The NCAA tournament continues on Wednesday night with a pair of First Four matchups, and you can sign up for a new account at top online sportsbooks to secure the best March Madness betting promos. Collectively, the best online sports betting sites are offering more than $6,000 in sign-up bonuses via the top March Madness betting promos.
Get started today by wagering on Mt. St. Mary's vs. American at 6:40 p.m. ET and Xavier vs. Texas at 9:10 p.m. ET. Check out the chart below for more information regarding the best March Madness betting promos:
| 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 | Bet $10, Get $150 in Bonus Bets if You Win | ACTIONGET |
| 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 $6,000 in Bonuses
Register today at some of the top online sports betting sites in the industry to claim your share of the best March Madness betting promos. Let's take a look at how these sign-up bonuses work.
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 |
| $200 Combined Bet & Get Offer | IL | TOPACTION |
| $200 Combined Bet & Get Bonus | TN | TOPACTION |
| $150 Bet & Get + 50 Spins | PA | TOPACTION |
When you sign up with the bet365 bonus code TOPACTION today, claim one of five different March Madness betting promos depending on your state. In a majority of locations, get a choice between a $1,000 First Bet Safety Net and a $150 bet-and-get offer.
New users in IL receive a $150 bet-and-get and $50 bonus if more than one point is scored in the first game of March Madness on March 20. TN sign-ups get the $150 bet-and-get and a $50 bonus if Tennessee wins their Round 1 matchup in the tournament. If you register in PA, you receive the $150 bet-and-get and 50 casino spins.
BetMGM
| BetMGM Promo | States Available | BetMGM Bonus Code |
|---|---|---|
| $150 Bet-and-Get | CO, MI, NJ, PA, WV | ACTIONGET |
| $1,600 Deposit Match Offer | AZ, CO, DC, IN, IA, KS, KY, MA, MD, MI, NJ, NC, PA, TN, WV, WY | TOPTAN1600 |
| $1,500 First Bet Promo | AZ, CO, DC, IA, IL, IN, LA, KS, KY, MA, MD, MI, NC, NJ, OH, PA, TN, VA, WV, WY | TOPACTION |
There are three different March Madness betting promos to choose from as a new user at BetMGM, with each promo available in a different set of states. Register with the BetMGM bonus code ACTIONGET for a $150 bet-and-get. Place a $5+ first bet and get $150 in bonus bets if your bet wins. This offer is only available in five states.
If you are located in most legal BetMGM states, use the BetMGM bonus code TOPTAN1600 for a 20% deposit match of up to $1,600 in sports bonus or BetMGM bonus code TOPACTION for a $1,500 first bet offer.
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 offers a choice between a pair of March Madness betting promos to new customers in most states. When you register with the Caesars Sportsbook promo code ACTION4BG1, claim a $150 bet-and-get that requires a $1+ first bet in exchange for $150 in bonus bets if you win.
If you sign up with the Caesars Sportsbook promo code ACTION4DYW, place a $1+ first bet and get 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 |
Fanatics Sportsbook offers some of the most unique March Madness betting promos to claim today. The Fanatics Sportsbook promo in most states yields 10 days of up to $1,000 in No Sweat Bets. Get back up to $100 in bonus bets if your bet loses daily when you opt-in and place a bet at -500 odds or longer to qualify.
In AZ, MI, NJ, and PA, get a $300 bet-and-get offer that spans across three days. Opt-in daily and receive three separate bet $10, get $100 in bonus bets offers. In NY, sign up and get a 300% Profit Boost Token.
Alternative to Best March Madness Betting Promos: Kalshi
| Kalshi Sign-Up Bonus | States Available | Kalshi Promo Code |
|---|---|---|
| Trade on Sports & Politics – Get a $10 Bonus with Our Code | AL, AK, AZ, AR, CA, CO, CT, DE, FL, GA, HI, ID, IL, IN, IA, KS, KY, LA, ME, MD, MA, MI, MN, MS, MO, MT, NE, NV, NH, NJ, NM, NY, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WA, WV, WI, WY, DC | ACTION |
Kalshi represents an excellent alternative if online sports betting is not legal in your state yet. Register now with the Kalshi promo code ACTION to secure a $10 bonus once you make $100 in total trades.