{"id":47522,"date":"2026-07-10T17:13:12","date_gmt":"2026-07-10T17:13:12","guid":{"rendered":"https:\/\/cryptomag.finance\/?p=47522"},"modified":"2026-07-10T17:13:12","modified_gmt":"2026-07-10T17:13:12","slug":"kalshi-vs-polymarket-2026-fees-markets-us-legality","status":"publish","type":"post","link":"https:\/\/cryptomag.finance\/?p=47522","title":{"rendered":"Kalshi vs Polymarket 2026: Fees, Markets & US Legality"},"content":{"rendered":"

Two years ago the choice in the prediction market space was pretty straightforward. Polymarket was the crypto-native platform Americans weren\u2019t meant to touch while Kalshi was the regulated US exchange that played by the book. Fast forward to today and there are multiple other prediction market platforms like Rothera, Predictdotfun, Opinion, Limitless etc that are looking to bite away at the market share. Despite competition ramping up, Kalshi and Polymarket are by far the leaders in terms of volume, number of trades and open interest.\u00a0<\/p>\n

The line from two years ago, however, has mostly dissolved. Polymarket now runs a CFTC-licensed US arm and despite Kalshi fighting roughly a dozen states in the US over whether sports contracts count as gambling, the latest numbers on combined trading volume between the two platforms hit $47.5 billion in the month of June alone this year. That\u2019s more than triple the roughly $14 billion a month US sportsbooks averaged in 2025, per Pew Research Center<\/a>.\u00a0\u00a0<\/p>\n

Kalshi vs Polymarket at a Glance\u00a0<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n
Kalshi<\/strong><\/td>\nPolymarket<\/strong><\/td>\n<\/td>\n<\/tr>\n
Underlying model<\/strong><\/td>\nCFTC-regulated exchange (DCM), central order book, settles in US dollars<\/td>\nOnchain protocol on Polygon, order-book matching, settles in USDC<\/td>\n<\/tr>\n
Fees (taker\/maker)<\/strong><\/td>\nTaker peaks near 1.75\u00a2 per contract at 50\u00a2, using the formula 0.07 \u00d7 price \u00d7 (1 \u2212 price); maker roughly a quarter of that. No ACH fee, up to 2% debit-card fee<\/td>\nCategory taker fees since March 30, 2026: up to $0.75 per 100 shares on sports, about $1.00 on politics, up to roughly $1.75 on crypto. Geopolitics markets are free. Makers pay $0 and collect rebates<\/td>\n<\/tr>\n
Markets offered<\/strong><\/td>\nSports, politics, economics (CPI, Fed, GDP), finance, weather, culture, crypto prices, corporate events; a large curated catalog<\/td>\nSports, politics, crypto, finance, culture, mentions, geopolitics and world events; thousands of markets, including ones a US exchange can\u2019t list<\/td>\n<\/tr>\n
US legality<\/strong><\/td>\nCFTC-licensed, technically legal in all 50 states and DC; sports contracts contested in about a dozen states, with split court rulings<\/td>\nInternational platform geo-blocked in the US; Polymarket US (CFTC-licensed through its QCX purchase) is legal but separate, with much smaller liquidity<\/td>\n<\/tr>\n
Trading volume (June 2026)<\/strong><\/td>\n$33.0 billion<\/td>\n$14.5 billion<\/td>\n<\/tr>\n
Custody<\/strong><\/td>\nUSD held in segregated accounts under CFTC rules; USDC deposits safeguarded by Coinbase Custody; not FDIC-insured<\/td>\nSelf-custodied USDC in your own wallet or the market\u2019s smart contract; not FDIC or SIPC insured<\/td>\n<\/tr>\n
Payouts\/settlement<\/strong><\/td>\nResolves within hours against named sources (AP, ESPN and the like); disputes run through a regulated process<\/td>\nSettled by the UMA oracle plus an integrity committee; disputes go to a 48-to-96-hour vote; payout is instant once resolved<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

