What Are Gas Fees in Crypto?

Every blockchain charges a small fee to do anything on it. Sending a coin, swapping one token for another, voting on DAOs: all of it costs something to process. That fee is called gas, and it is the part of crypto that catches the most people off guard the first time they run into it.

Gas fees in crypto are the price of using a network. They go to the people running the computers that verify transactions and keep the system honest. Without them the network would have no way to pay for its own operation and no realistic way to stop spam.

This piece walks through where crypto gas fees come from, why the price moves around, and what your options are if you would rather not deal with them at all.

What gas fees actually are

A level below the headline definition, gas is a measure of computational work. Every action on a blockchain takes some amount of work to process, and the fee reflects how much work yours requires. A plain transfer takes very little, a swap through a decentralized exchange takes more, and a deposit into a multi-asset portfolio takes more still.

The fee itself is paid in whatever coin the network treats as native. On Ethereum that means ETH, on Solana SOL, on Polygon MATIC. The people maintaining the network are paid in that coin for processing your request and adding it to the public record.

The price varies a lot depending on the chain. A simple send on Ethereum mainnet usually runs a couple of dollars, while the same action on Solana costs a few cents. The mechanism is the same in every case, but the bill at the end of it is very different.

Why every chain makes you hold its own coin

This is the part that frustrates new users more than the dollar amount of any individual fee. To do anything on Ethereum you need a small balance of ETH sitting in your account. This amount is needed for you to run any operations on the Ethereum chain itself.

Holding $500 of stablecoins on Ethereum and being unable to move them because you do not also have a few dollars of ETH is a common first experience. The stablecoins are the money you actually care about, but the ETH is the toll you need to pay to use the road.

It is roughly like needing a small amount of local currency in every country you visit, even when your real money is in dollars. The country is the network, and the local currency is whatever coin the network accepts as payment for running itself.

Why gas fees go up and down

Two things drive the price of gas: how busy the network is, and how complex your transaction is.

A plain transfer is cheap because it asks the network to do almost nothing, while a token swap involves several smaller steps and costs more. A multi-step interaction with a lending protocol or a portfolio app costs more than either, because the network has to process every step in sequence.

Congestion is the other half. Each block has limited room, and when more people want to use the network than a block can fit, users bid against each other for a spot. The highest bids get processed first. This is why the same swap that cost 50 cents in the morning can cost several dollars in the afternoon: nothing about the swap changed, only the length of the line.

What gas fees actually cost in practice

A simple send on Ethereum mainnet is usually a couple of dollars during normal hours, while the same action on Solana costs a fraction of a cent. Base, Arbitrum, and Polygon tell a similar story to Solana.

The frustration that outlasts any single fee is the requirement to stock the native token in the first place. You do not just spend gas, you keep some on hand at all times, on every chain you touch, just to be allowed to move anything else.

The fees you don't always see

The visible gas fee is not always the whole cost of an onchain transaction, and there are a few other costs worth knowing about.

Slippage is the difference between the price you expected and the price you actually got, and it tends to be larger on thinner markets.

Routing costs show up when a swap passes through more than one liquidity pool to find the best rate, since each hop has its own small fee rolled into the final price.

Bridge fees apply when you move assets from one chain to another, since the bridge does work on both sides.

Failed transactions still cost gas, because the network did the work of trying even if the transaction reverted.

None of these are scams. They are also the reason the real cost of an action is rarely just the headline gas number.

How to actually avoid paying gas

There are three practical options, ordered by how much you have to think about them.

Time it. Gas tends to be cheaper on weekends and late nights UTC, when demand drops. If you are paying gas yourself, this is the simplest way to save real money, though it requires paying attention to when you transact.

Use a cheaper chain. Solana, Base, Arbitrum, and Polygon all cost far less than Ethereum mainnet for the same actions. The tradeoff is that you still need to hold the native token of whichever chain you picked.

Use an app that pays gas for you. This is the newest option and the one most people do not know exists yet. A small number of platforms now cover gas on behalf of their users, so the experience matches what most people are used to from a normal investing app: you do the thing, you do not see a fee, and you never need to hold a native token to make your account work. It is the only version of this that solves both problems at once, the cost and the native-token requirement.

Glider is one of the platforms that does this. Fund an account, pick what you want to hold, and Glider handles the gas, the routing, and the rebalancing in the background. You hold what you actually want to hold, and the chain a transaction happens on stops being your problem.

Why this matters more than it sounds

Gas fees were never the point of going onchain. They were a side effect of the infrastructure being early, and one the industry has slowly been working its way out of.

The bigger side effect, and the one that gets talked about less, is the requirement to hold a different coin on every network just to use it. That part has shaped the experience of onchain investing more than any single transaction fee ever has.

The moment investing onchain stops feeling like maintenance is the moment it starts feeling like the rest of finance.