What a Network Fee (Gas) Is in Crypto
Gas is a small fee paid to the blockchain for processing a transaction. Here's why it exists, why it varies across networks, and who actually pays it.
A network fee, often called gas, is a small charge for processing a transaction on the blockchain. When you send cryptocurrency, a portion goes to the miners or validators who run the network rather than to the recipient. Without that fee, no one processes the transaction.
Why does this fee exist?
A blockchain runs on nodes that verify and record every transfer. The transaction fee is how those nodes get paid for their work. It also makes spam expensive: every operation costs something, so flooding the network costs money.
Why does the fee vary by network?
Each network is built differently. On Ethereum, gas can run several dollars during busy periods. On Tron or Solana, fees are fractions of a cent. That's a big reason why USDT on Tron is the go-to for stablecoin transfers: the cost of moving it is nearly zero.
Who pays the fee?
The sender. When you send USDT, you need a small amount of the network's native coin to cover gas: TRX on Tron, ETH on Ethereum, SOL on Solana. No native coin, no outgoing transaction.
Is a network fee the same as an exchange fee?
No. The network fee goes to the blockchain and is outside any service's control. An exchange or payment service fee is a separate charge for the service itself. A straightforward service shows both numbers before you confirm: you see the full picture before committing.
