Best March Madness Betting Sites 2026 - Best NCAAB Sportsbooks
Updated May 8, 2026
Updated May 8, 2026
March is one of the biggest betting months of the year, driven by the intensity of the annual college basketball tournament. When betting on March Madness action, choosing the right sportsbook can significantly impact your experience and your results. This guide breaks down the best March Madness betting sites in 2026, based on our real testing, bonus value, and features specifically useful for betting on March basketball.
Sportsbook | Best For | Welcome Offer |
|---|---|---|
BetMGM | Overall value | Up To $1500 in Bonus Bets Back if your First Bet Does Not Win |
bet365 | Early Win Promos | Bet $10, Get $365 in Bonus Bets Win or Lose Gambling Problem? Call 1-800-GAMBLER. Deposit required. Paid in Bonus Bets. Bonus Bets wager excluded from returns. New Customers only. T&Cs, time limits and exclusions apply. |
FanDuel | Beginners | Get $350 in Bonus Bets Guaranteed - When You Bet $5 for 7 Days |
Caesars | High-value bets | Bet $1, Double Your Winnings 10x |
Fanatics Sportsbook | Rewards | 10 x $100 Bet Match In FanCash |
Unlike generic lists, our rankings are based on hands-on testing during March Madness betting conditions, including:
This matters because March Madness betting is different from regular-season wagering:
You can find out more about how we rank online sportsbooks to get more insight into our testing process.
Our team of sports betting experts at ATS has compiled a list of the best March Madness betting sites. Continue reading to find out more about each of those US sportsbooks, and what makes them one of the best sports betting destinations in the industry for the NCAA Tournament and beyond.
Gambling Problem? Call or TEXT 1-800-Gambler 21+
4.5/5
✓ Any Sport Odds Boosts
✓ Supercharge your SGP
✓ Easy Parlay Builder
Gambling Problem? Call or TEXT 1-800-Gambler 21+
Claim Bonus
Promo Code: ATSBONUS1500
Key strengths:
Best for: Bettors who want a mix of value, usability, and strong promos.
4.8/5
✓ Early Payouts
✓ 100% Parlay Boost
✓ Daily LineUps
Claim Bonus
Promo Code:
Key strengths:
Best for: Bettors who don't want to worry about their team blowing a big lead.
Gambling Problem? Call or TEXT 1-800-Gambler 21+
5/5
✓ NBA Choose Your Own Reward
✓ SGP Profit Boosts
✓ FanDuel RG NBA Sweepstakes
Gambling Problem? Call or TEXT 1-800-Gambler 21+
Claim Bonus
Promo Code: Click To Claim
Key strengths:
Best for: New bettors entering during March Madness.
Gambling Problem? Call or TEXT 1-800-Gambler 21+
4.3/5
✓ Caesars Rewards
✓ Daily Profit Boosts
✓ NFL Live Streaming
Gambling Problem? Call or TEXT 1-800-Gambler 21+
Claim Bonus
Promo Code:
Key strengths:
Best for: Experienced bettors placing larger bets.
10 x $100 Bet Match In FanCash
Gambling Problem? Call or TEXT 1-800-Gambler 21+
5/5
🏆 FanCash Rewards
🏈 Fair Play Protection
💰 Instant Withdrawals
Gambling Problem? Call or TEXT 1-800-Gambler 21+
Claim Bonus
Promo Code: Click To Claim
Key strengths:
Best for: Bettors who want long-term rewards value.
Not all sportsbooks perform equally during March. Here’s what separates the best from the rest:
March Madness drives massive traffic spikes. The best sportsbooks:
Look for:
Top sportsbooks offer:
Winning during March is great, but getting paid quickly is better. The best March Madness betting sites pay out quickly and via a number of different banking methods like PayPal, Venmo, and bank transfers.
Lines move quickly during March tournaments. Early bets often provide better value, but bettors can always benefit from waiting to get the best number on a bet they are interested in making if the line is moving in the opposite direction.
One of my biggest tips for all sports betting is to use accounts at multiple sportsbooks. Having accounts at multiple sportsbooks lets you:
March Madness is known for upsets. Blindly backing favorites is a common mistake. But blindly backing underdogs isn't a great plan either. Bettors should make sure to evaluate every game on a case-by-case basis to make the smartest possible wagers when the college basketball tournament rolls around.
The legality of March Madness betting, and sports betting as a whole, varies on a state by state basis. Bettors should familiarize themselves with the laws in each state they live in or otherwise plan to bet in.
There are several quality sportsbooks worth using during March Madness. See the above list for our top picks, which include popular sites like BetMGM, bet365, FanDuel, and many more.
There are countless ways to bet on March Madness, from traditional markets like points spreads and totals, to exotic prop betting markets and futures wagers.
Yes, most states that have legalized sports betting offer some sort of mobile betting option. However, this can vary on a state-by-state basis as well.
Some sportsbooks do require a promo code to use a March Madness sportsbook promo, while others do not. Any promo codes that are needed can be found in our list of promotions above in this guide.
March Madness is scheduled to take place during the final two weeks of March and the first week of April each year.
Jay Sanin is the GM and Head of Sports at ATS.io. He has been writing about sports gambling since 2013, handicapping tens of thousands of sporting events. He plays sides and totals aggressively across most sports and is more selective in player prop markets. He does his own modeling across most sports, and his family is jealous of how much time he spends on his precious spreadsheets.
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