What it is
A gas fee is a transaction fee paid by users to validators on the Ethereum network for processing and validating transactions or executing smart contract operations. These fees compensate validators for the computational resources required to secure the network. Gas fees fluctuate based on network demand and congestion; higher demand for block space leads to higher fees, as users bid against each other for their transactions to be included quickly.
Gas fees directly impact the cost of interacting with Ethereum-based applications, including buying NFTs, swapping tokens on a DEX, or participating in DeFi protocols. High gas fees can make small transactions uneconomical, pushing users towards Layer-2 solutions or alternative blockchains. Retail investors need to monitor current gas prices, often quoted in Gwei, to manage their transaction costs effectively and time their on-chain activities.
Why it matters
Gas fees affect your transaction costs on Ethereum, impacting profitability and accessibility of DeFi and NFT activities.
Reviewed under editorial standardsUpdated September 26, 2026Not investment advice