Can US citizens use Polymarket? The real answer

The key distinction: citizenship vs residence

Polymarket's geoblocking is based on IP location and KYC-detected residence, not citizenship directly. This creates different situations for different US-connected users:

Scenario 1: US citizen living in the US

Polymarket blocks all US IPs. You cannot access the platform from a US address. Using a VPN violates terms of service and creates KYC complications when you try to withdraw.

Legal alternative: Kalshi (available in all 50 states).

Scenario 2: US citizen living abroad

If you're physically abroad with a non-US IP and a local address, you can sign up for Polymarket normally. Complications arise:

KYC at fiat offramp: MoonPay and Onramper ask for ID. Your US passport may be flagged.
Tax: you still owe US tax. US citizens owe US income tax on worldwide income regardless of residence. You can't escape US taxation by using an offshore platform.
FBAR and FATCA: US citizens must report foreign accounts. Polymarket isn't a traditional bank but foreign crypto holdings have separate reporting requirements.

In practice: expat US citizens trade on Polymarket regularly. They navigate KYC and tax compliance carefully.

Scenario 3: Dual citizen (US + other) living abroad

Similar to Scenario 2. You're a US person for tax purposes. Polymarket access depends on your IP and KYC documentation.

Scenario 4: US green card holder abroad

US persons for tax purposes. Same as Scenario 2.

Scenario 5: Non-US citizen visiting the US

Your IP will show US during the visit. Polymarket will block you even though you're not a US person. Return to non-US IP to resume.

Why Polymarket blocks US residents

Polymarket settled with the CFTC in January 2022 for $1.4M (Order 22-09). The settlement required:

Blocking US IP addresses
Not soliciting US users
Winding down US-accessible markets

Polymarket complied immediately. The block is maintained at the IP level (via Cloudflare or equivalent) and at the KYC level (when onramps reveal US ID).

The block is a compliance posture, not a technical barrier. A VPN can circumvent the IP check but not the KYC check at meaningful withdrawal size.

What happens if you try with a VPN

We've documented this elsewhere (how to use Polymarket in the US) but to summarize:

VPN to a non-US IP works for access
Signup and trading work
At fiat offramp, KYC reveals US nationality via ID
Polymarket reviews and restricts the account
You can usually withdraw to your own crypto wallet, but fiat offramp is blocked
Account is effectively unusable going forward

For small trades or truly crypto-native users who never touch fiat, the path may work longer. For anyone else, it ends at the first big offramp.

Tax implications for US citizens using Polymarket

Regardless of which scenario applies, US citizens owe US tax:

US resident trading on Polymarket via VPN: Gains are taxable. Polymarket doesn't issue 1099. You're responsible for tracking every trade.
US citizen abroad trading on Polymarket legally: Gains are taxable. You may also owe foreign country tax (check local rules). Foreign tax credits may apply to avoid double taxation.
Failure to report: Tax evasion on crypto gains is increasingly prosecuted. IRS has partnered with blockchain forensics firms (Chainalysis, etc.) and identifies non-reporters routinely.

See polytaxes.com for detailed US tax analysis of prediction market activity.

What expat US citizens actually do

From community reports and our interviews, expat US citizens using Polymarket generally:

Sign up from their non-US country of residence — clean IP, local address
Fund via non-US exchange or in-country fiat onramp — avoiding US bank involvement
Withdraw to self-custody crypto wallets — not fiat offramp, which triggers ID review
File US taxes conservatively — report all gains, document all trades
Keep banking separate — don't try to deposit Polymarket crypto into a US bank account

This works for sophisticated users. It's not recommended for casual traders who aren't comfortable with the tax and compliance burden.

The Kalshi path for US citizens

For almost every US citizen — whether resident or expat with US tax obligations — Kalshi is the better answer:

Legal in the US and operates for US citizens worldwide (though account opening typically requires US residence)
Issues 1099s — massive tax simplification
CFTC-regulated — institutional custody and compliance
USD-native — no crypto complications
Most major market categories covered — politics, economics, sports, weather

The only users who genuinely benefit from Polymarket over Kalshi are:

Non-US citizens resident abroad (no Kalshi access)
US expats trading non-US events Kalshi doesn't cover
Crypto-native traders who strongly prefer decentralized architecture

For the vast majority of US-connected users, Kalshi is the clear choice.

The "can I" vs "should I" distinction

The question "can US citizens use Polymarket" often collapses two different questions:

"Is it technically possible?" — Yes with VPN and navigating KYC. Complicated, risky.

"Is it a good idea?" — Almost never. The combination of terms violation, KYC risk, tax complexity, and banking friction far outweighs the market-selection advantage Polymarket has over Kalshi.

For every US user, the correct first question is: "Does Kalshi cover what I want to trade?" If yes (and it usually does), use Kalshi. If no, consider the Polymarket path carefully.

FAQ

Frequently asked questions

Does Polymarket check my citizenship?+

Not directly. Polymarket checks IP and, at fiat offramp, KYC documents. Citizenship is revealed by passport/ID at KYC.

Can I sign up with a foreign passport if I'm a US citizen?+

Probably not. Know-your-customer rules require you to provide all relevant citizenships, and KYC providers cross-check databases. Misrepresenting identity can be a serious compliance issue.

What if I use a crypto wallet Polymarket doesn't know is mine?+

Polymarket identifies users by wallet+signature. Signing up with a fresh wallet from a non-US IP may work for a while, but any KYC touchpoint (MoonPay, Onramper) will reveal your US status.

Do I owe US tax if I use Polymarket via VPN?+

Yes. US persons owe US tax on worldwide income regardless of platform. Polymarket doesn't issue 1099, so you're responsible for self-reporting.

Can I legally use Polymarket as a green card holder?+

Same as US citizens — blocked from US IPs, tax obligations as a US person, KYC complications at offramps.

Will Polymarket ever allow US users?+

Only if Polymarket registers as a CFTC DCM or obtains specific regulatory relief. No public indication either is in progress.

Is it illegal to sign up for Polymarket as a US citizen abroad?+

Generally no — your legal status is governed by your country of residence and US tax law. But check local rules. Some jurisdictions restrict prediction markets for residents regardless of citizenship.

Do I lose my US citizenship benefits if I use Polymarket?+

No. Polymarket use has no impact on US citizenship or voting rights. It's a commercial compliance issue, not an immigration issue.