Cross-chain · Polygon → BNB Chain
Swap USDC from Polygon to USDT on BNB Chain
Swap USDC from Polygon to USDT on BNB Chain. Circle USDC leaves Polygon. Tether USDT is what can arrive on BNB Chain. The issuer changes, and the destination token uses 18 decimals.
Sell 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359, native USDC on chain id 137, 6 decimals. Buy 0x55d398326f99059fF775485246999027B3197955, Tether on chain id 56, 18 decimals. Polygonscan shows the debit. BscScan shows the credit. POL pays the source. BNB pays anything you do later on BNB Chain. The destination network is BNB Chain.
Eighteen decimals will scare a raw-log reader
USDC.e is the wrong Polygon dollar
Keeping Circle means a different BNB Chain contract
Two gas coins, neither is the trade
Legal
Risk disclosure
XAUConnect is a non-custodial swap aggregator. Digital assets are volatile and may lose value rapidly. Content on this page is educational and not investment advice. Verify every contract address on the official block explorer before approving a transaction.
Frequently asked questions
What is the best way to swap USDC from Polygon to USDT on BNB Chain?
Sell 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359, native USDC on chain id 137, 6 decimals. Buy 0x55d398326f99059fF775485246999027B3197955, Tether on chain id 56, 18 decimals.
Is BNB Chain USDT the same as Ethereum USDT?
No. Ethereum Tether is 0xdAC17F958D2ee523a2206206994597C13D831ec7 and uses 6 decimals. This credit is 0x55d398326f99059fF775485246999027B3197955 on chain id 56 and uses 18 decimals. BscScan is the explorer. Approving the Ethereum contract does nothing for this hop. Chain id 56 is BNB Chain, and Etherscan will not list this credit.
What if I hold USDC.e?
Then this route is wrong. USDC.e is 0x2791Bca1f2de4661ED88A30C99A7a9449Aa84174. The quote spends 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359. Polygonscan shows which one you approved. You still need POL on chain id 137 for gas, separate from either dollar token. Approve only native Circle USDC, then confirm that address on Polygonscan. Do it before you sign.
Will the USDT pay BNB Chain gas?
No. Tether is not BNB. BNB is the native coin, labeled 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE on chain id 56. This route does not buy that label. Keep BNB in the destination wallet or the new USDT cannot be moved. BscScan will show the token without showing a gas credit.
Trade on XAUConnect
Open the swap page with this cross-chain route pre-selected, then connect your wallet on the source chain to quote and execute. You keep the keys.
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