Underdog Fantasy Promo Code & Referral Bonus for December 2025
If you’re new to Underdog Fantasy and want to know what all the hype is about, you’re in for a treat. This platform is all about giving bettors a variety of ways to enter DFS contests.
The best news? You won’t need an Underdog Fantasy promo code to claim the sign up offer and boost your initial deposit. When you play just $5, you’ll be awarded with $100 in bonus funds to use across all available DFS contests.
In this guide, we’ve got all the details of how to claim this offer as well as a few top tips on how to use it effectively.
Overview of the Underdog Fantasy welcome offer
Underdog Fantasy is primarily a Daily Fantasy Sports platform which means that you’ll have the opportunity to build teams and enter them into contests. When choosing a new online sportsbook to sign up to, there are, many factors to consider. Let's go through them.
One of these is often the sign-up offers and any ongoing DFS promotions that a site is running. While Underdog Fantasy performs well in many areas, including a variety of betting options and having a fantastic mobile app, the bonus offers available are a bit limited. The main offer available is the sign-up bonus, which you can claim through our links within this guide.
New bettors can grab a $100 boost when you sign up and make your first play of at least $5. What makes this offer even better is the flexibility of being able to bet on a whole range of sports, including most major leagues like NFL, NBA, MLB and so on.
For a full breakdown of everything this platform has to offer, you can read our Underdog Fantasy review. You won’t need an Underdog Fantasy promo code to claim the offer, making it even easier to claim.
When your qualifying play settles, you’ll be awarded the $100 boost in the form of bonus funds. Bonus funds can then be used to build your teams and enter them into new DFS contests.
You won’t be able to withdraw your bonus funds without playing them first, but once you have, you can withdraw any winnings that you receive as you normally would.
Be sure to keep an eye on the expiry dates, as you often have a limited time to both claim the offer and to use the bonus funds once you’ve received them.
Let’s recap the key details:
- Play $5, get $100 in bonus credits
- Receive the bonus funds within 72 hours of your play settling
- Bonus funds must be wagered before they can be withdrawn
Pros and cons: Underdog Fantasy promo code
Pros
- Easy to claim sign up offer
- Play $5, get $100 in bonus funds
- Bonus funds can be used across all major league contests
- Can claim bonus in mobile app
Cons
- Not available in all states
How to sign up and claim the Underdog Fantasy offer
Getting started with Underdog Fantasy is super simple and claiming the sign-up offer can be achieved in just a few clicks.
Whether you’re looking to put together your winning team for a Pick’em contest or dive into the world of Best Ball Fantasy, this platform has something for you. And the best part? You won’t need an Underdog Fantasy promo code to claim either. This makes everything a lot easier.
Claiming the sportsbook bonus
Claiming the sign up offer is a straightforward process with no Underdog Fantasy promo code needed; if you're at least 18 years of age and located in a state where Underdog Fantasy can legally operate to claim any welcome offer, you're onto a winner.
To make it as easy as possible for you, we’ve compiled this handy step-by-step guide below:
- Create your account: Click our page banners to head over to the Underdog Fantasy website, and either continue here or download the mobile app. Click ‘Sign up’ and complete the registration form with your personal info - name, email, address, and the last four digits of your SSN (this is to verify that you’re at least 18 years of age and located in a legal state).
- Make your first deposit: Deposit at least $5 using any of the payment methods available at Underdog Fantasy, including debit/credit cards like Visa or Mastercard, PayPal, or online banking.
- Place your qualifying play: Play $5 on any eligible DFS contest - you’ll find that there’s plenty to choose from.
- Get your bonus funds: Once your qualifying play settles, you will receive $100 in bonus funds. It doesn’t matter whether your play wins or loses; you’ll collect your bonus funds as soon as it settles, regardless of the outcome.
- Use your bonus funds within seven days: You’ve got one week to make the most of your bonus funds, so don’t wait too long.
Top tips for using your Underdog Fantasy sign up offer
Once you’ve followed these steps and claimed your sign up offer, with no Underdog Fantasy promo code needed, you may be wondering how to make the most of it. We thought we’d share a few of our top tips for maximising your $100 bonus funds.
Start making plays with your favorite major leagues
When you sign up to Underdog Fantasy you’ll find that you can build a team and enter contests across the top five major leagues, including NFL, NBA, MLB, PGA and NHL.
It’s a good idea to stick with the league that you know when you first start out, as you build up your confidence with the platform. So, if you’re a huge American Football fan, it’s best to stick with the NFL for your first few plays until you feel ready to branch out.
Use your bonus credits quickly
The Underdog Fantasy bonus betting funds will expire seven days after being awarded to your account. That may sound like plenty of time, but it can sneak up on you if you’re not paying attention. Make sure you plan ahead a bit and you know how you’re going to use them.
Double check the T&Cs before claiming an offer
It’s often tempting to dive straight in, especially when there is so much variety available at Underdog Fantasy. But things like wagering requirements or league restrictions can trip you up if you don’t take the time to read the rules thoroughly. We generally find this platform makes things pretty clear, but it never hurts to double check.
Keep an eye on your account notifications
After you’ve claimed your chosen Underdog Fantasy bonus offer, you may receive notifications about exclusive offers, free-to-play pools and some seasonal promos too. So, it never hurts to check your email or account so that you know when a new offer is available.
Final thoughts on Underdog Fantasy bonus offers
For all the DFS fans out there, Underdog Fantasy has done a solid job of creating an enticing sign up offer to go with the impressive range of major leagues and sports available.
The biggest pro of the sign up offer is that you don’t need an Underdog Fantasy promo code to claim it. The steps are super clear, and the rewards are broken down which gives you more control.
Admittedly, it would be good if there were a couple more offers or perhaps an ongoing promotion, but they may add a few more soon so keep an eye out for that. And when their opening offer is this strong, you can let them off.
If you’re new to Underdog Fantasy, this sign up bonus is a great way to explore everything that this platform has to offer. Ready to claim yours? Tap the Underdog Fantasy banners displayed around this page!
Play $5 Get $100 in Bonus Entries