Underdog Sports Promo Code 2026 | US Welcome Bonus

In this section, we’re going to walk you through the necessary steps you need to take to unlock this Underdog bonus code. Don’t worry, there aren’t many steps you need to follow, and you’re not going to need a degree in rocket science or something else complicated to take advantage of this bonus!

In fact, you can do it in just four steps!

Step 1. Sign Up with Underdog

The first thing you’re going to have to do is actually register an account with Underdog. You can do this in one of two ways. You can either head on over to the website or download the app. Once you’ve made your choice, all you have to do is fill in a couple of personal details and create a username and a password.

Step 2. Input the bonus code

Before completing the sign-up process, you’ll need to include the bonus code. You will be given the opportunity to enter a bonus code when you’re making your account with Underdog. The Underdog bonus code for this particular sign up offer is GAMEDAY. If you don’t use the Underdog bonus code, you won’t be able to make use of the bonus! Simple as that!

Step 3. Make your first deposit

Now it’s time to make your first deposit! You can make a deposit to the Underdog website via one of two payment method options, which you can learn more about in our Underdog review here. The minimum deposit is $10.

Step 4. Make use of your Underdog Sign Up Offers!

Once you’ve made your first $5 entry with Underdog, you should receive your $75 bonus in your account straight away. Entry requirements must be met; however, it isn’t going to be much.

In this segment of this article, we’re going to be providing you with 5 expert tips on how to best take advantage of the Underdog sign up offers that we’re focussing on in this review.

Here are our 5 expert tips on how best to take advantage of the Underdog bonus code!

You probably still have a few questions about the Underdog sign-up offers, and that’s natural. In this section, we’re going to be trying to provide you with answers to some of them. Hopefully, by the end of this section, you’ll have all the answers you need regarding the Underdog bonus code!

Q1. Do I actually need a bonus code to unlock this bonus?

Short answer - yes, you do. If you don’t use the bonus code - GAMEDAY, by the way - then you won’t be able to make use of the bonus. It’s really as simple as that. Don’t worry, Underdog hasn't made finding somewhere to input the bonus code difficult. When you’re first making an account with the operator, you will be prompted to input the bonus code. If you fail to do it there, then there won’t be another opportunity afterwards.

Q2. Can I claim any other bonuses at the same time as I claim this bonus?

Some operators can be awkward in the fact that they will only let you claim one bonus at a time. This can be restrictive, but understandable, as having more than one bonus on the go can make things a little confusing. The other bonus you can claim in conjunction with this bonus is the ‘Refer a Friend’ bonus, which will see you receive $10 just for bringing a friend along with you to Underdog. It’s not much, but it’s a nice little bonus all the same.

Q3. When can I withdraw my bonus as part of my winnings?

We’ve already answered this question further back in this article, but we’ll go through it again for you now! The only way you’re going to be able to withdraw your fantasy bonus entries as part of your winnings is by meeting the entry requirements set out by Underdog. Fortunately, the wagering requirements aren’t much at all! All you have to do is enter your deposit and bonus amount once over to unlock your bonus as part of your winnings.

Q4. Are there any restrictions on what I can use the bonus on?

Short answer - no, there isn’t. From our extensive research of the Underdog sign-up offers, we couldn’t find any restrictions in place preventing you from using the bonus on any of the sports, fantasy, or contests that you fancy. There are plenty of contests to choose from, so you’re in for a treat when using this bonus!

Q5. What payment methods can I use to make the deposit?

There are only two payment methods that are accepted by Underdog, so you won’t have much to choose from. However, thankfully, the accepted payment methods are reputable ones that most people will have access to. They are debit/credit cards and PayPal. Whilst it may be a little restrictive, on the bright side, at least you won’t make your first deposit with a payment method that has been excluded.

Unfortunately, there isn’t a VIP or reward program available at Underdog. However, that doesn’t mean that there aren’t any other bonuses. In fact, one of them we briefly mentioned earlier - the Refer a Friend bonus.

This sweet little promo will see you receive $10 for just bringing a friend over to the Underdog website! How awesome is that?

There are also boosters that you can take advantage of when playing with Underdog, which will enhance your gaming experience and give you an opportunity to win even more money.