Here Are The Best March Madness Sportsbook Promos

March Madness is one of the best times in the sporting calendar to try out some promos from a new sportsbook.
Considering there are multiple weeks of non-stop, high-stakes hardwood action, it’s no surprise sportsbooks offer a host of betting promos for first-time users throughout March Madness season!
With that in mind, TheLines.com has highlighted the top new-customer promos from industry-leading sportsbooks.
DraftKings March Madness Promo Code: Up To $1,200 in Bonuses
DraftKings Sportsbook is consistently in the upper echelon of sportsbooks thanks to its wide array of betting markets, competitive odds and user-friendly interface that builds on its long-tenured and wildly successful daily fantasy sports product.
New DraftKings customers can qualify for a three-pronged bonus: The first component is a $50 bonus bet when you make an initial deposit of at least $5; the second is $150 bonus bets with a first-time bet of at least $5; and the third is a 20% first-deposit match up to $1,000, although that has a 25x playthrough requirement.
Bet $5 Get $200 in Bonus Bets
PLUS Get a $50 Bonus Bet on Deposit
PLUS up to $1,000 Deposit Bonus
Gambling Problem? Call 1-800-GAMBLER
Caesars March Madness Promo Code THELINESDYW: Get 10 100% Profit Boost Tokens
Caesars Sportsbook is a well-established gaming brand that boasts a formidable presence throughout the US regulated sports betting market. It offers customers an extensive selection of betting options that includes many international events, along with an abundance of prebuilt game and prop parlays.
To claim Caesars’ promo, enter promo code THELINESDYW and receive 10 100% profit boost tokens after making an initial wager of as little as $1, whether that bet wins or loses. Tokens are good for 14 days, and the maximum wager amount they can be applied to is $25.
- Stream NFL Games In-App for Free
- 21+ Gambling problem? Call 1-800-GAMBLER
- Use Promo Code: THELINESDYW
BetMGM March Madness Bonus Code THELINES: First-Bet Offer up to $1,500
BetMGM is another highly recognizable name in the gaming space and offers new and existing customers competitive odds and a robust selection of betting markets.
New customers can use promo code THELINES to receive bonus bets of up to $1,500 if their first bet loses.
Up to $1,500 in Bonus Bets if Your First Bet Doesn't Win*
*Bonus Bets Expire in 7 Days. One New Customer Offer Only. Add’l terms. 21+. Gambling Problem? Call 1-800-GAMBLER
Use Bonus Code: THELINES
Bet365 March Madness Bonus Code THELINES: Two Choices
Bet365 has brought its innovative sportsbook offerings stateside after building a formidable reputation internationally. It offers new customers who enter promo code THELINES a choice between two new-customer betting promos:
The first involves making a minimum deposit of $10 and placing an initial bet of $5 on a wager with -500 odds or longer, which entitles the customer to $150 in bonus bets, win or lose. The second is a first-bet insurance offer that also requires a minimum deposit of $10 and initial bet of $5. Then, if your first bet loses, you’ll get your bet amount refunded in bonus bets up to $1,000.
- Bet $5 Get $150 in Bonus Bets Win or Lose
- OR First Bet Safety Net up to $1,000
- 30% Extra on Same Game Parlay Profit
- T&Cs Apply. Gambling Problem? Call or text 1-800-GAMBLER 21+
- Use Bonus Code: THELINES
FanDuel March Madness Promo Code: $200 In Bonus Bets If Your Bet Wins
Much like its long-time DFS rival DraftKings, FanDuel has shot to the top of the US regulated sports betting space while leveraging many of the foundational aspects of its success in that space.
Bettors who wish to try the industry-leading operator’s offerings can also participate in a betting promo that affords them $200 in bonus bets on a winning initial bet of at least $5. Bonus bets are valid from seven days of receipt.
Get $250
- Bet $5, Get $250 in Bonus Bets if Your Bet Wins
- Available on Desktop, Android & iOS
- Gambling Problem? Call 1-800-GAMBLER. 21+
- To Claim: Click Play Now
How To Claim March Madness Betting Promos
Claiming a sportsbook promo is a relatively straightforward and streamlined process. A sportsbook customer first completes the account creation process, which typically requires submitting basic personal identifying information.
An initial minimum deposit, usually $5 or $10, is also typically required before a sportsbook bonus can be claimed. Once that is completed, the sportsbook customer should enter a promo code in the appropriate field if that is required to claim the offer. However, there are other instances where a promo code is not necessary to claim the welcome bonus, but rather just a click on a hyperlink for the bonus offer does the trick.
March Madness Best Bet
Duke To Win National Championship (+340 on DraftKings Sportsbook)
While Florida is undeniably a tempting longer-shot pick — the Gators are currently as high as +750 on FanDuel Sportsbook — the Gators’ defense may ultimately not be able to hold up its end of the bargain. In contrast, the Blue Devils — the slight favorites over Auburn to win it all just a handful of days before Selection Sunday — are the epitome of a complete team, as well as a surging one.
Duke finished regular-season play with eight consecutive wins and victories in 24 of its last 25 overall. Jon Scheyer’s squad heads into the ACC Tournament ranked No. 9 in the country in points per game (83.5) and No. 4 in points allowed (61.4). Duke also finished No. 8 in 3-point shooting (38.7%) while finishing in the top 15 in turnovers per game (9.5), further corroboration of the Blue Devils’ ability to excel in essentially every facet.
With Cooper Flagg, Kon Knueppel and Tyrese Proctor leading the way, Duke can arguably keep pace on the scoreboard with any team, while fifth-year senior Sion James is a highly efficient “fourth wheel” who drained a blistering 53.9% of his attempts, including 42.6% from behind the arc.
With depth, height and balance on their side, the Blue Devils make for a formidable bet to take home national championship hardware at the conclusion of March Madness.
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