When creating a blockchain transaction, you have to include a transaction fee — a small amount that will be paid to miners for validating the transaction. Because each block contains a limited space, miners will naturally try to confirm transactions with higher fees first.
If you send funds using the CEX.IO platform, the fees are already included in your deposit and withdrawal amounts. CEX.IO strives to implement competitive fees for your transactions so they’re completed without delays. At the same time, we try to make these fees as low as possible so you don’t overpay for crypto withdrawals.