What Does It Cost to Bridge a Fee-On-Transfer Token?

A 2% transfer tax on both ends of a bridge leaves you with 96.04 tokens for every 100 sent, before bridge fees and gas. That example assumes the token charges 2% on each transfer, including the one on the destination chain. To estimate your cost, count every taxed transfer as well as the bridge’s own charges.

What charges make up the total cost?

Your total cost can include token tax, the bridge’s fee, and gas on one or both chains. These are separate charges, and a bridge quote may show only some of them.

The token tax is taken by the token contract when tokens move. A bridge may charge a protocol or relayer fee for moving value across chains; gas pays for transactions on the source or destination network. If the route swaps your token for another asset, that swap can also involve a fee and price impact.

For example, if 100 tokens are taxed at 2% when deposited, the bridge receives 98. If the destination transfer is taxed at the same rate, about 96.04 arrive before any other deductions. For a separate explanation of who pays the receiving-chain transaction fee, see Biswap’s guide to swaps without destination gas.

Why can the amount you receive differ from the quote?

A bridge quote may estimate an amount from the deposit you enter, while the bridge contract receives less after the token takes its tax. What happens next depends on how that bridge handles the token and whether its route supports fee-on-transfer behavior.

Some bridge designs lock or burn tokens on the source chain and release or mint an asset on the destination chain. If the source transfer delivers less than the bridge expects, the transaction may fail or the amount credited may differ. A destination-side tax can then reduce what reaches your wallet after release.

Check whether the displayed receive amount is before or after token tax, and whether the quote includes destination gas. That gas question is separate from the token tax: a route can cover the transaction fee while the token still deducts a portion on transfer.

How can you estimate the cost before bridging?

Start with the token contract’s tax rules and apply them to each transfer the route makes. Then add the bridge fee and any gas or swap costs the quote leaves out.

• Confirm the token address and network; similarly named tokens can have different contracts and transfer rules.
• Find out whether tax applies to transfers into the bridge, out of it, or both. Some tokens have changing rules, so a past transfer may not match the next one.
• Compare the quote’s input and expected output, and check whether it accounts for the token’s transfer tax.
• Check which chain pays gas and whether you need that chain’s native token for approval or a later transaction.

For most users, the better route is one that explicitly supports the token and shows a realistic destination amount. A low quoted bridge fee does not make a route cheap if the token tax is missing from the estimate or the transfer fails.