The Ethereum Foundation has confirmed that the upcoming Fusaka hard fork will introduce a protocol-level ceiling on how much gas a single transaction may consume, formally codified as EIP-7825. The cap is set at 2²⁴ gas—16,777,216 units—marking the first time Ethereum enforces a per-transaction limit distinct from the block gas limit. The change is already active on Holesky and Sepolia and will go live on mainnet when Fusaka activates .

In a post published October 21, Toni Wahrstätter framed the rationale in direct terms: “Starting with the upcoming Fusaka hard fork, EIP-7825 introduces a per-transaction gas limit cap of 2²⁴ (≈ 16.78 million gas).” The Foundation’s note emphasizes that while the cap bounds individual transactions, it does not alter the block gas limit; instead, it is

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