Action Network has all the best Indy 500 prediction market appsfor you to sign up with ahead of the green flag waving at 12:45 p.m. ET on FOX. Kalshi and Polymarket are two of the most well-known prediction markets. But Novig and ProphetX are two other excellent options to register with.
Tap on any of the links in this article to create accounts on the top Indy 500 prediction market apps. Unlock hundreds of dollars in bonus funds now to trade on the biggest race in motorsports today, Sunday, May 24, 2026.
What Are the Best Prediction Market Promos for Indy 500?
Capitalize on the new player bonuses offered by the prediction markets below to trade on Indy 500 winner markets, top three or top five placements, or head-to-head matchups. Read our expert Kalshi vs. Polymarket article to decide for yourself which of these Indy 500 prediction market apps is right for you.
Kalshi Promo Code ACTION: Trade $10, Get $10!
Kalshi Promo Code ACTION: Trade $10, Get $10!
Available in: AL, AK, AR, CA, CO, CT, DE, FL, GA, HI, ID, IN, IA, KS, KY, LA, ME, MN, MS, MO, NE, NH, NM, NJ, NY, NC, NV, ND, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY, DC
Redeem a $10 Indy 500 trading bonus with our verified Kalshi referral code ACTION today. Sign up now and trade $10 on the most exciting race in motorsports to trigger $10 in bonus funds. Get taken deeper into Indy 500 prediction market contracts on Kalshi than any other of the Indy 500 prediction market apps in this article.
Polymarket Promo Code ACTION: Deposit $20, Get $50 Bonus
Polymarket Promo Code ACTION: Deposit $20, Get $50 Bonus
Available in: AL, AK, AR, CA, CO, CT, DE, FL, GA, HI, ID, IN, IA, KS, KY, LA, ME, MN, MS, MO, NE, NH, NM, NJ, NY, NC, ND, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY, DC
Use our new Polymarket referral code ACTION to pocket $50 in bonus funds from one of the premiere Indy 500 prediction market apps in the industry. Make a $20 deposit once you register your account to activate these bonus funds and trade on live pricing updates ahead of and after when the green flag waves.
Novig Promo Code ACTION: Spend $5, Get $50 in Novig Coins!
Novig Promo Code ACTION: Spend $5, Get $50 in Novig Coins!
Available in: AK, AR, CA, FL, GA, HI, IL, IN, IA, KS, KY, ME, MA, MN, MO, NE, NH, NC, ND, OH, OK, OR, SC, SD, TX, VT, VA, DC, WI, WY
Novig is just as strong an app as the Indy 500 prediction market apps above. Novig is a sweepstakes-style app where you trade Novig Coins and win more of this currency. Novig Cash is a separate way to play for real money prizes. Take advantage of Novig promo code ACTION and complete a $5 purchase now to score $50 in Novig Coins.
ProphetX Promo Code ACTION: 20% Purchase Match up to $100
ProphetX Promo Code ACTION: Get a 20% Purchase Match up to $100 in Bonus Funds!
Available in: AL, AK, AZ, AR, CA, CO, CT, DE, FL, GA, HI, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS, MO, MT, NE, NV, NH, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY
Round out your arsenal of Indy 500 prediction market apps by using our Action Network ProphetX promo code ACTION during registration. Get 30% of your first cash deposit matched in trading bonus, up to $100. ProphetX provides a diverse catalogue of Indy 500 markets to trade on, so sign up now.
How to Use Indy 500 Prediction Markets
The Indy 500 prediction market apps in this piece implement registration processes that function similarly to these sign-up steps:
- Sign up via the links or modules in this article to create your new account.
- Type in your prompted information, such as age, name, and location.
- Lock-in offers from the best Indy 500 prediction market apps.
- Deposit funds into your prediction market account with any banking method.
- Trade on Indy 500 prediction markets this Memorial Day weekend.
