If you plan to use your stablecoins on Arbitrum, arrange a little ETH for gas before you need to send or swap anything. On Arbitrum One, transactions charge fees in ETH, so a wallet holding only USDC or another stablecoin may be unable to move those tokens.
Include ETH with the stablecoin when the route allows it
The simplest option is to arrive with both the stablecoin you want to use and enough ETH for a later transaction. This works best when your cross-chain route can move both assets as part of your plan; it does not fit if the route only transfers the stablecoin or if you need every dollar of your source balance for that transfer.
Think through the next action before you set the amount: sending a token, approving a token, and swapping can each require a transaction. A token approval gives a contract permission to use that token and may cost gas separately from the swap. The approval may already exist, but do not count on that when estimating your ETH buffer.
Planning the stablecoin destination first helps you account for that separate gas balance; how Biswap moves stablecoins to Arbitrum is relevant to that part of the decision. Biswap is a cross-chain bridge and swap service, so it can help move and exchange assets across networks in one flow.
For example, if you start with 100 USDC on Ethereum and intend to swap some after arriving on Arbitrum, the “before” plan is to send all 100 USDC and arrive with no ETH. The “after” plan leaves room for destination ETH as well, so you can pay for the later approval or swap. Treat any dollar amount you reserve as an estimate: fees change with network conditions and the transaction itself.
Fund Arbitrum separately if you already arrived without ETH
A separate top-up is best when the stablecoin transfer is already complete or the route cannot include ETH. You can send ETH to the same wallet on the same Arbitrum network from another wallet or an exchange that supports that network. Check the network name before sending: ETH on Ethereum is not already available as gas on Arbitrum.
biswap.uk is one example of a service that can move and swap crypto across networks. If you use any cross-chain service for a top-up, check that the resulting asset is native ETH on the destination network; a token with a similar name or a wrapped asset may not pay the wallet’s transaction fee.
When estimating the top-up, look at the wallet’s fee estimate for the action you intend to take, then leave some margin rather than funding exactly that estimate. Arbitrum fees include an execution component and a component tied to posting transaction data to Ethereum, so the total can vary. If you plan multiple actions, allow for each one; a failed transaction can still consume gas.
Check the balance and network before acting
After the transfer or top-up, switch your wallet to the intended Arbitrum network and confirm that its ETH balance is visible there. Then check that the stablecoin is also on that network and that you are interacting with the intended token. If ETH is missing, pause: a stablecoin balance alone will not cover an ordinary wallet transaction.
For an occasional user, the reliable habit is to plan the destination gas balance alongside the stablecoin transfer, then verify native ETH on Arbitrum before making the next transaction.
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