Best March Madness Betting Promos & Bonuses 2026

Aside from the Super Bowl, nothing is bigger than March Madness. The NCAA Tournament, like the Super Bowl, will be watched worldwide. If you plan on biting off a piece of the action, this page is your one-stop shop for finding the best March Madness promo codes and bonuses offered by legal sportsbooks in the US.

After finding the best sportsbook bonus, you'll want to check out our March Madness Betting Guide, made by our in-house experts.

Need more March Madness? Then head over to our selection of the Best March Madness Betting Sites, where we share all the best legal sportsbooks bettors can use to place bets this March Madness.

Keep reading below for all the best bonuses and promotions.

Best March Madness Betting Promos and Promo Codes

FanDuel Sportsbook March Madness Promo

FanDuel Welcome Bonus - Get Up to $300 Back in Bonus Bets for 10 Days

It is time for the big dance, and FanDuel is bringing the heat with a massive welcome offer! New users at FanDuel Sportsbook get up to $300 back in bonus bets for 10 days. There is no better way to start the NCAA Tournament.

When you sign up, you will unlock a Bet Reset Token every single day for your first 10 days, each acting as a safety net worth up to $300. Just build any wager, toggle on the token in your bet slip, and lock it in. If your bet doesn't hit, FanDuel will refund your stake (up to the $300 daily maximum) in nonwithdrawable Bonus Bets within 72 hours of settlement. Just make sure to stay on top of the clock - your daily tokens expire 24 hours after they are issued, and any Bonus Bets you receive will expire seven days after they land in your account.

Use our custom link to sign up with FanDuel today to get your welcome bonus.

30% College Basketball Profit Boost

Ready to maximize your payouts on today's college hoops slate? Opt-in to instantly secure a 30% Profit Boost Token for any College Basketball game. Once claimed, simply apply the token in your bet slip to any wager with odds of -200 or longer. Your final payout will include your original stake, giving you a massive bump in value. Just be sure to log in to check your maximum wager limits, and lock in your boosted bet before the token expires.

Visit FanDuel and Claim This Offer

BetMGM Sportsbook March Matchups Bonus Code WSNSPORTS

BetMGM Welcome Promo - Get up to $1,500 Paid Back with Promo Code WSNSPORTS

BetMGM Sportsbook follows the path set by other US giants in the sportsbook industry and comes with its own excellent promo offer for the March Madness tournament - get up to $1,500* paid back in bonus bets if your bet doesn't win.

Your bonus bets will expire after 7 days of receiving them, and you can only claim this offer if you are a new customer at BetMGM.

This incredible deal essentially gives you a no-sweat bet for your first BetMGM Sportsbook bet. Sign up today with promo code to take advantage of this offer before March Madness tips off.

*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. This promotional offer is not available in DC, MS, NY, NV, ON, or PR.

College Basketball Odds Boost Token

March is officially in full swing, bringing the most electric month of the year to the college hoops calendar. As the madness begins, grab a special Odds Boost Token at BetMGM to use on any college basketball bet. Just apply the boost to your bet slip, and if your team pulls through, you will walk away with a significantly larger payout than standard odds would dictate. Simply log in to your account to check the exact terms and secure your token before tip-off.

Claim Your BetMGM Bonus Code

Caesars Sportsbook March Madness Promo

Bet $1 at Caesars and Double Your Winnings with Promo Code WSNDYW

Caesars Sportsbook is making it easy for new users to take bold steps with their first bet, with a set of 10 separate 100% Profit Boost Tokens after signing up with our promo code WSNDYW and betting as little as $1.

That's not all. Regardless of your first bet outcome, all new Caesars users get 1,000 Reward Credits and 1,000 Tier Credits. Caesar's first-class rewards system is one of the best in the country, and its promo offer helps you get a jump start on those rewards. You can use those rewards for free bets, bonuses, and even hotel stays at any Caesars location.

That means you are getting one of the best sportsbook promos in the industry and earning points for rewards you can use. That combination can only be offered by the O.G. of US sportsbooks.

Climb the Leaderboards and Win Bonus Bets

From March 16 through April 6, 2026, you can jump into the Tournament Pick ’Em game for a shot at life-changing bonus funds.

The contest is broken down into 10 selection periods, where you will make 5 picks at a time. If you run the table and nail all 50 picks, you will walk away with an equal share of a jaw-dropping $5,000,000 Bonus Bets jackpot.

