Political prediction markets let you turn an opinion about elections, policy, and politicians into a live, tradable price. In the United States, the legal path runs through Kalshi, the CFTC-regulated designated contract market that offers event contracts on everything from Senate control to presidential primaries. Offshore venues like Polymarket have historically served non-US residents and are increasingly working toward US-regulated access. If you want to express a political view with real money, in the open, without the gray area of sportsbooks or offshore betting sites, political prediction markets are the only fully legal retail option in the US today.
This guide walks through exactly how to do it: which platforms are legal, what you can trade, how pricing works, which strategies tend to make money, and how to stay on the right side of the IRS and your state’s rules.
Why Election Betting Was Illegal (And How That Changed)
For decades, betting on US elections sat in a legal gray zone. Nevada sportsbooks never offered presidential odds. State lotteries steered clear. The one small, licensed exception, the University of Iowa’s Iowa Electronic Markets, was capped at $500 per trader and operated under a tight no-action letter from the CFTC.
That changed in 2024 when a federal appeals court ruled in favor of Kalshi’s election contracts, allowing the exchange to list “which party will control the US Senate” and similar event contracts under CFTC oversight. For the first time in modern US history, retail traders could legally take positions on federal elections through a regulated exchange, with no state-by-state patchwork and no offshore workarounds.
Today, if you are a US resident over 18 and you have a bank account, you can open a Kalshi account, deposit, and trade political contracts the same afternoon.
Where to Trade Political Contracts Legally
There are three categories of venue, only one of which is cleanly legal for US retail traders.
| Platform | US Legal? | What You Can Trade | Typical Fees |
|---|---|---|---|
| Kalshi | Yes, CFTC-regulated | Senate, House, governor, presidential, policy outcomes | Taker 1-2%, maker often free |
| Polymarket | Non-US only (US access via regulated acquisition in progress) | Elections globally, geopolitics, policy | 0% maker/taker, gas fees |
| Offshore sportsbooks | No, illegal for US residents | Election “props” | Vig 5-10% |
Kalshi is where US traders should start. It takes USD deposits by ACH, debit card, or wire, offers both limit and market orders, and settles contracts in cash based on verified outcomes. Full details on account setup and current markets are at our Kalshi platform page.
What Political Contracts Actually Look Like
A political prediction market contract is a binary bet that pays $1 if a specific outcome happens and $0 if it doesn’t. The price you pay for a “Yes” share, between 1 cent and 99 cents, is roughly the market’s implied probability of the event.
If “Democrats control the Senate after 2026” trades at 42 cents, the market is saying there is about a 42% chance of that outcome. Buy 100 shares at 42 cents (total cost $42). If Democrats take the Senate, you receive $100. If they don’t, you receive $0. The max loss on any contract is what you paid.
Common political contract types on Kalshi today:
- Chamber control: Which party controls the Senate or House after the next election
- Individual races: Specific Senate, House, and gubernatorial contests
- Presidential nomination: Who wins each party’s primary
- Policy outcomes: Will a specific bill pass Congress by a certain date
- Confirmation votes: Will a Supreme Court or cabinet nominee be confirmed
- Executive actions: Will the president sign a specific executive order by a date
Strategies That Actually Work
Political markets are often better calibrated than polls, especially late in a cycle, but they are not perfectly efficient. Edge comes from a few repeatable patterns.
Fade overreactions to single polls. One unusual poll can move a market 3-5 cents in minutes. If the underlying race has not fundamentally changed, those moves tend to revert within 24-48 hours as more polls arrive. Watch for prices that move hard on a single Rasmussen or Marist release.
Trade the convention bump. Nominees reliably get a 2-4 cent boost in general election markets during their party’s convention, and that bump typically fades within two weeks. Selling into the peak and buying back after the fade is one of the oldest, most repeatable election-market trades.
Arbitrage individual races against chamber control. If every individual Senate race on Kalshi implies a 55% probability of Democratic Senate control but the “which party controls the Senate” contract is priced at 48%, there is a real inefficiency. These gaps appear during fast-moving news cycles and close within hours.
Avoid the long-shot tax. Contracts priced under 5 cents are systematically overpriced by small retail buyers hoping for a 20x payoff. If you are going to take long-shot positions, be the seller, not the buyer.
Managing Risk and Position Sizing
Even a well-calibrated political view can lose. Treat each contract as a probability bet, not a prediction. The right sizing framework is Kelly, scaled down: never risk more than a small fraction of your bankroll on any single contract, and never load up on correlated positions. If you are long “Democrats take the Senate,” “Democrats take the House,” and three specific Democratic Senate races, you are really making one bet five times.
Set a hard cap for political exposure as a percentage of your prediction-market bankroll. 20-30% is reasonable for an active trader. Everything above that should be in diversified contracts across economics, sports, and crypto, which is where our rankings of the best prediction markets can help you compare platforms side by side.
Taxes and Reporting
Kalshi profits are reported to the IRS. The exchange issues a 1099-B for traders who meet reporting thresholds, and gains are treated as short-term capital gains in most cases, taxed at your ordinary income rate. Losses can offset gains. Keep records of every trade, because the 1099-B only summarizes net results, not the trade-by-trade detail you may need for an accurate return.
Political contracts have no state-level gambling tax implications, because they are regulated as commodity derivatives, not wagers. That is the single biggest practical difference between trading on Kalshi and placing a political “bet” offshore.
Start Here
If you are new to political prediction markets, the fastest path is to open a Kalshi account, fund it with a small amount, and start by trading a race or policy outcome you already follow closely. Watch how your price moves relative to news, learn to read the order book, and scale up only after you have a sense of how fast political contracts can move around debates, polls, and surprise events.
For a full breakdown of the top US prediction market platforms, pricing, and features, see our best prediction markets rankings. To get started on the two biggest political contract venues, visit our Kalshi and Polymarket platform pages.