrough clears just as fast either way.

Finally, use Cash Out actively. Since selling early carries no extra fee, cutting a position that has turned against you costs nothing beyond the price move, which makes early exits cheaper here than on Kalshi or Polymarket.

Key Terms and Conditions

The offer has a short list of terms, and most of them come down to timing and deposit size:

• New users only: You need to sign up with promo code WSNPLAY to qualify.

• Minimum deposit: Your first deposit has to be at least $10.

• Qualifying play: Place a play of at least $5 to trigger the bonus.

• Bonus: $100 in bonus funds, usable directly on Underdog's prediction markets.

• Playthrough: 1x. Play the bonus through once before winnings from it become withdrawable.

Where Is Underdog Predict Available?

Underdog Predict is available in states where Underdog operates its prediction market product, and the app checks your location before you trade. Because Predict runs through a CFTC-regulated exchange rather than state gaming licenses, it also reaches prediction-only states such as Idaho, Washington, and Maine, where Underdog adds Prediction Player Picks.

State access to prediction markets keeps shifting as courts and regulators push back on sports event contracts. Our prediction markets hub tracks where each platform currently stands.

Underdog Predict vs. Other Prediction Markets

Underdog Predict leads on bonus value and on exit costs, while Polymarket stays cheaper to enter. Here's how it compares with the two largest US prediction markets:

Kalshi still covers the widest range of non-sports markets, from economics to culture. Our Kalshi review covers its markets and payment fees in full.

Claim Your Underdog Predict Bonus

Making Your First Deposit

You need to deposit at least $10 to claim the offer, even though the qualifying play is only $5. Predict uses a separate wallet from Underdog's fantasy side, and it supports fewer payment methods.

Deposits work through Apple Pay (debit only) or Trustly. Venmo, PayPal, and credit cards are available on the wider Underdog platform but not for Predict deposits. Withdrawals offer more options, as the table below shows:

Underdog charges no fees on Predict deposits or withdrawals. Each withdrawal has to be confirmed through an email link within 10 minutes, or the request is canceled automatically.

Responsible Risk Management

Every prediction contract can lose its full purchase price, and the bonus doesn't change that. Underdog gives you several tools to keep that risk in check:

• Deposit limits: daily, weekly, or monthly caps.

• Entry fee limits: restrict how large a single entry can be.

• Entry count limits: cap how many entries you can submit.

• Cool-off periods: from 3 days to 9 months.

• Self-exclusion: from 1 year to a lifetime.

Set a budget before you deposit, decide your position sizes before you trade, and don't raise your exposure just because the last position missed. If trading stops feeling like entertainment, call 1-800-GAMBLER for free, confidential support.