Even if an early upset ruins your perfect run, you will still earn milestone rewards - like Profit Boosts and Bonus Bets - based on your total correct picks throughout the promotional period. Milestone prizes are credited within 24 hours, but be sure to use them quickly, as they expire seven days after issuance.

Head to Caesars to Claim Your Bonus

BetRivers Sportsbook March Mania Promo

BetRivers Sportsbook up to $500 in Second Chance Bet

BetRivers Sportsbook, an excellent choice for players in many locations, is known for its clear and impressive mobile app and live betting options. But now, new users who use the WSN exclusive link can get up to $500 in second chance bet if their first bet is a loss.

All you need to do is deposit $10 into the BetRivers account you signed up for using our promo code. Then just place your first bet on the NCAA Tournament, and if your bet loses, you'll receive your initial stakes back as bonus bets, up to a promo amount of $500 (promo amount depends on the state you are in).

If you do receive the bet credits, you can use them to place bets within the first 14 days of receipt. While they can't be withdrawn for cash, you can keep any winnings from bets placed using the credits.

College Basketball Weekly Profit Boosts

BetRivers consistently offers College Basketball Profit Boost throughout the college basketball season, providing a reliable way to increase your potential payouts.

To qualify, log in to your BetRivers account and select the boost from your bet slip before placing a wager on any college basketball market.

Claim Your Bonus Bet on BetRivers

How to Claim Your March Madness Promos & Betting Bonuses

You saw what promos sportsbooks have to offer for the Big Dance, now all you have to do is go and sign up at one, or at all of them if you'd like. Here's how to claim your bonus.

1. Use our safe links to navigate to the sportsbook's sign-up page.

2. Create an account. The sign up process is quite similar no matter which sportsbook you pick. They will ask you to share your personal information so they can confirm you are over 21 and present in a legal sports betting state. This is also the stage when you can use a sportsbook promo code.

3. Opt-in to claim your bonus. This part depends on the sportsbook you choose. But normally you will have to meet some standard play-through requirements in order to qualify. You might have to deposit a small amount $5-$10 and then place a first bet. Follow the instructions provided by the sportsbook carefully to make sure you get your bonus.

4. Make a deposit. Deposit using a payment method that's convenient to you. Sportsbook allow you plenty of choices. Some popular methods available at most sportsbooks are: PayPal, Venmo, ACH Bank Transfer.

5. Place your bet. Browse through the different betting markets available at the sportsbooks and place your first bet.

Types of Bets: March Madness NCAA Tournament Bets

Spread

A spread bet is one of the most used types of bets placed by customers for college basketball. The way it works is that oddsmakers at a sportsbook determine a favorite team in a matchup and predict how much that team should win by. For example, say Michigan State is playing Michigan. The Spartans may be favored by -2.5 points, which means to cover the spread, Michigan State has to win by at least 3 points. 

Moneyline

A moneyline wager is the simplest type of bet a gambler can make. For any customer at an online sportsbook, you would pick which team is going to win. Odds on the game determine how much the wager payout or payouts would be if it hits. The favorite will have lower odds, while the underdog will have higher odds.

Parlays

Parlay bets are some of the very best for bettors trying to make big money with little stake. Whether you live in Massachusetts, Tennessee, or anywhere else that has legal sports betting in the country doesn't matter. Parlays can pay out big. With that said, parlay wagers are some of the most challenging bets to win.

The way a parlay works is to combine multiple bets to increase the odds of your wager. Each part of a parlay is called a leg and is a bet by itself. For a parlay wager to be a winner, each of the legs of the parlay must win. If one leg loses, the entire wager loses. Check out the WSN Parlay Calculator to see how odds increase with each added leg of a parlay.

Futures

Future bets are a wager placed on a specific team or player to win a championship or award. A bettor can say the Kansas Jayhawks will win the National Championship and get various odds for it to happen, just to name one example.

Team Props

Team Props vary by state, so check your state's rules and regulations around prop bets. The way a prop bet works, though, is betting on whether a particular thing will happen in a game. Common team props will also include which team will do something first. For example, a typical team prop bet may be which team scores 10 points first or which has the most three-pointers in a game. 

Player Props

Player Props are similar to team props but are odds for an individual player to have something happen. Standard player props include the number of threes a player makes, and a bettor can bet whether they hit over or under a set number.

