Best March Madness betting promos: Claim nearly $4,000 in bonuses from Caesars, FanDuel, Bet365 and DraftKings

We've got them all teed up for new users right here on Selection Sunday:  

Caesars, FanDuel, BetMGM, Bet365 and DraftKings, which rank as our top sports betting sites, are all offering tremendous offers for college basketball fans.  

If you are in a state that has not yet legalized sports betting, try Underdog promo code BETFB for a 50% deposit match for up to $1,000 ahead of March Madness.

Caesars Sportsbook, FanDuel, Bet365 and DraftKings offer best March Madness betting promos

New customers unlock the best March Madness betting promos by registering at any of the sportsbooks listed on this page.

1. Caesars Sportsbook: Bet $1 on NCAA Tournament, Double Your Winnings on Next 10 Wagers

With Caesars Sportsbook promo code PLAYSDYW, the sportsbook will double the payout of the 10 bets you make after your first wager of $1 or more on March Madness.

To register:

• Click here to visit Caesars Sportsbook
• Select the state you're in
• Provide your email and the information requested
• Deposit $10 or more

You're all set to place a bet, and any winnings on your next 10 wagers are doubled.

2. FanDuel promo offers chance to score $200 on winning $5 March Madness bet

The FanDuel promo offers up to $200 in bonus bets just for winning your first wager of $5 or more on the NCAA Tournament.  

New FanDuel users must register and make a deposit. Then, they can place the bet of their choice ($5 min.). If the bet wins, $200 in bonus bets will be placed in your account once the bet settles. That’s +4000 odds (40-to-1) on a $5 bet. Any winnings will be paid out as well. 

Follow these simple steps to get started: 

• Click our FanDuel promo link
• Submit the required information and proof-of-ID documents. No actual promo code is needed for registration
• Deposit at least $5 via your preferred payment method
• Place your first bet ($5 min.) on a game of your choice

If your wager wins, your winnings plus an additional $200 in bonus bets will be headed your way. FanDuel welcome bonus bets show up in your account within 72 hours of your qualifying bet. They must be used within 14 days of issuance and can be broken up into multiple wagers.

3. BetMGM bonus code PLAYSPORT: $1,500 first-bet promo for college basketball

BetMGM bonus code PLAYSPORT offers this deal for college basketball bettors.

• Up to $1,500 in bonus bets back if your first wager loses

Simply register, make a deposit and place your initial wager. If it falls short in the first group of states, BetMGM will match those losses in bonus bets so you can take another crack at profits without risking any extra funds. 

To qualify for the BetMGM bonus, simply click one of our links and follow these steps:  

• Sign up for BetMGM, then make your first deposit of $10 or more.
• Place an opening wager at BetMGM.
• If your first bet does not win, bonus bets matching your losses (up to $1,500) will be delivered to your account within 24 hours.

If you do not use one of our links to reach BetMGM, type PLAYSPORT into the proper section when claiming your bonus. 

Bonus bets cannot be withdrawn and must be used within seven days. Click our BetMGM bonus code links to get started. 

4. Bet365 bonus code BETPLAY: Claim your choice of March Madness promo today

With Bet365 bonus code BETPLAY, you are given a choice of one of these promos:

• First Bet Safety Net up to $1,000 (get stake back on your first bet if it doesn't win)
• Bet $5 Get $150 in Bonus Bets Win or Lose (collect $100 bonus just by placing a $5 bet, win or lose)

This offer is good in these states: AZ, CO, IN, IA, KY, LA, NJ, NC, OH, PA, VA

5. DraftKings promo for March Madness: Bet $5, get $150 instantly & more

DraftKings has a generous multi-part welcome offer this week worth up to $1,200 and one of the deepest betting menus around for March Madness.

Simply register, make a deposit and place your first wager to claim each part of the DraftKings bonus. Here's the entire multi-part bonus offer:

• $50 bonus bet following deposit
• 20% match on that deposit up to $1,000
• Bet $5, instantly get $150 in bonus bets on first wager

Initial registration and deposit will qualify you for the $50 bonus bet (to be paid instantly) and the 20% deposit match. Then, place a bet of $5 or more on odds of your choice. DraftKings will instantly award you $150 in bonus bets, win or lose. 

Any bonus bets will be paid out in six installments of $25 and will remain eligible for one week. 

Bet $5, get $150 guaranteed at DraftKings Sportsbook

March Madness futures odds at top CBB betting sites

Who will cut down the nets as national champion next month in San Antonio? Take a look at March Madness futures to find your favorite team's odds and implied chances of winning it all at top CBB betting sites:

Underdog Fantasy promo code BETFPB: $1,000 bonus for March Madness player props

The Underdog Fantasy promo code BETFPB guarantees a $1,000 deposit bonus for wagering on March Madness. Underdog is a great option for fans in states that have not yet legalized sports betting. 

Note: This Underdog Fantasy bonus is available in AL, AK, AZ, AR, CA, CO, DC, FL, GA, IL, IN, KS, KY, MA, MN, MS, NE, NM, NY, NC, ND, OK, OR, RI, SC, SD, TX, UT, VT, VA, WI, WY & All Canadian Provinces except ON.

You must be over 21 to play. Gambling Problem? Call 1-800-522-4700. 1-800 GAMBLER.

Online sports betting is available in Arizona, Arkansas, Colorado, Connecticut, Delaware, Florida, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Nevada, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, Rhode Island, Tennessee, Vermont, Virginia, Washington, D.C., West Virginia, Wyoming