Fees Compared\u00a0<\/h2>\n

Kalshi charges on nearly every trade. Polymarket, for most of its life, charged almost nothing. That gap narrowed hard on March 30, 2026, when Polymarket switched on taker fees<\/a> across nearly every category except geopolitics and world events, which stay free. Both platforms now use a probability-weighted curve, so the fee is highest on coin-flip markets near 50\u00a2 and shrinks toward the extremes.\u00a0<\/p>\n

Kalshi\u2019s taker fee<\/a> follows 0.07 \u00d7 price \u00d7 (1 \u2212 price) per contract, which tops out around 1.75 cents on a 50\u00a2 contract and falls off fast on lopsided markets. Post limit orders instead and the maker fee drops to about a quarter of that. Polymarket flipped the logic: makers pay nothing at all and even earn a slice of taker fees back through its rebate program, while takers pay a category rate that peaks at 50\u00a2 and lands anywhere from $0.75 per 100 shares on sports to roughly $1.75 on crypto. Its US-regulated arm runs a simpler flat model, a taker fee around 0.3% with a maker rebate.\u00a0<\/p>\n

Here\u2019s what a $100 position at 50\u00a2 (200 contracts or shares) actually costs to enter:<\/p>\n

\n\n\n\n\n\n\n\n\n
Trade type<\/strong><\/td>\nKalshi<\/strong><\/td>\nPolymarket (International)<\/strong><\/td>\n<\/tr>\n
Taker, sports<\/td>\n~$3.50<\/td>\n~$1.50<\/td>\n<\/tr>\n
Taker, politics<\/td>\n~$3.50<\/td>\n~$2.00<\/td>\n<\/tr>\n
Taker, crypto<\/td>\n~$3.50<\/td>\n~$3.50<\/td>\n<\/tr>\n
Taker, geopolitics<\/td>\n~$3.50<\/td>\nFree<\/td>\n<\/tr>\n
Maker (limit order)<\/td>\n~$0.88<\/td>\n$0<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n

The pattern is clear enough. On sports and most non-crypto markets, Polymarket International is cheaper to take, sometimes by half. On crypto they\u2019re roughly even. And if you can sit on a limit order and wait, Polymarket\u2019s zero maker fee is tough to beat, while Kalshi still clips you a little. What that table hides is everything around the trade: Kalshi funds in dollars for free over ACH, while Polymarket means buying USDC first, which can carry a 2% to 4% on-ramp fee depending on the route you take.<\/p>\n

What you can bet on\u00a0<\/h2>\n

Both platforms offer thousands of event-based contracts across several broad categories to choose from. That said, when you look at the trading volume metrics between the two, it becomes evident which markets each platform specializes in. For instance, when you look at the split in volume in sports based contracts between the two platforms, Kalshi currently holds a dominance of 71.5%. On the other hand, when it comes to contracts within the politics category, Polymarket is the go to platform with 97.3% dominance.\u00a0<\/p>\n

That split can actually be traced back to the strategies employed by both platforms. Over the past year, eventhough both platforms landed the NHL as the first major league to back prediction markets<\/a>,\u00a0 Kalshi has leaned harder into sports, signing the Chicago Blackhawks as the first North American pro team to partner with a prediction market, adding Madison Square Garden, and running a World Cup blitz that included sponsoring the reigning-champion Argentine Football Association. Meanwhile Polymarket built its name on the 2024 US elections and never really gave up its lead on political event markets.<\/p>\n

The sharper difference is what each one is allowed to touch. Kalshi\u2019s contracts are listed based on whatever\u2019s within CFTC purview. This includes categories such as sports, economics, rates, elections, weather, entertainment, crypto prices. Polymarket\u2019s international platform does not follow these guidelines and hence lists markets on war, military strikes and regime change that no regulated US platform would list. If you want to trade the outcome of a live global crisis the hour it breaks, Polymarket usually has the market first.\u00a0\u00a0<\/p>\n

