Sign up now with the best March Madness bettingpromos to claim thousands in sportsbook bonus funds for tonight's NCAA Tournament games. The Sweet 16 tips off tonight at 7:09 p.m. ET with BYU vs. Alabama, followed by Maryland vs. Florida at 7:39 p.m. ET. The later March Madness Sweet 16 games feature Arizona vs. Duke at 9:39 p.m. ET and Arkansas vs. Texas Tech at 10:09 p.m. ET.
Register with the best March Madness betting promos to get your hands on sign-up bonus offers from the top college basketball betting apps. These March Madness betting promos are available across the country at bet365, Fanatics Sportsbook, BetMGM, and Caesars Sportsbook. It's almost certain that there's an offer that works for your needs with bet-and-gets, first bet promos, and profit boosts to be had for new sign-ups today.
Refer to the March Madness betting promos table below to see all the available offers. Sign up using the links and make your college basketball betting picks for tonight's Sweet 16 NCAA Tournament games.
| College Basketball Betting Apps | Best March Madness Betting Promos | Sign-Up Link |
|---|---|---|
| bet365 | $1,000 First Bet Safety Net OR $150 Bet-and-Get | TOPACTION |
| Fanatics Sportsbook | $1,000 in No Sweat Bets OR Bet $30, Get $300 in Bonus Bets | CLICK HERE |
| BetMGM | Bet $10, Get $150 in Bonus Bets if You Win OR $1,600 First Deposit Match | ACTIONGET |
| Caesars Sportsbook | Get 10 100% Profit Boost Tokens | ACTION4DYW |
March Madness Betting Promos: Claim to Best Sportsbook Promos for the Sweet 16 NCAA Tournament Now
Here is a guide to what we rank as the best March Madness betting promos. Get up to $3,600 in bonus value when you sign up with all of these sportsbook promos for March Madness today. Aside from college basketball, you can also make bets on MLB Opening Day, the NBA, or NHL games tonight or later this week.
1. bet365
- bet365 Bonus Code: TOPACTION
- bet365 Promos: $1,000 First Bet Safety Net or Bet $5, Get $150 in Bonus Bets Win or Lose
- bet365 PA Promo: Bet $5, Get $150 in Bonus Bets + 50 Casino Spins Win or Lose
- bet365 States Available: AZ, CO, IA, IL, IN, KY, LA, NC, NJ, OH, PA, TN, VA
You get to choose one of two March Madness betting promos when you sign up with the bet365 bonus codeTOPACTION.
The bet-and-get offer nets $150 in bonus bets once you make a wager of $5 or more on any betting market with -500 odds or longer. The bet365 sign-up bonus gives you $150 in bonus bets whether your first bet wins or loses. In Pennsylvania, the bet365 bonus code TOPACTION grants an elevated version of this offer. This PA-specific offer nets 50 spins for bet365 Casino slots as an extra perk on top of your bonus bets.
The other promotion from bet365 bonus code TOPACTION is a $1,000 First Bet Safety Net. You get first bet insurance with this promotion: make your first bet on a March Madness betting market. If it loses, you get bonus bets back equivalent to your stake.
2. Fanatics Sportsbook
- Fanatics Sportsbook Promo: Click Here
- Fanatics Sportsbook Bet-and-Get Welcome Offer: Bet $30, Get $300 in Bonus Bets
- Fanatics Sportsbook No Sweat Bets Welcome Offer: $1,000 in No Sweat Bets
- Fanatics Sportsbook NY Welcome Offer: 300% Profit Boost Token
- Fanatics Sportsbook States Available: AZ, CO, CT, DC, IA, IN, KS, KY, LA, MA, MD, MI, NJ, OH, PA, TN, VA, VT, WV, WY
There are multiple March Madness betting promos available from Fanatics Sportsbook. Register today with the Fanatics Sportsbook promo to choose your own offer from the available March Madness betting promos. The promotions accessible to you depend on your location.
$300 Bet-and-Get Offer (Available in AZ, CO, CT, IL, IN, LA, MA, MD, MI, NC, NJ, OH,PA, TN, VA, and WV)
The bet-and-get promo delivers $300 in bonus bets over three days. On each of your first three days with the sportsbook, wager $10 to get $100 in bonus bets. You get the bonus bets no matter the outcome of each bet. Sign up today and bet $10 on the March Madness games today to get $100 in bonus bets.
Up to $1,000 in No Sweat Bets (Available in AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA, MA, MD, MI, NC, NJ, OH, PA, TN, VA, VT, WV, and WY)
The $1,000 in No Sweat Bets offer runs over your first 10 days with the sportsbook. On each of those days, the Fanatics Sportsbook promo banks a $100 No Sweat Bet. Each No Sweat Bet returns up to $100 in bonus bets if it loses, equal to its stake. Your No Sweat Bets must be made on odds of -500 or longer for you to get any bonus bets.
