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Polymarket vs Kalshi 2026: Fees, Liquidity & Which One Wins
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Dec 26, 20258 min read175 views

Polymarket vs Kalshi 2026: Fees, Liquidity & Which One Wins

Polymarket has $9B volume and crypto. Kalshi is US-regulated and uses USD. We compare fees, markets, features, and profitability to help you choose.

LT

LaunchPoly Team

Polymarket vs Kalshi 2026: Fees, Liquidity & Which One Wins
#kalshi
#comparison
#polymarket
#prediction-markets
#trading

๐Ÿ’ก Key Takeaways

  • 1Polymarket: $9B volume, zero fees, requires crypto, technically blocks US users
  • 2Kalshi: CFTC-regulated, USD deposits, 1-7% fees, 100% legal in US
  • 3Polymarket has 10-50x more liquidity than Kalshi on major markets
  • 4Kalshi fees add up fast โ€” $500-800 difference over 100 trades
  • 5Smart traders use both for arbitrage and market access

Polymarket vs Kalshi: Which Prediction Market Should You Use in 2025?

Polymarket did $9 billion in volume in 2024. Kalshi is now legally available to US bettors after winning their CFTC court battle.

Both platforms let you bet on real-world events. Both have markets on elections, crypto, sports, and more.

So which one should you use?

I trade on both. Here's the honest comparison.


The 60-Second Summary

FeaturePolymarketKalshi
RegulationUnregulated (Crypto)CFTC-regulated (US)
CurrencyUSDC (Crypto)USD (Bank/Card)
US AccessOfficially blockedFully legal
Volume$9B+ (2024)~$500M (2024)
Fees0% trading1-7% per contract
Min Trade~$1$1
Markets500+ active200+ active
Best ForCrypto users, non-USUS residents, beginners

Bottom line: Polymarket has more volume and no fees but requires crypto and technically blocks US users. Kalshi is legal, takes USD, but has fees and less liquidity.

Polymarket: The Deep Dive

What Is Polymarket?

Polymarket is a prediction market built on Polygon (Ethereum L2). You trade using USDC stablecoin. Every trade settles on-chain, meaning full transparency.

In 2024, it became the largest prediction market in history with over $9 billion in volume โ€” mostly driven by the US presidential election.

Polymarket Pros

1. Zero Trading Fees

Polymarket charges no fees on trades. You pay only Polygon gas (~$0.01) and the spread.

Compare that to Kalshi's 1-7% fees, and the savings add up fast for active traders.

2. Highest Liquidity

More volume = better prices. On major markets (elections, crypto), Polymarket has 10-50x more liquidity than Kalshi.

This means tighter spreads and less slippage on large orders.

3. Full Transparency

Every trade is on-chain. You can:

  • Verify any trader's real P&L on Dune Analytics
  • Track whale wallets in real-time
  • Audit the entire order book

No other prediction market offers this level of transparency.

4. More Markets

Polymarket has 500+ active markets vs Kalshi's 200+. More niche events, more opportunities.

Polymarket Cons

1. Technically Blocks US Users

Polymarket uses geoblocking for US IP addresses. Many US users access it via VPN, but this is against their terms of service.

Not legal advice โ€” do your own research on your jurisdiction. 2. Requires Crypto

You need:

  • A crypto wallet (MetaMask, Coinbase Wallet, etc.)
  • USDC on Polygon network
  • Understanding of bridging, gas, etc.

If you've never used crypto, there's a learning curve.

3. No Customer Support

Decentralized means no phone number to call. Discord is your best bet for help.

4. Regulatory Risk

Polymarket operates offshore. Future regulations could impact access or withdrawals.


Kalshi: The Deep Dive

What Is Kalshi?

Kalshi is a CFTC-regulated prediction market based in New York. It's the first (and only) federally legal platform for event contracts in the US.

After winning a court battle in 2024, Kalshi can now offer political markets to US residents.

Kalshi Pros

1. 100% Legal in the US

This is Kalshi's killer feature. No VPNs, no gray areas, no regulatory risk.

Your funds are protected by US financial regulations.

2. USD Deposits

Link your bank account or debit card. No crypto required.

For beginners, this removes the biggest barrier to entry.

3. Clean Interface

Kalshi's app is polished and beginner-friendly. If you've never traded prediction markets, you'll figure it out in minutes.

4. Tax Reporting

Kalshi provides 1099 forms. Your gains and losses are properly documented for US taxes.

On Polymarket, you're responsible for tracking everything yourself.

Kalshi Cons

1. Trading Fees (1-7%)

Kalshi takes a cut of every trade. On low-probability events, fees can eat a significant portion of your profit.