US legality & who can trade<\/h2>\n

On paper, both Kalshi and Polymarket US are CFTC-regulated and legal in all 50 states and Washington DC. In practice, a wall of state challenges has turned that into a moving target, and almost all of it centers on sports.<\/p>\n

Kalshi holds the first federal license the CFTC ever granted an event-contract exchange<\/a>, dating to 2020, and it operates in dollars with the kind of oversight a US brokerage user would recognize. But since late 2025 more than a dozen states have argued its sports contracts are unlicensed gambling, and the courts have split. Kalshi won a landmark ruling at the Third Circuit on April 6, 2026, the first appeals court to say the CFTC has exclusive jurisdiction, and it won a preliminary injunction in Tennessee in February. It lost ground elsewhere. A New York federal judge refused to block state enforcement on July 8, 2026, and courts in Maryland, Arizona, Nevada and the Sixth Circuit have leaned toward the states. Minnesota went further and passed an outright ban that takes effect August 1, 2026. The CFTC has now sued nine states to defend its turf<\/a>, and most observers expect the fight to reach the Supreme Court.\u00a0<\/p>\n

Polymarket\u2019s US story is different. Its main international platform is geo-blocked for Americans, and using a VPN to get around that isn\u2019t permitted. This remains to be the case even after the platform has been in active discussions with CFTC to lift the ban on US-based users<\/a>. To trade legally in the US, Polymarket bought a CFTC-licensed exchange, QCX<\/a>, and stood up a separate Polymarket US app in December 2025. It\u2019s legal, it\u2019s regulated, and it\u2019s walled off from the global liquidity pool, which is exactly why its volume is a fraction of the international side. American traders essentially pick between a regulated venue with thinner books and an offshore one they\u2019re not supposed to use.\u00a0<\/p>\n

Trading volume & market share<\/h2>\n

Kalshi is the current volume leader, and at the time of writing it isn\u2019t close. Data from Artemis <\/a>shows that total weekly volume across all platforms hit a new all time last week topping out at $16.6 billion. When you look at the split, however,\u00a0 Kalshi still dominates with 66.9% market share and Polymarket at 25.3%. The 2026 FIFA World Cup lit the whole sector up. Kalshi\u2019s single World Cup winner market drew north of $800 million in bets, and combined monthly volume across both platforms jumped 75% in June alone. Total volume across prediction markets in May were already at new highs.<\/a> However, the World Cup catapulted the monthly volume from around $28 billion to $51.7 billion in June.\u00a0<\/p>\n

\"\"<\/figure>\n

Source: Artemis<\/p>\n

Those numbers deserve a second look before anyone treats them as settled. Volume counts every contract that changes hands, not the money actually sitting in the market, so the headline totals run well above the capital in play. Trackers don\u2019t measure it uniformly and they cover different sets of platforms, so the totals shift from one source to the next.\u00a0<\/p>\n

There\u2019s also a wash-trading question hanging over Polymarket\u2019s history<\/a>. A Columbia University study<\/a> estimated that roughly a quarter of its past volume may have been wash trades, which the researchers tie to airdrop farming on a no-KYC, zero-fee platform, and whether the new fee structure cleans that up will only show over the coming months.\u00a0<\/p>\n

Custody, wallets & payouts<\/h2>\n

This is the cleanest line between the two, and it comes down to who holds your money. Kalshi runs like a traditional exchange. You fund in dollars by bank transfer or debit card, your cash sits in segregated accounts under CFTC rules, and USDC deposits are safeguarded through Coinbase Custody. Winnings land in your dollar balance and withdraw back to your bank. Kalshi does place a short security hold<\/a> on deposited funds first, generally around two days after a debit or bank transfer settles, with wires, PayPal and Venmo carrying none, and that hold applies only to what you put in, not your earnings, which can be withdrawn right away. Worth knowing: segregation is a real protection in a bankruptcy, but Kalshi isn\u2019t a bank, and event contracts aren\u2019t FDIC-insured.<\/p>\n

