Money & Taxes

Prediction Market Reality Check

"I'm not gambling, I'm predicting." The platforms call them "event contracts." The math calls them bets.

// The number they don't put on the homepage

84%

of prediction market traders lose money

Andrey Sergeenkov, on-chain analysis of 2.5 million Polymarket wallet addresses via Dune Analytics (April 2026). A separate academic study from HEC Montréal, University of Toronto, and ESSEC Business School found 71% of 1.4 million users lost money across $20 billion in volume.

Where the money actually goes

Top 0.04%

70% of profits

Top 1%

84% of profits

Everyone else

16% of profits

Only 2% of traders have ever made more than $1,000. Only 0.033% (840 out of 2.5 million) ever made over $100,000. The top traders use automated systems, early information access, and sophisticated data models. You're competing against them with your phone on the couch. (Source: Sergeenkov/Dune Analytics, April 2026; DeFi Oasis on-chain analysis, December 2025)

// How event contracts actually work

The $1 game

Every prediction market works the same way. You buy a contract for a price between 1¢ and 99¢. If you're right, you get $1. If you're wrong, you get $0. The price reflects what the market thinks the probability is. A contract at 70¢ means the market thinks there's a 70% chance it happens.

Try it yourself

Enter a contract price and see what you actually need to happen to make money.

Contract price (cents)

Number of contracts

// The spread: the invisible tax

Yes + No should equal $1. It never does.

If you add the price of the "Yes" contract and the "No" contract for the same event, you'll get something like $1.01 to $1.05. That extra amount is the spread. It's the platform's built-in edge, and it means that even before the event happens, the market has already taken money from traders as a group.

Yes price (cents)

No price (cents)

// "But it's not gambling"

What prediction markets say

"We're a CFTC-regulated exchange." "You're trading event contracts, not placing bets." "The market aggregates information to produce accurate probabilities." "This is a financial market, not a casino."

What the math says

You pick an outcome. You put money on it. If you're right, you get paid. If you're wrong, you lose your money. The platform takes a cut either way. 84% of participants lose. The structure is identical to a sportsbook — the language is just different. A lawmaker recently called it "a casino where the rich and powerful are the house and everyone else is the chips."

The psychology that makes it feel different

Prediction markets are designed to make you feel smart, not lucky. You're "analyzing events" instead of "placing bets." You're "trading contracts" instead of "gambling." You see an order book and bid-ask spreads, which feel like a stock exchange, not a sportsbook. But the outcome is binary (you're right or you're wrong), and the loss rate (84%) is nearly identical to sports betting (roughly 80-85% of bettors lose long-term).

// Kalshi vs Polymarket

Kalshi

CFTC-regulated (US)
Up to 2% fee per trade
Sports, politics, culture, crypto
Uses real dollars
Must be 18+, ID verified
Valued at $22 billion

Polymarket

Crypto-based (USDC)
~0.05-0.07% taker fee
Politics, crypto, world events
Uses cryptocurrency
Less regulated
$9.8B monthly volume

Kalshi's regulation doesn't protect you from losing money. It protects you from the platform disappearing with your money. Those are two very different things. On either platform, the math is the same: most people lose.

// The monthly salary test

Can you actually make a living doing this?

The average US salary is about $5,000/month. Enter your monthly income goal.

Monthly income goal

// Bottom line

We're not telling you not to do it.

We're telling you to do it with your eyes open. If you put $100 into a prediction market for entertainment — the way you'd spend $100 at a casino — that's your call. But if you're putting rent money on event contracts because a TikTok account told you it's smarter than sports betting, you should know that 84% of the people who tried that are in the red. The platforms are real. The regulation is real. The losses are also real.