New users who sign up with Kalshi referral code ACTION can trade $25 and get up to $500 — the biggest welcome ceiling on any regulated event-contract market. It's live for Athletics vs. Red Sox on Saturday, first pitch 4:10 p.m. ET on FS1 from Fenway Park.
Kalshi is a federally regulated exchange where you trade contracts priced from $0.01 to $0.99 on real-world outcomes, MLB games included. Enter Kalshi referral code ACTION at sign-up, put $25 into your first trades, and the bonus scales toward $500. If your registration screen says "referral code," it's the same thing — the Kalshi promo code ACTION works either way.
Kalshi Referral Code ACTION Overview
Your first $25 in contracts unlocks a bonus that climbs to a $500 cap. Contracts settle at a flat $1.00 when they hit, so your entire edge is the price you pay — and on an exchange you can shop for it.
| Detail | Terms |
|---|---|
| Referral code | ACTION |
| Offer | Trade $25, Get up to $500 |
| Operator | Kalshi (regulated event-contract exchange) |
| Eligibility | New users, 18+ |
| Excluded states | AZ, IL, MA, MD, MI, MT, NV, OH, WA |
Use Kalshi Promo Code ACTION on Athletics vs. Red Sox Prediction
With the bonus in hand, here's the MLB contract I'd target. Boston profiles as a strong home favorite at Fenway, and the exchange is exactly where I want that view — my lean is Red Sox to win, priced around $0.68 on Kalshi's game market.
The logic is matchup-driven, not a leap of faith: the Red Sox carry the home designation in a spot where they're the more complete roster, and short home favorites like this are the exact price range where the bonus stake earns its keep. Because Kalshi's welcome offer scales toward a $500 ceiling, you're not betting scared — the extra trading power lets you build the position at the number you want instead of chasing it.
Here's how the board sets up, with contract prices live:
| Kalshi Market | Contract | Approx. Price | Implied Odds |
|---|---|---|---|
| Moneyline | Red Sox to win | ~$0.68 | −213 |
| Moneyline | Athletics to win | ~$0.35 | +186 |
| Total | Over 8.5 runs | ~$0.50 | +100 |
| Total | Under 8.5 runs | ~$0.52 | −108 |
Prices are representative and move right up to 4:10 p.m. ET — check the live board and the posted starters before you trade.
For a second angle, the Under 8.5 gives you a path that doesn't depend on which side wins, which is a useful hedge when a favorite this size can win the game but not cover a total. Weigh the live MLB odds and confirm the starters before you commit, since one late scratch can swing every price on the grid.
How to Claim the Kalshi Referral Code ACTION
- Head to the sign-up page via the Kalshi promo code ACTION link.
- Create your account and enter ACTION in the promo/referral field.
- Confirm you're 18+ and outside the excluded states.
- Fund your account and place your first $25 in trades to start unlocking the bonus.
Kalshi sits alongside the field on Action Network's prediction market promos page, and you can weigh it against the full slate of prediction market apps. The broader prediction markets hub tracks how contracts are moving across the board.
Kalshi Referral Code ACTION FAQ
How does the Kalshi ACTION bonus work?
Trade $25, get up to $500. Enter code ACTION at sign-up, fund your account, and place your first trades — the bonus scales toward a $500 ceiling based on your activity.
Do I need a promo code, or is it a referral link?
Either one works. Code ACTION is the same whether your screen asks for a "Kalshi promo code" or a "Kalshi referral code," so enter it in whichever field appears.
What can I trade for Athletics vs. Red Sox?
Any market Kalshi lists. Once your account is funded, put contracts on the moneyline, run line, or the game total for Saturday's 4:10 p.m. ET matchup on FS1.
What's the Red Sox contract price on Saturday?
Around $0.68 for Boston as the home favorite, with the Athletics near $0.35 as the road underdog — confirm the live number, since prices move up to first pitch.
Is Kalshi available in Massachusetts?
No — Massachusetts is excluded. Kalshi is dark in AZ, IL, MA, MD, MI, MT, NV, OH, and WA, so Boston-based readers will need an app that covers their state.
Is Kalshi safe to use?
Yes — it's federally regulated. Kalshi is a CFTC-regulated exchange, meaning you're trading event contracts under federal oversight rather than placing sportsbook bets.
Kalshi: 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.
