Kalshi vs. Polymarket: Which Platform Fits You?

Category	Kalshi	Polymarket U.S.
Current offer	Make a $25 trade and you get up to $500 in bonus funds. The requirement can be met through cumulative trades. New users only; terms apply.	Make a first deposit of at least $10 and get a $20 trading bonus. New users only; terms apply.
Offer eligibility*	Must be at least 18 and located in an eligible U.S. jurisdiction. Current state exclusions apply.	Must be at least 18 and located in an eligible U.S. jurisdiction. Current state exclusions apply.
Good fit for	Traders who want more categories, desktop access, and lots of funding options.	Traders who prefer an app-led setup and follow sports or political markets.
Federal status	Kalshi has held designated contract market status since November 2020.	QCX LLC, doing business as Polymarket US, received designated contract market status in July 2025.
Product setup	A U.S.-regulated exchange with its own order books, market rules, and settlement procedures.	A U.S.-regulated, dollar-based product that operates separately from Polymarket International.
Funding methods	ACH, cards, digital wallets, crypto deposits, and wire transfers. Limits, fees, and withdrawal holds vary.	ACH bank transfers and card payments through the U.S. product.
Current market categories	Huge market coverage with sports, politics, culture, crypto, commodities, climate, economics, finance, technology, and other event contracts.	Sports, politics, and other U.S. event markets. Availability changes, and the U.S. menu is separate from Polymarket International.
Trading fees	Kalshi charges a fee when a trade is completed. The amount depends on the contract price and the potential payout. Some markets use a different fee schedule, and certain limit orders may also carry a maker fee.	Polymarket U.S. charges taker fees on orders that fill right away. The fee changes with the contract price. Limit orders that add contracts to the order book may earn maker rebates, while frequent traders may qualify for additional rebates.
Order books	Liquidity varies by contract. Check the bid, ask, and available size.	Polymarket has deeper liquidity in global and political markets, though it varies by contract and shouldn't be inferred from Polymarket International volume.
Payout structure	A standard winning binary contract settles at $1, while the losing side settles at $0, subject to the listed market rules.	A winning U.S. binary contract settles at $1 and the losing side at $0, subject to the contract terms.

*State note: The eight-state exclusion list reflects the current offer terms as of July 2026. It shouldn't be treated as a permanent legal map for every prediction market or event contract. Platform access, market availability, and state requirements can change.

Related Reading

• A Beginner’s Guide to Kalshi: A Lightly-Technical Explainer of Contracts & Pricing
• A Beginner’s Guide to Polymarket: Everything You Need to Know About Contracts & Pricing

Kalshi vs. Polymarket Welcome Offers and Promo Terms

Kalshi and Polymarket use different qualifying steps. With the Kalshi promo code ACTION, you must trade $25 on prediction markets. Kalshi gives you up to $500 in trading credits. Credits may need to be claimed through the Rewards section and usually expire after 30 days unless the offer lists a different deadline.

Polymarket ties its bonus to your first deposit. Deposit at least $10 and the credit is added without requiring a completed trade first.

Verdict: Kalshi lists the bigger possible payout at up to $500, but the reward is variable and usually lands lower. Polymarket's $20 is smaller and guaranteed once your first deposit clears. Which one is worth more comes down to whether the credit lands on markets you were already going to trade.

Choosing the Right Exchange for Your Trading Style

Kalshi’s interface sits somewhere between a brokerage account and a live event board. You can look at active markets, follow sports contracts, and monitor your positions from the same account, while the desktop site gives you more room to compare multiple contracts at once. Polymarket U.S. keeps more of the experience inside its app, which may suit traders who mainly check markets and place orders from their phones.

Take a busy Saturday, for example. If you’re the type who likes to line up a few angles before first pitch (checking season futures, scanning multiple markets, maybe comparing prices side by side), Kalshi’s layout on a larger screen makes that easier. You can keep several contracts open, move between them quickly, and get a clearer view of how prices stack up.

If your routine is more reactive (checking odds after lineups drop, making a quick move from your phone while you’re out), Polymarket’s app-first setup can feel more natural. It’s built for quick checks and faster entries without needing to move through multiple tabs or windows.

That difference shows up most on days with a lot going on. If you like to slow things down and compare before committing, Kalshi tends to fit better. If you’re making quicker decisions in shorter windows, Polymarket may line up more with how you trade.

Either way, when both platforms list the same outcome, check both before placing the order. One exchange may show the lower price, while the other has more contracts available near it.

How Prediction Markets Work: Event Contracts and Order Books

Prediction markets let you trade contracts tied to future events. For example, a sportsbook sets the odds you see, but an exchange works differently: traders post buy and sell orders, and those orders create the price.

Say a Chiefs contract trades at 60 cents. That suggests the market gives the outcome about a 60% chance. It's not a guarantee, and the price can move as new orders come in, especially after lineup news, injuries, weather updates, or other information that changes how traders view the event.

That same game can also have several separate markets. A Chiefs card might include a winner contract, a point spread, a total, and player props, where each one has its own price, available size, and settlement terms.

Because of that, when you’re looking at Kalshi and Polymarket side by side, don’t assume they’re listing the same thing just because the game is the same. The wording can differ, and that can change how the contract settles.

