What Are Gas Fees in Crypto?

fomoFebruary 19, 2026

Gas fees are the transaction costs you pay to use a blockchain network. Every time you send crypto, swap tokens, or interact with a smart contract, the network charges a fee to process your transaction. Think of gas as the fuel that powers blockchain operations.

Why Gas Fees Exist

• Network security - Fees compensate the validators or miners who process and verify transactions
• Spam prevention - Without fees, anyone could flood the network with millions of free transactions
• Resource allocation - When the network is busy, higher fees prioritize your transaction over others

How Gas Fees Vary by Blockchain

Different blockchains have very different fee structures:

• Ethereum mainnet - The most expensive, often $5-50+ per transaction during peak demand
• Solana - Extremely cheap, typically fractions of a cent per transaction
• Base - Very affordable as an Ethereum Layer 2, usually a few cents
• BNB Chain - Low fees, typically a few cents per transaction

Why Fees Spike

Gas fees aren't fixed. They change based on network conditions:

• High demand - When lots of people are trying to transact at once, fees go up as users bid to have their transactions processed first
• Popular token launches - New memecoin launches can cause massive fee spikes as thousands of traders try to buy simultaneously
• Market volatility - Big price swings trigger a rush of trading activity, congesting networks
• NFT drops - Major NFT launches have historically caused extreme gas spikes on Ethereum

How fomo Handles Gas Fees

On fomo, you don't need to think about gas fees in the traditional sense. Instead of buying and managing native tokens like ETH, SOL, or BNB to pay for gas, fomo provides a unified USD balance that works across all supported chains. Transaction costs are handled seamlessly, so you can focus on trading rather than managing gas across multiple blockchains.