Polymarket Review 2026

PredictionScout Score: 7.1 / 10 (raised from 6.75 in July 2026 — see changelog below)

Polymarket is the best prediction market in the world on trading mechanics. Lowest fees in the industry. Deepest liquidity. Widest market selection. If you’re a crypto-native user outside the US, it’s the obvious choice and it isn’t close.

And the biggest barrier we flagged in March is gone: Polymarket US opened to all US iOS users in May 2026, ending the waitlist. The regulated platform — run by QCX LLC under a CFTC Designated Contract Market registration — now accepts debit cards, Apple Pay, and bank transfers. No crypto required. That’s why the score rose from 6.75 to 7.1.

What still holds it back: US access is iOS-only (Android and web are pending), Nevada is paused, tax documentation remains unconfirmed, and the support operation hasn’t improved. Excellent platform, shrinking barriers.

Last updated: July 2026 | Score changelog: July 2026 — Regulatory 5.5→6.5 and Deposits 4.5→7.0 after the US platform opened fully with USD funding; composite 6.75→7.1. | Scoring basis: Public fee schedules, regulatory filings, Trustpilot and Reddit community research, and on-chain volume data. See our full methodology.

Quick Facts

Who Polymarket Is Best For

• Non-US residents who want the deepest liquidity and widest market selection
• Crypto-native traders already comfortable with USDC, Polygon, and wallet management
• High-volume traders for whom Kalshi’s higher fees meaningfully reduce returns
• Politics and geopolitics specialists — no platform matches Polymarket’s depth in these categories

Who Should Look Elsewhere

• Android and desktop-first traders — the US platform is iOS-only for now
• Nevada residents — trading is paused there
• Traders who prioritize the longest regulatory track record — Kalshi has years of DCM operating history; Polymarket US has months
• Anyone who needs confirmed tax forms — documentation practices remain unconfirmed on both Polymarket platforms

Score Breakdown

Category-by-Category Analysis

1. Regulatory Status & Fund Safety — 6.5 / 10

This is where Polymarket’s score is held back most, and where the situation is most in flux.

The global platform — what most people think of when they say “Polymarket” — operates offshore. User funds are held as USDC in smart contracts on the Polygon blockchain, not in CFTC-segregated custodial accounts. There is no regulatory backstop if something goes wrong at the platform level. Resolution of disputed markets is handled by the UMA oracle protocol, not by a regulated exchange rulebook.

The US platform is a different story. In November 2025, Polymarket acquired QCX — a firm that already held CFTC Designated Contract Market and Derivatives Clearing Organization licenses — for approximately $112 million. The CFTC issued an Amended Order of Designation, and Polymarket relaunched a compliant US-facing exchange (Polymarket Exchange) in December 2025. This platform requires full identity verification including SSN submission, and operates under the same federal framework as Kalshi.

Update, July 2026: the rollout is done. Polymarket US ended its waitlist and opened to all US iOS users in May 2026. It operates in 49 states — Nevada is paused, and sports-contract availability varies in the handful of states actively litigating against prediction markets. This is why the category score rose from 5.5 to 6.5: US residents now have real, funded access to a CFTC-designated exchange. The score isn’t higher because the US venue has months of operating history against Kalshi’s years, and the global platform — where most Polymarket volume still lives — remains offshore with smart-contract custody.

The December 2025 security breach is a significant mark against the platform regardless of platform version. A vulnerability in a third-party authentication provider (suspected to be the Magic Labs email login service) allowed attackers to access user accounts and drain funds. Polymarket acknowledged the breach but did not disclose how many users were affected or the total amount stolen. The vulnerability was remediated, but the response — opaque, limited disclosure, no published figure on user harm — was not handled well.