300% Profit Boost Token (Available in NY Only)
If you're in New York the only Fanatics Sportsbook prom0 offer you have access to is a 300% Profit Boost Token. The 300% Profit Boost Token triples the winnings on any given bet. The maximum stake on such a bet is $50.
3. BetMGM
- BetMGM Bonus Code: ACTIONGET
- BetMGM Welcome Offer: Bet $10, Get $150 in Bonus Bets if You Win
- BetMGM Bonus Code: TOPTAN1600
- BetMGM Welcome Offer: 20% First Deposit Match, Up to $1,600 in Sports Bonus
- BetMGM Bonus Code: TOPACTION
- BetMGM Welcome Offer: $1,500 First Bet Offer
- BetMGM States Available: AZ, CO, DC, IA, IL, IN, LA, KS, KY, MA, MD, MI, NC, NJ, OH, PA, TN, VA, WV, WY
The BetMGM bonus code gives access to a choice from several March Madness betting promos. There are three total sportsbook promos here, and you must choose one of the available options, depending on your location.
Bet $10, Get $150 in Bonus Bets If You Win (Available in CO, MI, NJ, PA, and WV)
Activate the BetMGM bonus code ACTIONGET to get a $150 bet-and-get promotion for March Madness games this week. Bet $10 on any available betting market. If your bet wins, you get $150 in bonus bets. The BetMGM promo does not give you any bonus bets if you lose.
20% Deposit Match Up To $1,600 (Available in AZ, CO, DC, IN, IA, KS, KY, MA, MD, MI, NJ, NC, PA, TN, WV, and WY)
The BetMGM bonus codeTOPTAN1600 banks a $1,600 deposit match. This is a 20% first deposit match offer, so you must make a first deposit of $8,000 or more to receive the maximum of $1,600 in sports bonus available. This BetMGM promo has a 10x playthrough requirement. This means you must wager 10x the amount of sports bonus you receive before you can take out any cash.
First Bet Safety Net – Up To $1,500 in Bonus Bets (Available in AZ, DC, IA, IL, IN, LA, KS, KY, MA, MD, NC, OH, TN, VA, and WY)
You get a $1,500 first bet offer from the BetMGM bonus code TOPACTION for any of the available March Madness games. Let's say you sign up and make your first bet on a March Madness game today. A winning bet nets your profit and lets you keep your stake. The promotion kicks in with a losing stake, and your stake is refunded as bonus bets.
4. Caesars Sportsbook
- Caesars Sportsbook Promo Code: ACTION4DYW
- Caesars Sportsbook Welcome Offer: Bet $1, Get 10 100% Profit Boost Tokens
- Caesars Sportsbook 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
The Caesars Sportsbook promo codeACTION4DYW banks 10 100% Profit Boost Tokens for any March Madness Sweet 16 bets. Bet $1 on any available sporting event to get your 100% Profit Boost Tokens instantly.
A 100% Profit Boost Token doubles the winnings on any given March Madness wager. The most you can stake with a 100% Profit Boost Token active is $25, and such a bet has its winnings capped at $2,500.
Best Alternatives to March Madness Sweet 16 Betting Promos
1. Kalshi Predictive Market
- Kalshi Promo Code: ACTION
- Kalshi Welcome Offer: Make $100 in Trades, Get $10 Sign-Up Bonus
- Kalshi States Available: All 50 States + Washington D.C.
Register with Kalshi to make predictions on the potential outcomes featuring the NCAA Tournament. Kalshi also has other markets featuring outcomes from other sports events or other things, such as politics or culture. Sign up with the Kalshi promo code ACTION to get a $10 bonus from Kalshi to make predictions. Spend $100 or more on shares from the platform to get your $10 bonus.
2. Underdog Fantasy
- Underdog Fantasy Promo Code: TOPACTION
- Underdog Fantasy Welcome Offer: 50% Deposit Match, Up to $1,000 in Bonus Funds
- Underdog Fantasy States Available: AL, AK, AZ, AR, CA, DC, DE, GA, IL, KS, KY, MA, MN, MO, NE, NM, NC, ND, OK, OR, RI, SC, SD, TN, TX, UT, VT, VA, WI, WV, WY
Use the Underdog Fantasy promo code TOPACTION to get a 50% deposit match worth up to in bonus cash for the March Madness Sweet 16 games this week. Deposit $2,000 or more with your first transaction to get the full $1,000 in bonus cash.