Sign up for a new DFS account now with the Underdog promo code TOPACTION to claim one of the best welcome offers on the market. Simply play $5+ at Underdog and get $100 in bonus funds or $100 in entries. This sign-up bonus is unique, as it essentially provides you with a 50-50 chance at either bonus format. We explain how the Underdog promo code TOPACTION works in future sections to give you a better idea of how to approach it.
Use the Underdog promo to create entries containing picks from across sports, including those on players on the Week 6 NFL slate. Get started with the Underdog Fantasy promo code TOPACTION now by clicking on the sign-up module below.
Add Action Network as a Preferred Source & Get the Latest DFS Updates
| Underdog Promo Offer | DFS States Available | Underdog Promo Code Sign-Up Link |
|---|---|---|
| Play $5, Get $100 in Bonus Funds or Entries | AL, AK, AR, DC, FL, GA, IL, IN, KS, ME, MS, MN, NE, NM, NC, ND, OK, OR, RI, SC, SD, TX, VT, VA, UT, WI, WY | TOPACTION |
Underdog Promo Code TOPACTION: Get $100 Bonus for Week 6 NFL
The Underdog promo code TOPACTION delivers a unique welcome offer to new users today that represents one of the best alternatives to the top NFL betting promos. Play $5+ at Underdog and get $100 in bonus funds or $100 in entries. You have a 50% shot at getting either format of the bonus. The bonus funds can be utilized to play entries or draft contests, while the $100 in entries can only be used for entries. They are distributed in 10 $10 increments.
Let's take a look at how you can utilize the $100 bonus to play entries at Underdog. There are two different entry types available to choose from: Standard and Flex. A Standard entry provides the largest payout and requires all of your picks to win to receive it. Alternatively, a Flex entry yields a smaller payout for going perfect and roughly the amount of your entry back if you lose just one pick.
Here is an example of a Standard entry that I created for Week 6 NFL, which has a 10.5x payout multiplier:
- Tetairoa McMillan Higher Than 72.5 Receiving Yards
- DK Metcalf Higher Than 58.5 Receiving Yards
- AJ Barner Higher Than 0.5 Rush + Rec TDs
Here is what I receive with welcome offer, depending on the outcome of the entry if I place it for $5:
- If all of my picks win, I receive a $52.50 total payout ($47.50 profit + $5 entry back) and $100 in bonus funds or entries.
- If one or more of my picks lose, I receive $100 in bonus funds or entries.
Underdog Promo Sign-Up Steps: Sunday, October 12, 2025
Use the steps outlined below to claim your $100 bonus with the Underdog Fantasy promo code TOPACTION today:
- Step 1: Click this link or any sign-up module on this page to download the Underdog app.
- Step 2: Create a username and password.
- Step 3: Fill in your email, date of birth, and all other required personal information to create a new Underdog account.
- Step 4: Enter the Underdog promo code TOPACTION and play a $5+ entry to get $100 in bonus cash.
- Step 5: Agree to the Underdog Terms of Use and Privacy Policy.
- Step 6: Click "Sign Up."
- Step 7: Make your first deposit of $10+.
- Step 8: Create your first entry at Underdog with picks from Week 6 NFL games.
Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog operates. Terms apply. Offer not valid in MD, MI, NY, OH, and PA. Concerned with your play? Call 1-800-GAMBLER or visit www.ncpgambling.org; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369)" with "Must be 18+ (21+ MA & AZ, 19+ AL, NE) and present in a state where Underdog operates. subject to change. Terms apply."
