You need to be at least 18 years old to sign up for and use Kalshi.

Quick answer

  • Minimum age to use Kalshi: 18+ only, no exceptions.
  • You also must be a U.S. resident and pass ID / age verification (government ID, DOB, sometimes SSN details).
  • If you are under 18, you cannot legally open an account, even with parent permission.

Why the age is 18, not 21

Kalshi is regulated as a financial-style prediction market (a derivatives exchange) under the CFTC, rather than as a traditional sportsbook under state gambling regulators.

That means:

  • The platform aligns its minimum age with the usual U.S. “age of majority” for contracts, which is 18.
  • Traditional sportsbooks often require 21+ because they fall under state gambling laws; Kalshi’s CFTC framework allows the lower 18+ cutoff.

Other key eligibility rules

Even if you’re 18+, there are a few more requirements:

  • Must be a U.S. resident with a legal U.S. address in a state where Kalshi operates.
  • Some states are blocked or restricted, so availability depends on where you live.
  • You’ll go through KYC/identity checks (DOB, address, government ID, usually last four of SSN) during signup.
  • Accounts opened with false information can be suspended and funds withheld under Kalshi’s rules.

Mini “forum-style” take

“So how old do you have to be to use Kalshi?”
On current sites and reviews discussing Kalshi’s rules, users consistently report that the official minimum is 18+, verified via ID , with no workaround for minors.

TL;DR: If you’re asking “how old to use Kalshi,” the answer in 2026 is: 18 years or older, U.S. resident, and able to pass ID verification in an eligible state.

Information gathered from public forums or data available on the internet and portrayed here.