March Madness arrived with a bang on Thursday, with a couple of upsets including No. 15 seed Princeton's takedown of No. 2 seed Arizona. Things stepped up a notch on Friday. For just the second time ever, a No. 16 seed beat a No. 1 seed, as Fairleigh Dickinson sent Purdue home. It was wild. What does the Sweet 16 have in store for us on Thursday?

Online betting apps and sportsbooks across the country are handing out their top March Madness betting promos to entice players to register for new accounts right now. We have them all right here. But hurry, not all of them will last much longer. Plus, you'll wanna get in on the action for the later rounds as the tension mounts.

Those March Madness sportsbook promo codes will unlock welcome bonuses that include bonus bets, first-bet insurance, deposit bonuses, or some combination of the three. What does this mean? It means you will be able to take advantage of free bonus money and enjoy everything these great sports betting sites have to offer.

We’ll go over what these offers mean, what to expect from each of the major operators in the country, and how you can take advantage of these sportsbook promo codes just in time for the early rounds of the 2023 NCAA Tournament.

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

Tap for Promo Activated! Visit site

Used 31 Times Today

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.

$1,000 First Bet on Caesars

Tap for Promo Activated! Visit site

Used 71 Times Today

OH only. 21+. New users and first wager only. Must register with eligible promo code. Bet amount of qualifying wager returned only if wager is settled as a loss. Maximum bet credit $1,000; must be used within 14 days of receipt. See Caesars.com/promos for full terms. Void where prohibited. Know When To Stop Before You Start.® Gambling problem? Call 1-800-GAMBLER

Bet $5, Get $200 in Bonus Bets + No Sweat NBA SGP Every Day Of The Playoffs

Tap for Promo Activated! Visit site

Used 24 Times Today

Must be 21+ and present in OH. Gambling Problem? Call 1-800-GAMBLER.

Bet $5, Get $150 in Bonus Bets

Tap for Promo Activated! Visit site

Used 23 Times Today

Must be 21+ and present in OH. Gambling Problem? Call 1-800-GAMBLER.

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

Tap for Promo Activated! Visit site

Used 69 Times Today

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.

2nd Chance Bet Up To $100

Tap for Promo Activated! Visit site

Used 24 Times Today

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

Check Out Betway Here

Tap for Promo Activated! Visit site

Used 26 Times Today

Must be 21+ and present in OH. Gambling Problem? Call 1-800-GAMBLER.

March Madness Betting Promos: How They Work

It’s important that new bettors always read the terms and conditions of any online sportsbook they’re considering signing up for. Read our reviews of each of the operators so you fully understand what you’re getting into when you use these March Madness betting offers. Here’s a quick look at what these welcome bonuses might entail:

A deposit match bonus doubles your dough before you ever place a bet. For example, if bettors deposit $200 in cash, they’ll receive $200 in site credit. 

A first-bet offer means bettors who lose their first wager will receive site credit equal to that amount, giving them a second chance to get their bets correct. Lastly, some sportsbooks will hand out bonus bets once players place a real-money wager—and bettors receive the bonus bets regardless of the original wager’s outcome.

Almost always, any bonus bets that come out of these welcome bonuses will have a one-time playthrough requirement, so any winnings you earn off these bets can be redeemed as cash profit.

BetMGM March Matchups Betting Promo For Sweet 16

Bettors who register with the BetMGM bonus code BOOKIESMARCH can get $200 in bonus bets with a simple $10 wager on the tournament. It’s one of the most popular offers in the industry during the Men's National Championship tournament, with bettors receiving bonus bets regardless of whether their initial wager hits.

It’s a win-win for all new players, who will also be able to take advantage of great One Game Parlays during March that increase potential payouts throughout the tournament.

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

Tap for Promo Activated! Visit site

Used 53 Times Today

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 Betting Promo

The largest potential March Madness offer on this board is the Caesars Sportsbook promo code BOOKIESFULL. New players will earn first-bet insurance up to $1,250 simply for signing up. 

Place a first real-money wager on any set of odds during March Madness and earn cash profit with a victory or a matching bonus bet if that first wager loses. Either you’ve got cash in your pocket of you have a second chance to get your bets correct. 

Caesars Sportsbook always has elite boosted odds on player and team props around March Madness, so check the “Boosts” section of the app and website to see what’s available to you once the games begin.

