Polymarket Review 2026

PredictionScout Score: 6.75 / 10

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.

For US residents, the picture is more complicated. Polymarket received CFTC approval in November 2025 and relaunched a regulated US platform in December 2025 — but that platform is still rolling out via waitlist as of March 2026. The global platform that most people know is still offshore and not available to US traders. A security breach in December 2025 drained an undisclosed number of user accounts. And the platform issues no tax forms whatsoever.

The score reflects what Polymarket is today for a US retail investor, not what it may become once the US platform is fully accessible. That score will likely rise. For now: excellent platform, meaningful barriers.

Last updated: March 2026 | Scoring basis: Public fee schedules, regulatory filings, 400+ Trustpilot reviews, Reddit community discussions, and on-chain volume data from Dune Analytics. 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

• US residents who want immediate access — the regulated US platform is still waitlist-only
• Non-crypto users — funding requires USDC on Polygon; no direct bank transfer
• Traders who prioritize fund safety and regulatory protection — Kalshi is the better choice
• Anyone who needs tax forms — the global platform issues none

Score Breakdown

Category-by-Category Analysis

1. Regulatory Status & Fund Safety — 5.5 / 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.

The catch: as of March 2026, Polymarket Exchange is still rolling out via waitlist. Access is not yet available to all US residents. When it is fully live, this category score will rise meaningfully.

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 today: Kalshi is the safer choice on fund security. That may change as Polymarket Exchange fully rolls out.

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 Exchange): 0.10% taker fee. Zero maker fee. That’s it.

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 a $100 trade at 50¢ odds:

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. 7-day volume of $2.2 billion. 30-day volume of $8 billion. For context, Kalshi’s total 2025 fee revenue was $263.5 million — Polymarket does that in a single day in total volume.

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 (Polymarket Exchange) has a more traditional onboarding flow with KYC and SSN — closer to what mainstream users expect. That experience will improve this score once fully rolled out.

7. Deposit & Funding Options — 4.5 / 10

This is the most significant practical barrier for new Polymarket users.

Funding options:

• Transfer USDC from an exchange (Coinbase, Kraken, Binance) — most efficient, minimal fees, requires an existing crypto account
• Buy with card via MoonPay, Robinhood Connect, or Coinbase Pay — works within the app, but these providers charge their own purchase fees (typically 1–4%)
• Direct wallet transfer — for users with funds already on Polygon
• Bridge from Ethereum mainnet — requires using a bridge protocol, introduces additional complexity and small fees

There is no bank transfer, no ACH, no direct debit card to account pathway. Every route to funding Polymarket goes through crypto infrastructure. For a user who has never bought cryptocurrency, the onboarding friction is substantial.

Compare to Kalshi: free bank transfer, $10K daily limit, funds available in 2–4 days. Polymarket wins on withdrawal speed and cost once you’re funded. Getting funded in the first place is harder.

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 6.75 because the platform’s trading mechanics are genuinely excellent — but those mechanics are currently inaccessible to most US retail investors, and the operational and safety record has real blemishes.

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.

If you’re a US retail investor who wants to open an account today with a bank transfer, get a 1099 at year end, and know your funds are federally protected — Kalshi is the better choice right now. Check back on Polymarket once the US exchange waitlist clears.

Score will be revisited when Polymarket Exchange opens to all US residents. The regulatory picture has improved dramatically since late 2025 — the operational experience needs to catch up.

Common Questions

Is Polymarket legal in the US?

The global Polymarket platform is not available to US residents. Polymarket received CFTC approval in November 2025 and launched a regulated US exchange (Polymarket Exchange) in December 2025, but it’s still in waitlist rollout as of March 2026. Some states have additional restrictions — Nevada, Tennessee, and Massachusetts face preliminary injunctions on specific contract types. 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. There is no ongoing risk reported as of March 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 global platform requires USDC on the Polygon network. You can buy USDC via MoonPay, Coinbase Pay, or Robinhood Connect within the app (fees apply), or transfer from an exchange like Coinbase. The US platform (Polymarket Exchange) will have more traditional funding options. No direct bank transfer to the global platform is available.

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?

On trading mechanics — fees, liquidity, market selection — Polymarket wins clearly. On regulatory protection, fund safety, accessibility for US retail investors, and tax reporting — Kalshi wins. The right answer depends on who you are. Crypto-native traders outside the US: Polymarket. US residents who want a bank-funded, federally-regulated account today: Kalshi. Full comparison: Kalshi vs. Polymarket.