What is Ethereum Gas? A 2026 Guide for Australians

Ethereum gas is the unit that measures how much computing work a transaction takes on the Ethereum network, and a gas fee is what you pay for that work in ETH. This guide covers how fees are calculated from a base fee plus an optional priority tip, what a gas limit does, why fees spike when the network is congested, practical ways to pay less, and the Australian angle: the ATO generally treats crypto as a CGT asset, so spending ETH on a fee can be a disposal. Education only — not financial advice. Publisher: Eagle BTM Pty Ltd ACN 659 281 820 (AUSTRAC DCE / VASP).

What is Ethereum gas? How ETH gas fees work (base fee + tip), gas limits, why fees spike, how to pay less, and ATO CGT notes for Australians in 2026.