Claim the best March Madness betting promos for $3,700+ in sign-up offers from the best sports betting sites to use on the First Round games today. The First Round begins with Creighton vs. Louisville at 12:15 p.m. ET and concludes with UNC Wilmington vs. Texas Tech at 10:10 p.m. ET.
Our list of the best March Madness betting promos features the top sportsbooks and betting apps on the market today, such as bet365 and BetMGM. You can access one welcome offer or promo from each book, totaling more than $3,700 in bonus value to use on college basketball.
Sign up now and read the chart below to claim the best March Madness betting promos and bet on the First Round today:
| Top College Basketball Sportsbooks | Best March Madness Betting Promos | Sign-Up Link |
|---|---|---|
| bet365 | $1,000 First Bet Safety Net or $150 Bet-and-Get | TOPACTION |
| BetMGM | $1,600 Deposit Match | TOPTAN1600 |
| Caesars Sportsbook | Bet $1, Get $150 in Bonus Bets If You Win | ACTION4BG1 |
| Fanatics Sportsbook | Bet $30, Get $300 in Bonus Bets or $1,000 in No Sweat Bets | Click Here |
Best College Basketball March Madness Betting Promos Today
When you maximize one welcome promo from each sportsbook on the list of March Madness betting promos, you get $3,700+ in total bonus value:
1. bet365
- bet365 bonus code: TOPACTION
- bet365 sign-up bonus: $1,000 First Bet Safety Net
- bet365 bonus code: TOPACTION
- bet365 sign-up bonus: Bet $5, Get $150 in Bonus Bets Win or Lose
Choose between the two bet365 March Madness betting promos above in AZ, CO, IA, IN, KY, LA, NC, NJ, OH, or VA with the bet365 bonus code TOPACTION. The $1,000 First Bet Safety Net covers your first bet on the platform, up to $1,000 in bonus bets, if it loses. Alternatively, place a $5 first bet on -500 odds or longer to get $150 in bonus bets, win or lose.
Additionally, bet365 Sportsbook is now live in Illinois and Tennessee. In each respective state, you can sign up for the Bet $5, Get $150 in Bonus Bets Win or Lose offer with the sign-up module below. Further, users in both states get an additional $50 odds boost bonus to increase the offer to $200 available.
In Pennsylvania, use the same bet365 bonus code TOPACTION for an elevated version of the $150 bet-and-get promo. You place a $5 first bet on -500 odds or longer and get $150 in bonus bets plus 50 spins, win or lose, to bet365 Casino.
2. BetMGM
- BetMGM bonus code: ACTIONGET
- BetMGM promo: Bet $10, Get $150 in Bonus Bets If You Win
- States Available: CO, MI, NJ, PA, WV
- BetMGM bonus code: TOPTAN1600
- BetMGM promo: 20% deposit match, up to $1,600 in sports bonus
- States Available: AZ, CO, DC, IN, IA, KS, KY, MA, MD, MI, NJ, NC, PA, TN, WV, WY
- BetMGM bonus code: TOPACTION
- BetMGM promo: Get up to $1,500 back in bonus bets if your first bet doesn't win
- States Available: AZ, DC, IA, IL, IN, LA, KS, KY, MA, MD, NC, OH, TN, VA, WY
There are various March Madness betting promos available with the corresponding BetMGM bonus code:
Register now with the BetMGM bonus code ACTIONGET for a $150 bet-and-get promo in five states. You place a $10 first bet and get $150 in bonus bets if your first bet wins.
Use the BetMGM bonus code TOPTAN1600 for a 20% match on your first deposit. Access the full $1,600 in sports bonus with a maximized $8,000 deposit. Otherwise, apply the BetMGM bonus code TOPACTION for a $1,500 first bet offer. If your first bet loses, you get bonus bet credits to reimburse your first bet loss, up to $1,500.
3. Caesars Sportsbook
- Caesars Sportsbook promo code: ACTION4BG1
- Caesars Sportsbook welcome offer: Bet $1, Get $150 in Bonus Bets If Your Bet Wins
- States Available: AZ, CO, DC, IA, IL, KY, LA, MD, ME, NY, OH, TN, VA, WY
- Caesars Sportsbook promo code: ACTION4DYW
- Caesars Sportsbook welcome offer: Bet $1+, Get 10 100% Profit Boost Tokens
- 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
Choose between multiple Caesars Sportsbook promo code offers among the March Madness betting promos, depending on your legal sports betting location.
The Caesars Sportsbook promo code ACTION4BG1 provides $150 in bonus bets if your $1 first bet wins. You can place $1 on a heavily-favored line for a better chance at the bonus bets.
Alternatively, use the Caesars Sportsbook promo code ACTION4DYW to get 10 100% Profit Boost Tokens with your $1 first bet, regardless of the bet outcome. Use your Profit Boost Tokens within 14 days by opting in on your betslip and placing a wager for $25 or less. Your profit doubles if your profit-boosted wager wins.
4. Fanatics Sportsbook
- Fanatics Sportsbook promo: Click here for the Bet $30, Get $300 in Bonus Bets offer
- States Available: AZ, CO, CT, IN, LA, MA, MD, MI, NJ, PA, TN, VA, WV
- Fanatics Sportsbook promo: Use this link for $1,000 in No Sweat Bets
- States Available: AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, NC, NJ, OH, PA, TN, VA, VT, WV, WY
- Fanatics Sportsbook promo: Click here for a 300% Profit Boost Token
- States Available: NY
In multiple sports betting locations, you get to choose your Fanatics Sportsbook promo as part of the March Madness betting promos.
In AZ, CO, CT, IN, LA, MA, MD, MI, NJ, PA, TN, VA, or WV, you place a $10 bet each day to get $100 in bonus bets, no matter how the bet settles. This adds up to $300 in bonus bet value over the three days of the promotion.
Alternatively, opt for the $1,000 in No Sweat Bets over the first 10 days of opening your new account. Each day, maximize the promo with a $100 No Sweat Bet. If your bet loses, you get $100 in bonus bets to reimburse your loss.
Lastly, in New York, sign up for a 300% Profit Boost Token. Opt in on your betslip and place a wager for $50 or less. If your bet wins, your profit is tripled from the Profit Boost Token.
Alternate Options to the Best March Madness Betting Promos
Kalshi and Underdog Fantasy are great alternatives to the best March Madness betting promos:
Kalshi Promo Code ACTION
Kalshi is a trading platform available in all 50 states plus DC. You make trades on the outcomes of certain events for cash. Register with the Kalshi promo code ACTION and make your first $100 in trades to get a $10 bonus.
Underdog Promo Code TOPACTION
If you are located outside of a legal sports betting state, get in on college basketball action with Underdog promo code TOPACTION. Make a first deposit of any amount, and get a 50% match, paid in bonus cash, up to $1,000.
Sign up today with Underdog Fantasy in AK, AL, AR, CA, DC, GA, IL, IN, KS, ME, MN, MS, NE, NM, NC, ND, OK, OR, RI, SC, SD, TX, UT, VA, VT, WI, and WY.