This weekend alone features premier sporting events like UFC 323, college football conference championships, the final slate before the NBA Cup knockout rounds and of course, the NFL never disappoints. Those and many more make this month so epic, which is why having the best December 2025 promotions is a must. Therefore, we’re here to help you claim them!

Sit back and relax as we take you through how the best December 2025 promotions provide you with several guaranteed bonuses!

The Best December 2025 Promotions To Claim Today

The promos that we’re going to take you through truly are the best. Therefore, if you just want to get started with the best December 2025 promotions immediately rather than uncovering the details first, use the links in the outline below that also summarizes each offer: 

Best December 2025 Promotions: Onyx Odds

Kicking off our collection is a social sportsbook, which means massive availability. Onyx Odds is legal in over 40 states, and which one of the best December 2025 promotions, it’s a no-brainer to get started:

  1. Click here to become a new Onyx Odds member
  2. Enter our Onyx Odds December promo code ALARM
  3. Complete your first purchase for up to $100
  4. Receive 100% of the value in Onyx Cash bonus picks!

This 100% purchase match DOUBLES your account balance instantly! Start making picks on anything with twice the amount by becoming a new member with our exclusive Onyx Odds December promo code ALARM for the first of the best December 2025 promotions.

 

 

 

Best December 2025 Promotions: Kalshi

Next up is a prediction market - Kalshi - and that means even more availability! Kalshi is legal in ALL 50 states, and their brand new welcome bonus is among the best December 2025 promotions:

  1. Click here for a new Kalshi account
  2. Enter our Kalshi December promo code ALARM
  3. Receive a FREE $20 bonus just for signing up!

A FREE reward means that you’ll get it before even making a first-time deposit, and you’ll also find that you can make picks on anything, not just sports! Even if you don’t branch out, secure one of the best December 2025 promotions by signing up here with our exclusive Kalshi December promo code ALARM.
 

 

 

Best December 2025 Promotions: Novig Sportsbook

For the third straight different platform type to kick things off, we have the peer-to-peer sportsbook of Novig. This means commission-free lines, and of course, one of the best December 2025 promotions:

  1. Click here for a new Novig account
  2. Enter our Novig December promo code ALARM
  3. Spend at least $5 on Novig Coins/Cash
  4. Receive a $50 bonus INSTANTLY!

Commission-free lines means that you’re already getting better odds for picks, so a guaranteed 10x bonus is just icing on the cake. Take advantage of it all by creating a new account with our exclusive Novig December promo code ALARM for another one of the best December 2025 promotions.
 

 

 

Best December 2025 Promotions: Rebet Social Sportsbook

Like Onyx Odds, Rebet is another social sportsbook, which means that you’ll again need their platform-specific funds. We point that out to properly share one of the best December 2025 promotions:

  1. Click here for a new Rebet account
  2. Enter our Rebet December promo code ALARM
  3. Spend $10+ and up to $100 on Rebet Coins/Cash
  4. Receive 100% of the value in more Rebet funds!

As you can see, they’re even more like Onyx Odds, as they too are providing all new users with a 100% purchase match! Snag another one of the best December 2025 promotions by activating our exclusive Rebet December promo code ALARM through this link.
 

 

 

Best December 2025 Promotions: Chalkboard Fantasy

Last but far from least is the one and only fantasy platform. Chalkboard has a two-part welcome bonus with both rewards being guaranteed, so it’s undoubtedly one of the best December 2025 promotions:

  1. Click here to create a new Chalkboard account
  2. Enter our Chalkboard December promo code ALARM
  3. Make a first-time deposit of $10+ and up to $100
  4. Receive 100% of the value in bonus funds AND a free player pick for your first lineup!

As if all of that wasn’t enough, Chalkboard also provides DAILY free picks (Shai Gilgeous-Alexander at 0.5 PAR today)! There is a ton of value to be had even beyond one of the best December 2025 promotions when you register today using our exclusive Chalkboard December promo code ALARM
 

 

 

Target Any Sport After Claiming The Best December 2025 Promotions Today

Now that you’re going to be locked in loaded with all types of guaranteed bonuses from all types of platforms, where should you get started? Since you can target anything with the best December 2025 promotions, here are the most popular sporting events this weekend:

 

 
 
 
 
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