Live or In-Game Betting

Bettors can take advantage of live or in-game betting while games are being played. Bettors can place wagers on many typical bets, from moneyline, spread, point totals, and more.

Other Bet Types

Every Sportsbook has its own wagers, which can differ from operator to operator. There are teaser bets, NCAA Tournament Pools, over/under point total bets, and remember various bonus code and sportsbook promotions must be used with certain bet types at times. Each chance bets offered comes with different levels of opportunity, and a lot of them vary in form and with the sporting events they are tied to.

States Where Gamblers Can Bet on NCAA Tournament & March Madness

As the Brackets get released, bettors are thinking of many things, from who the no-brainer CBB teams are in the tournament, which team didn't get a good enough seed, or other teams like Gonzaga got too high of a seed considering the conference the Zags play in. 

An important thing to consider is whether sports betting sites are legal in your state. Sports betting operators in some states are legal only at retail venues like casinos, and in others, states are legal both retail and online. Also, considering being a good sports betting operator often means that the sportsbook operates in multiple states. 

There are also states where betting on college sports is not legal or has limitations, even if betting on pro sports is allowed. See each table below to help you know your options.

States Where Online Betting on March Madness Is Legal

States Where Betting on March Madness is Only Allowed In Person at Retail Venues

• Mississippi: Only at Casinos

• Montana

• New Mexico: Only at tribal Casinos

• North Dakota: Only at tribal Casinos

• Oregon

• Washington State: Only at tribal Casinos and no betting on in-state teams

• Wisconsin: Cannot bet on in-state teams

States Where No Betting on March Madness is Allowed

• Alabama

• Alaska

• California

• Florida

• Georgia

• Hawaii

• Idaho

• Maine

• Minnesota

• Missouri

• Nebraska

• Oklahoma

• South Carolina

• Texas

• Utah

• Vermont

Tips for Choosing The Best Sportsbook Promotion for You

Now that you know some of the best sportsbook promo codes and bonuses for the 2023 March Madness tournament, it's time to pick one to get started. With so many great deals being offered, it can be overwhelming to choose the right one. If you are still trying to decide which to choose, check out our tips to help you get the most value out of every promo and the benefits available to you.

Read the Details of Each Bonus Carefully

l have different terms and conditions that could affect your experience. Check for things like expiration dates, withdrawal rules, and playthrough requirements, and verify its availability in your state. Each promo works differently, so you'll need to be sure you understand things like playthrough requirement, qualifying bet, and time to use a bonus/promo before making a selection.

Set a Budget to Determine How Much You Can Bet

Even though you have yet to choose your sportsbook apps, knowing how much you can afford to deposit can help determine which promo is best for you. While many include offers of a deposit bonus or no-sweat bet up to $1,000, they require an initial deposit of at least that amount. Once you determine a budget, calculate each promo based on what your initial deposit will be.

Check Out Our Sportsbook Reviews

We have researched all of the top online sportsbooks in the industry and have reviews to help you make the most informed decision. There are many reliable and well-established options to choose from, but they all have their differences. Check out our online sportsbooks review page to see our findings and get more insights on some of the biggest pros and cons.

Sportsbook Odds

Sportsbook odds vary from sportsbook to sportsbook and market variety. Gamblers that take their wagers seriously often use more than one provider for their wagering. Bookmakers at an online sportsbook will use their own odds. While most odds are typically close from sportsbook to sportsbook, getting bets that are consistently +5 to +15 better can make a gambler significantly more money over the course of a season. There are also sportsbooks that offer odds boosts at times as ongoing promotions for their customers. So with that said, make sure when placing pregame wagers, whether it is a bet on the spread or the moneyline, to look at the odds and markets available.

Verify Payment Method Deposits & Withdrawals

While the sportsbooks from our list accept many of the same payment methods, be sure to verify your preferred method is available. Most major sportsbooks allow for bank transfers, credit/debit cards, PayPal, and other eWallet services. 

Determine What Sports or Leagues You Want to Bet on

While these promos celebrate March Madness, you should determine what other sports or leagues you like to bet on. The NCAA Tournament is one of the most exciting sports betting events of the year, but it only lasts for a month. You'll be using these promos to build your bankroll, so you'll want to be sure the sportsbook you choose covers other sports and leagues once March Madness ends.