Polymarket and Kalshi roll out new US promo codes with up to $500 bonuses

Several online prediction‑market platforms have launched fresh promotional codes for U.S. users. Polymarket introduced invite codes such as CUSE, SOUTH and ELITE1, each granting a $20 bonus after a $10 deposit and a $10 trade. The codes apply to a range of markets, including NFL, MLB, politics and crypto, and are active as of August 2 2026.

Kalshi released multiple referral codes—including ALCOM, MASSLIVE1, OREGONLIVE1 and SILIVE—offering variable bonuses up to $500 for new accounts that trade at least $25. Eligible users must be 18 or older, reside in a qualifying state, and complete identity verification. The bonuses can be used on sports, political and economic prediction markets.

All offers target first‑time traders in the United States, require a minimum deposit ($10 for Polymarket, $25 for Kalshi), and are limited to one bonus per user. The promotions coincide with a busy sports calendar, featuring NFL preseason games and a full MLB slate, and aim to attract liquidity to the platforms' prediction markets.