March Madness is finally here, and that’s great news for all sports fans heading into an action-packed weekend of college hoops. It’s also great news for fans that have been waiting to get in on all the online sports betting action currently live and legal across the country. 

Just as there are big wins to be had at the Big Dance, there are big wins to be had at various online sportsbooks. Some of the biggest wins that bettors can rack up are the welcome bonuses that stem from the sportsbook promo codes being offered right now. 

There are a bunch to choose from, so we’ve listed the top March Madness promo codes below and explained what comes with each so you can more easily decide which ones you want to play with. Here’s what you need to know before you start placing your bets:

Best March Madness Promo Codes For Friday

After the fun of upsets from Furman and Princeton on Thursday, now Friday brings another loaded slate of all-day college hoops action. Before you put your bets down, check out these March Madness promo codes from the top betting operators. 

You can grab as many as you like to help build your bankroll before placing your wagers on the day's schedule.

BetMGM Bonus Code Offers

The BetMGM Sportsbook bonus code BOOKIESMARCH entitles new customers to $200 in bonus bets just for making a $10 bet on any March Matchups game. 

Just sign up for a new account, deposit $10, and then place a qualifying wager on any March Matchups game. Win or lose, you’ll unlock $200 in bonus bets in the form of four $50 bonus bets.

BetMGM Betting Promo Terms & Conditions

1. Sign up for a new BetMGM Sportsbook account and the bonus code BOOKIESMARCH
2. Deposit $10 or more
3. Place your first wager on any March Matchups game via a pre-game moneyline for just $10 or more and get $200 in bonus bets win or lose
4. Your bonus bets come in the form of four $50 bonus bets
5. You then get seven days to use your bonus bets at BetMGM Sportsbook
6. Your bonus bets come with a 1x rollover

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

Tap for Promo Activated! Visit site

Used 38 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.

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

Tap for Promo Activated! Visit site

Used 62 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.

March Madness Promo Codes From Caesars

The largest potential dollar amount on the board is the Caesars Sportsbook promo code BOOKIESFULL, which hands out massive first-bet insurance up to $1,250 to all new players. 

Here’s how it works: Place a real-money wager up to $1,250 with your first action at Caesars Sportsbook. If the bet wins, you’ll receive standard cash profit and be on your way. If the bet loses, Caesars Sportsbook will refund you with a single matching free bet equal to what you wagered. It’s a do-over of sorts at one of the most popular operators in the industry.

All new bettors also get 1,000 Tier Credits and 1,000 Rewards Credits—no matter what happens with their first bet. These credits can be accumulated when you place real-money bets and eventually redeemed for additional perks and offers from Caesars Sportsbook.

Hit BET NOW on the link below to qualify for both of these March Madness promo codes with Caesars Sportsbook.

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

Tap for Promo Activated! Visit site

Used 59 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.

DraftKings March Madness Promo Codes

Planning to make a single bet on your bracket during March Madness? It’ll earn you a huge payday if you do it as a new player at DraftKings. That’s because the DraftKings promo code offer delivers $200 in bonus bets to new players who register and place a $5 moneyline wager on any NCAA Tournament game. It's as simple as that. If you don't have a DraftKings account, use our March Madness promo code today to get your bonuses.

Start your DraftKings betting by clicking on the BET NOW button to earn your bonus bets (there is no actual DraftKings promo code to enter, just complete the registration process).

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

Tap for Promo Activated! Visit site

Used 11 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.

FanDuel March Madness Promo Codes

The FanDuel Sportsbook promo code is a No Sweat First Bet for up to $1,000. Create a new account, deposit $10 or more, and then place your first bet. If it loses, get back up to $1,000 in the form of bonus bets to use on any sport you would like.

All customers at FanDuel Sportsbook can also take advantage of the Bracket Parlay Insurance offer from FanDuel Sportsbook, and you can do this once per day. Make a parlay featuring 3+ legs at +400 or greater final odds (i.e. +450, +550), and if one leg loses, you will get back up to $25 in bonus bets each day.

FanDuel March Madness Promo Terms & Conditions

1. Sign up for a new FanDuel Sportsbook account
2. Make your first deposit of $10 or more
3. Place your first bet on any sport and get back up to $1,000 in bonus bets if it loses
4. You get up to 14 days in order to use your bonus bets at FanDuel Sportsbook
5. The bonus bets come with a 1x rollover

Bet $5, Get $150 in Bonus Bets

Tap for Promo Activated! Visit site

Used 56 Times Today

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

WynnBET March Madness Promos

Sign up ahead of the tournament today at WynnBET, place a qualifying $100 wager on the slate, and earn a $100 bonus (regardless of whether your initial bet hits). If it hits, you'll get that profit, plus the $100 bonus.

Click the BET NOW button to begin your WynnBET sports betting experience.

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

Tap for Promo Activated! Visit site

Used 47 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.

BetRivers Promo Codes For March Madness

There's a solid deal up for grabs today at BetRivers: Earn A Second Chance Bet Worth Up To $500. Just sign up at BetRivers, complete the registration (no promo code necessary) and then place a bet up to $500 on March Madness.

If that bet loses, you'll get your stake back from BetRivers up to a maximum of $500 in site credits. It's not the largest bonus available among these March Madness promo codes, but it's certainly a good one for those thinking of signing up at BetRivers this week. If your bet wins, then great. If it loses, you'll get a Second Chance.

2nd Chance Bet Up To $100

Tap for Promo Activated! Visit site

Used 7 Times Today

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