The UMA governance attack (2025) is a structural risk specific to the global platform. A single token holder controlling approximately 25% of UMA’s voting supply was able to manipulate the resolution of a $7 million bet. The market in question (“Ukraine agrees to Trump mineral deal before April?”) moved from 9% to 100% and resolved “Yes” despite no official agreement being signed. Polymarket has since transitioned to MOOV2 — a whitelisted proposer system — which closes the specific attack vector, but introduces a new criticism: outcome resolution is now controlled by a small approved group rather than open token governance.

For US traders who prioritize fund security above all: Kalshi’s longer operating record still gives it the edge, but the structural gap has closed — both now run CFTC-designated exchanges open to US retail.

2. Fees & Costs — 9.0 / 10

Polymarket’s fee structure is the most competitive in the industry, and it’s not particularly close.

US platform (Polymarket US): a formula-based taker fee of 0.05 × contract price × (1 − price) per contract — the same shape as Kalshi’s formula but with a coefficient of 0.05 versus Kalshi’s 0.07, capped at $1.25 per 100 contracts. Makers don’t just trade free; they earn a rebate of 25% of the taker fee. Deposits and withdrawals are free.

Global platform: Zero fees on the vast majority of markets. A small taker fee applies to select fast-moving markets (primarily short-duration crypto price markets) to curb latency arbitrage.

In practical terms, compare 200 contracts (a ~$100 position) at 50¢:

The zero-maker-fee model also has a structural effect on liquidity: it attracts passive market makers who post resting orders, tightening spreads for everyone. This is why Polymarket’s spreads are consistently tighter than Kalshi’s on comparable markets — the fee structure creates a better-functioning order book.

Deposit and withdrawal have no platform fees. Polygon network gas costs are fractions of a cent. The main cost friction is the crypto on-ramp (buying USDC via MoonPay or similar has its own fees), but that’s not a Polymarket fee — it’s a crypto infrastructure cost.

3. Market Selection — 8.5 / 10

By sheer volume and breadth, Polymarket’s market selection is unmatched globally.

As of March 1, 2026: 33,839 active markets. 24-hour trading volume of $436 million. 30-day volume of $8 billion. The World Cup has since pushed volumes to records — Kalshi and Polymarket combined cleared $44.8 billion in June 2026, with Polymarket US alone contributing over $3.5 billion in its first fully open month.

Volume by category (24-hour, March 2026):

The half-point deduction from a perfect score reflects a real issue: most of those 33,839 markets have minimal liquidity. Analysis of on-chain data shows that 505 contracts — less than 1.5% of all markets — account for 47% of all trading volume. A market existing on Polymarket and a market being tradeable at reasonable spreads are two different things.

4. Liquidity & Execution — 8.0 / 10

In the markets that matter, Polymarket’s liquidity is the best available anywhere.

Spreads on top markets run 2–5¢. Kalshi’s comparable markets run 3–8¢. The difference comes from structure: Polymarket’s zero maker fee pulls in passive liquidity providers who post resting orders. More resting orders means tighter spreads. This is a genuine and consistent advantage for active traders.

Polygon execution is near-instant and costs fractions of a cent per transaction. There are no order minimums. The combination of tight spreads, near-zero execution cost, and fast settlement makes Polymarket the best execution venue for traders who qualify to use it.

The caveat is the long tail. With 33,839 markets and most of the volume concentrated in fewer than 600, a significant portion of what Polymarket lists is effectively untradeable at reasonable prices. Stick to markets with meaningful open interest.

5. Withdrawal Experience — 6.5 / 10

Under normal circumstances, Polymarket withdrawals are the fastest in the industry. USDC to a Polygon wallet takes minutes. There are no platform fees. No 7-day clearing windows. No 90-day cliffs.

The December 2025 security breach complicates this picture. Attackers who gained access to user accounts via a third-party authentication vulnerability were able to drain balances. Polymarket confirmed the breach and stated it was remediated — but did not disclose how many users were affected or what the total loss was. For a platform that positions itself as decentralized and self-custodied, the lack of transparency on a security incident affecting user funds is notable.

