Register for a new daily fantasy sports account on Thursday, March 19, 2026 with the Underdog promo code TOPACTION to claim $50 in bonus entries. Simply play $5+ to get your $50 bonus now, and create an account with March Madness picks. Underdog is one of the top DFS apps on the market and is available in a majority of U.S. states.
Claim the best March Madness DFS promo with the Underdog promo code TOPACTION by clicking on the module below.
Underdog represents an excellent opportunity as an alternative to online sports betting. The platform operates as a daily fantasy sports app, but with a twist. You create entries comprised of picks on player projections, with each additional pick you add boosting your payout multiplier.
Check out the chart below for more information about where you can get started today with the Underdog promo code TOPACTION.
| Underdog Promo Offer | DFS States Available | Underdog Promo Code Sign-Up Link |
|---|---|---|
| Play $5, Get $50 in Bonus Entries | AL, AK, AR, CA, 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 ACTION Yields $50 Bonus with Best March Madness DFS Promo
When you register with the Underdog promo code TOPACTION, play $5+ and get $50 in bonus entries to utilize for any college basketball game during the NCAA Tournament. This welcome bonus stands out as the best March Madness DFS promo to take advantage of today. Let's break down how entries work at Underdog.
There are two different entry formats to choose from: Standard and Flex. A Standard entry requires all of your picks to win to receive a payout, while a Flex entry requires you to win all picks or lose just one. The key difference is that a Flex entry provides a much smaller payout when you win all of your picks, while a Standard entry rewards you much more for the risk you take.
Suppose I make a Standard three-pick entry that has a 6x payout multiplier. Here is what I receive based on the outcome of the entry:
- If all of my picks win, I receive a $30 total payout ($25 profit + $5 entry back) and $50 in bonus entries.
- If one or more of my picks lose, I receive $50 in bonus entries.
Remember, the Underdog promo code TOPACTION is available to new users in AL, AK, AR, CA, DC, FL, GA, IL, IN, KS, ME, MS, MN, NE, NM, NC, ND, OK, OR, RI, SC, SD, TX, VT, VA, UT, WI, and WY.
Underdog Sign-Up Steps: Thursday, March 19, 2026
Follow the steps outlined below to claim your $50 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 $50 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 March Madness today.
Underdog Terms & Conditions
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 Fantasy operates. Terms apply. Offer not valid in MD, MI, NJ, NY, OH, and PA. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit www.ncpgambling.org; AZ: 1-800-NEXT-STEP (1-800-639-8783) or text NEXT-STEP to 53342; NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369).