2. Lower Liquidity

Less volume means:

  • Wider spreads
  • More slippage on large orders
  • Some markets barely trade
3. Fewer Markets

~200 active markets vs Polymarket's 500+. Fewer niche events available.

4. Withdrawal Limits

Kalshi has withdrawal restrictions and processing times. Not as instant as crypto.


Head-to-Head: Key Comparisons

Fees Example

You bet $100 on an outcome at 50ยข that wins:

Polymarket:
  • Cost: $100 (no fees)
  • Payout: $200
  • Profit: $100
Kalshi:
  • Cost: $100 + ~$3-5 fees
  • Payout: $200 - fees on exit
  • Profit: ~$92-95

On a single trade, small difference. Over 100 trades, Kalshi fees cost you $500-800.

Liquidity Example

2024 US Election, "Trump Wins" market:

Polymarket: $3.5B+ total volume, $50M+ daily Kalshi: ~$100M total volume

For elections, Polymarket dominates. For some niche events, Kalshi might have exclusive markets.

Market Coverage

Only on Polymarket:
  • Many crypto-specific markets
  • International events
  • More obscure categories
Only on Kalshi:
  • Some US-specific regulatory events
  • Certain economic indicators
Both have:
  • Elections
  • Major sports
  • Crypto prices
  • Fed decisions

Which Platform Should You Use?

Use Polymarket If:

โœ… You're outside the US (or willing to use VPN) โœ… You're comfortable with crypto wallets โœ… You trade actively and want zero fees โœ… You want maximum liquidity and market selection โœ… You value on-chain transparency

Use Kalshi If:

โœ… You're in the US and want 100% legal โœ… You prefer USD and bank deposits โœ… You're new to prediction markets โœ… You need proper tax documentation โœ… You want customer support access

Use Both If:

The smart move for serious traders: use both.

  • Arbitrage between platforms when prices diverge
  • Access exclusive markets on each
  • Hedge positions across both

The Arbitrage Opportunity

When the same event trades on both platforms, prices sometimes diverge. Example:

"Trump Wins" market (October 2024):
  • Polymarket: 58ยข
  • Kalshi: 54ยข

Buy on Kalshi, sell on Polymarket = risk-free 4% (minus fees and friction).

These opportunities are rare and fast, but they exist. Some traders run bots scanning both platforms 24/7.


Tools for Both Platforms

Whether you trade Polymarket, Kalshi, or both, you need good tools:

For Polymarket:

  • PolyTrack โ€” Whale tracking and alerts
  • Dune Dashboards โ€” On-chain analytics
  • Polymarket Whales โ€” Twitter alerts for big trades

For Kalshi:

  • Kalshi API โ€” Build custom trading tools
  • Kalshi Discord โ€” Community and market discussion

For Both:

  • Spreadsheet tracking โ€” Monitor positions across platforms
  • Arbitrage scanners โ€” Catch price divergences

๐Ÿ‘‰ Browse all Polymarket tools โ†’


Key Takeaways

  • Polymarket = More volume, zero fees, requires crypto โ€” Best for serious traders comfortable with crypto.
  • Kalshi = Legal in US, USD deposits, has fees โ€” Best for US residents and beginners.
  • Polymarket has 10-50x more liquidity on major markets like elections.
  • Kalshi fees (1-7%) add up fast for active traders.
  • Using both opens arbitrage opportunities and market access.

Ready to Start?

If you're new to prediction markets, try Kalshi for the easy onboarding.

If you want maximum edge, learn crypto and use Polymarket.

Either way, check out our tools directory to trade smarter:

๐Ÿ‘‰ See the best Polymarket tools โ†’


Questions? Join our community and ask other traders which platform they prefer.

Frequently Asked Questions

Is Polymarket legal in the US?

Polymarket officially blocks US users via geolocation. Many US traders access it using VPNs, but this violates their terms of service. Kalshi is the only fully legal prediction market for US residents after winning their CFTC court case in 2024.

Which has lower fees, Polymarket or Kalshi?

Polymarket has zero trading fees โ€” you only pay ~$0.01 Polygon gas. Kalshi charges 1-7% per contract. For active traders, this difference means $500-800 in extra costs per 100 trades on Kalshi.

Which prediction market has more liquidity?

Polymarket dominates with $9B+ volume in 2024 vs Kalshi's ~$500M. On major markets like elections, Polymarket has 10-50x more liquidity, meaning better prices and less slippage.

Can you arbitrage between Polymarket and Kalshi?

Yes โ€” when the same event trades at different prices on both platforms, you can buy low on one and sell high on the other. These opportunities are rare and fast but some traders run bots scanning both platforms 24/7.

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LT

Written by

LaunchPoly Team

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