# Fees

## BTC => bitoBTC

**Gas Fee**: The gas fee is determined by the target blockchain, such as Ethereum or Solana, and fluctuates based on network conditions. BitoBridge calculates an estimated gas fee, which is charged in the bridged token—ckBTC in this case. This fee is then used to cover the gas costs on the target chain.

**Protocol Fee:** BitoBridge charges this fee. The BitoBridge canisters run on IC and must be self-sustainable. The fee is charged in the bridged token—ckBTC in this case—to pay for operational cycles.

**Transaction Fee:** This includes an approval fee and a transfer fee, each 10 satoshi, for a total of 20 satoshi.

**KYT Fee:** A fee of 2000 satoshi, levied by the KYT service to ensure transaction compliance.

## bitoBTC => BTC

**Protocol Fee:** BitoBridge charges this fee. The BitoBridge canisters run on IC and must be self-sustainable. In this case, it is charged in the bridged token—ckBTC—to pay for operational cycles.

**Transaction Fee:**  10 satoshi for the approval fee.

**Gas Fee**: The gas fee is determined by the Bitcoin blockchain and fluctuates based on network conditions. In this case, BitoBridge calculates an estimated gas fee, which is charged in the bridged token—BTC. This fee is then used to cover the gas costs on the Bitcoin blockchain.

## ICRC => ERC20

**Gas Fee**: The target blockchain, such as Ethereum, determines the gas fee and fluctuates based on network conditions. BitoBridge calculates an estimated gas fee, which is charged in the bridged token—BTIO, for instance. This fee is then used to cover the gas costs on the target chain.

**Protocol Fee:** BitoBridge charges this fee. The BitoBridge canisters run on IC and must be self-sustainable. The fee is charged in the bridged token—ICRC token in this case—to pay for operational cycles.

**Transaction Fee:** 10 satoshi for the transfer fee.

## ERC20 => ICRC

**Protocol Fee:** BitoBridge charges this fee. The BitoBridge canisters run on IC and must be self-sustainable. In this case, it is charged in the bridged token—ICRC token in this case—to pay for operational cycles.

**Transaction Fee:**  10 satoshi for the transfer fee.


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