Why Can an 18-Year-Old Bet on Kalshi When He Can't Walk Into a Casino?

The question reaches me in almost the same words every time. He says he isn't gambling, he's trading. Is he right?

He isn't. But I understand completely why that answer doesn't feel obvious, and I don't think parents should feel foolish for hesitating. The law itself hesitates. That's the whole problem.

What a prediction market is

Take away the vocabulary and it's simple. You're buying a yes-or-no answer to a question about something that hasn't happened yet.

Will the Chiefs cover the spread? Will this candidate win? Will it rain in Dallas on Tuesday? You buy a contract for somewhere between one cent and ninety-nine cents. If you're right, it pays out a dollar. If you're wrong, you get nothing.

That's the whole product.

The pricing is what makes it feel like finance. A contract at sixty-five cents means the market puts the odds around sixty-five percent. You can buy and sell before the event resolves, watch the price move, get out early, double down. It carries the rhythm and the language of a trading floor.

But you are picking a side and risking money on an uncertain outcome.

I want to be careful here, because I don't think the young people using these platforms are confused. In my experience they know exactly what they're doing. What has changed is that betting has become so ordinary, so folded into watching a game, that it no longer registers as gambling. It registers as participating. Which means the fix isn't correcting anyone's vocabulary. He already knows what it is.

The language isn't fooling them. It's fooling the rest of us, and it's what made this legal.

The age gap

In most states, you must be twenty-one to walk into a casino, and twenty-one to open a sportsbook account. Prediction markets are regulated federally as financial markets rather than as gambling, so the minimum age is eighteen. Same as opening a brokerage account.

An eighteen-year-old freshman who legally cannot place a bet at a sportsbook can trade sports contracts from his dorm room. In all fifty states, including Texas, where I practice and where sports betting still isn't legal at all.

Nobody designed this as a loophole for teenagers, but that is how it functions, and the eighteen-to-twenty crowd has found it. It's the only door open to them.

How fast this happened

Kalshi handled under two billion dollars in trades in 2024. Almost twenty-four billion the next year. During the 2026 World Cup, analysts estimated prediction markets accounted for more than a quarter of all the legal sports betting in this country, up from less than a tenth in January. Kalshi has spent an estimated thirty-two million dollars on national TV ads this year.

It isn't confined to specialty apps, either. Robinhood, where a lot of young people opened their first investment account, now offers the same contracts. Last quarter Robinhood made more money from event contracts than from stocks or crypto, more than ten times what it made a year earlier.

Consider what that means for a twenty-year-old who already has Robinhood on his phone. Nothing to download. Nothing to hide. The betting sits one tab over from his index funds.

Then the sportsbooks moved in. DraftKings launched its own prediction markets app in thirty-eight states at the end of 2025, FanDuel had prediction markets in all fifty states by mid-January, and Fanatics got there before either of them. All of it runs through federally regulated exchanges, which means all of it operates at eighteen and up.

So, the same company runs two apps. On the sportsbook, your son has to be twenty-one in most states and a state regulator is watching. On the prediction app, he has to be eighteen, and it works in California, Texas, Florida, and Georgia, where that company's sportsbook cannot legally take a bet.

What concerns me

Four things, and none of them have much to do with the technology.

There is no off switch. A football season ends. Prediction markets never close. There is always an election, an economic report, a weather outcome, an awards show, a crypto price. Something is always resolving. For a young person whose gambling tracks stress or boredom or loneliness, nothing in the calendar ever tells him to stop.

Chasing looks like strategy. This is the one I'd watch hardest. When someone chases losses at a sportsbook, most families can eventually name what they're seeing. When someone chases losses on a platform that calls it a position, he can describe himself as averaging down, managing risk, waiting for the market to correct. It sounds sophisticated when he says it to you. It works on him too, and that is what worries me. The vocabulary gives the problem somewhere to hide, and it pushes back the day he recognizes it as a problem.

The odds are what they are. Several separate analyses of Polymarket, the one large platform whose trading records are public, have put the share of users losing money somewhere between seven and eight in ten, with the winnings concentrated in a tiny group at the top. That's the math, not a comment on anyone's intelligence.

The safety nets don't reach here. This is the practical one, and it's the reason I wanted to write this. If your son or daughter has enrolled in a state self-exclusion program as part of a recovery plan, that program almost certainly does not cover prediction markets, because the state does not classify them as gambling. Blocking software may or may not catch these platforms depending on how they're accessed. If your family is relying on either, verify coverage of these specific apps directly. Please don't assume.

That last point matters more in gambling recovery than families expect. With substances, you can get the substance out of the house. Here the triggers are a phone and access to money, and neither one can be removed from a young adult's life. Which is why what happens at home during the transition back matters so much.

If you're seeing this at home

Don't lead with the definition fight. It's tempting to want to win the argument about whether this is really gambling, and it goes nowhere.

Ask about the money instead. How much is in the account? Where did it come from? Has it been up and down, or mostly down? Money is concrete, and it's harder to argue with than a definition.

Then ask how he feels while he's doing it, and how he feels afterward. You will learn more from that than from any argument over terms.

And if what you find frightens you, I'd ask you not to fix it by covering the losses. That impulse is one of the most understandable things I see in this work, and it's also the one that most reliably makes things worse. Paying off gambling debt doesn't create a fresh start. It creates room to keep going. The money is the symptom, and controlling access to it is one of the few things a family actually can control.

You don't need to have any of this figured out before you ask for help.

If you want to talk

I work with young adults and families dealing with gambling, and I'm always willing to talk with a parent who is trying to make sense of what they're looking at. You can reach me through this site.

If you're looking for a counselor elsewhere, gambling-specific training genuinely matters. The ICGC credential is the standard worth asking about, and the National Council on Problem Gambling keeps a directory.