USDC and Polymarket in California: Why You Deposit Dollars Instead
If you hold USDC and want to trade on Polymarket from California, here's the short answer: the Polymarket US app takes US dollars, not USDC. What that means for crypto holders, and how to fund your account.
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TL;DR:
Californians use Polymarket through the Polymarket US app, which runs on a CFTC-regulated exchange and works in US dollars. You can't deposit USDC to it. Polymarket's international site uses USDC on the Polygon network, but it isn't open to US residents, and using a VPN to reach it breaks its terms. If you hold USDC, sell it for dollars on a US-regulated exchange, move the dollars to your bank, then deposit in the Polymarket US app. New users who deposit $10 with code CAPREDICTS get a $25 trading bonus. Keep records: selling crypto can be a taxable event, and trading profits are taxable federally and in California.
If you already hold USDC, you might expect to move it straight into Polymarket. From California, you can't: Polymarket's US product works in US dollars. Here's what that means and how to fund an account.
Can I deposit USDC to Polymarket from California?
No. Californians use Polymarket US, an app that runs on a CFTC-regulated exchange and clearing organization and takes US-dollar deposits only. Polymarket's international site settles in USDC on the Polygon network, but it isn't open to US residents.
How do crypto holders fund Polymarket US?
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Polymarket US · Deposit $10 get a $25 Trading Bonus!
CAPREDICTS
18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See polymarket.com/tos for more information. The Polymarket US App serves as an independent software provider and affiliate of Polymarket US and Polymarket Clearing, the CFTC-regulated exchange and clearing organization.
Last checked October 5, 2026
- Sell your USDC for dollars on a US-regulated exchange.
- Withdraw the dollars to your US bank account.
- Open the Polymarket US app, enter code CAPREDICTS at sign-up and verify your identity.
- Deposit at least $10 from the app's deposit screen to unlock the $25 trading bonus.
Polymarket US works in dollars: no wallet, no network, no bridge.
How to trade this
Fund Polymarket from California
- Create your account on Polymarket and claim your sign-up offer.
- Deposit US dollars in the app. Starting with $10-$25 is enough to learn how it works, and $10 unlocks the $25 bonus.
- Keep your crypto and your Polymarket trading separate: convert on a regulated exchange first, then deposit dollars.
Why not use the international site with a VPN?
It breaks Polymarket's terms, it can get your account closed and your funds frozen, and it gives up the protections of a US-regulated exchange. The Polymarket US app is legal in California for residents (minimum age 18; we recommend 21+).
What about taxes?
Ready to trade?
Polymarket: The world's largest prediction market, now live in the US.
Sign up at Polymarket US18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See polymarket.com/tos for more information. The Polymarket US App serves as an independent software provider and affiliate of Polymarket US and Polymarket Clearing, the CFTC-regulated exchange and clearing organization.
Selling USDC for dollars can be a taxable event, although gains are usually tiny because USDC tracks the dollar. Trading profits on Polymarket US are taxable federally and in California. Keep your exchange records and the app's trade history; see our California prediction market tax guide.
Sources
About the author
Catie Di Stefano
Catie Di Stefano has spent 15 years in the regulated gambling industry, starting at Betsson Group in Malta and spending nearly five years at Gaming Innovation Group (GiG) before building an independent consultancy across European and US iGaming brands, including a licensed engagement with Hard Rock Hotel & Casino Atlantic City under a New Jersey DGE vendor license. She's been interviewed by the California Business Journal on the rise of online gambling in the US, and spoke on a 2022 Next.io panel specifically about California's gaming market. She went on to build the OnlineGamblers.com brand and hold marketing director roles at Smartico.ai and Vegas Kings, and has been named to multiple iGamingExpress industry rankings. She now covers regulated prediction markets full-time.
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Keep reading
- Can I Use Polymarket in California? How to Deposit (2026)
- What Are Event Contracts? A Plain-English Guide
- Sports Betting Apps Legal in California (2026)
Keep the loop going
- This week's biggest price moves across the markets we track.
- Dated log of offer, ranking and state-availability changes so you know how current a page is.
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The weekly California markets email is launching soon. Until then, see this week's biggest moves and site updates.
Sources & further reading
Every figure and legal claim on this page traces back to a primary source. These are the ones we checked, open them and verify us.
- CFTC: Commodity Futures Trading Commission
The federal regulator that authorizes and supervises every event-contract exchange we cover.
- CFTC designated contract markets registry
Official list of registered exchanges, where we verify a platform's DCM status.
- Commodity Exchange Act (7 U.S.C. § 1 et seq.)
The federal statute that platforms cite as overriding state gambling law for event contracts; courts are still deciding how far it reaches.
- National Council on Problem Gambling
Free, confidential help and self-assessment tools (1-800-522-4700).
Keep reading
Next steps
Top platforms Californians are using:
Polymarket
The world's largest prediction market, now live in the US.
Sign up at Polymarket US18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See polymarket.com/tos for more information. The Polymarket US App serves as an independent software provider and affiliate of Polymarket US and Polymarket Clearing, the CFTC-regulated exchange and clearing organization.
Kalshi
The regulatory leader.
Sign up at KalshiCertain limitations apply. The offer is available to new users only, subject to the terms and conditions at kalshi.com/tc/500. 18+ only. Restrictions and eligibility requirements apply. Event contract trading involves significant risk and is not appropriate for everyone. Please carefully consider if it is appropriate for you in light of your personal financial circumstances. Kalshi products are not available in all jurisdictions. See kalshi.com/regulatory for more information.
Frequently asked questions
Can I deposit USDC to Polymarket from California?
No. Polymarket US, the app available to California residents, takes US-dollar deposits only. Polymarket's international site uses USDC, but it isn't open to US residents.
Is there a crypto network to choose when I deposit?
No. Deposits in the Polymarket US app are in US dollars, so there's no network to pick and no risk of sending funds on the wrong chain.
How much does it cost to deposit on Polymarket US?
The app shows any deposit fee before you confirm, and there are no crypto network fees. If you're converting USDC to dollars first, your exchange may charge its own fee.
Does Polymarket US issue tax forms?
Check the tax documents section of the Polymarket US app for what it provides. Either way, California residents must report trading gains and losses, so keep the app's trade history. See our California prediction-market tax guide.
I hold USDC on an exchange. How do I fund Polymarket US?
Sell the USDC for dollars on a US-regulated exchange, withdraw the dollars to your bank, then deposit from the Polymarket US app.
What happens if I send USDC to Polymarket anyway?
Don't. The Polymarket US app doesn't accept crypto deposits, and funds sent to the wrong place may not be recoverable. Use the app's dollar deposit instead.
Can I use Polymarket's international site from California with a VPN?
No. The international site isn't open to US residents, and using a VPN to reach it breaks its terms and can get your account closed. Use the Polymarket US app, which is legal in California for residents (minimum age 18; we recommend 21+).
Do I need to verify my identity on Polymarket US?
Yes. The app verifies your identity, usually with a government ID and your Social Security number, before you can deposit or trade. It typically takes 5 to 60 minutes.
Is selling USDC to fund Polymarket a taxable event?
Selling crypto for dollars can be a taxable event, although gains on USDC are usually tiny because it tracks the dollar. Keep your exchange records, and consult a tax professional if you have large crypto holdings.
Can I use a California debit card to fund Polymarket?
Use the payment methods the Polymarket US app offers on its deposit screen. You don't need to buy USDC or any other crypto first.
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18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See polymarket.com/tos for more information. The Polymarket US App serves as an independent software provider and affiliate of Polymarket US and Polymarket Clearing, the CFTC-regulated exchange and clearing organization.
