We've made it, March Madness is finally here and the college basketball betting calendar is approaching its dramatic conclusion. There have already been a couple of shocking upsets, with Furman taking down Virginia and Princeton sending Arizona home.

With tons of action over the next week, we've rounded up all the best college basketball betting promos available now and put them right here in a handy guide. Remember, you can grab as many of these CBB betting promo codes as you like.

Best College Basketball Betting Promos Today

There are currently thousands of dollars up for grabs with college basketball betting promos, including deals at FanDuel, DraftKings, BetMGM Sportsbook and other top betting apps. We expect the deals to really heat up between now and the Final Four, so keep this page bookmarked for the latest information.

To qualify for these CBB betting promos, you must be in a state that has legal betting and you must be at least 21 years old. Other terms and conditions apply so make sure to check them carefully when signing up.

BetMGM CBB Betting Promos

It's super simple at BetMGM Sportsbook. Just sign up using the BetMGM promo code BOOKIESMARCH to get $200 in Bonus Bets to use on the tournament. You must place a single $10 wager on a college basketball game to qualify for the $200 in bonus bets.

Or, sign up today using the promo code BOOKIES and you'll get a first-bet offer worth up to $1,000. That basically means if your initial wager loses at BetMGM, you'll get a refund in bet credits (up to a maximum of $1,000).

Caesars Sportsbook College Basketball Betting Promos

Use the Caesars Sportsbook promo code BOOKIESFULL when signing up to access a first-bet offer worth up to $1,250. This is currently the largest CBB betting promo available and Caesars Sportsbook offers a ton of college basketball betting markets.

You'll also get 1,000 Tier Credits and 1,000 Reward Credits when you open and fund your account at Caesars Sportsbook. The minimum deposit here is slightly higher than normal ($20).

FanDuel CBB Betting Promos

FanDuel Sportsbook is America's No. 1 Sportsbook. Right now, you can get a $1,000 No Sweat First Bet to use on the college basketball betting slate. That's pretty good with the college conference tournament schedule on tap this weekend.

It works like this: Sign up at FanDuel, make a deposit and a first wager. If that first wager loses, then you'll get the stake refunded back to you as bonus bets (up to a maximum value of $1,000). The value of your bonus bets will match the value of your losing wager.

DraftKings College Basketball Betting Promos

This is a good one. The DraftKings college basketball betting promo delivers $150 in bet credits if you bet $5 on college basketball and win that bet, including March Madness. You must sign up, deposit, and then place a pregame wager. This must be your first bet after signing up. If your bet wins, you'll get your winnings, plus the $150 in bet credits from DraftKings. If your bet loses, never mind.

WynnBET CBB Betting Promos

Sign up with the WynnBET promo code XBDC and get up to $100 in bonus bets with a $100 wager. You can bet on college basketball to qualify for this deal so if you are planning a bigger bet, WynnBET could be the place to go this week.

How CBB Betting Promos Work

Signing up with a CBB betting promo is easy. Let's use an example from BetMGM Sportsbook. Just sign up for a new BetMGM Sportsbook account using the bonus code BOOKIES, make your first deposit for at least $10, and then place your first wager on any sport, including college basketball. 

If your first wager loses, you will get back up to $1,000 in the form of bonus bets. The bonus bets are divided by five, so if you lost your first bet for $1,000, you’d get five $200 bonus bets. 

If you bet $50 or less, you would get back one single bonus bet for $50. You get seven days to use your bonus bets.

The various college basketball betting promos vary slightly depending on their terms and conditions, so make sure to read the small print once you've chosen your CBB betting promo to use. But basically, many of the promos work in the same way: You sign up, enter a promo code if required, then deposit. That's it! Typically, you'll get access to the bonus right then and there.

There's plenty of college basketball betting action almost every day, especially at this time of year. Check tonight's schedule, then dive in using any of the CBB betting promos above to get started.