With March Madness officially underway, now is the perfect time to secure nearly $4,000 in March Madness betting promos before the tournament heats up. Tonight’s First Four matchups—Mount St. Mary’s vs. American and Xavier vs. Texas—kick off the NCAA Tournament, making it the ideal moment to grab exclusive welcome bonuses from the top sportsbooks.
This time of year is electric for college basketball fans as teams fight for a national championship. Whether you’re backing title contenders like Duke, Auburn, or Houston or searching for value on a Cinderella story, these March Madness betting promos provide you with bonus bets, deposit matches, and first bet offers to give you more ways to win.
Once you claim your bonuses, explore the latest NCAAB odds and start making your picks for First Four matchups, opening-round games, and Final Four futures. Betting on NCAAB futures odds is also a great strategy, allowing you to lock in value on teams before the field narrows.
Sign up now with the best March Madness betting promos and boost your bankroll before the tournament moves into full swing.
| 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 |
Top College Basketball March Madness Betting Promos
Get started now to take advantage of the best March Madness betting promos to secure thousands in bonus value ahead of the NCAA Tournament. With the Round of 64 starting tomorrow, now is the perfect time to take advantage of exclusive sportsbook offers. Register now and place your March Madness bracket bets and futures wagers before the first tip-off.
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 IL Promo: Bet $5, Get $150 in Bonus Bets + $50 Super Boost
- bet365 TN Promo: Bet $5, Get $150 in Bonus Bets + $50 Super Boost
- 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
bet365 is offering some of the best March Madness betting promotions, giving new users a choice between a $1,000 First Bet Safety Net or a $150 bet-and-get bonus in AZ, CO, IA, IL, IN, KY, LA, NC, NJ, OH, TN, and VA. Simply sign up using bet365 bonus code TOPACTION to take advantage of these limited-time offers before the NCAA Tournament gets underway.
If you choose the First Bet Safety Net, place a qualifying bet at odds of -500 or longer. If your wager loses, bet365 refunds your full stake in bonus bets, up to $1,000.
For example, if you place a $1,000 first bet on Clemson -7.5 (-110) against McNeese State and they cover, you receive $1,909 in total payout. However, if your bet doesn’t win, you still receive $1,000 in bonus bets to use on future wagers.
For a low-risk alternative, bet just $5 on any eligible market (odds of -500 or longer) and receive $150 in bonus bets—win or lose. In Pennsylvania, this offer also includes 50 spins for bet365 Casino.
bet365 Super Boosts for bet365 Illinois and bet365 Tennessee:
- Illinois bettors can take advantage of a Super Boost, allowing a $50 wager on at least one point being scored in the Creighton vs. Louisville game on Thursday, March 20.
- Tennessee users get a special Super Boost that lets them bet $50 on the Tennessee Volunteers moneyline (+100) to win their first-round game.
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
Caesars Sportsbook is rolling out two special March Madness betting promos, giving new users a choice between a bet-and-get bonus or profit boost tokens to enhance their bankroll. Whether you’re looking for a straightforward bonus bet offer or a way to double your winnings, these promos provide extra value as you wager on college basketball and beyond.
Sign up using Caesars Sportsbook promo code ACTION4BG1 and place a $1 first bet to qualify for $150 in bonus bets. However, your initial $1 wager must win for the bonus to activate.
If your bet cashes, Caesars Sportsbook rewards you with six $25 bonus bets, which can be used on any eligible market. These bonus bets expire after 30 days, so be sure to take full advantage of them while betting on March Madness.
Looking for a way to amplify your payouts? With Caesars Sportsbook promo code ACTION4DYW, you can claim 10 Profit Boost Tokens after placing a $1 first bet.
Here’s how it works:
- Place a $1 first wager to instantly receive 10 Profit Boost Tokens.
- Each token can be used on bets up to $25 across a variety of sports markets.
- If your bet wins, Caesars Sportsbook doubles your profit on that wager.
These boosts provide the chance to increase your winnings across March Madness, 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
BetMGM Sportsbook is rolling out three of the top March Madness betting promos, giving new users a variety of ways to start betting with extra value. Whether you're after bonus bets, a deposit match, or a first-bet offer, these offers provide multiple ways to get started.
Bet $10, Win $150 in Bonus Bets (Available in CO, MI, NJ, PA, and WV):
Sign up using BetMGM bonus code ACTIONGET and place a $10 first bet on any market. If your wager wins, you receive $150 in bonus bets. However, if your bet doesn’t hit, you won’t qualify for 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):
With BetMGM bonus code TOPTAN1600, new users can receive a 20% match on their first deposit, up to $1,600. To claim the full amount, deposit $8,000 or more, but even a $10 deposit qualifies for bonus funds.
First Bet Offer – 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):
Prefer a secured first bet? Sign up with BetMGM bonus code TOPACTION and place a wager on any college basketball game. If your first bet loses, BetMGM refunds your stake in bonus bets up to $1,500. Bonus bets are credited in five equal bets.
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 rolling out three different March Madness betting promos, giving you the flexibility to pick the Fanatics Sportsbook promo that best suits your betting style, depending on where you are located. Whether you're looking for a bet-and-get deal, No Sweat Bets, or a huge profit boost, these promos add extra value to your wagers.
$300 Bet-and-Get Bonus (Available in AZ, CO, CT, IN, LA, MA, MD, MI, NJ, PA, TN, VA, WV):
New users can claim $300 in bonus bets by taking advantage of this bet-and-get offer. Here’s how it works:
- Place a $10 bet per day for three consecutive days.
- Once you’ve met the requirement, Fanatics Sportsbook credits you with $300 in bonus bets to use across various sports betting markets.
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, and WY):
Fanatics is offering daily No Sweat Bets for 10 straight days, with up to $100 per bet covered. If your qualifying wager doesn’t hit, Fanatics refunds your stake in bonus bets, giving you another shot at cashing in.
300% Profit Boost Token (Exclusive to New York):
For New York bettors, Fanatics Sportsbook is offering a massive 300% Profit Boost Token:
- Wager up to $50 on any college basketball game.
- If your bet wins, Fanatics Sportsbook triples your profit, making this an ideal offer for bettors looking to maximize their returns.
College Basketball March Madness Betting Promos: Alternate Options
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’s Predictive Market offers a fresh, data-driven way to engage with March Madness and other real-world events. Instead of traditional betting, you can trade on market outcomes, speculating on everything from sports results to political events and economic trends.
Sign up with Kalshi promo code ACTION, make $100 in trades, and receive a $10 bonus to continue exploring different markets.
Kalshi operates like a futures trading platform, letting you apply strategy and analysis to predict the outcomes of major events, including NCAA Tournament games. Whether you’re looking to capitalize on March Madness movements or explore broader global trends, Kalshi provides a unique alternative to sports enthusiasts.
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
Sign up with Underdog Fantasy promo code TOPACTION and claim a 50% deposit match bonus, up to $1,000 in extra funds. Use your bonus to draft winning lineups featuring top college basketball players and compete for big prizes.
Whether you're putting together a March Madness lineup or sharpening your skills in daily fantasy contests, this exclusive promo gives you more flexibility to maximize your picks and increase your chances of winning.