How to Compare a Contract Before You Trade

The price you see on the screen doesn’t always apply to a large number of contracts.

For example, a Cardinals YES contract might show a price of 42 cents, but that price only applies to a limited number of contracts, say, 10. Beyond that, the next available sellers might be asking 46 cents for the next batch. If you place an order to buy 20 contracts all at once, your order will fill in pieces: 10 at 42 cents, then the next 10 at 46 cents. That gives you an average price of 44 cents before fees. So while the 42-cent price was accurate, it only applied to part of your order, not the full amount you wanted to buy.

Both Kalshi and Polymarket U.S. run on order books. Think of it as a live list of offers from other traders showing who’s willing to buy, who’s willing to sell, at what price, and for how many contracts. When you place a market order, you’re agreeing to take whatever prices are currently available. It fills right away, starting with the best price and moving down the list if your order is larger than what’s offered at that level.

A limit order works differently. You choose the exact price you’re willing to pay (or accept), and your order sits in the book until another trader matches it. It gives you more control over the price, but the downside is that there’s no guarantee it will fill.

Before placing a trade, it helps to slow down and look at a few details that can affect your entry price and overall risk:

• Price gap: Look at the difference between the highest bid and lowest ask. A big gap can mean worse prices when you buy or sell.
• Available size: Check how many contracts are actually available at that price. You may need to pay more if there aren’t enough.
• Order type and fees: Market orders fill right away but may cost more. Limit orders let you pick your price but might not fill.
• Contract terms: Make sure you understand what the contract is for, how it settles, and when.

On Polymarket U.S., taker fees depend on the contract price and they tend to be highest around 50 cents, where the outcome is most uncertain, and lower when prices are closer to 0 or $1. Some limit orders that sit on the book can earn a rebate instead.

For example, a contract priced at 35 cents implies about a 35% chance. If you buy YES at that price and it settles at $1, your profit is 65 cents per contract before fees. If it settles at $0, you lose the 35 cents you paid. 

Kalshi also offers crypto perpetual futures, which sit outside this standard event-contract setup. They use margin, can be liquidated, and don't settle like a regular YES or NO contract.

Funding Kalshi and Polymarket U.S. Accounts

Both U.S. platforms use dollar-based balances.

Polymarket U.S. accepts ACH bank transfers and debit card deposits through its app. The USDC wallet process used by Polymarket International doesn't apply to the regulated U.S. exchange.

Kalshi supports more payment methods, including ACH, debit card, Apple Pay, Google Pay, PayPal, Venmo, Cash App deposits, crypto, and wire transfers. Its usual minimum deposit is $10, while wire transfers require at least $1,000.

Cash App can only be used for deposits, and PayPal or Venmo may not appear in every state. Processing times, fees, and withdrawal holds can also differ by method, so check those details before funding the account.

Kalshi vs. Polymarket: Political and Sports Markets

Political and sports markets don’t move the same way. In sports, prices can change within minutes as lineups get posted, a starter is scratched, or weather changes. Political markets tend to move more slowly. They can stay open for months and react to things like new polls, court rulings, debates, or legislative votes.

It’s also common for news to move the price before anything is officially decided. A network might call a race, a candidate might concede, or early results might come in, but the contract won’t settle until the exchange has the official outcome it requires.

Kalshi and Polymarket U.S. both offer political markets, but the wording of the question makes a huge difference. “Which party wins the most House seats?” isn't the same as “Which party controls the House on a specific date.” Recounts, delayed certifications, or changes after the election can lead to different results depending on how the contract is written.

For a closer look at each platform’s political coverage, check out our review of Kalshi election markets and Polymarket election markets.

Active Sports Markets: Read the Contract First

Sports markets can look simple at first, but how a contract is written can completely change the result. One game usually splits into several markets: the regulation result, the match winner, the tournament or series winner, total goals or runs, and player props, and each one settles on its own terms.

That's where people get caught. Say a knockout soccer game is level after 90 minutes and gets decided in extra time. A contract on a team to win in regulation loses, since it only counts the first 90. A contract on that same team to win the match lands, because it includes extra time and penalties. Same game, same team, opposite result.

Before entering sports contracts on either platform, check a few basics:

• Time covered: Does the contract include regulation only, or does it extend to overtime, extra time, or penalties?
• Schedule changes: What happens if the game is postponed, shortened, or canceled?
• Result source: Which official league or governing body determines the final result?
• Corrections: Can stat changes or official revisions affect how the contract settles?

You can usually find these details right on the contract page. Kalshi clearly lists settlement timing and the source used to verify results, and Polymarket gives users similar information within each listing, explaining how the contract resolves and what counts as official.

Another thing to keep in mind is how quickly prices react. On both Kalshi and Polymarket, markets usually react immediately to news. A rumored lineup change, injury report, or early leak can shift prices before anything is confirmed. That doesn’t mean the contract has settled; it just shows how traders are responding in real time.

Like all event contracts, sports contracts can lose their full value. So, whether you’re trading on Kalshi or Polymarket, it’s important to manage your position size and avoid chasing losses if the market moves against you. Make sure to always keep responsible trading practices at the forefront.

Related Reading

• How Do Prediction Markets React to Rumors vs Information?
• Spotify Top Songs Predictions on Kalshi
• Grand Theft Auto 6 Prediction Markets