How to claim the Underdog promo code
- Tap Claim at Underdog. Our link opens Underdog's registration with our referral attached.
- Create your account. If Underdog shows a promo code field, its published code for this offer is UDPROMO.
- Make your first deposit; Underdog says it is matched with bonus funds, up to $1,000.
- Read Underdog's terms for how the bonus funds release before you play.
Why Underdog
Underdog's own description of the product: player pick'em, predictions and season-long fantasy for the NFL, NBA and more. It is a different format from a sportsbook line, and a deep player menu is the draw.
Underdog is not in our odds feed, so it never appears on the +EV board or line shopping. Our player props tool prices sportsbook props against the market; use it to sanity-check a player number before you enter a pick'em slip.
This page quotes Underdog's own promo page as of the date shown. Anything the page does not state is left to Underdog's terms.
Where Underdog is available
Underdog sets its own state list by product, and it changes. The app tells you what is available where you are at sign-up; see Underdog's terms for the current list.
Source: Underdog Terms of Use, read September 30, 2026.
Frequently asked questions
What is the Underdog promo code?
Underdog publishes UDPROMO for its welcome offer of up to $1,000 in bonus funds on a first deposit. Our link opens Underdog's registration with our referral attached, so you get the same offer either way.
Is Underdog a sportsbook?
Underdog describes itself as predictions, pick'em and season-long fantasy. It is not in our sportsbook odds feed, so it does not appear on our price tools.
How do bonus funds work?
Underdog matches your first deposit with bonus funds, up to $1,000. The match rate, release schedule and any expiry are in Underdog's terms, which control.
Is Underdog available in my state?
Underdog sets availability by product and state and checks your location at sign-up. See Underdog's terms for the current list.
Does Wise Guy Team get paid if I sign up?
We may earn a commission when a new customer signs up through our link. It never changes the offer or which plays we post.
Next step: bet the best number
Signing up is step one. The edge comes from taking the best available price on every bet, which is what our tools are for.
21+ (or the legal age where you live). Gambling problem? Call 1-800-GAMBLER. Offers, eligibility and availability are set by Underdog and can change; confirm them in the app before you deposit. Wise Guy Team is not a sportsbook or exchange and does not accept wagers. See our responsible gambling page.