Trustpilot reviews (1.3/5) include withdrawal complaints, though it’s difficult to disentangle breach-related cases from general disputes. Reddit sentiment is more balanced — many long-term users report no withdrawal issues in normal operation.

The practical guidance: use a hardware wallet or a reputable custodial exchange as your USDC destination. Don’t leave large balances in a Polymarket proxy wallet longer than necessary.

6. User Experience — 6.5 / 10

Polymarket’s interface is clean and well-designed. The tiled market grid is intuitive. Plain-language question framing makes contracts easy to understand. Search and filtering work well across a large market catalog. For someone already comfortable with crypto, it’s a smooth experience.

The barrier is the crypto layer. To fund a Polymarket account, you need USDC on the Polygon network. For a first-time user who has never bought crypto, that means: create a Coinbase account → buy USDC → send to Polygon → fund Polymarket. Or use MoonPay within the app, which works but adds a fee and introduces a third-party service. Neither path is frictionless for mainstream users.

Polymarket has reduced this friction meaningfully: the proxy wallet system now lets users log in with email and avoid managing a Web3 wallet directly. MetaMask has integrated Polymarket natively into its mobile app. These are real improvements. But “easier than it was” and “easy for a mainstream financial consumer” are still different things.

The US platform now delivers that mainstream experience: a native iOS app with KYC onboarding, USD funding, and no crypto anywhere in the flow. The remaining UX gap is platform coverage — US access is iOS-only, with Android and web still pending. When those ship, this score rises.

7. Deposit & Funding Options — 7.0 / 10

This category improved more than any other in 2026. What was Polymarket’s biggest practical barrier is now close to solved — for iOS users.

US platform: debit card (Visa/Mastercard), Apple Pay, online banking, and wire transfer, all with no deposit or withdrawal fees. Daily limits run $50,000 for cards and Apple Pay; wires (minimum $5,000) are unlimited. No crypto anywhere in the flow.

Global platform (non-US users): still crypto-only — USDC on Polygon via exchange transfer, direct wallet transfer, or in-app card purchases through MoonPay/Coinbase Pay (which charge their own 1–4% fees).

The score isn’t higher because the US funding stack is gated behind an iOS-only app, there’s no PayPal or Venmo, and the global platform’s crypto requirement still applies to everyone outside the US.

8. Tax & Reporting Tools — 3.0 / 10

The global Polymarket platform issues no tax forms. Not 1099-MISC. Not 1099-B. Nothing. It’s an offshore decentralized platform with no IRS reporting obligations as currently structured.

This doesn’t mean winnings aren’t taxable — they are. The IRS expects you to report all income regardless of whether you receive a form. Active Polymarket traders are responsible for tracking every trade, calculating gains and losses on Form 8949, and filing Schedule D. Given that prediction market contracts may be treated as capital assets, Section 1256 contracts, or ordinary income depending on how the IRS eventually rules, the uncertainty compounds the paperwork burden.

Third-party tools have filled some of this gap — polymarket.tax and PolyTrack both offer trade history export and gain/loss calculation. But these are external services with no official Polymarket integration or endorsement.

The US platform (Polymarket Exchange) will presumably issue appropriate 1099 forms given that SSN is collected at signup. That hasn’t been confirmed yet for the platform’s December 2025 launch. When it is, this score will improve.

For full guidance on prediction market taxes, see: Prediction Market Tax Guide

9. Customer Support — 3.0 / 10

Polymarket’s support infrastructure is the weakest of the platforms we reviewed.

Available channels: in-app chat widget and Discord tickets. No email. No phone. Response times are inconsistent — some users report quick responses, others report days of silence. The platform’s Trustpilot score of 1.3/5 reflects a user base with significant frustration, though a substantial portion of those reviews concern market resolution disputes rather than support interactions specifically.