Polymarket hands custody to you. Funds live in your own wallet or in the market\u2019s smart contract on Polygon, denominated in USDC, and the platform never holds your keys. Withdrawals are near-instant and cost fractions of a cent in gas. That self-custody is the appeal for crypto-native users and the risk for everyone else, because there\u2019s no FDIC or SIPC backstop and no regulator to call if something goes wrong. Settlement mechanics differ too. Kalshi resolves against named third-party sources written into each contract\u2019s rules and handles disputes through a regulated channel. Polymarket leans on the UMA oracle and a market integrity committee, with contested outcomes escalating to a token-holder vote that can run two to four days. Most markets settle without drama on either side, but Polymarket\u2019s resolution disputes have occasionally gotten loud.\u00a0<\/p>\n

Which Should You Choose?\u00a0<\/h2>\n

If you\u2019re in the US and you\u2019re looking for a simple, regulated platform, Kalshi is the answer. Dollars in, dollars out, 1099 tax forms, a real regulator, no wallet to manage. You\u2019ll pay a bit more per trade and trade a slightly narrower list of event contracts but that\u2019s the price of the guardrails at the moment.\u00a0<\/p>\n

If you\u2019re crypto-native and fee-sensitive, Polymarket International is hard to pass up, assuming you can access it legally where you are. The maker fee is zero, most non-crypto categories undercut Kalshi, geopolitics contracts are free, and the market selection is the widest anywhere. The catch is custody, taxes, and the US access question all land on you.\u00a0<\/p>\n

FAQs<\/h2>\n

Is Kalshi or Polymarket better?<\/strong><\/h3>\n

It depends on factors such as location and cost. Users from the US can find a regulated exchange in Kalshi. However, for those looking to access more niche markets with lower fees, Polymarket may be the way to go.\u00a0<\/p>\n

What\u2019s the difference between Kalshi and Polymarket?<\/strong><\/p>\n

Kalshi is a CFTC regulated exchange that runs on US dollar, much like how a brokerage does. Polymarket on the other hand is an onchain platform on Polygon that settles in USDC and you hold your own funds.\u00a0<\/p>\n

Which has higher trading volume, Kalshi or Polymarket?\u00a0<\/strong><\/h3>\n

Currently Kalshi is in the lead by a long shot. Kalshi\u2019s monthly trading volume in June 2026 closed at $33 billion compared to Polymarket\u2019s $14.5 billion.\u00a0\u00a0\u00a0\u00a0<\/p>\n

Is Polymarket legal in the US like Kalshi?\u00a0<\/strong><\/h3>\n

Only Polymarket US, built on the CFTC-licensed exchange it bought, is legal in the US at the moment. Its international platform remains geo-blocked for Americans.\u00a0<\/p>\n

Can US residents use both Kalshi and Polymarket?<\/strong><\/h3>\n

US residents can access Kalshi but Polymarket international remains out of reach for users from the US.\u00a0<\/p>\n

Don\u2019t just read crypto news. Understand it. Subscribe to our newsletter. It’s free<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"

Two years ago the choice in the prediction market space was pretty straightforward. Polymarket was the crypto-native platform Americans weren\u2019t meant to touch while Kalshi was the regulated US exchange that played by the book. Fast forward to today and there are multiple other prediction market platforms like Rothera, Predictdotfun, Opinion, Limitless etc that are […]<\/p>\n","protected":false},"author":1,"featured_media":47523,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[],"tags":[],"class_list":["post-47522","post","type-post","status-publish","format-standard","has-post-thumbnail"],"yoast_head":"\nKalshi vs Polymarket 2026: Fees, Markets & US Legality - Cryptomag<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cryptomag.finance\/?p=47522\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kalshi vs Polymarket 2026: Fees, Markets & US Legality - Cryptomag\" \/>\n<meta property=\"og:description\" content=\"Two years ago the choice in the prediction market space was pretty straightforward. 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Polymarket was the crypto-native platform Americans weren\u2019t meant to touch while Kalshi was the regulated US exchange that played by the book. 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