Selection Sunday is set for tomorrow and you can get started today with the best March Madness betting promos. In total, these sign-up offers combine for more than $6,500 in bonuses. The best March Madness betting promos can be found at top online sports betting sites like bet365, BetMGM, Caesars Sportsbook, and Fanatics Sportsbook. You can also take advantage of an alternative DFS sign-up bonus at Underdog Fantasy.
Take a look at the chart below for more information about the best March Madness betting promos to claim and use for bets on NCAA basketball games:
| Best NCAAB 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 | $1,000 in No Sweat Bets or $300 Bet-and-Get | Click Here |
Best March Madness Betting Promos Combine for More Than $6,500 in Bonuses
Let's take a look at each of the best March Madness betting promos available to claim today. Keep in mind that you can only claim one sign-up bonus at each sportsbook.
bet365
| bet365 Promo | States Available | bet365 Bonus Code |
|---|---|---|
| $1,000 First Bet Safety Net | AZ, CO, IA, IL, IN, KY, LA, NC, NJ, OH, TN, VA | TOPACTION |
| Bet $5, Get $150 in Bonus Bets | AZ, CO, IA, IN, KY, LA, NC, NJ, OH, VA | TOPACTION |
| $150 Bet & Get + 50 Casino Spins | PA | TOPACTION |
Sign up with the bet365 bonus code TOPACTION to get a choice between a $1,000 First Bet Safety Net and a $150 bet-and-get offer. The First Bet Safety Net delivers up to $1,000 in bonus bets if your first bet loses. The bet-and-get requires a $5+ initial wager in exchange for $150 in bonus bets, win or lose. If you register with the bet365 bonus code TOPACTION in Pennsylvania, you get the $150 bet-and-get offer plus 50 spins at bet365 Casino.
BetMGM
| BetMGM Promo | States Available | BetMGM Bonus Code |
|---|---|---|
| Get a 20% First Deposit Match Up to $1,600 in Sports Bonus | AZ, CO, DC, IN, IA, KS, KY, MA, MD, MI, NJ, NC, PA, TN, WV, WY | TOPTAN1600 |
| Get Up to $1,500 Back in Bonus Bets if Your First Bet Doesn't Win | IL, IN, IA, LA, KS, KY, OH, TN, WY | TOPACTION |
There are two different March Madness betting promos available across legal BetMGM states today. When you register with the BetMGM bonus code TOPTAN1600, you receive a 20% deposit match of up to $1,600 in sports bonus. This offer has a 10x rollover requirement that must be fulfilled within 30 days of initiating your first deposit.
Use the BetMGM bonus code TOPACTION during sign-up instead to get up to $1,500 back in bonus bets if your initial wager loses. Any bonus you receive is distributed in five equal increments and expires seven days after receipt.
Caesars Sportsbook
| Caesars Sportsbook Sign-Up Bonus | States Available | Caesars Sportsbook Promo Code |
|---|---|---|
| Bet $1, Get $150 in Bonus Bets If You Win | AZ, CO, DC, IA, IL, KY, LA, MD, ME, NY, OH, TN, VA, WY | ACTION4BG1 |
| Bet $1+, Get 10 100% Profit Boost Tokens | AZ, CO, DC, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, NC, NJ, NY, OH, ON, PA, TN, VA, WV, WY | ACTION4DYW |
Caesars Sportsbook also has two different March Madness betting promos available to new sign-ups. Use the Caesars Sportsbook promo code ACTION4BG1 to secure a $150 bet-and-get offer. Place your first bet for $1 or more and get back $150 in bonus bets if it wins. Instead of this offer in most states, use the Caesars Sportsbook promo code ACTION4DYW and place a $1+ first bet for 10 100% Profit Boost Tokens.
Fanatics Sportsbook
| Fanatics Sportsbook Promo | States Available | Sign-Up Link |
|---|---|---|
| Bet and Get up to $1,000 in No Sweat Bets | AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, NC, NJ, OH, PA, TN, VA, VT, WV, WY | Click Here |
| Bet $30, Get $300 in Bonus Bets | AZ, MI, NJ, PA | Click Here |
| Sign Up and Get a 300% Profit Boost Token | NY | Click Here |
Depending on your location, claim one of three March Madness betting promos at Fanatics Sportsbook. In most states, the Fanatics Sportsbook promo provides up to $1,000 in No Sweat Bets, evenly spread across your first 10 days on the app. Opt-in daily and get back up to $100 in bonus bets if your qualifying wager loses.
If you sign up in AZ, MI, NJ, or PA, you receive up to $300 in bonus bets with three separate bet-and-get offers across your first three days on the app. Essentially, each day delivers a bet $10, get $100 in bonus bets offer when you opt-in.
New York customers sign up and get a 300% Profit Boost Token which can be used to place bets on any event, including NCAA basketball.
Alternative to Best March Madness Betting Promos: Underdog Fantasy (DFS)
| Underdog Fantasy Sign-Up Bonus | States Available | Underdog Fantasy Promo Code |
|---|---|---|
| Get Up to $1,000 Bonus Cash When You Make Your First Deposit | AL, AK, AR, CA, DC, GA, IL, IN, KS, ME, MN, MS, NE, NM, NC, ND, NY, OK, OR, RI, SC, SD, TX, UT, VA, VT, WI, WY | TOPACTION |
Even if online sports betting is not legal in your state yet, you can claim a sign-up bonus at a DFS alternative like Underdog Fantasy. Use the Underdog Fantasy promo code TOPACTION for a 50% deposit match offer of up to $1,000 in bonus cash.