1. BetMGM March Madness
BetMGM has highly competitive March Madness 2025 futures odds. You will also find a full array of betting markets and categories available throughout the tourney.
BetMGM is the best online sportsbook for betting on March Madness. First-time customers who sign up for the BetMGM bonus code ROTOSPORTS will land a First-Bet offer that will refund an opening wager loss up to $1,500 with equal bonus bet value.
BetMGM went all out in this area in recent tournaments, as it had a $10 million March Madness bracket betting contest. Expect another eye-opening promotion this year as well.
2. Caesars Sportsbook March Madness
Caesars Sportsbook does a very good job of providing competitive futures odds, so be sure to keep an eye on its offerings in this area for this year's March Madness tournament. It also has an expansive player prop betting selection in those states where collegiate prop betting is permitted.
Sign up for the Caesars Sportsbook promo code ROTODYW for a Bet $1, Get 10 100% profit boosts welcome offer.
3. DraftKings March Madness
DraftKings has long been among the best sports betting apps and this is certainly the case for those looking to bet on March Madness 2025. DraftKings is often one of the first online sportsbooks to release NCAA Tournament betting odds, yet those odds typically remain among the best on the respective boards.
New customers will receive a Bet $5, Get $150 in Bonus Bets Instantly deal after signing up for the DraftKings promo code.
4. FanDuel March Madness
FanDuel is the largest online sportsbook in the country for many reasons, including themed promotions for events like March Madness and because it has some of the top-rated sports betting apps.
The FanDuel promo code grants new customers a welcome offer of Bet $5, Get $150 in Bonus Bets If Your Bet Wins.
5. Fanatics March Madness
The Fanatics Sportsbook promo code is a perfect fit for those who like daily betting, as it gives new customers the ability to get a bonus bet up to $100 every day for up to 10 days after you create a new Fanatics Sportsbook account. Make a qualifying bet at -500 odds or longer. If your wager loses, Fanatics Sportsbook will give you matching bonus-bet credit up to $100. It works like this every day for up to 10 days, which could result in $1,000 in bonus bets via this terrific March Madness sportsbook promo.
Customers in MI, NJ, PA can instead choose the Bet $30, Get $300 in Bonus Bets offer. Make a qualifying wager of $10 or more and get $100 in bonus-bet credit, guaranteed, each of your first three days as a new customer. Those in AZ, CO, IL, IN, LA, MA, MD, NC, OH, TN, VA and WV can receive a Bet $50, Get $250 In Bonus Bets offer over their first five days as a new customer.
6. bet365 March Madness
The bet365 bonus code grants first-time customers a Bet $5, Get $150 in bonus bets deal whether or not your opening wager settles as a win or a loss. Those who sign up for this offer in Pennsylvania will also get 50 spins at the bet365 online casino.
7. ESPN BET March Madness
The ESPN BET promo code ROTO gives new customers peace of mind when making their opening wager, as this deal gives those customers $100 in bonus bets after a first bet of $10 or more, win or lose.