How to Use Kalshi for March Madness 2026 (and Find Every Edge with LineScout)

TLDR

Kalshi is running a free $1 billion bracket challenge for March Madness 2026 - no deposit needed. Sign up with code SCOUT to get $10 free to trade with. Then use LineScout to find A+ rated games where the model probability diverges from sportsbook and prediction market prices, giving you real edge on every round of the tournament.

What is Kalshi?

Kalshi is a CFTC-regulated prediction market exchange where you trade on the outcome of real-world events - including sports. Instead of placing bets through a sportsbook, you buy and sell event contracts that pay out $1 if your prediction is correct.

For March Madness, that means you can trade on which team wins each game, directly on a federally regulated exchange. Kalshi is available in most US states and is one of the most liquid prediction markets in sports right now.

In 2025, Kalshi saw over $208 million in March Madness volume. In 2026, that number is expected to be significantly higher. Barron's

The $1 Billion Bracket Challenge

Kalshi is offering $1 billion to anyone who submits a perfect March Madness bracket. That means correctly predicting the winner of all 63 games in the 2026 NCAA Tournament.

The odds of a perfect bracket are approximately 1 in 9.2 quintillion - roughly equivalent to picking one grain of sand from every beach and desert on Earth and getting it right on the first try. A perfect bracket has never been publicly verified.

But that's the point. Kalshi is running this contest to illustrate how probability works - and why prediction markets offer a smarter approach than binary all-or-nothing picks.

Prize structure:

• $1 billion for a perfect bracket
• $1 million guaranteed for the highest-scoring bracket
• $500k to nonprofit iMentor
• $500k to Devin Booker's Starting Five charity

The $1B prize is financially backed by SIG Parametrics, LLC, a member of the Susquehanna International Group of Companies.

Bracket scoring:

• Round of 64: 10 points per correct pick
• Points increase in later rounds

Deadline: Brackets must be submitted before tip-off of the first game on March 19th, 2026, or 1pm EDT on March 19th - whichever is earlier. Full rules here

How to Enter and Get $10 Free

The bracket challenge is completely free to enter. You do not need to deposit or trade to participate - just create a Kalshi account and submit your bracket.

To enter:

1. Go to kalshi.com/billion-dollar-bracket
2. Create an account (age verification required, must be 18+)
3. Submit your bracket - one per person

For new users who want to start trading:

Sign up at this link with referral code SCOUT and get $10 free to start trading prediction market contracts. This gives you real money to trade March Madness games from Round 1 through the championship - no risk to start.

Note: The bracket challenge is not available to residents of Florida or New York. Trading restrictions may vary by state.

How Kalshi Markets Work for March Madness

Once you have your account, the real opportunity is the game-by-game markets. For each tournament matchup, Kalshi lists contracts on which team wins. You buy at the current implied probability price and collect $1 per contract if your team wins.

For example, if a contract is priced at $0.65, the market implies a 65% chance of that team winning. If you believe the true probability is 72%, you buy at $0.65 and have positive expected value on the trade.

That's the edge game - and it's exactly what LineScout is built to find.

For a deeper dive on Kalshi's market mechanics and how they compare to Polymarket, read our Kalshi vs Polymarket for sports trading guide.

What is LineScout?

LineScout is a sports prediction market intelligence platform that pulls Kalshi prices, Polymarket prices, and sportsbook consensus into a single dashboard - alongside its own proprietary probability model.

For each game, LineScout calculates the Scout Score (graded A+ through F) and an Edge value showing exactly how much your probability estimate diverges from each market's price.

If Kalshi prices a team at 60.5% and LineScout's model says the true probability is 68.2%, the Edge column shows +7.7 - a signal that the market is underpricing that team.

That A+ rated row on your dashboard is the output of a model recalculating in real time as lines move, right up until tip-off.

LineScout covers CBB and NBA, making it purpose-built for March Madness tournament trading. See how LineScout works.

How to Use LineScout and Kalshi Together

The combination is straightforward:

Step 1: Submit your bracket
Use Kalshi's bracket challenge as your macro read on the tournament. Which teams do you think are underseeded? Where do you expect upsets? This sets your overall tournament thesis.

Step 2: Open LineScout before each game
Before every tip-off, pull up LineScout and sort by Scout Score. The A+ and A-rated rows are the games where LineScout's model shows the largest divergence from Kalshi and sportsbook prices.

Step 3: Check the Edge columns
LineScout shows two edge columns per market - one for Kalshi and one for Polymarket. A +5.9 edge on Kalshi means LineScout's model assigns that team a 5.9 percentage point higher probability than Kalshi's current price reflects.

Step 4: Jump to Kalshi with one tap
LineScout links directly to the relevant Kalshi or Polymarket contract. One tap takes you from the edge signal to the execution screen. No tab-switching, no manual searching.

Step 5: Repeat for every round
From the First Four on March 17-18 through the Championship on April 6, new LineScout data refreshes for every active matchup. The A+ signal updates as markets react to injury news, line movement, and new information.

For a full walkthrough on tournament strategy, see the March Madness Prediction Market Guide.

Why This Combo Beats Going in Blind

Most people enter a March Madness bracket based on gut feel, ESPN rankings, or who they watched last week. Some research individual games but spend hours bouncing between Kalshi, Polymarket, and sportsbook sites to manually compare prices.

LineScout eliminates that. The entire market - Kalshi, Polymarket, sportsbook consensus, and the proprietary model - sits in one view with edge calculations already done for you.

For the 2026 tournament, that means:

• 63 games covered, from First Four to the Championship
• Real-time model updates before every tip-off
• Kalshi and Polymarket links built directly into the dashboard
• A+ to F grading so you know exactly which games to focus on

The bracket challenge is a fun way to engage with the tournament. The real edge is in the game-by-game markets - and that's where LineScout earns its place in your toolkit.

Get Started

New to Kalshi? Sign up here and use code SCOUT to get $10 free to start trading.

Then open LineScout before every game, filter by Scout Score, and let the model tell you where the edge is.

The First Four is already underway. Round 1 starts March 19th. Every game is a market - make sure you have the right intel before tip-off.