Ethereum’s Next Upgrade Breaks the ‘21,000 Gas’ Rule Wallets Rely On
Glamsterdam will charge 183,600 extra gas units for sends to new addresses, ending a flat-fee assumption that wallets and exchanges have built on for years.
Ethereum’s Glamsterdam upgrade will end the flat 21,000-gas fee for basic ether transfers, charging more when funds go to a brand-new address and breaking an assumption that years of wallet and exchange software take for granted.
Under the change, sending ether (ETH) to an existing account still costs 21,000 gas. Transfers to a never-before-used address will incur an additional 183,600 units of a new category called “state gas,” the Ethereum Foundation said in a blog post flagged by CoinDesk. Gas is Ethereum’s measure of the computational work a transaction demands. Users pay for it in ETH.
In practice, wallets and fee estimators that treat 21,000 as both floor and ceiling for a simple transfer will quote too little gas on first-time sends. Transactions could stall. They could fail outright.
The 21,000-gas figure has been fixed since Ethereum launched. It applied whether the recipient existed or not. The new model reflects a distinction the old one never had to make: paying an existing account only adjusts balances the network already tracks, while paying a fresh address forces it to create and store a new record permanently.
Years of software grew around that fixed number. A wallet uses it to decide how much gas to attach to a payment. A block explorer uses it to sort transactions. Anything treating 21,000 as both the floor and the ceiling will reject valid payments or quote fees that come up short, the Foundation warned.
The warning targets wallet makers, blockchain trackers, and fee calculators specifically. These are the companies whose software end users depend on. Nobody sending ETH needs to do anything this week. The Foundation urged developers to test their tools on Platåberget, a practice network that uses worthless tokens, before the new gas model reaches Sepolia and Hoodi and then Ethereum mainnet. Cointelegraph separately confirmed the Foundation’s warning that some tools may break.
The new model switches on Thursday on Platåberget. Two more test networks come after that, then mainnet. No date for the mainnet activation was given.
Ethereum trades near $1,899.97 at press time, according to CoinDesk’s price data.
That part is new. The distinction between a transfer and a record-creation. Software that never had to tell the difference now does.
