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.

New DraftKings Customer: SPEND $5, GET $200 IN BONUSES

Bet Now DraftKings Promo

To be eligible for DraftKings Sportsbook and the Promotion, you must be physically located in AR, AZ, CO, CT, DC, IA, IL, IN, KS, KY, LA (select parishes), MA, MD, ME, MI, MO, NC, NJ, NH, NY, OH, OR, PA, PR (residents only), TN, VA, VT, WY, WV, CA-ONT or CA-AB (each an “Eligible Jurisdiction” or, collectively, the “Eligible Jurisdictions”). Must be 21+ years of age or older (18+ if in DC/NH/PR/WY/CA-AB) (19+ in CA-ONT). GAMBLING PROBLEM? CALL 1-800-GAMBLER or 1-800-MY-RESET, (800) 327-5050 or visit gamblinghelplinema.org (MA) Please Gamble Responsibly. 888-789-7777/visit ccpg.org (CT), or visit www.mdgamblinghelp.org (MD), 1-800-981-0023 (PR). 21+ and present in most states. (18+ DC/NH/PR/WY). Void in CAN. Eligibility restrictions apply. On behalf of Boot Hill Casino (KS). Pass-thru of per wager tax may apply in IL. 1 per new DraftKings customer. $5+ first-time bet req. Max. $200 issued as non-withdrawable Bonus Bets. Stake removed from payout. Reward issued as $50 in Bonus Bets every 7 days via click-to-claim for 21 days. Bonus Bets and click-to-claims expire 7 days (168hrs) after issuance. Terms: Promos | DraftKings Sportsbook . Ends 9/20/26 at 11:59 PM ET. Sponsored by DK.

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.

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 $1500 in Bonus Bets Paid Back if your First Bet Does Not Win

Bet Now BetMGM Promo

Gambling problem? Call 1-800-GAMBLER or 1-800-MY-RESET (Available in the US) 877-8-HOPENY or text HOPENY (467369) (NY) 1-800-327-5050 (MA), 1-800-BETS-OFF (IA), 1-800-981-0023 (PR). 21+ only. Please Gamble Responsibly. See BetMGM.com for Terms. First Bet Offer for new customers only (if applicable). Subject to eligibility requirements. Bonus bets are non-withdrawable. In partnership with Kansas Crossing Casino and Hotel. Promotional offers not available in Mississippi, Massachusetts, New York, Ontario, or Puerto Rico.

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. 

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.

New Users – Get $350 in Bonus Bets when you wager $5 for 7 days

Bet Now

Gambling Problem? Call 1-800-GAMBLER or 1-800-MY-RESET. Call 1-888-789-7777 or visit ccpg.org/chat (CT). Hope is here. GamblingHelpLineMA.org or call (800) 327-5050 for 24/7 support (MA). Visit www.mdgamblinghelp.org (MD). Call 1-877-8HOPE-NY or text HOPENY (467369) (NY). 21+ (18+ D.C., KY, WY) and present in select states (for KS, in affiliation with Kansas Star Casino). First online real money wager only. Min $5 wager required for 7 consecutive days.$5 first deposit required. Bonus issued as nonwithdrawable bonus bets which expire 7 days after receipt. Restrictions apply. See terms at sportsbook.fanduel.com. Call 1-877-770-7867 (LA). ™/© 2026 MLB

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.

watcH: march madness betting preview

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