Kalshi $25 Bonus Faces Polymarket $50 Offer in NFL Prediction Markets

For markets participants, the Kalshi-Polymarket promo war is about more than football. Kalshi is a CFTC-regulated exchange where event contracts trade like binary options, and its Rams -6.5 contract at $0.52 implies a 51 percent probability. Polymarket US requires KYC but does not disclose a federal regulatory status in the promotional material, making the two offers a useful case study in retail event-contract distribution.

Two prediction-market platforms moved aggressively to convert Monday Night Football viewers into traders on September 21, 2026, publishing competing signup promotions ahead of the Los Angeles Rams-New York Giants game. Kalshi's code AL25 offers a $25 bonus after a new user trades $25, while Polymarket's code NJCOM offers a $50 trading bonus for a minimum $10 deposit. The offers are described in affiliate-style articles on AL.com and NJ.com, so the bonus terms, timing, and regulatory descriptions should be read as promotional claims rather than independently verified reporting.

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Kalshi's code AL25 offers a $25 bonus after a new user trades $25, while Polymarket's code NJCOM offers a $50 trading bonus for a minimum $10 deposit.

As event contracts grow in retail adoption, the promotions highlight a market-structure difference. Kalshi presents itself as a federally regulated financial exchange supervised by the CFTC and available in more than 40 states. Its users buy Yes/No contracts priced from $0.01 to $0.99; winning contracts pay $1, and the article uses a Rams minus-6.5 contract priced at $0.52 as an example, implying 51 percent probability and $0.49 profit per winning contract. Polymarket US, by contrast, is described as a peer-to-peer market where users buy shares on sports, culture, entertainment, and weather outcomes. Its shares also trade in the $0.01 to $0.99 range and pay $1 on a win, but the source does not specify a federal regulatory status beyond age, identity, and location verification through Know Your Customer checks. That distinction matters for user trust and legal access.

The Kalshi and Polymarket offers also differ in incentive design. Kalshi ties the $25 bonus to a $25 trade, requiring a funded account and an actual transaction before the reward. That reduces the risk of bonus harvesting but adds onboarding friction. Polymarket's $50 for a $10 deposit is a five-to-one match and offers a larger headline number, but the credit arrives within 72 hours and must be used within 30 days, creating a retention window. For platforms built on liquidity and fee volume, the quality of acquired users may be more important than raw signups; traders who immediately place a contract have higher lifetime value than depositors who never trade.

The sports context increases the marketing surface. The Rams entered 2026 as a decisive Super Bowl favorite after a bountiful offseason, but a loss to the Giants would drop them to 0-2. The Giants beat the Dallas Cowboys 28-20 in Week 1 behind three touchdown passes from Jaxson Dart. The game provides multiple contract types — moneylines, point spreads, totals, and player props — giving both platforms liquid markets to advertise. Polymarket specifically notes that users can combine markets into parlay-style trades, although the promotional article says those are harder to buy and sell. Kalshi emphasizes that its prices and probabilities are driven by trading activity rather than a house setting lines.