Now the 2023 March Madness tournament has tipped off, it's truly a wonderful time to be a sports bettor. After all, we've already seen some crazy upsets (No. 16 seed Fairleigh Dickinson knocking off Purdue, No. 15 seed Princeton sending No. 2 seed Arizona home). What does the weekend have in store for us?

Well, the best sports betting apps have amazing welcome offers for you to take advantage of today, giving you a headstart on building your bankroll for wagering on all the games.

Best March Madness Betting App Promos 

Sign up today to grab these bonuses before wagering on the day's slate of March Madness action. All these betting offers provide something slightly different, so make sure to read the terms and conditions carefully when you've selected your promo.

Also, please note that not all these offers require you to enter a promo code. Some of them you simply need to follow our 'Bet Now' links to automatically qualify for the selected March Madness promo code.

BetMGM Sportsbook Tourney Betting Promos

Sign up for a new account using the BetMGM bonus code BOOKIESMARCH and get $200 in Bonus Bets Instantly when you make a $10 pre-game moneyline wager on any team. This deal will run throughout the tournament. Here's how it works:

1. Sign up with the BetMGM bonus code BOOKIESMARCH
2. Bet at least $10 on any team in the March bracket
3. Get $200 in Bonus Bets Instantly

BetMGM March Matchups Betting Promo Terms & Conditions

• Bet at least $10 on any pre-game moneyline
• Get 4 $50 bonus bets (credited generally with 24 hours)
• Bonus bets can only be placed as a single bet (straight bet, parlay etc)
• You have 7 days to use the bonus bets
• Bonus bets have no cash value
• Any winning from bonus bets is immediately withdrawable

If you don't want that offer, you can use the BetMGM bonus code BOOKIES and get a first-bet bonus worth up to $1,000 (you can't combine the two promos). This means that players can choose from any set of odds in any sports betting market and place a real-money wager up to $1,000 on its outcome—and then earn either cash profit on a winning bet or receive bonus bets that equal their original wager if it loses. 

For example, bettors who lose a $700 real-money wager will be awarded five $140 bonus bets for a second chance to get their bets correct. Note that losing bettors will receive a single matching bonus bet if their first wager is less than $50, but that’s still a great deal for bettors looking for some insurance on the first bet they make at BetMGM.

Click the BET NOW button below to begin your BetMGM experience and earn your bonus bets.

Up to $1,500 in Bonus Bets if Your First Bet Loses Promo Code: BOOKIES

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Bonus Bets Expire in 7 Days. One New Customer Offer Only. Must be 21+ to participate & present in OH. In partnership with MGM Northfield Park. Gambling problem? Call 1-800-GAMBLER. Visit BetMGM.com for T&Cs. US promotional offers not available in NY, NV, or Puerto Rico.

Caesars Sportsbook March Madness Promo

The Caesars Sportsbook promo code BOOKIESFULL gives new users back up to $1,250 in bonuses on Caesars. Use the promo code BOOKIESFULL when signing up, then deposit at least $20 and then place your first bet. 

If it loses, get back up to $1,250 on Caesars Sportsbook. Plus, you’ll get 1,000 Tier Credits and 1,000 Reward Credits. If you are in Ohio or Massachusetts, use the promo code BOOKIES1BET instead to get back up to $1,500 on your first losing wager. As always, the value of your bet credit matches the value of your losing wager (up to $1,500).

There is also the Long Shot Parlay Bonus. Just opt-in at Caesars today, then bet $25 or more on a +1000 or longer parlay (i.e. +1050, +1500) on March Madness matchups to get a $15 bonus bet to use on March Madness.

Caesars Sportsbook also offers a number of odds boosts for March Madness, which all come with a $100 maximum wager (examples below):

• Kansas & Texas Each Win 2023 Men's NCAA Tournament Region at +2000
• Alabama & Tennessee Each Win 2023 Men's NCAA Tournament Region at +1400

$1,000 First Bet on Caesars Promo Code: BOOKIES1000

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Must be 21+ to participate. T&Cs apply.

DraftKings Sportsbook March Madness Promo

Over at DraftKings Sportsbook, new users just need to make a $5 first bet and get $200 in bonus bets – win or lose. Just register for a new DraftKings Sportsbook account, deposit $5, and then bet $5 on any game. You’ll then get $200 in bonus bets in the form of eight $25 bonus bets.

If you want to bet on March Madness but only want to make a small deposit, then we recommend taking advantage of this great offer from DraftKings Sportsbook today. You'll start with $200 in bonuses for betting.

Bet $5, Get $150 Instantly

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21+ and present in most states. (18+ DC/KY/NH/WY). Void in IA/KS/KY/LA/MD/MI/NJ/NY/TN/VA/VT/ONT. Eligibility restrictions apply. On behalf of Boot Hill Casino & Resort (KS). 1 per new customer. Min. $5 deposit. Min. $5 bet. Max. $150 issued as non-withdrawable Bonus Bets that expire in 7 days (168 hours). Stake removed from payout. Terms: dkng.co/bball. Ends 1/5/25 at 11:59 PM ET. Sponsored by DraftKings. GAMBLING PROBLEM? CALL 1-800-GAMBLER, (800) 327-5050 or visit gamblinghelplinema.org (MA). Call 877-8-HOPENY/text HOPENY (467369) (NY). Please Gamble Responsibly. 888-789-7777/visit ccpg.org (CT), or visit www.mdgamblinghelp.org (MD).

FanDuel Sportsbook March Madness Promo

With the FanDuel Sportsbook promo code, new customers get 10x their first bet up to $200 in the form of bonus bets. Just sign up for a new account, deposit $10 or more, and then place your first bet. 

You’ll get 10x your first bet in the form of bonus bets win or lose, meaning a $20 first bet would get you the maximum $200 in bonus bets.

For all users, you can Bet The Bracket with a No Sweat bet for up to $100. Opt-in and bet on any March Madness team to win, and get back up to $100 in bonus bets if your bet loses. Only one wager per person and the final odds must be -200 or longer (i.e. -150, +100). 

On top of that, get Bracket Parlay Insurance at FanDuel during March Madness. Once per day, you can make any parlay worth between $1 and $25 of at least three legs at +400 or great final odds (i.e. +450, +500). If exactly one leg of your parlay loses, you’ll get back up to $25 in the form of bonus bets.

BetRivers Sportsbook March Madness Promo

The BetRivers Sportsbook promo code BOOKIES gives new customers a second-chance bet for up to $500. 

Use the promo code BOOKIES when signing up, place your first deposit for at least $10, and then make your first bet. If it loses, get back up to $500 in the form of a bonus bet. It’s a great offer that provides a type of first-bet insurance, so take advantage of it ahead of today's March Madness slate.

Betway Sportsbook March Madness Promo

At Betway Sportsbook, new customers can get back up to $250 in bonus bets for their first losing wager. This can be used on March Madness.

Make your first bet for up to $250 on a sports market at -300 or longer odds (i.e. -250, -150) and get back up to $250 in bonus bets if your wager loses. It’s a great offer among these March Madness promo codes, so sign up for Betway Sportsbook and claim this offer today.