$1,000 First Bet on Caesars

Tap for Promo Activated! Visit site

Used 38 Times Today

OH only. 21+. New users and first wager only. Must register with eligible promo code. Bet amount of qualifying wager returned only if wager is settled as a loss. Maximum bet credit $1,000; must be used within 14 days of receipt. See Caesars.com/promos for full terms. Void where prohibited. Know When To Stop Before You Start.® Gambling problem? Call 1-800-GAMBLER

DraftKings March Madness Betting Promos

The easiest $150 in free bets you’ll ever earn starts with the DraftKings promo code offer. All bettors need to do is place a real-money wager of $5 or more and they’ll receive $150 in bonus bets—if their $5 bet wins. 

They can also double-dip on their original bet in addition to the six $25 bonus bets they receive. 
DraftKings is also known for having elite odds boosts on the biggest markets of the sports night, so bettors can expect to see some great boosts during March Madness.

DraftKings always has great March Madness betting promos.

Bet $5, Get $200 in Bonus Bets + No Sweat NBA SGP Every Day Of The Playoffs

Tap for Promo Activated! Visit site

Used 5 Times Today

Must be 21+ and present in OH. Gambling Problem? Call 1-800-GAMBLER.

FanDuel March Madness Betting Promos

We all know there’s nothing more stressful than March Madness. Upsets are everywhere and wins can turn into losses in a heartbeat. But with the FanDuel promo code offer, bettors won’t need to worry about their first wager. 

That’s because new players get a $1,000 No Sweat First Bet at FanDuel Sportsbook. Sign up, deposit and make a first wager. If your first wager loses, you'll get a matching bet credit back as a do-over. FanDuel is also known for having some of the best boosted odds in the industry, so you’ll want to see what’s available to you throughout March Madness.

Bet $5, Get $150 in Bonus Bets

Tap for Promo Activated! Visit site

Used 71 Times Today

Must be 21+ and present in OH. Gambling Problem? Call 1-800-GAMBLER.

BetRivers March Madness Betting Promo

Have you ever had your bracket busted by a certain team losing? That won’t happen with the BetRivers promo code offer. 

When you register here, new bettors receive a second-chance bet up to $500. While that’s smaller than some of the other offers on the table, $500 should be enough to take care of most bettors’ needs. BetRivers is also known for having some of the best local odds in the entire industry, so see what’s available for the local teams in your state.

2nd Chance Bet Up To $100

Tap for Promo Activated! Visit site

Used 27 Times Today

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

WynnBET March Madness Betting Promo

There’s a little bit more required to earn the WynnBET promo code offer XBDC, but it’s still a great deal. Bettors who place a $100 real-money wager will receive a $100 bets bonus—no matter what happens with their original wager. 

It’s a great offer that also allows for players to potentially double dip on their original wager. At the very least, you’ve got $100 of bonus wagers back in your pocket to bet again.

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

Tap for Promo Activated! Visit site

Used 44 Times Today

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.

Betway March Madness Betting Promos

New bettors at Betway can get up to $250 in bonus bets when they sign up during March Madness. Just hit the 'Bet Now' link below and complete registration today, then place a wager (max bet: $250) on a market with odds of at least -300. You'll receive up to $250 in bonus bets back from Betway if that initial wager loses. The value of your bonus bets will match the value of your losing stake.

This March Madness betting offer is valid from March 14 through April 3. It's not one of the biggest March Madness promos, but if Betway is available in your state then it's worth grabbing the Second Chance opportunity if that first wager loses.

Check Out Betway Here

Tap for Promo Activated! Visit site

Used 69 Times Today

Must be 21+ and present in OH. Gambling Problem? Call 1-800-GAMBLER.

How to Claim March Madness Betting Promos

No matter which operator you wind up going with (there’s no max), bettors will need to register for a new account before they start taking advantage of any of these offers. Luckily, it’s typically a simple process across the board. Follow these short steps and you’ll be betting in no time:

1. Click the links on any of the online sportsbooks you’re considering using to begin your registration; if applicable, type in the promo code associated with the operator you’re using to unlock your welcome bonus
2. Create your new account by providing the operator with your personal information to verify your identity; you’ll need to prove you are 21+ years old and located in a state where your sportsbook is legally operating in order to use these offers
3. Place a qualifying deposit to fund your brand-new account and start placing your bets

Where is March Madness Betting Legal?

Not all states allow for collegiate sports betting. There are some stipulations, with certain states prohibiting wagers on in-state colleges and games played in that specific state. Here’s a list of states where online sports betting is legal:

• Arizona
• Colorado
• Connecticut
• Illinois
• Indiana
• Iowa
• Kansas
• Louisiana
• Massachusetts (college wagering on March Madness is legal)
• Michigan
• New Hampshire
• New Jersey
• New York
• Pennsylvania
• Tennessee
• Virginia
• West Virginia
• Ohio

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

Tap for Promo Activated! Visit site

Used 70 Times Today

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.