Sign up with the best March Madness betting promos today to wager on Sweet 16 college basketball matchups in the 2025 NCAA Tournament. There is $3,600 in sportsbook bonus offers up for grabs to claim and bet on every college basketball game this week. Get a combination of first bet offers, bet-and-get promos, and more from these top March Madness betting promos.
All the March Madness betting promos in the table below are housed by the best sportsbooks to bet on college basketball with, including bet365, BetMGM and Caesars Sportsbook. Register with these March Madness sportsbook promos today to bet on the Sweet 16 now.
| Top NCAAB Sportsbooks | March Madness Betting Promos | Sign-Up Link |
|---|---|---|
| bet365 | $150 Bet-and-Get or $1,000 First Bet Safety Net | TOPACTION |
| BetMGM | Bet $10, Get $150 in Bonus Bets if You Win | ACTIONGET |
| Caesars Sportsbook | Bet $1, Get 10 100% Profit Boost Tokens | ACTION4DYW |
| Fanatics Sportsbook | $300 Bet-and-Get Promo or $1,000 in No Sweat Bets | Click Here |
Top March Madness Betting Promos: Claim These Sportsbook Promos and Bet on Sweet 16 Games This Week
Sign up now with the best March Madness betting promos and place NCAA Tournament bets on Thursday's Sweet 16 matchups like Maryland vs. Florida at 7:39 p.m. ET on TBS or Arizona vs. Duke at 9:39 p.m. ET on CBS.
bet365
Click here to register with the bet365 bonus code TOPACTION and either one of the best March Madness betting promos. Sign up with a $1,000 First Bet Safety Net and get the amount of your first bet issued back in bonus bets if you lose, up to $1,000. Or choose $150 in guaranteed bonus bets that unlock once your $5+ first bet on March Madness settles, win or lose.
In Pennsylvania, click here to sign up with the $150 bet-and-get bet365 promo with an additional perk of 50 casino spins. This bet365 sign-up bonus is exclusively available in PA. Regardless of which of these March Madness betting promos you sign up with, your first bet must have -500 or longer odds to qualify (such as +100 or -100, but not -700 or -1000).
- Click either sign-up module below to register in AZ, CO, IA, IL, IN, KY, LA, NC, NJ, OH, TN, and VA.
- Use the sign-up module below to sign up in PA.
BetMGM
Sign up with the BetMGM bonus code today to redeem one of the three top March Madness betting promos on the market. The BetMGM bonus code ACTIONGET is a $150 bet-and-get promo which unlocks $150 in bonus bets, but only if your $10+ first bet wins. I advise you to bet on a heavy favorite to give yourself a good shot to win your bonus bets. Click here to sign up with this BetMGM promo.
The only deposit match promo on this list of March Madness betting promos is available with this link and the BetMGM bonus code TOPTAN1600. Get 20% of your first cash deposit matched in sports bonus funds. Get $1,600 in sports bonus funds with a $8,000 cash deposit. The third option you have is to click this link and sign up with the BetMGM bonus code TOPACTION. Get the amount of your first bet issued back in bonus bets if you lose with this first bet on the house, up to $1,500.
- Click the offer module below to sign up in CO, MI, NJ, PA, and WV.
- Click the offer module below to register in AZ, CO, DC, IN, IA, KS, KY, MA, MD, MI, NJ, NC, PA, TN, WV, and WY.
- Use the offer module below to sign up in AZ, CO, DC, IA, IL, IN, LA, KS, KY, MA, MD, MI, NC, NJ, OH, PA, TN, VA, WV, and WY.
Caesars Sportsbook
One of the March Madness betting promos that stands out from the competition is the Caesars Sportsbook promo code. Click this link and place a $1+ first bet on March Madness and instantly unlock 10 100% Profit Boost Tokens.
Use these Profit Boost Tokens to double your winnings on bets over the next 14 days. Note $25 is the most you can wager on a boosted bet, and $2,500 is the most you can win from a boosted bet.
- Use the sign-up module below to register in AZ, CO, DC, IA, IL, IN, KS, KY, LA, MA, MD, ME, MI, NC, NJ, NY, OH, ON, PA, TN, VA, WV, and WY.
Fanatics Sportsbook
Claim one of the March Madness betting promos by signing up with the Fanatics Sportsbook promo ACTION4DYW. Click here and net a $300 bet-and-get promo that runs each of your first three days. Bet $10+ on March Madness today and unlock $100 in bonus bets. Do this each of your next two days to get a total of $300 in bonus bets, but make sure your $10+ bet each day has -500 or longer odds.
Use this link instead to sign up with a $1,000 No Sweat Bets promo. Make a No Sweat Bet on March Madness today with -500 or longer odds and get the amount of your bet back in bonus bets if you lose, up to $100. Do this your next nine days as well to make up to $1,000 in No Sweat Bets. In New York, you must click this link to claim a 300% Profit Boost Token when you sign up for your new Fanatics Sportsbook account.
- Use the sign-up module below to register in AZ, CO, CT, IL, IN, LA, MA, MD, MI, NC, NJ, OH, PA, TN, VA, and WV.
- Click the sign-up module below to register in AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, NC, NJ, OH, PA, TN, VA, VT, WV, and WY.
- Click the offer module below to sign up in NY.
Sign Up With These Alternatives to March Madness Betting Promos
Kalshi
Sign up with Kalshi as an alternative choice to March Madness betting promos. Click on the sign-up module below to register with theKalshi promo codeACTION. Unlock a $10 bonus to use on Kalshi in all 50 states and Washington D.C. when you make $100 in total trades. To make a trade, predict a March Madness outcome (like who will win March Madness, who will advance to the next round, etc.) and put money on your prediction.
- Use the sign-up module below to register in all 50 states and Washington D.C.
PrizePicks
Use this link to sign up with the PrizePicks promo code ACTIONMAX and play on one of the best daily fantasy sports (DFS) apps. Make a $5+ first lineup of March Madness player picks and submit it to unlock $50 in instant bonus cash, no strings attached. Player picks consist of you predicting if players perform better or worse than their projected statistics to try and win money.
Click the offer module below to sign up in AL, AZ, IL, KS, VA, WY, DC, DE, MA, AK, AR, CA, GA, KY, MN, MO, MS, NE, NM, NC, ND, OK, OR, RI, SC, SD, TN, TX, UT, VT, WI, WV, and WY.