As of today, Sunday, March 15, 2026, the NCAA Tournament field is officially set. The action begins on Tuesday and Wednesday with the First Four, which locks in four outside teams into the First Round of the tournament on Thursday. Before wagering on the last NCAAB games of the season, claim more than $7,000 in March Madness betting promos to use on the NCAA Tournament this week.
Wager on the First Four college basketball slate and access more than $7,000 in total bonus value from the best sports betting sites on the market, including bet365, FanDuel, Fanatics Sportsbook, BetMGM, Caesars Sportsbook, DraftKings, Hard Rock Bet, and theScore Bet.
Click the sign-up modules below to register for the latest March Madness betting promos ahead of the First Four, First Round, and all the NCAA Tournament action.
Latest March Madness Betting Promos for NCAA Tournament
| NCAAB Sportsbooks | Promo Code |
|---|---|
| bet365 – $365 Bet-and-Get or $1,000 First Bet Safety Net | TOPACTION |
| FanDuel – Get up to $3,000 Back in Bonus over 10 Days | Click Here |
| Fanatics Sportsbook – Get up to $1,000 Matched in FanCash | ACTION |
| BetMGM – 20% Deposit Match, up to $1,500 in Sports Bonus | TOPTAN1500 |
| Caesars Sportsbook – Bet $1, Double Your Winnings on Next 10 Wagers | ACTION4DYW |
| DraftKings – Bet $5, Get $200 in Bonus Bets + 100% NCAA Tournament Winner Profit Boost | Click Here |
| Hard Rock Bet Promo Code – Get 10 x 100% Profit Boost Tokens | Click Here |
| theScore Bet Promo Code – $1,000 First Bet Reset | ACTNEWS |
Odds & Schedule for First Four on March 17, 18
Here are the updated odds and schedule for the First Four Round of the NCAA Tournament on March 17 & 18:
Tuesday, March 17
- UMBC (-120) vs. Howard (+100) at 6:40 p.m. ET on truTV
- Texas (+100) vs. NC State (-120) at 9:10 p.m. ET on truTV
Wednesday, March 18
- Prairie View (-120) vs. Lehigh (+100) at 6:40 p.m. ET on truTV
- Miami (OH) (+260) vs. SMU (-325) at 9:10 p.m. ET on truTV
Newest March Madness Betting Promos for First Four Round This Week
Claim one sign-up offer from each sportsbook below for more than $7,000 in March Madness betting promos to use on the First Four this week.
bet365 Bonus Code TOPACTION is Best March Madness Betting Promo Today
The bet365 bonus code TOPACTION unlocks up to $1,000 in bonus value when you claim the best March Madness betting promos today. Choose between a $365 bet-and-get promo or $1,000 First Bet Safety Net in AZ, CO, IA, IN, KS, KY, LA, NC, OH, TN, or VA. In PA and NJ, you get a $365 bonus plus extra casino perks or a $150 bet-and-get promo in IL.
How to Get $3,000 March Madness Betting Promo with FanDuel Sportsbook
Don't miss your chance to take advantage of one of the best March Madness betting promos with this link. Use the brand new, updated FanDuel promo code to bet the First Four, First Round, and other NCAAB odds from the tournament. Each day, for 10 days, you get up to $300 in bonus back if your bet doesn't win.
In Indiana and Virginia, you can bet and get up to $1,000 in bonus bets with the sign-up module below.
Bet on First Four Round with Fanatics Sportsbook Promo Code ACTION
Choose from five March Madness betting promos (depending on your location) with the Fanatics Sportsbook promo code ACTION. The most popular promo is the $200 bet-and-get offer. Wager $5 and get $200 in FanCash instantly. The FanCash can be converted to bonus bets or use on official, licensed merchandise. Sign up here and get $200 in FanCash in AZ, CO, CT, DC, IA, IN, KS, KY, LA, MA, MD, MI, MO, NJ, OH, PA, VA, VT, WV, or WY.
Best BetMGM Bonus Code for March Madness
The highest value March Madness betting promo from BetMGM Sportsbook is with the BetMGM bonus code TOPTAN1500. This is a 20% match on your first deposit, up to $1,500 in sports bonus. Use your sports bonus to wager on your favorite events, including NCAA Tournament games this week.
Claim Caesars Sportsbook Promo Code for 10 Profit Boost Tokens
Use the Caesars Sportsbook promo code ACTION4DYW to claim the best March Madness betting promos from Caesars Sportsbook. Sign up with this link, place a $1 first bet, and Caesars Sportsbook provides 10 x 100% Profit Boost Tokens to double your winnings on your next 10 wagers for $25 or less.
DraftKings Promo Code for NCAA Tournament
Unlock one of the best March Madness betting promos for any conference tournament game today by using the DraftKings promo code. Place a first bet on -500 odds or longer. You get $200 in bonus bets instantly plus a 100% Profit Boost Token for the NCAA Tournament.
Get Profit Boost Tokens for First Four on Tuesday with Hard Rock Bet
The Hard Rock Bet promo code provides an essential March Madness betting promo for NJ and MI players. Sign up now and get 10 100% Profit Boost Tokens to double your winnings when you place a $50 or less wager. This is an exclusive offer for NJ and MI bettors.
Use theScore Bet Promo Code ACTNEWS to Wager on March Madness
Finally, theScore Bet promo code ACTNEWS unlocks an additional $1,000 on our list of March Madness betting promos. Place a first bet and get up to $1,000 in bonus funds, if your first wager loses.
Kalshi Promo Code ACTION Provides $10 College Basketball Bonus
Another alternative to the best March Madness betting promos is the Kalshi promo code ACTION. Create a new Kalshi account and make a $10 first trade for a $10 bonus to use on different college basketball markets during the NCAA Tournament this week.
Use Underdog Promo Code TOPACTION as Alternative to March Madness Betting Promos Today
If you are not in a sports betting state or looking to stack a bonus on top of the best March Madness betting promos, use Underdog promo code TOPACTION. Place a $5 first fantasy entry on any First Four predictions and unlock $50 in fantasy bonus entries.
NCAA Tournament Bracket Predictions
Use the best March Madness betting promos above and tail Action Network's expert NCAA Tournament Bracket Predictions or place your own wagers today.
