The Round of 32 tips off today, and there's still time to grab nearly $4,000 in March Madness betting promos before another full slate of college hoops. Key matchups like Arkansas vs. St. John's (2:40 p.m. ET) and Creighton vs. Auburn (7:10 p.m. ET) headline today’s action, making now the perfect time to claim these welcome offers.
This is one of the most exciting stretches of the tournament as teams fight for a spot in the Sweet 16. Today, you can back some of the top seeds like Auburn, Houston, and Tennesssee or pull for an underdog like McNeese State to continue a Cinderella run. These March Madness betting promos offer bonus bets, deposit matches, and first-bet offers to boost your bankroll.
Once you select your bonus offers, be sure to check the latest NCAAB odds and start building your bet slip with college basketball picks for today's games, tomorrow’s matchups, or even March Madness futures bets as the field shrinks. Betting on March Madness futures is a smart way to lock in value before lines shift in between rounds.
Review the chart below to see which March Madness betting promos best fit your college basketball betting style:
| March Madness Betting Apps | Best March Madness Betting Promos | Sign-Up Link |
|---|---|---|
| bet365 | $1,000 First Bet Safety Net or $150 Bet-and-Get | TOPACTION |
| Caesars Sportsbook | Bet & Get $150 in Bonus Bets or Get 10 100% Profit Boost Tokens | ACTION4BG1 |
| BetMGM | Bet $10, Get $150 in Bonus Bets if You Win or $1,600 Deposit Match | ACTIONGET |
| Fanatics Sportsbook | $1,000 in No Sweat Bets or Bet $30, Get $300 in Bonus Bets | CLICK HERE |
| Underdog Fantasy | Get Up to $1,000 Bonus Cash From First Deposit | TOPACTION |
College Basketball March Madness Betting Promos
1. bet365
- bet365 Bonus Code: TOPACTION
- bet365 Promos: $1,000 First Bet Safety Net or Bet $5, Get $150 in Bonus Bets Win or Lose
- bet365 PA Promo: Bet $5, Get $150 in Bonus Bets + 50 Casino Spins, Win or Lose
- bet365 States Available: AZ, CO, IA, IL, IN, KY, LA, NC, NJ, OH, PA, TN, VA
As the Round of 32 tips off today, bet365 Sportsbook continues to offer some of the top March Madness betting promos on the market. New users in AZ, CO, IA, IL, IN, KY, LA, NC, NJ, OH, TN, and VA can choose between a $1,000 First Bet Safety Net or a $150 bet-and-get bonus. Just sign up with the bet365 bonus code TOPACTION to claim one of these limited-time offers ahead of today’s NCAA Tournament matchups.
If you opt for the First Bet Safety Net, place a qualifying wager at -500 odds or longer. If your bet loses, you receive your entire stake back in bonus bets—up to $1,000.
Let's say you place a $1,000 first bet on BYU +1.5 (-110) against Wisconsin, and they cover, you win $1,909. If the Cougars fall short, bet365 Sportsbook refunds your full stake in bonus bets to use on future wagers.
However, with bet365 Sportsbook, you can get started with just $5. Sign up with the bet365 bonus code TOPACTION and bet just $5 on any eligible market to get $150 in bonus bets—win or lose. In Pennsylvania, this promo also includes 50 spins for bet365 Casino as an additional perk.
2. Caesars Sportsbook
- Caesars Sportsbook Promo Code: ACTION4BG1
- Caesars Sportsbook Welcome Offer: Bet $1, Get $150 in Bonus Bets if You Win
- Caesars Sportsbook Promo Code: ACTION4DYW
- Caesars Sportsbook Welcome Offer: Bet $1, Get 10 100% Profit Boost Tokens
- Caesars Sportsbook States Available: AZ, CO, DC, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, NC, NJ, NY, OH, ON, PA, TN, VA, WV, WY
With the Round of 32 tipping off today, Caesars Sportsbook is offering two exciting March Madness betting promos to help new users build their bankroll. You can choose between a $150 bet-and-get bonus or 10 Profit Boost Tokens—perfect for maximizing value during today’s NCAA Tournament action and beyond.
Sign up with Caesars Sportsbook promo code ACTION4BG1 and place a $1 first bet to unlock $150 in bonus bets. To secure the bonus bets, your initial wager must win.
If it does, Caesars Sportsbook credits your account with six $25 bonus bets, which can be used on any eligible market—including today's Round of 32 matchups like Michigan vs. Texas A&M or Drake vs. Texas Tech. Bonus bets expire after 30 days, so use them while the tournament is heating up.
How does doubling your winnings sound? If that sounds great, then you should sign up with the Caesars Sportsbook promo code ACTION4DYW to receive 10 Profit Boost Tokens after placing just a $1 first bet.
Here’s how to pocket Profit Boost Tokens and use them today:
- Place a $1 first wager
- Instantly receive 10 Profit Boost Tokens
- Use them on bets up to $25 across various sports
- Double your profits on any winning bet
Profit Boost Tokens expire 14 days after they are credited to your account.
These boosts are a great way to add value to today’s March Madness bets—as well as your plays in the NBA, NHL, MLB, and more.
