Before bridging, check that you can pay for your first action on the destination chain. Destination gas is the chain’s native token used to pay for transactions, and receiving a bridged token may not give you any.
Why does destination gas matter?
Gas is the computing work a network charges for processing a transaction. The fee is paid in that network’s gas token, even when your transaction moves a different token. For example, a swap using USDC still needs gas.
A bridge route can involve a transaction on the source chain, followed by delivery on the destination chain. Depending on the route, delivery may happen automatically or require a separate claim. Either way, using, swapping, or sending the delivered tokens later usually needs destination gas.
Imagine you bridge USDC to Polygon for a purchase. Your USDC arrives, but you have no POL, Polygon’s gas token. You can see the balance, yet you may be unable to swap or send it until you get some POL.
How can you prepare before bridging?
Check what you plan to do after delivery, then check that you have enough of the destination chain’s gas token for those actions. A transfer, token approval, and swap each use a transaction; an approval lets a token contract spend tokens for you. The cost depends on the action, network demand, and the fee estimate when you submit it.
When comparing routes, include this next step in your decision. Bungee Bridge aggregates routes across bridges and decentralized exchanges (DEXs, which let people swap tokens through software). The Bungee Bridge app is one way to explore a route; check separately whether your destination wallet will have gas for what comes after.
Use these three checks before you start:
- Identify the destination chain and its native gas token. For Polygon PoS, that token is POL.
- Decide your first action after arrival, such as swapping USDC or sending it to another wallet.
- Check your destination gas balance against the wallet’s estimate for that action. Leave a buffer because fees can change before you transact.
If you lack gas, arrange a small amount on the destination chain before relying on the bridged funds. The amount needed is set by the transaction and live network fees, so there is no single amount that fits every bridge or swap. Avoid bridging your entire available balance if you may need funds for another transaction.
Common questions
Does the bridge pay destination gas for me?
Some routes or services may offer a way to cover or handle destination execution, while others deliver tokens for you to manage. Do not assume this from the fact that a bridge transfer completed. Check what the specific route says will happen, and keep destination gas available for any later transaction you initiate.
Can I use the token I bridged to pay gas?
Usually, no. A bridged USDC balance is a token on the destination chain; the network generally charges gas in its native gas token. Some wallets or transaction systems can support other fee methods, but unless your transaction explicitly offers one, plan to hold the chain’s usual gas token.
Why did my balance arrive if I cannot move it?
Receiving tokens and sending a new transaction are separate events. The bridge can deliver tokens to your address without giving that address gas for its next transaction. Once you obtain a small amount of the destination gas token, you can try the intended action again and check its fee estimate.
How much destination gas should I keep?
Base it on the next action rather than a fixed percentage of your bridged amount. A token approval followed by a swap may need two transactions, while a simple transfer needs one. Check each fee estimate and leave room for price changes. Before acting, ask: do I have the right gas token for what I plan to do next?