How do you deposit USDC on Polymarket?

Buy USDC on any major exchange (Coinbase, Kraken, Binance). Send it to your Polygon wallet address, making sure you select the Polygon network and not Ethereum mainnet. Connect your wallet to Polymarket.com. Your USDC appears in your trading balance within minutes. Gas fees on Polygon are fractions of a cent. You can also deposit via credit card directly on Polymarket, though fees are higher.