3. BetMGM
- BetMGM Bonus Code: ACTIONGET
- BetMGM Promo: Bet $10, Get $150 in Bonus Bets if You Win
- BetMGM Bonus Code: TOPTAN1600
- BetMGM Promo: 20% First Deposit Match, Up to $1,600 in Sports Bonus
- BetMGM Bonus Code: TOPACTION
- BetMGM Promo: $1,500 First Bet Offer
- BetMGM States Available: AZ, CO, DC, IA, IL, IN, LA, KS, KY, MA, MD, MI, NC, NJ, OH, PA, TN, VA, WV, WY
Your Round of 32 betting card should be built at BetMGM Sportsbook, as they have three March Madness betting promos to help new users boost their bankrolls. Whether you’re after bonus bets, a deposit match, or a first bet offer, there’s a BetMGM bonus code for you.
Bet $10, Win $150 in Bonus Bets (Available in CO, MI, NJ, PA, and WV)
Sign up with BetMGM bonus code ACTIONGET, place a $10+ bet on any market, and if it wins, you receive $150 in bonus bets. Just remember—your first wager must win to unlock the bonus.
20% Deposit Match Up to $1,600 (Available in AZ, CO, DC, IN, IA, KS, KY, MA, MD, MI, NJ, NC, PA, TN, WV, and WY)
Register with BetMGM bonus code TOPTAN1600 to get a 20% deposit match up to $1,600. To unlock the full amount, deposit $8,000 or more—but any deposit of $10+ qualifies for bonus funds.
First Bet Safety Net – Up to $1,500 in Bonus Bets (Available in AZ, DC, IA, IL, IN, LA, KS, KY, MA, MD, NC, OH, TN, VA, and WY)
If you're looking to make a large first bet, sign up with BetMGM bonus code TOPACTION, and if your first wager loses, you get your stake back in bonus bets up to $1,500, divided into five equal parts.
4. Fanatics Sportsbook
- Fanatics Sportsbook Promo: Activate Here
- Fanatics Sportsbook Bet-and-Get Promo: Bet $30, Get $300 in Bonus Bets
- Fanatics Sportsbook Sign-Up Bonus: $1,000 in No Sweat Bets
- Fanatics Sportsbook NY Sign-Up Bonus: 300% Profit Boost Token
- Fanatics Sportsbook States Available: AZ, CO, CT, DC, IA, IN, KS, KY, LA, MA, MD, MI, NJ, OH, PA, TN, VA, VT, WV, WY
Fanatics Sportsbook is also offering a three-pack of March Madness betting promos for the Round of 32, giving new users the flexibility to pick the Fanatics Sportsbook promo that fits their style and location. Whether you're eyeing a bet-and-get offer, No Sweat Bets, or a 300% Profit Boost, there’s a Fanatics Sportsbook promo designed to boost your bets for the NCAA Tournament.
$300 Bet-and-Get Bonus (Available in AZ, CO, CT, IN, LA, MA, MD, MI, NJ, PA, TN, VA, WV)
This popular promo gives you $300 in bonus bets over three days:
- Place a $10+ bet each day for three consecutive days
- Receive $100 in bonus bets after each day, totaling $300
Up to $1,000 in No Sweat Bets (Available in AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, NC, NJ, OH, PA, TN, VA, VT, WV, WY)
Fanatics Sportsbook has your back with 10 days of No Sweat Bets. If your bet loses, you get up to $100 back in bonus bets each day—up to $1,000 total—so you can keep betting even if you hit a rough patch.
300% Profit Boost Token (New York Exclusive)
Bettors in New York can triple their payout on today’s March Madness action with a 300% Profit Boost Token:
- Bet up to $50 on any eligible college basketball market
- If your bet wins, Fanatics Sportsbook triples your profit, giving you exponential value on a single wager
Alternate College Basketball March Madness Betting Promos
With the Round of 32 tipping off today, you don’t need to stick to traditional sportsbooks to get in on the action. Kalshi and Underdog Fantasy are offering unique, rewarding ways to engage with March Madness—whether you're into predictive markets or building DFS lineups with top college basketball talent.
1. Kalshi Predictive Market
- Kalshi Promo Code: ACTION
- Kalshi Welcome Offer: Make $100 in Trades, Get $10 Sign-Up Bonus
- Kalshi States Available: All 50 States + Washington D.C.
Kalshi gives you a new way to experience March Madness by letting you trade on outcomes instead of placing standard bets. This futures-style platform lets you speculate on everything from tournament results to economic and political events.
How to Claim Your Kalshi Bonus:
- Sign up using the Kalshi promo code ACTION
- Make $100 in trades across any market
- Receive a $10 bonus to continue trading and exploring
Perfect for fans looking to combine their love of March Madness with data-driven predictions.
2. Underdog Fantasy (DFS)
- Underdog Fantasy Promo Code: TOPACTION
- Underdog Fantasy Sign-Up Offer: 50% Deposit Match, Up to $1,000 in Bonus Funds
- Underdog Fantasy States Available: AL, AK, AZ, AR, CA, DC, DE, GA, IL, KS, KY, MA, MN, MO, NE, NM, NC, ND, OK, OR, RI, SC, SD, TN, TX, UT, VT, VA, WI, WV, WY
Jump into Daily Fantasy Sports with the Underdog Fantasy promo code TOPACTION to receive a 50% deposit match bonus up to $1,000. Build DFS lineups featuring your favorite players from today’s Round of 32 matchups.
Whether you're entering a March Madness DFS contest or trying out a new pick'em lineup strategy, this bonus gives you extra flexibility and more chances to win big.