Underdog Bonus Code BDCSocial: Score a Free Keep Your Million Entry for NFL Week 1

Q: What is a fantasy entry in Underdog?

A fantasy entry is simply the lineup or pick you submit inside an Underdog contest, and the format can vary quite a bit. It might be a pick'em slip, a best ball draft entry or a single round of Keep Your Million, with your result depending entirely on how your selections actually perform.

Q: Is Keep Your Million really free to play?

Keep Your Million really is free to play at Underdog. Eligible customers get a virtual $1,000,000 pot with no entry fee and no deposit required at any point. That pot is made up of virtual funds used purely within the game itself, rather than real cash sitting in your account balance.

Q: What happens if I lose all my money in Keep Your Million?

If your pot reaches zero at any point, that particular run comes to an end straight away. Any bonus funds you've already banked from earlier rounds in that same run stay yours to keep, but the current pot itself doesn't carry over or reset into a fresh attempt at Keep Your Million.

Q: Can existing Underdog users play Keep Your Million too?

Most existing Underdog users can take part in Keep Your Million right alongside brand-new customers, since it's designed to be open fairly widely. The 50% deposit match is the one part reserved strictly for new users, and it only applies the first time you make a deposit on the platform.

By Adam Kenny

Sep 8th, 2026 11:47 AM EDT

NFL Week 1 brings a new way to play at Underdog, and you don't need to deposit to get involved. Eligible customers who sign up with Underdog bonus code BDCSocial can claim a virtual $1,000,000 pot for Keep Your Million, the platform's free-to-play survival game built around the opening slate. It's a different approach from most of the other best DFS sites, which usually ask for a deposit before you can enter anything.

New users can also take advantage of a 50% first deposit match worth up to $1,000 in bonus funds. That gives you extra funds for pick'em contests and best ball drafts as the NFL season gets underway.

Underdog NFL Bonus Code Details

Underdog Bonus Code	BDCSocial
Underdog Keep Your Million Offer	Free entry for Keep Your Million (all eligible new and existing users)
Underdog Deposit Match	50% first deposit match up to $1,000 in bonus funds (new users only)
Where It's Live	AL, AK, AZ, AR, CA, CO, DE, DC, FL, GA, IL, IN, KS, KY, MA, MD, MI, MN, MS, MO, NE, NH, NJ, NM, NC, ND, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VT, VA, WV, WI, WY

That footprint covers most regulated states, including for New Jersey sportsbook customers who already bet on the NFL each week, though availability can still shift depending on local rules.

What Is Underdog's Keep Your Million?

Keep Your Million is Underdog's free-to-play survival game built around NFL Week 1. Every eligible customer receives a virtual $1,000,000 pot to play with, including brand-new users and most existing account holders. There's no entry fee and no deposit is needed, which sets it apart from a typical sports betting no deposit bonus since there's no cash wager sitting behind it at all.

The idea is straightforward. Each round gives you a higher-or-lower NFL question tied to a Week 1 game. You decide how much of your current pot to put on each answer, and whatever survives moves on to the next round.

How to Play Keep Your Million on NFL Week 1

Getting through all 20 questions is as much about managing your pot as it is picking the right side, not unlike building a weekly set of betting picks. Here's how the format works.

Pick a question. Each round presents a Week 1 prop, such as whether Patrick Mahomes will throw for more or fewer than 275 passing yards.
Split your million. Use the slider to divide your current pot between Higher and Lower. You can put it all on one side or split it between both. The full pot has to be allocated.
Lock it in. Submit your pick before kickoff and it's locked. There are no changes once it's submitted.
Keep your winnings. Once the question settles, the amount on the winning side becomes your pot for the next round.
Run it back. Repeat the process for up to 20 questions. Make it through the full run and you can cash out whatever remains in Underdog bonus funds.

The format rewards a bit of bankroll management. Going all-in on every question gives you more upside, but one wrong answer wipes out the current pot. Splitting the pot across both sides can keep a run alive longer, although it also limits how quickly the balance can grow.

Underdog's NFL Week 1 Deposit Match

New users can pair Keep Your Million with Underdog's standard welcome offer. Make your first deposit and you'll receive a 50% match in bonus funds, up to $1,000. A $500 deposit, for example, adds $250 in bonus funds, which is a fairly generous rate as far as deposit match sportsbook offers go this NFL season. Those funds can be used across pick'em contests and best ball drafts.

The deposit match is separate from Keep Your Million, so claiming one doesn't prevent you from using the other. For new customers, that means there's a free-to-play Week 1 promotion alongside the regular first-deposit offer.

How to Claim the Underdog Bonus Code BDCSocial

The setup is quick, whether you're signing up on your phone or desktop.

Sign up for a new Underdog account through a link on this page.
Enter bonus code BDCSocial during registration.
Confirm that you're physically located in one of the eligible states listed above.
Opt into Keep Your Million to claim the free $1,000,000 pot for NFL Week 1.
Make your first deposit to trigger the 50% match, up to $1,000 in bonus funds.

Underdog NFL Bonus Code Terms and Conditions

Keep Your Million is available to eligible customers, including most existing users and new sign-ups.
The 50% deposit match is for new users only and requires bonus code BDC at registration.
The deposit match is worth 50% of your first deposit, up to $1,000 in bonus funds.
Keep Your Million pots are virtual bonus funds. They don't have cash value until converted through gameplay.
Once submitted, picks are locked and can't be edited or withdrawn before the game settles.
Availability varies by state, so check the Underdog app to confirm that you're eligible before signing up.

Why Play at Underdog for NFL Week 1?

Underdog is best known for pick'em contests, DFS and best ball drafts. NFL Week 1 is a natural fit for all three. Rather than following a single sportsbook line, you can make higher-or-lower picks across a range of player props and build entries around the outcomes you like, an approach that sits somewhere between traditional sports betting offers and pure fantasy contests.

Keep Your Million adds a free-to-play option for the season opener. It gives new users a chance to get familiar with Underdog's higher-or-lower format before putting real money into paid contests.

The Underdog app is available on iOS and Android, with draft boards and live contest features built into the platform, keeping pace with other leading DFS apps in a similar format. Responsible gambling tools, including deposit limits and self-exclusion, are also available to help players manage their activity.

Underdog Bonus Code FAQs

What is the Underdog bonus code for NFL Week 1?

The Underdog bonus code is BDCSocial, and it's worth entering during registration so both parts of the offer attach properly to your account. It unlocks the 50% first deposit match worth up to $1,000 in bonus funds, plus access to the free Keep Your Million promotion for eligible customers this NFL Week 1.

What is a fantasy entry in Underdog?

Is Keep Your Million really free to play?

What happens if I lose all my money in Keep Your Million?

Can existing Underdog users play Keep Your Million too?

About the Author

Adam Kenny

More About Adam

Adam has worked in online gambling for most of his adult life. Starting off with Paddy Power in the Flutter group, he moved on to work in Sportsbook Operations at Betbright before joining Bookies.com. His experience in the industry covers both sports betting and online casinos. Football, horse racing and NFL betting are his main passions on the sports side of things, but he has seen and reviewed hundreds of online casinos and thousands of casino games too.