The 21,000-Gas Standard Is About to Change With Ethereum’s Next Upgrade

Ethereum’s next major upgrade is set to change the familiar 21,000-gas rule for basic ETH transfers, introducing different transaction costs depending on whether the recipient’s address already exists.

With Glamsterdam, an ETH transfer to an existing account will continue to require 21,000 gas. Sending ETH to an address that has never been recorded on Ethereum, however, will cost more because the network must create and retain a new account entry.

The Ethereum Foundation has asked wallet developers, blockchain tracking services and fee calculators to update software built around the assumption that every standard ETH transfer costs exactly 21,000 gas. Gas measures the computational resources needed to process transactions, with users paying for that activity in ETH.

The proposed additional charge is 183,600 units of a new gas category called state gas.

Why Ethereum Is Moving Beyond 21,000 Gas

For years, the 21,000-gas figure has served as a standard reference for Ethereum transactions. Wallets use it when calculating how much gas to include, while other blockchain tools rely on the figure to estimate and process transfers.

That fixed assumption could become problematic after Glamsterdam. Software that treats 21,000 gas as the maximum cost of an ordinary ETH transfer could either underestimate the required fee or incorrectly reject transactions.

The change is based on the different workloads involved. When ETH is sent to an existing account, Ethereum only needs to update balances that are already stored in its state. A transfer to a brand-new address requires the network to create an account record and preserve it going forward.

Ethereum has historically charged the same amount for both operations despite that difference.

Upgrade Testing Starts Before Mainnet

Developers have time to modify their systems before Glamsterdam reaches Ethereum’s main network.

The upgrade will initially be tested on Platåberget, an Ethereum test environment that uses tokens with no monetary value. Developers can use it to identify potential issues before the changes progress to the Sepolia and Hoodi testnets.

After those testing phases, Glamsterdam is expected to move toward Ethereum’s mainnet.

For people simply sending or receiving ETH, there is no immediate action required. The main impact will fall on wallet providers, blockchain services, fee-estimation tools and other applications that currently depend on the 21,000-gas assumption.