The December 2025 security breach handling is the clearest evidence of a support function that isn’t built for crisis. Accounts were drained, users publicly reported losses, and Polymarket’s official response was a brief statement attributing the issue to a third-party provider without disclosing the scale of impact. For users trying to get help recovering funds, the experience was reported as unresponsive.

An important distinction: Polymarket’s decentralized architecture means that some traditional “support” issues simply don’t apply. Settlement disputes go through UMA governance, not a support ticket. Blockchain transactions are irreversible by design. This creates a different — and in some ways more limited — category of things support can actually help with. That doesn’t make the experience better for users who need help, but it does context the low score differently than a traditional platform’s support failures.

Polymarket vs. Competitors

Full reviews: Kalshi Review | FanDuel Predicts Review

Side-by-side: Kalshi vs. Polymarket | Best Prediction Market Platforms 2026

The Bottom Line

Polymarket earns a 7.1 because the trading mechanics are genuinely excellent and — as of May 2026 — US residents can finally reach them through a regulated, USD-funded, CFTC-designated exchange. The gap to Kalshi has narrowed from structural to operational.

If you’re outside the US, comfortable with crypto, and want the best possible trading experience on the widest set of markets at the lowest cost, Polymarket is the answer. Nothing else is close on those dimensions.

For US residents the choice is now genuinely close. Polymarket US wins on fees and liquidity in the markets it shares with Kalshi. Kalshi still wins on platform coverage (web and Android, not just iOS), confirmed tax forms, years of DCM operating history, and market breadth. Many active traders should simply hold both accounts.

Score will be revisited when Android/web access ships and tax documentation is confirmed. If the operational experience catches up to the mechanics, this platform challenges for #1.

Common Questions

Is Polymarket legal in the US?

Yes — through the regulated US platform. Polymarket US, operated by QCX LLC under a CFTC Designated Contract Market registration, opened to all US iOS users in May 2026 after ending its waitlist. It operates in 49 states — Nevada is paused, and sports-contract availability varies in states litigating against prediction markets. The global platform remains unavailable to US residents. Check the legal status guide for your state.

Was Polymarket hacked?

In December 2025, a vulnerability in a third-party authentication provider allowed attackers to access user accounts and drain funds. Polymarket attributed the breach to the external provider, stated the issue was remediated, and confirmed it would contact impacted users. The number of affected users and total funds lost were not publicly disclosed. No further incidents have been reported as of July 2026.

How does Polymarket resolve markets?

On the global platform, resolution is handled by the UMA Optimistic Oracle. A proposer suggests an outcome; if unchallenged within a window, it resolves. Disputes trigger UMA token holder voting. In 2025, a governance attack demonstrated the vulnerability of this system to large token holders. Polymarket has since moved to MOOV2, which restricts proposals to a whitelist of approved parties. The US platform (Polymarket Exchange) uses a separate regulatory-compliant resolution process.

How do I deposit money on Polymarket?

The US platform accepts debit cards, Apple Pay, online banking, and wire transfers — no crypto needed. The global platform (non-US users) requires USDC on the Polygon network, funded via exchange transfer or in-app providers like MoonPay and Coinbase Pay (fees apply).

Does Polymarket issue tax forms?

The global Polymarket platform issues no tax forms. Winnings are still taxable — users are responsible for tracking all trades and reporting on Form 8949. Third-party tools like polymarket.tax can help reconstruct trade history. The US platform collected SSN at signup and will presumably issue 1099 forms, though this has not been confirmed. See our Prediction Market Tax Guide for full guidance.

Is Polymarket better than Kalshi?

Closer than it used to be. On trading mechanics — fees, liquidity, market selection — Polymarket wins. Kalshi wins on platform coverage (web and Android), confirmed tax forms, regulatory track record, and regulated market breadth. Crypto-native traders outside the US: Polymarket, easily. US residents: genuinely either, and many active traders hold both. Full comparison: Kalshi vs. Polymarket.