The Kalshi promo code ACTION turns a $25 trade into up to $500 in bonuses, and Monday's lone afternoon MLB game gives new traders a clean spot to deploy it. Cardinals vs. Reds opens a day/night doubleheader at Great American Ball Park at 1:40 p.m. ET, hours before the rest of the slate. Our Kalshi review covers the platform in depth.
Kalshi prices each outcome as a contract between $0.01 and $0.99 that settles at $1 when your side hits, so a $0.53 position returns $0.47. You also add, trim, or exit at the live price mid-game, which matters in a doubleheader opener where one inning moves the number several cents.
Enter the Kalshi referral code ACTION during registration, fund your account with $25, and put the bonuses toward this afternoon's opener.
Kalshi Promo Code ACTION at a Glance
This ranks among the best prediction market promos available right now, and the terms stay simple.
| Feature | Details |
|---|---|
| New User Offer | Trade $25, get up to $500 in bonuses |
| Promo Code | ACTION |
| Minimum Trade | $25 |
| Minimum Age | 18+ (higher in some states) |
| Eligible States | AK, AL, AR, CA, CO, CT, DC, DE, FL, GA, HI, IA, ID, IN, KS, KY, LA, ME, MN, MO, MS, NC, ND, NE, NH, NJ, NM, NY, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WI, WV, WY |
How to Claim the Kalshi Promo Code ACTION in 5 Steps
New traders activate the offer in a few minutes on mobile.
- Tap any claim link on this page and download the Kalshi app.
- Register with your name, address, and contact details.
- Enter the Kalshi referral code ACTION when the app prompts you.
- Verify your identity, then fund the account with at least $25. Kalshi runs as a federally regulated exchange rather than one of the sportsbooks by state you compare elsewhere on our site.
- Place your first $25 trade and unlock up to $500 in bonuses.
The offer covers new users only across 41 states plus Washington, D.C. Kalshi accepts traders in several states where sports betting is not legal yet, including California, Texas, and Florida, so confirm you're in an eligible state first.
Cardinals vs. Reds Odds, Preview and Expert Pick on Kalshi
The market treats this one as a coin flip. St. Louis (63-61) sits 3.5 games closer to the third National League wild card than Cincinnati (59-64), and prediction markets post the Cardinals near 52% with a total of 9.5.
Quinn Mathews draws the Game 1 start for St. Louis as the extra arm added for the doubleheader, while Cincinnati has yet to confirm a starter. The Reds bullpen arrives in rough shape after a taxing Sunday, and Terry Francona now navigates five games in four days with relievers he already leaned on.
Sal Stewart (26 homers, 91 RBI) anchors the Cincinnati lineup, while Jordan Walker enters at .313 in August. Starting depth and bullpen fatigue point in the same direction.
Cardinals vs. Reds Prediction: Cardinals 52%: St. Louis is 4-1 over its last five with a +16 run differential, while Cincinnati’s bullpen enters the doubleheader badly taxed, and Quinn Mathews gives the Cardinals a lefty matchup against a Reds lineup that has struggled against left-handed pitching.
If you like our content and picks, sign up with the Kalshi promo code ACTION to claim up to $500 in bonuses and trade the rest of the slate. Grab our full Cardinals vs. Reds prediction and MLB picks & predictions today for more Kalshi predictions.
Kalshi vs. Other Prediction Markets: Where the Better Price Sits
Contract prices drift across prediction markets, so the same outcome trades a few cents apart depending on where you look.
| Prediction Market Platform | Cardinals ML Price | Reds ML Price |
|---|---|---|
| Kalshi | 52% | 48% |
| Polymarket | 52% | 49% |
| Novig | 51.5% | 49% |
Why Kalshi Ranks Among the Best Prediction Market Apps
Kalshi pairs a fast mobile app with live in-game pricing, and the exchange never takes the other side of your trade. You trade peer-to-peer, exit early to lock in profit, and track one price instead of a spread and a total. Add the Kalshi promo code ACTION and new traders get the best prediction market offer on the board for an afternoon MLB game.
Kalshi Promo Code FAQs
Is the Kalshi promo code legit? Yes. The Kalshi promo code ACTION delivers up to $500 in bonuses after your first $25 trade, and Kalshi operates as a CFTC-regulated exchange.
Do I need the code to qualify? Yes. Enter the Kalshi referral code ACTION at registration, because Kalshi applies bonuses only to accounts that carry it.
What do I trade the bonuses on? Any market on the platform, including today's doubleheader, the full slate, politics, and economic data.
Bottom Line on the Kalshi Promo
Monday's afternoon standalone offers a rare quiet window before the night games start. Claim the Kalshi promo code ACTION, fund $25, and take your position on the Cardinals by 1:40 p.m. ET.
Certain limitations apply. The offer is available to new users only, subject to the terms and conditions at kalshi.com/tc/500. 18+ only. Restrictions and eligibility requirements apply. Event contract trading involves significant risk and is not appropriate for everyone. Please carefully consider if it is appropriate for you in light of your personal financial circumstances. Kalshi products are not available in all jurisdictions. See kalshi.com/regulatory for more information. Not available in AZ, IL, MA, MD, MI, MT, NV, OH, and WA.
