The top March Madness betting promos have you covered with thousands of dollars in sign-up bonus offers. It's one of the best days of the year, as the First Round of the NCAA Tournament begins at 12:15 p.m. ET.
Use the best March Madness betting promos to claim a welcome bonus from bet365, Caesars Sportsbook, BetMGM, and Fanatics Sportsbook. With the NCAAB odds, you can wager on any college basketball game throughout the tournament.
Be sure to view our March Madness game betting guide before placing your bets.
| Top NCAAB Sportsbooks | March Madness Betting Promos | Sign-Up Link |
|---|---|---|
| bet365 | $150 Bet-and-Get or $1,000 First Bet Safety Net | TOPACTION |
| Caesars Sportsbook | Bet $1, Get $150 in Bonus Bets if You Win | ACTION4BG1 |
| BetMGM | Bet $10, Get $150 in Bonus Bets if You Win | ACTIONGET |
| Fanatics Sportsbook | $300 Bet-and-Get Promo or $1,000 in No Sweat Bets | Activate Now |
March Madness College Basketball Betting Promos: How to Claim Welcome Offers
1. bet365
- bet365 Bonus Code: TOPACTION
- bet365 Promo: $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 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 States Available: AZ, CO, IA, IL, IN, KY, LA, NC, NJ, OH, PA, TN, VA
Use the bet365 bonus code TOPACTION to claim a $1,000 First Bet Safety Net or a $150 bet-and-get promo. With these March Madness betting promos, your first bet must come on a market with -500 odds or longer.
The First Bet Safety Net is a first bet insurance offer. Sign up and place your initial wager on any NCAAB game. If it loses, you get your stake back in bonus bets, up to $1,000. For example, a $1,000 first bet on the VCU moneyline (+120) yields a $2,200 payout if VCU wins or returns $1,000 in bonus bets if it loses.
With the bet-and-get promo, it only takes a $5 first bet to unlock $150 in bonus bets, win or lose. In Pennsylvania, this bet365 promo offers an additional perk of 50 spins for bet365 Casino.
The $150 bet-and-get offer includes a Super Boost in Illinois and Tennessee. Use the bet365 Illinois Super Boost to wager up to $50 on 1+ points scored in the Creighton vs. Louisville game (+100). Similarly, the bet365 Tennessee Super Boost allows you to bet on the Tennessee Volunteers ML (+100) with a max wager of $50.
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
Check out the best March Madness betting promos at Caesars Sportsbook to claim a welcome bonus. Use the Caesars Sportsbook promo code to access a $150 bet-and-get promo or 10 100% Profit Boost Tokens.
With the Caesars Sportsbook promo code ACTION4BG1, you can avail yourself of the $150 sign-up bonus. Caesars Sportsbook requires you to win your $1 initial bet to unlock $150 in bonus bets, issued as six $25 bet credits. Use this welcome bonus in AZ, CO, DC, IA, IL, KY, LA, MD, ME, NY, OH, TN, VA, and WY.
Make a $1 first bet to instantly unlock 10 100% Profit Boost Tokens with the Caesars Sportsbook promo code ACTION4DYW. Each Profit Boost Token doubles your profit on any winning bet, with a maximum wager of $25. The following states can access this promo: AZ, CO, DC, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, NC, NJ, NY, OH, ON, PA, TN, VA, WV, and WY.
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 offers the highest bonus value among the top March Madness betting promos. Use the BetMGM bonus code to claim up to $1,600 in bonus value.
Use the BetMGM bonus code ACTIONGET and place a $10 first bet on any NCAAB game. If your bet wins, you get a payout and $150 in bonus bets. If it doesn’t, you lose your stake and become ineligible for the $150 bonus.
The BetMGM bonus code TOPTAN1600 offers a 20% deposit match—up to $1,600 in sports bonus funds. Therefore, you must deposit $8,000 or more to unlock the full $1,600 bonus. Use this BetMGM promo in AZ, CO, DC, IN, IA, KS, KY, MA, MD, MI, NJ, NC, PA, TN, WV, and WY.
With the BetMGM bonus code TOPACTION, you get a $1,500 first bet offer. Make your initial wager on any college basketball game, and if it loses, you get your stake back in bonus bets, up to $1,500. Use this sign-up bonus in the following states: AZ, CO, DC, IA, IL, IN, LA, KS, KY, MA, MD, MI, NC, NJ, OH, PA, TN, VA, WV, and WY.
4. Fanatics Sportsbook
- Fanatics Sportsbook Promo: Activate Now
- 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
The Fanatics Sportsbook promo features three March Madness betting promos, allowing you to choose your own offer today.
Sign up using the Fanatics Sportsbook promo to claim a $300 bet-and-get promo in the following states: AZ, CO, CT, IN, LA, MA, MD, MI, NJ, PA, TN, VA, and WV. With this promo, you place a daily $10 bet to unlock $100 in bonus bets. Do this for three straight days to claim $300 in bonus bets.
The Fanatics Sportsbook promo offers $1,000 in No Sweat Bets in the following states: AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, NC, NJ, OH, PA, TN, VA, VT, WV, and WY. Over a 10-day span, you get a daily No Sweat Bet, up to $100. If your No Sweat Bet loses, you get it back as bonus bets, up to $1,000.
In New York, you can use the Fanatics Sportsbook promo to unlock a 300% Profit Boost Token. Wager up to $50 on any college basketball game.
Best Alternatives to College Basketball March Madness Betting Promos
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.
Sign up today with the Kalshi promo code ACTION to earn a $10 sign-up bonus. Participate in the Kalshi Predictive Market and trade on any NCAAB market. Make trades worth $100 to unlock your $10 bonus.
2. PrizePicks (DFS)
- PrizePicks Promo Code: ACTIONMAX
- PrizePicks Referral Bonus: Place $5 Lineup, Get $50 Instantly in Bonus Funds
- PrizePicks States Available: AK, AL, AR, AZ, CA, DC, DE, GA, IL, KS, KY, MA, MN, MO, MS, NC, ND, NE, NM, OK, OR, RI, SC, SD, TN, TX, UT, VA, VT, WI, WV, WY
Use the PrizePicks promo code ACTIONMAX and submit a $5 lineup to get $50 instantly in bonus funds. Create a lineup using players from any college basketball game.