Ethereum Gas Fees Explained: Why They’re High and How to Pay Less
Ethereum gas fees confuse many crypto beginners. This guide explains exactly what they are, why they fluctuate, and practical ways to reduce what you pay.
If you have ever tried to use Ethereum and been shocked by the transaction fees, you are not alone. Gas fees are one of the most confusing and frustrating aspects of the Ethereum ecosystem — and one of the biggest reasons alternative blockchains like Solana and Polygon have gained users.
But gas fees are also fundamental to how Ethereum works. Understanding them helps you use the network more intelligently and avoid overpaying.
What Are Gas Fees?
Every transaction on Ethereum requires computational work. When you send ETH, swap tokens on Uniswap, or mint an NFT, the Ethereum network must process your transaction and include it in a block.
Gas is the unit that measures how much computational work a transaction requires. A simple ETH transfer requires 21,000 units of gas. A complex DeFi transaction might require 200,000 or more units of gas.
The fee you pay is: gas used × gas price. Gas price is denominated in gwei (pronounced “gway”). One gwei equals 0.000000001 ETH.
When the Ethereum network is busy, users bid higher gas prices to get their transactions processed faster. When it is quiet, you can pay less. This is why gas fees are not fixed — they fluctuate based on demand for block space.
How EIP-1559 Changed Gas Fees
In August 2021, Ethereum implemented EIP-1559, which fundamentally changed how gas fees work. Before this update, gas pricing was a simple auction: you bid and hoped miners accepted your transaction.
EIP-1559 introduced a base fee — a minimum gas price that all transactions in a given block must meet, set by the protocol based on how full the previous block was. The base fee is burned (destroyed), permanently removing ETH from circulation. Users can also add a “priority fee” tip to incentivise validators to include their transaction faster.
This made gas fees more predictable. Your wallet now shows an estimated fee range rather than requiring you to guess. The base fee adjusts up when blocks are full and down when blocks are empty.
Why Gas Fees Can Be Very High
Ethereum processes roughly 15-30 transactions per second on its base layer. When demand for block space exceeds this capacity, fees spike.
Major events that historically caused gas fee spikes include:
Popular NFT mints: When a hyped NFT collection opens minting, thousands of users try to transact simultaneously. Gas wars have seen fees exceed £500 per transaction.
Market crashes: When crypto prices drop sharply, everyone wants to close positions or add collateral at the same time. DeFi liquidation cascades also generate enormous transaction volumes.
New token launches: When a popular new token becomes available, users rush to buy before the price rises.
In 2026, base layer Ethereum fees are generally lower than their 2021-2022 peaks because significant activity has migrated to Layer 2 networks. However, fees can still spike to £20-50 during busy periods.
How to Pay Less in Gas Fees
There are several practical strategies for reducing what you pay in Ethereum gas.
Transact during off-peak hours: Ethereum gas fees follow usage patterns. They are typically lowest late at night (UK time) and on weekends, when US traders are less active. Tools like ETH Gas Station and Etherscan’s Gas Tracker show current and historical fee levels.
Use Layer 2 networks: Move your activity to Arbitrum, Optimism, or Base for the vast majority of DeFi transactions. Fees on these networks are typically 95% lower than mainnet Ethereum, and you benefit from the same security guarantees. Most major DeFi protocols are now available on Layer 2.
Use Polygon or other alternative chains: For even cheaper transactions, Polygon PoS fees are a fraction of a penny. Many applications are available across multiple chains — choose the cheaper one when the transaction value does not justify high fees.
Set a maximum gas price: Most wallets allow you to set a maximum fee you are willing to pay. If the base fee is above this level, your transaction will wait. This is useful for non-urgent transactions — just make sure the maximum is realistic or your transaction may sit unconfirmed indefinitely.
Batch transactions: Some DeFi protocols allow you to combine multiple actions into a single transaction. Instead of approving a token and then swapping it (two transactions), you might be able to do both in one.
Use gas tokens: Some advanced users use gas tokens — tokens that store gas during low-fee periods and can be burned during high-fee periods to offset the cost. This is complex and not recommended for beginners.
Gas Fees and the Future of Ethereum
The long-term solution to Ethereum’s gas fee problem is a combination of Layer 2 scaling and base layer improvements called “danksharding.” The goal is to increase Ethereum’s capacity for Layer 2 transactions by 100x, dramatically reducing the cost of Layer 2 operations.
EIP-4844 (Proto-Danksharding), implemented in March 2024, was a major step in this direction. It reduced the cost of Layer 2 data storage on Ethereum mainnet by approximately 90%, causing Layer 2 fees to fall to fractions of a penny on most networks.
Full danksharding is still years away, but the trajectory is clear: Ethereum’s strategy is to handle most activity on Layer 2 networks while the mainnet focuses on security and settlement.
What This Means for UK Ethereum Users
For most UK crypto users, the practical advice is: use Layer 2 networks for everyday DeFi activity. Move to mainnet Ethereum only when you have to — for example, when bridging between networks or using a protocol not yet available on Layer 2.
Gas fees paid are deductible as transaction costs when calculating Capital Gains Tax in the UK. Keep records of all gas fees paid — they can meaningfully reduce your tax bill.
This article is for educational purposes only and does not constitute financial advice. Cryptocurrency investments involve significant risk. Always do your own research.
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